./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.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_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/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_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/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_9eae439b-38e0-492a-a672-72c2751d7a67/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 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:54:40,131 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:54:40,203 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-14 03:54:40,208 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:54:40,209 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:54:40,235 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:54:40,236 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:54:40,236 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:54:40,236 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:54:40,236 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:54:40,237 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:54:40,237 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:54:40,237 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:54:40,237 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:54:40,237 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:54:40,237 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:54:40,237 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:54:40,238 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:54:40,238 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:54:40,238 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:54:40,238 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:54:40,238 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:54:40,239 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-14 03:54:40,239 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-14 03:54:40,239 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:54:40,239 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:54:40,239 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:54:40,239 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:54:40,239 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:54:40,240 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-14 03:54:40,240 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-14 03:54:40,240 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-14 03:54:40,240 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:54:40,240 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 03:54:40,240 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:54:40,240 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 03:54:40,241 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:54:40,241 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:54:40,241 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:54:40,241 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:54:40,241 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:54:40,241 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:54:40,242 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:54:40,242 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:54:40,242 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:54:40,242 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:54:40,242 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:54:40,242 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:54:40,242 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:54:40,242 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_9eae439b-38e0-492a-a672-72c2751d7a67/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 -> 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b [2024-11-14 03:54:40,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:54:40,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:54:40,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:54:40,526 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:54:40,527 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:54:40,528 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c Unable to find full path for "g++" [2024-11-14 03:54:42,548 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:54:42,780 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:54:42,780 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2024-11-14 03:54:42,787 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/data/cfe241e8f/f1772d12074f4b0fa38c55086d4bbe05/FLAGf8f05314e [2024-11-14 03:54:42,809 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/data/cfe241e8f/f1772d12074f4b0fa38c55086d4bbe05 [2024-11-14 03:54:42,812 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:54:42,815 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:54:42,818 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:54:42,818 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:54:42,824 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:54:42,825 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:54:42" (1/1) ... [2024-11-14 03:54:42,828 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7edd676f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:54:42, skipping insertion in model container [2024-11-14 03:54:42,829 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:54:42" (1/1) ... [2024-11-14 03:54:42,845 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:54:43,039 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:54:43,051 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:54:43,071 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:54:43,089 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:54:43,090 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:54:43 WrapperNode [2024-11-14 03:54:43,090 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:54:43,091 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:54:43,091 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:54:43,092 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:54:43,099 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:54:43" (1/1) ... [2024-11-14 03:54:43,108 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:54:43" (1/1) ... [2024-11-14 03:54:43,130 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2024-11-14 03:54:43,130 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:54:43,131 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:54:43,131 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:54:43,131 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:54:43,140 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:54:43" (1/1) ... [2024-11-14 03:54:43,141 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:54:43" (1/1) ... [2024-11-14 03:54:43,143 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:54:43" (1/1) ... [2024-11-14 03:54:43,146 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:54:43" (1/1) ... [2024-11-14 03:54:43,151 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:54:43" (1/1) ... [2024-11-14 03:54:43,161 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:54:43" (1/1) ... [2024-11-14 03:54:43,163 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:54:43" (1/1) ... [2024-11-14 03:54:43,164 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:54:43" (1/1) ... [2024-11-14 03:54:43,170 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:54:43,171 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:54:43,171 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:54:43,171 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:54:43,172 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:54:43" (1/1) ... [2024-11-14 03:54:43,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:54:43,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:54:43,215 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:54:43,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:54:43,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 03:54:43,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:54:43,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:54:43,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 03:54:43,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 03:54:43,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 03:54:43,352 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:54:43,356 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:54:43,608 INFO L? ?]: Removed 27 outVars from TransFormulas that were not future-live. [2024-11-14 03:54:43,610 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:54:43,699 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:54:43,703 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-14 03:54:43,703 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:54:43 BoogieIcfgContainer [2024-11-14 03:54:43,704 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:54:43,706 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:54:43,707 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:54:43,719 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:54:43,720 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:54:42" (1/3) ... [2024-11-14 03:54:43,721 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485d62ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:54:43, skipping insertion in model container [2024-11-14 03:54:43,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:54:43" (2/3) ... [2024-11-14 03:54:43,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485d62ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:54:43, skipping insertion in model container [2024-11-14 03:54:43,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:54:43" (3/3) ... [2024-11-14 03:54:43,724 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-read.c [2024-11-14 03:54:43,748 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:54:43,750 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG ArraysWithLenghtAtDeclaration_-read.c that has 1 procedures, 19 locations, 1 initial locations, 3 loop locations, and 8 error locations. [2024-11-14 03:54:43,815 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:54:43,835 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;@6d1697f2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:54:43,836 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-14 03:54:43,840 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 10 states have (on average 2.2) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:54:43,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 03:54:43,849 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:54:43,850 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 03:54:43,850 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:54:43,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:54:43,861 INFO L85 PathProgramCache]: Analyzing trace with hash 2929705, now seen corresponding path program 1 times [2024-11-14 03:54:43,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:54:43,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209702379] [2024-11-14 03:54:43,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:54:43,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:54:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:54:44,143 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 03:54:44,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:54:44,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209702379] [2024-11-14 03:54:44,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209702379] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:54:44,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:54:44,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:54:44,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422452782] [2024-11-14 03:54:44,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:54:44,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:54:44,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:54:44,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:54:44,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:54:44,179 INFO L87 Difference]: Start difference. First operand has 19 states, 10 states have (on average 2.2) internal successors, (22), 18 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) 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 03:54:44,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:54:44,244 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2024-11-14 03:54:44,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:54:44,247 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 03:54:44,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:54:44,254 INFO L225 Difference]: With dead ends: 23 [2024-11-14 03:54:44,254 INFO L226 Difference]: Without dead ends: 22 [2024-11-14 03:54:44,256 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:54:44,259 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:54:44,260 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:54:44,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-14 03:54:44,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2024-11-14 03:54:44,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 2.0) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:54:44,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2024-11-14 03:54:44,293 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 4 [2024-11-14 03:54:44,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:54:44,293 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2024-11-14 03:54:44,293 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 03:54:44,293 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2024-11-14 03:54:44,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 03:54:44,294 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:54:44,294 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 03:54:44,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:54:44,294 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:54:44,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:54:44,295 INFO L85 PathProgramCache]: Analyzing trace with hash 2931392, now seen corresponding path program 1 times [2024-11-14 03:54:44,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:54:44,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619238284] [2024-11-14 03:54:44,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:54:44,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:54:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:54:44,438 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 03:54:44,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:54:44,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619238284] [2024-11-14 03:54:44,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619238284] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:54:44,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:54:44,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:54:44,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763063917] [2024-11-14 03:54:44,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:54:44,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:54:44,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:54:44,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:54:44,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:54:44,441 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 1.0) 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 03:54:44,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:54:44,543 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2024-11-14 03:54:44,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:54:44,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) 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 03:54:44,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:54:44,545 INFO L225 Difference]: With dead ends: 22 [2024-11-14 03:54:44,545 INFO L226 Difference]: Without dead ends: 22 [2024-11-14 03:54:44,545 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 [2024-11-14 03:54:44,546 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:54:44,546 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 10 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:54:44,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-14 03:54:44,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2024-11-14 03:54:44,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:54:44,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2024-11-14 03:54:44,550 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2024-11-14 03:54:44,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:54:44,550 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2024-11-14 03:54:44,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) 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 03:54:44,550 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2024-11-14 03:54:44,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 03:54:44,551 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:54:44,551 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 03:54:44,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 03:54:44,551 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:54:44,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:54:44,552 INFO L85 PathProgramCache]: Analyzing trace with hash 2993050, now seen corresponding path program 1 times [2024-11-14 03:54:44,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:54:44,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286806192] [2024-11-14 03:54:44,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:54:44,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:54:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:54:44,614 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 03:54:44,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:54:44,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286806192] [2024-11-14 03:54:44,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286806192] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:54:44,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:54:44,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:54:44,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410950187] [2024-11-14 03:54:44,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:54:44,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:54:44,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:54:44,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:54:44,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:54:44,616 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:54:44,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:54:44,665 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2024-11-14 03:54:44,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:54:44,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-14 03:54:44,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:54:44,667 INFO L225 Difference]: With dead ends: 35 [2024-11-14 03:54:44,667 INFO L226 Difference]: Without dead ends: 35 [2024-11-14 03:54:44,667 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:54:44,668 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:54:44,668 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 16 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:54:44,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-14 03:54:44,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2024-11-14 03:54:44,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:54:44,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2024-11-14 03:54:44,672 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 4 [2024-11-14 03:54:44,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:54:44,672 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2024-11-14 03:54:44,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:54:44,673 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2024-11-14 03:54:44,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 03:54:44,673 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:54:44,673 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 03:54:44,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 03:54:44,674 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:54:44,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:54:44,674 INFO L85 PathProgramCache]: Analyzing trace with hash 90820908, now seen corresponding path program 1 times [2024-11-14 03:54:44,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:54:44,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411758769] [2024-11-14 03:54:44,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:54:44,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:54:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:54:44,805 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 03:54:44,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:54:44,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411758769] [2024-11-14 03:54:44,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411758769] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:54:44,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:54:44,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:54:44,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96422444] [2024-11-14 03:54:44,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:54:44,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:54:44,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:54:44,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:54:44,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:54:44,807 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:54:44,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:54:44,875 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2024-11-14 03:54:44,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:54:44,876 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-14 03:54:44,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:54:44,876 INFO L225 Difference]: With dead ends: 21 [2024-11-14 03:54:44,876 INFO L226 Difference]: Without dead ends: 21 [2024-11-14 03:54:44,876 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:54:44,877 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:54:44,877 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 12 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:54:44,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-14 03:54:44,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-14 03:54:44,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:54:44,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-11-14 03:54:44,888 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 5 [2024-11-14 03:54:44,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:54:44,888 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-11-14 03:54:44,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:54:44,889 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-11-14 03:54:44,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 03:54:44,890 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:54:44,890 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 03:54:44,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 03:54:44,891 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:54:44,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:54:44,891 INFO L85 PathProgramCache]: Analyzing trace with hash 90820909, now seen corresponding path program 1 times [2024-11-14 03:54:44,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:54:44,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143279273] [2024-11-14 03:54:44,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:54:44,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:54:44,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:54:45,134 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 03:54:45,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:54:45,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143279273] [2024-11-14 03:54:45,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143279273] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:54:45,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:54:45,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:54:45,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899427969] [2024-11-14 03:54:45,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:54:45,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:54:45,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:54:45,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:54:45,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:54:45,139 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:54:45,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:54:45,214 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2024-11-14 03:54:45,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:54:45,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-14 03:54:45,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:54:45,216 INFO L225 Difference]: With dead ends: 22 [2024-11-14 03:54:45,216 INFO L226 Difference]: Without dead ends: 22 [2024-11-14 03:54:45,216 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:54:45,217 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:54:45,217 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 12 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:54:45,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-14 03:54:45,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-14 03:54:45,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:54:45,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2024-11-14 03:54:45,223 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 5 [2024-11-14 03:54:45,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:54:45,224 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2024-11-14 03:54:45,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:54:45,224 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2024-11-14 03:54:45,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 03:54:45,225 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:54:45,225 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-14 03:54:45,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 03:54:45,225 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:54:45,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:54:45,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1379593373, now seen corresponding path program 1 times [2024-11-14 03:54:45,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:54:45,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608848854] [2024-11-14 03:54:45,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:54:45,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:54:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:54:45,358 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 03:54:45,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:54:45,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608848854] [2024-11-14 03:54:45,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608848854] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:54:45,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262343446] [2024-11-14 03:54:45,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:54:45,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:54:45,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:54:45,364 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:54:45,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:54:45,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:54:45,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 03:54:45,452 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:54:45,501 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 03:54:45,501 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:54:45,561 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 03:54:45,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262343446] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:54:45,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1222473607] [2024-11-14 03:54:45,596 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 03:54:45,596 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:54:45,602 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:54:45,607 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:54:45,608 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:54:46,440 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:54:47,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1222473607] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:54:47,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:54:47,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 9 [2024-11-14 03:54:47,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258593032] [2024-11-14 03:54:47,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:54:47,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:54:47,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:54:47,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:54:47,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-14 03:54:47,475 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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 03:54:47,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:54:47,573 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2024-11-14 03:54:47,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:54:47,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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 7 [2024-11-14 03:54:47,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:54:47,575 INFO L225 Difference]: With dead ends: 29 [2024-11-14 03:54:47,575 INFO L226 Difference]: Without dead ends: 29 [2024-11-14 03:54:47,575 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-14 03:54:47,576 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:54:47,576 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 13 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:54:47,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-14 03:54:47,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-11-14 03:54:47,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.55) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:54:47,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-14 03:54:47,580 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 7 [2024-11-14 03:54:47,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:54:47,580 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-14 03:54:47,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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 03:54:47,580 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-14 03:54:47,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 03:54:47,581 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:54:47,581 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:54:47,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:54:47,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:54:47,782 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:54:47,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:54:47,782 INFO L85 PathProgramCache]: Analyzing trace with hash 975462518, now seen corresponding path program 1 times [2024-11-14 03:54:47,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:54:47,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512379042] [2024-11-14 03:54:47,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:54:47,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:54:47,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:54:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:54:47,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:54:47,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512379042] [2024-11-14 03:54:47,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512379042] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:54:47,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:54:47,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:54:47,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856455080] [2024-11-14 03:54:47,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:54:47,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:54:47,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:54:47,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:54:47,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:54:47,847 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:54:47,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:54:47,873 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2024-11-14 03:54:47,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:54:47,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-14 03:54:47,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:54:47,875 INFO L225 Difference]: With dead ends: 25 [2024-11-14 03:54:47,875 INFO L226 Difference]: Without dead ends: 25 [2024-11-14 03:54:47,875 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:54:47,876 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:54:47,876 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 8 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:54:47,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-14 03:54:47,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-14 03:54:47,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.45) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states 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 03:54:47,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-11-14 03:54:47,879 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 10 [2024-11-14 03:54:47,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:54:47,879 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-11-14 03:54:47,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:54:47,879 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-11-14 03:54:47,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 03:54:47,880 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:54:47,880 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:54:47,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-14 03:54:47,880 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:54:47,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:54:47,881 INFO L85 PathProgramCache]: Analyzing trace with hash 975462519, now seen corresponding path program 1 times [2024-11-14 03:54:47,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:54:47,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309401658] [2024-11-14 03:54:47,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:54:47,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:54:47,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:54:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:54:47,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:54:47,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309401658] [2024-11-14 03:54:47,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309401658] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:54:47,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012088563] [2024-11-14 03:54:47,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:54:47,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:54:47,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:54:47,995 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:54:47,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:54:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:54:48,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 03:54:48,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:54:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:54:48,128 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:54:48,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:54:48,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012088563] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:54:48,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2101295299] [2024-11-14 03:54:48,181 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 03:54:48,181 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:54:48,181 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:54:48,182 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:54:48,182 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:54:50,130 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:54:50,242 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '429#true' at error location [2024-11-14 03:54:50,244 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:54:50,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:54:50,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 9 [2024-11-14 03:54:50,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255463165] [2024-11-14 03:54:50,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:54:50,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 03:54:50,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:54:50,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 03:54:50,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-11-14 03:54:50,251 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:54:50,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:54:50,568 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2024-11-14 03:54:50,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 03:54:50,569 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-14 03:54:50,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:54:50,571 INFO L225 Difference]: With dead ends: 35 [2024-11-14 03:54:50,571 INFO L226 Difference]: Without dead ends: 35 [2024-11-14 03:54:50,571 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2024-11-14 03:54:50,575 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 56 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:54:50,575 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 6 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:54:50,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-14 03:54:50,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2024-11-14 03:54:50,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.36) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:54:50,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-11-14 03:54:50,579 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 10 [2024-11-14 03:54:50,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:54:50,580 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-11-14 03:54:50,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:54:50,580 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-11-14 03:54:50,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 03:54:50,580 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:54:50,581 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:54:50,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 03:54:50,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:54:50,785 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:54:50,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:54:50,787 INFO L85 PathProgramCache]: Analyzing trace with hash -840522810, now seen corresponding path program 1 times [2024-11-14 03:54:50,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:54:50,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693954199] [2024-11-14 03:54:50,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:54:50,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:54:50,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:54:50,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:54:50,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:54:50,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693954199] [2024-11-14 03:54:50,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693954199] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:54:50,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350958832] [2024-11-14 03:54:50,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:54:50,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:54:50,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:54:50,941 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:54:50,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:54:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:54:51,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 03:54:51,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:54:51,306 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_29| Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_21| Int)) (and (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_29| 1) |v_ULTIMATE.start_main_~#mask~0#1.base_21|) 0) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_29| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_21| 0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_29|) 0))) is different from true [2024-11-14 03:54:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:54:51,307 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:54:51,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350958832] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:54:51,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:54:51,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2024-11-14 03:54:51,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239120084] [2024-11-14 03:54:51,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:54:51,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:54:51,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:54:51,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:54:51,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2024-11-14 03:54:51,309 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:54:51,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:54:51,350 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2024-11-14 03:54:51,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:54:51,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 15 [2024-11-14 03:54:51,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:54:51,351 INFO L225 Difference]: With dead ends: 31 [2024-11-14 03:54:51,351 INFO L226 Difference]: Without dead ends: 30 [2024-11-14 03:54:51,351 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2024-11-14 03:54:51,352 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:54:51,353 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 17 Unchecked, 0.0s Time] [2024-11-14 03:54:51,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-14 03:54:51,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-14 03:54:51,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:54:51,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-11-14 03:54:51,356 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 15 [2024-11-14 03:54:51,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:54:51,357 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-11-14 03:54:51,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:54:51,357 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-11-14 03:54:51,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 03:54:51,358 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:54:51,358 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2024-11-14 03:54:51,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 03:54:51,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:54:51,563 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:54:51,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:54:51,563 INFO L85 PathProgramCache]: Analyzing trace with hash -2145328483, now seen corresponding path program 1 times [2024-11-14 03:54:51,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:54:51,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132434605] [2024-11-14 03:54:51,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:54:51,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:54:51,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:54:51,718 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:54:51,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:54:51,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132434605] [2024-11-14 03:54:51,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132434605] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:54:51,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973634892] [2024-11-14 03:54:51,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:54:51,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:54:51,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:54:51,721 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:54:51,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:54:51,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:54:51,808 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 03:54:51,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:54:51,881 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:54:51,881 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:54:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:54:51,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973634892] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:54:51,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1125006134] [2024-11-14 03:54:51,931 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 03:54:51,931 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:54:51,931 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:54:51,932 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:54:51,932 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:54:53,478 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:54:53,566 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '786#(and (exists ((|v_ULTIMATE.start_foo_~i~0#1_78| Int)) (and (<= 33 (mod |v_ULTIMATE.start_foo_~i~0#1_78| 4294967296)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_78|))) (<= 0 (+ |ULTIMATE.start_foo_~size#1| 1)))' at error location [2024-11-14 03:54:53,566 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:54:53,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:54:53,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6, 3] total 9 [2024-11-14 03:54:53,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639539348] [2024-11-14 03:54:53,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:54:53,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 03:54:53,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:54:53,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 03:54:53,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-11-14 03:54:53,568 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:54:53,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:54:53,723 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2024-11-14 03:54:53,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 03:54:53,724 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-14 03:54:53,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:54:53,724 INFO L225 Difference]: With dead ends: 45 [2024-11-14 03:54:53,724 INFO L226 Difference]: Without dead ends: 45 [2024-11-14 03:54:53,725 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2024-11-14 03:54:53,725 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:54:53,725 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 15 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:54:53,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-14 03:54:53,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2024-11-14 03:54:53,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.375) internal successors, (44), 36 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 03:54:53,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2024-11-14 03:54:53,729 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 16 [2024-11-14 03:54:53,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:54:53,729 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2024-11-14 03:54:53,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:54:53,729 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2024-11-14 03:54:53,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 03:54:53,729 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:54:53,730 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:54:53,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 03:54:53,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 03:54:53,934 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:54:53,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:54:53,934 INFO L85 PathProgramCache]: Analyzing trace with hash -286411487, now seen corresponding path program 1 times [2024-11-14 03:54:53,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:54:53,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049731287] [2024-11-14 03:54:53,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:54:53,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:54:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:54:54,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:54:54,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:54:54,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049731287] [2024-11-14 03:54:54,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049731287] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:54:54,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980183977] [2024-11-14 03:54:54,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:54:54,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:54:54,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:54:54,024 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:54:54,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:54:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:54:54,096 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 03:54:54,099 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:54:54,230 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 [2024-11-14 03:54:54,277 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 15 treesize of output 7 [2024-11-14 03:54:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:54:54,294 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:54:54,353 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 14 treesize of output 12 [2024-11-14 03:54:54,359 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 18 treesize of output 16 [2024-11-14 03:54:54,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:54:54,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980183977] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:54:54,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1156443644] [2024-11-14 03:54:54,491 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 03:54:54,491 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:54:54,491 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:54:54,492 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:54:54,492 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:54:56,003 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:54:56,230 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '988#(and (exists ((|v_#valid_44| (Array Int Int)) (|v_ULTIMATE.start_main_~#mask~0#1.base_22| Int) (|v_ULTIMATE.start_main_~#b~0#1.base_30| Int)) (= (store (store |v_#valid_44| |v_ULTIMATE.start_main_~#b~0#1.base_30| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_22| 0) |#valid|)) (exists ((|v_ULTIMATE.start_main_~i~1#1_60| Int)) (and (<= 0 |v_ULTIMATE.start_main_~i~1#1_60|) (<= 32 (mod |v_ULTIMATE.start_main_~i~1#1_60| 4294967296)))) (exists ((|v_ULTIMATE.start_main_old_#valid#1_10| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_10| |#valid|))) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-14 03:54:56,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:54:56,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:54:56,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 9, 9] total 18 [2024-11-14 03:54:56,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870641133] [2024-11-14 03:54:56,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:54:56,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 03:54:56,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:54:56,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 03:54:56,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2024-11-14 03:54:56,232 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:54:56,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:54:56,453 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2024-11-14 03:54:56,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 03:54:56,454 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-14 03:54:56,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:54:56,454 INFO L225 Difference]: With dead ends: 61 [2024-11-14 03:54:56,454 INFO L226 Difference]: Without dead ends: 61 [2024-11-14 03:54:56,455 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2024-11-14 03:54:56,455 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 29 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:54:56,456 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 37 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:54:56,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-14 03:54:56,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 40. [2024-11-14 03:54:56,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 39 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 03:54:56,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2024-11-14 03:54:56,464 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 16 [2024-11-14 03:54:56,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:54:56,464 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2024-11-14 03:54:56,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:54:56,464 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2024-11-14 03:54:56,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 03:54:56,468 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:54:56,469 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1] [2024-11-14 03:54:56,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 03:54:56,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:54:56,669 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:54:56,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:54:56,670 INFO L85 PathProgramCache]: Analyzing trace with hash -2080673479, now seen corresponding path program 1 times [2024-11-14 03:54:56,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:54:56,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777364315] [2024-11-14 03:54:56,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:54:56,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:54:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:54:56,971 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 03:54:56,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:54:56,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777364315] [2024-11-14 03:54:56,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777364315] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:54:56,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000950037] [2024-11-14 03:54:56,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:54:56,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:54:56,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:54:56,975 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:54:56,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:54:57,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:54:57,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 03:54:57,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:54:57,064 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 [2024-11-14 03:54:57,196 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:54:57,197 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:54:57,317 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:54:57,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000950037] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:54:57,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [684007542] [2024-11-14 03:54:57,320 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 03:54:57,320 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:54:57,321 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:54:57,321 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:54:57,321 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:54:58,880 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:54:59,027 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1207#(exists ((|v_ULTIMATE.start_foo_~b#1.base_26| Int) (|v_ULTIMATE.start_foo_~i~0#1_128| Int) (|v_ULTIMATE.start_foo_~b#1.offset_25| Int)) (and (or (and (<= 0 |ULTIMATE.start_foo_~size#1|) (<= 1 |v_ULTIMATE.start_foo_~i~0#1_128|)) (and (<= 0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= 0 (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_128|))) (or (< (+ |v_ULTIMATE.start_foo_~b#1.offset_25| |v_ULTIMATE.start_foo_~i~0#1_128|) 0) (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_26|) (+ |v_ULTIMATE.start_foo_~b#1.offset_25| |v_ULTIMATE.start_foo_~i~0#1_128| 1)))))' at error location [2024-11-14 03:54:59,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:54:59,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:54:59,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-14 03:54:59,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104779041] [2024-11-14 03:54:59,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:54:59,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 03:54:59,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:54:59,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 03:54:59,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-11-14 03:54:59,030 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:54:59,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:54:59,268 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2024-11-14 03:54:59,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 03:54:59,269 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-14 03:54:59,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:54:59,269 INFO L225 Difference]: With dead ends: 49 [2024-11-14 03:54:59,269 INFO L226 Difference]: Without dead ends: 49 [2024-11-14 03:54:59,270 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2024-11-14 03:54:59,270 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 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 [2024-11-14 03:54:59,271 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:54:59,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-14 03:54:59,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2024-11-14 03:54:59,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 03:54:59,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2024-11-14 03:54:59,280 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 17 [2024-11-14 03:54:59,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:54:59,280 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2024-11-14 03:54:59,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:54:59,281 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2024-11-14 03:54:59,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-14 03:54:59,281 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:54:59,282 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1] [2024-11-14 03:54:59,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 03:54:59,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-14 03:54:59,482 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:54:59,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:54:59,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1927594049, now seen corresponding path program 1 times [2024-11-14 03:54:59,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:54:59,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058942620] [2024-11-14 03:54:59,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:54:59,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:54:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:54:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:54:59,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:54:59,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058942620] [2024-11-14 03:54:59,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058942620] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:54:59,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331458202] [2024-11-14 03:54:59,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:54:59,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:54:59,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:54:59,622 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:54:59,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:54:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:54:59,707 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 03:54:59,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:54:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:54:59,786 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:54:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:54:59,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331458202] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:54:59,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [709426490] [2024-11-14 03:54:59,843 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 03:54:59,844 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:54:59,844 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:54:59,845 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:54:59,845 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:55:00,924 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:55:00,972 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1432#(and (<= |ULTIMATE.start_main_#t~ret2#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~ret2#1|))' at error location [2024-11-14 03:55:00,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:55:00,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:55:00,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-14 03:55:00,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637022031] [2024-11-14 03:55:00,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:55:00,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 03:55:00,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:55:00,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 03:55:00,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-11-14 03:55:00,975 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 03:55:01,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:55:01,167 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2024-11-14 03:55:01,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 03:55:01,168 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-14 03:55:01,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:55:01,169 INFO L225 Difference]: With dead ends: 41 [2024-11-14 03:55:01,169 INFO L226 Difference]: Without dead ends: 41 [2024-11-14 03:55:01,169 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2024-11-14 03:55:01,170 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 31 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:55:01,170 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 4 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:55:01,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-14 03:55:01,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-11-14 03:55:01,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.25) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 03:55:01,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2024-11-14 03:55:01,176 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 19 [2024-11-14 03:55:01,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:55:01,177 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2024-11-14 03:55:01,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 03:55:01,177 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2024-11-14 03:55:01,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 03:55:01,178 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:55:01,178 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1] [2024-11-14 03:55:01,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 03:55:01,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 03:55:01,379 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:55:01,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:55:01,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1191378357, now seen corresponding path program 2 times [2024-11-14 03:55:01,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:55:01,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306312886] [2024-11-14 03:55:01,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:55:01,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:55:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:55:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 03:55:01,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:55:01,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306312886] [2024-11-14 03:55:01,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306312886] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:55:01,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854289323] [2024-11-14 03:55:01,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:55:01,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:55:01,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:55:01,673 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:55:01,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:55:01,756 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 03:55:01,756 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:55:01,757 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-14 03:55:01,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:55:01,775 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 [2024-11-14 03:55:01,785 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 [2024-11-14 03:55:01,794 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 03:55:01,980 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 03:55:01,980 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:55:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 03:55:02,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854289323] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:55:02,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1572277877] [2024-11-14 03:55:02,129 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 03:55:02,130 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:55:02,130 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:55:02,130 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:55:02,130 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:55:03,214 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:55:03,270 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1666#(and (<= |ULTIMATE.start_main_#t~ret2#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~ret2#1|))' at error location [2024-11-14 03:55:03,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:55:03,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:55:03,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 8 [2024-11-14 03:55:03,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021375657] [2024-11-14 03:55:03,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:55:03,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 03:55:03,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:55:03,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 03:55:03,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-14 03:55:03,272 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states 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 03:55:03,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:55:03,370 INFO L93 Difference]: Finished difference Result 97 states and 109 transitions. [2024-11-14 03:55:03,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:55:03,370 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-14 03:55:03,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:55:03,371 INFO L225 Difference]: With dead ends: 97 [2024-11-14 03:55:03,371 INFO L226 Difference]: Without dead ends: 97 [2024-11-14 03:55:03,371 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-11-14 03:55:03,372 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:55:03,374 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 31 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:55:03,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-14 03:55:03,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2024-11-14 03:55:03,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.2674418604651163) internal successors, (109), 90 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 03:55:03,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2024-11-14 03:55:03,385 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 22 [2024-11-14 03:55:03,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:55:03,386 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2024-11-14 03:55:03,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states 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 03:55:03,386 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2024-11-14 03:55:03,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-14 03:55:03,387 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:55:03,387 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1] [2024-11-14 03:55:03,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 03:55:03,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 03:55:03,592 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:55:03,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:55:03,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1307290327, now seen corresponding path program 2 times [2024-11-14 03:55:03,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:55:03,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352479731] [2024-11-14 03:55:03,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:55:03,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:55:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:55:03,832 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:55:03,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:55:03,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352479731] [2024-11-14 03:55:03,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352479731] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:55:03,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656463588] [2024-11-14 03:55:03,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:55:03,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:55:03,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:55:03,836 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:55:03,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:55:03,940 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 03:55:03,940 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:55:03,941 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 03:55:03,944 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:55:04,115 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-14 03:55:04,115 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:55:04,530 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-14 03:55:04,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656463588] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:55:04,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [896664698] [2024-11-14 03:55:04,532 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 03:55:04,532 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:55:04,532 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:55:04,532 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:55:04,532 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:55:06,103 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:55:06,233 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2023#(and (<= 0 (+ |ULTIMATE.start_foo_~size#1| 1)) (exists ((|v_ULTIMATE.start_foo_~i~0#1_208| Int)) (and (<= 33 (mod |v_ULTIMATE.start_foo_~i~0#1_208| 4294967296)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_208|))))' at error location [2024-11-14 03:55:06,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:55:06,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:55:06,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2024-11-14 03:55:06,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013808231] [2024-11-14 03:55:06,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:55:06,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 03:55:06,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:55:06,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 03:55:06,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2024-11-14 03:55:06,236 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:55:06,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:55:06,829 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2024-11-14 03:55:06,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 03:55:06,830 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-14 03:55:06,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:55:06,831 INFO L225 Difference]: With dead ends: 90 [2024-11-14 03:55:06,831 INFO L226 Difference]: Without dead ends: 90 [2024-11-14 03:55:06,832 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=271, Invalid=989, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 03:55:06,833 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:55:06,833 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 20 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:55:06,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-14 03:55:06,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2024-11-14 03:55:06,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 85 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 03:55:06,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 97 transitions. [2024-11-14 03:55:06,842 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 97 transitions. Word has length 25 [2024-11-14 03:55:06,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:55:06,843 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 97 transitions. [2024-11-14 03:55:06,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:55:06,843 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 97 transitions. [2024-11-14 03:55:06,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-14 03:55:06,845 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:55:06,845 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-14 03:55:06,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-14 03:55:07,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 03:55:07,050 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:55:07,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:55:07,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1083452954, now seen corresponding path program 1 times [2024-11-14 03:55:07,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:55:07,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957854288] [2024-11-14 03:55:07,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:55:07,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:55:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:55:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 03:55:07,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:55:07,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957854288] [2024-11-14 03:55:07,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957854288] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:55:07,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724193373] [2024-11-14 03:55:07,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:55:07,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:55:07,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:55:07,177 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:55:07,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 03:55:07,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:55:07,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 03:55:07,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:55:07,551 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 03:55:07,551 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:55:07,633 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 [2024-11-14 03:55:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 03:55:07,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724193373] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:55:07,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [240170093] [2024-11-14 03:55:07,749 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 03:55:07,749 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:55:07,749 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:55:07,750 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:55:07,750 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:55:08,918 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:55:09,065 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2228#true' at error location [2024-11-14 03:55:09,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:55:09,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:55:09,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2024-11-14 03:55:09,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747992497] [2024-11-14 03:55:09,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:55:09,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-14 03:55:09,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:55:09,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-14 03:55:09,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-11-14 03:55:09,067 INFO L87 Difference]: Start difference. First operand 86 states and 97 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:55:09,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:55:09,249 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2024-11-14 03:55:09,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 03:55:09,250 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-14 03:55:09,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:55:09,251 INFO L225 Difference]: With dead ends: 92 [2024-11-14 03:55:09,251 INFO L226 Difference]: Without dead ends: 92 [2024-11-14 03:55:09,251 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2024-11-14 03:55:09,252 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 85 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:55:09,252 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 34 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:55:09,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-14 03:55:09,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2024-11-14 03:55:09,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 88 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 03:55:09,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2024-11-14 03:55:09,261 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 28 [2024-11-14 03:55:09,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:55:09,262 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2024-11-14 03:55:09,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:55:09,262 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2024-11-14 03:55:09,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-14 03:55:09,263 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:55:09,263 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 3, 2, 2, 1, 1] [2024-11-14 03:55:09,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 03:55:09,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 03:55:09,463 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:55:09,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:55:09,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1768779681, now seen corresponding path program 2 times [2024-11-14 03:55:09,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:55:09,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020749847] [2024-11-14 03:55:09,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:55:09,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:55:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:55:09,696 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 30 proven. 113 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 03:55:09,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:55:09,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020749847] [2024-11-14 03:55:09,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020749847] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:55:09,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024985164] [2024-11-14 03:55:09,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:55:09,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:55:09,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:55:09,699 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:55:09,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 03:55:09,802 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 03:55:09,802 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:55:09,804 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-14 03:55:09,806 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:55:09,815 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 [2024-11-14 03:55:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-14 03:55:10,131 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:55:10,460 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-14 03:55:10,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024985164] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:55:10,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1862388365] [2024-11-14 03:55:10,462 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 03:55:10,462 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:55:10,462 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:55:10,462 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:55:10,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:55:11,588 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:55:11,787 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2845#(exists ((|v_ULTIMATE.start_foo_~b#1.offset_51| Int) (|v_ULTIMATE.start_foo_~b#1.base_52| Int) (|v_ULTIMATE.start_foo_~i~0#1_268| Int)) (and (or (< (+ |v_ULTIMATE.start_foo_~b#1.offset_51| |v_ULTIMATE.start_foo_~i~0#1_268|) 0) (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_52|) (+ |v_ULTIMATE.start_foo_~b#1.offset_51| |v_ULTIMATE.start_foo_~i~0#1_268| 1))) (or (and (<= 1 |v_ULTIMATE.start_foo_~i~0#1_268|) (<= 0 |ULTIMATE.start_foo_~size#1|)) (and (<= 0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_268|) (<= 0 (+ |ULTIMATE.start_foo_~size#1| 1))))))' at error location [2024-11-14 03:55:11,787 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:55:11,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:55:11,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 21 [2024-11-14 03:55:11,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563712692] [2024-11-14 03:55:11,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:55:11,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-14 03:55:11,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:55:11,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-14 03:55:11,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2024-11-14 03:55:11,790 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 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 03:55:12,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:55:12,937 INFO L93 Difference]: Finished difference Result 125 states and 151 transitions. [2024-11-14 03:55:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-14 03:55:12,938 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 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) Word has length 38 [2024-11-14 03:55:12,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:55:12,940 INFO L225 Difference]: With dead ends: 125 [2024-11-14 03:55:12,940 INFO L226 Difference]: Without dead ends: 125 [2024-11-14 03:55:12,941 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=578, Invalid=2074, Unknown=0, NotChecked=0, Total=2652 [2024-11-14 03:55:12,942 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 69 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:55:12,942 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 11 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:55:12,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-14 03:55:12,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2024-11-14 03:55:12,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.2542372881355932) internal successors, (148), 122 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:55:12,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 148 transitions. [2024-11-14 03:55:12,949 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 148 transitions. Word has length 38 [2024-11-14 03:55:12,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:55:12,949 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 148 transitions. [2024-11-14 03:55:12,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 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 03:55:12,950 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 148 transitions. [2024-11-14 03:55:12,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-14 03:55:12,951 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:55:12,951 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1] [2024-11-14 03:55:12,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 03:55:13,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 03:55:13,156 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:55:13,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:55:13,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1179290461, now seen corresponding path program 2 times [2024-11-14 03:55:13,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:55:13,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622165568] [2024-11-14 03:55:13,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:55:13,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:55:13,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:55:13,379 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 33 proven. 70 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 03:55:13,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:55:13,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622165568] [2024-11-14 03:55:13,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622165568] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:55:13,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737784039] [2024-11-14 03:55:13,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:55:13,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:55:13,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:55:13,382 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:55:13,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 03:55:13,481 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 03:55:13,481 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:55:13,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 03:55:13,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:55:13,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:55:13,497 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 03:55:13,504 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 03:55:13,727 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2024-11-14 03:55:13,727 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:55:13,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737784039] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:55:13,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:55:13,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 12 [2024-11-14 03:55:13,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699794759] [2024-11-14 03:55:13,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:55:13,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:55:13,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:55:13,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:55:13,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-14 03:55:13,729 INFO L87 Difference]: Start difference. First operand 123 states and 148 transitions. Second operand has 6 states, 5 states have (on average 3.0) 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) [2024-11-14 03:55:13,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:55:13,772 INFO L93 Difference]: Finished difference Result 121 states and 146 transitions. [2024-11-14 03:55:13,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:55:13,773 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) 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 43 [2024-11-14 03:55:13,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:55:13,773 INFO L225 Difference]: With dead ends: 121 [2024-11-14 03:55:13,773 INFO L226 Difference]: Without dead ends: 121 [2024-11-14 03:55:13,774 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-14 03:55:13,774 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 23 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:55:13,774 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 11 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:55:13,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-11-14 03:55:13,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2024-11-14 03:55:13,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 117 states have (on average 1.2393162393162394) internal successors, (145), 119 states have internal predecessors, (145), 0 states have call successors, (0), 0 states 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 03:55:13,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 145 transitions. [2024-11-14 03:55:13,779 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 145 transitions. Word has length 43 [2024-11-14 03:55:13,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:55:13,780 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 145 transitions. [2024-11-14 03:55:13,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) 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) [2024-11-14 03:55:13,780 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 145 transitions. [2024-11-14 03:55:13,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 03:55:13,781 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:55:13,781 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2024-11-14 03:55:13,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-14 03:55:13,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 03:55:13,990 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:55:13,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:55:13,990 INFO L85 PathProgramCache]: Analyzing trace with hash 590354281, now seen corresponding path program 2 times [2024-11-14 03:55:13,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:55:13,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575308030] [2024-11-14 03:55:13,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:55:13,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:55:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:55:14,239 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 50 proven. 53 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-14 03:55:14,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:55:14,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575308030] [2024-11-14 03:55:14,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575308030] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:55:14,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285617044] [2024-11-14 03:55:14,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:55:14,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:55:14,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:55:14,243 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:55:14,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 03:55:14,335 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-14 03:55:14,336 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:55:14,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 03:55:14,339 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:55:14,755 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_34| Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_23| Int) (v_DerPreprocessor_3 Int) (v_DerPreprocessor_2 Int)) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#mask~0#1.base_23|) 0) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_34| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_23| 0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_34|) 0) (= v_DerPreprocessor_2 (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_34| v_DerPreprocessor_2) |v_ULTIMATE.start_main_~#mask~0#1.base_23| v_DerPreprocessor_3) |v_ULTIMATE.start_main_~#b~0#1.base_34|)))) is different from true [2024-11-14 03:55:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2024-11-14 03:55:14,756 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:55:14,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285617044] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:55:14,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:55:14,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 11 [2024-11-14 03:55:14,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580584249] [2024-11-14 03:55:14,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:55:14,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:55:14,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:55:14,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:55:14,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=78, Unknown=1, NotChecked=18, Total=132 [2024-11-14 03:55:14,758 INFO L87 Difference]: Start difference. First operand 120 states and 145 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:55:14,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:55:14,810 INFO L93 Difference]: Finished difference Result 119 states and 144 transitions. [2024-11-14 03:55:14,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:55:14,810 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-14 03:55:14,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:55:14,811 INFO L225 Difference]: With dead ends: 119 [2024-11-14 03:55:14,811 INFO L226 Difference]: Without dead ends: 108 [2024-11-14 03:55:14,811 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=78, Unknown=1, NotChecked=18, Total=132 [2024-11-14 03:55:14,812 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:55:14,812 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2024-11-14 03:55:14,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-14 03:55:14,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2024-11-14 03:55:14,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 106 states have (on average 1.2358490566037736) internal successors, (131), 107 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 03:55:14,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 131 transitions. [2024-11-14 03:55:14,818 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 131 transitions. Word has length 46 [2024-11-14 03:55:14,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:55:14,819 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 131 transitions. [2024-11-14 03:55:14,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:55:14,819 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 131 transitions. [2024-11-14 03:55:14,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-14 03:55:14,823 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:55:14,823 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 1, 1] [2024-11-14 03:55:14,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 03:55:15,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:55:15,024 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:55:15,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:55:15,025 INFO L85 PathProgramCache]: Analyzing trace with hash 902543609, now seen corresponding path program 3 times [2024-11-14 03:55:15,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:55:15,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950714122] [2024-11-14 03:55:15,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:55:15,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:55:15,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:55:15,507 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 346 proven. 51 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2024-11-14 03:55:15,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:55:15,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950714122] [2024-11-14 03:55:15,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950714122] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:55:15,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620529445] [2024-11-14 03:55:15,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:55:15,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:55:15,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:55:15,511 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:55:15,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 03:55:15,681 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:55:15,681 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:55:15,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 03:55:15,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:55:15,848 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 284 proven. 70 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2024-11-14 03:55:15,850 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:55:16,039 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 284 proven. 70 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2024-11-14 03:55:16,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620529445] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:55:16,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [562707229] [2024-11-14 03:55:16,041 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 03:55:16,041 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:55:16,041 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:55:16,041 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:55:16,041 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:55:17,244 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:55:17,390 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4302#(and (exists ((|v_ULTIMATE.start_foo_~i~0#1_312| Int)) (and (<= 33 (mod |v_ULTIMATE.start_foo_~i~0#1_312| 4294967296)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_312|))) (<= 0 (+ |ULTIMATE.start_foo_~size#1| 1)))' at error location [2024-11-14 03:55:17,390 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:55:17,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:55:17,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 21 [2024-11-14 03:55:17,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619941440] [2024-11-14 03:55:17,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:55:17,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 03:55:17,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:55:17,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 03:55:17,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2024-11-14 03:55:17,392 INFO L87 Difference]: Start difference. First operand 108 states and 131 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 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) [2024-11-14 03:55:17,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:55:17,862 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2024-11-14 03:55:17,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 03:55:17,864 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2024-11-14 03:55:17,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:55:17,864 INFO L225 Difference]: With dead ends: 108 [2024-11-14 03:55:17,865 INFO L226 Difference]: Without dead ends: 108 [2024-11-14 03:55:17,865 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 175 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=327, Invalid=1155, Unknown=0, NotChecked=0, Total=1482 [2024-11-14 03:55:17,866 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:55:17,866 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 0 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:55:17,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-14 03:55:17,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2024-11-14 03:55:17,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 106 states have (on average 1.2075471698113207) internal successors, (128), 107 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 03:55:17,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 128 transitions. [2024-11-14 03:55:17,876 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 128 transitions. Word has length 64 [2024-11-14 03:55:17,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:55:17,876 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 128 transitions. [2024-11-14 03:55:17,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 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) [2024-11-14 03:55:17,877 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 128 transitions. [2024-11-14 03:55:17,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-14 03:55:17,878 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:55:17,878 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 5, 4, 4, 1, 1] [2024-11-14 03:55:17,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 03:55:18,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:55:18,078 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:55:18,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:55:18,079 INFO L85 PathProgramCache]: Analyzing trace with hash 368331537, now seen corresponding path program 4 times [2024-11-14 03:55:18,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:55:18,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138598957] [2024-11-14 03:55:18,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:55:18,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:55:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:55:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 300 proven. 214 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-11-14 03:55:18,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:55:18,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138598957] [2024-11-14 03:55:18,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138598957] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:55:18,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495493514] [2024-11-14 03:55:18,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:55:18,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:55:18,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:55:18,390 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:55:18,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 03:55:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:55:18,544 INFO L255 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 03:55:18,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:55:18,742 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 360 proven. 154 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-11-14 03:55:18,742 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:55:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 360 proven. 154 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-11-14 03:55:18,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495493514] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:55:18,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [254526416] [2024-11-14 03:55:18,901 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 03:55:18,901 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:55:18,901 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:55:18,901 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:55:18,902 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:55:20,021 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:55:20,099 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4981#(and (exists ((|v_ULTIMATE.start_foo_~i~0#1_359| Int)) (and (<= 0 |v_ULTIMATE.start_foo_~i~0#1_359|) (<= 33 (mod |v_ULTIMATE.start_foo_~i~0#1_359| 4294967296)))) (<= 0 (+ |ULTIMATE.start_foo_~size#1| 1)))' at error location [2024-11-14 03:55:20,100 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:55:20,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:55:20,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2024-11-14 03:55:20,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091729722] [2024-11-14 03:55:20,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:55:20,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-14 03:55:20,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:55:20,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-14 03:55:20,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2024-11-14 03:55:20,101 INFO L87 Difference]: Start difference. First operand 108 states and 128 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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) [2024-11-14 03:55:20,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:55:20,411 INFO L93 Difference]: Finished difference Result 108 states and 126 transitions. [2024-11-14 03:55:20,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 03:55:20,411 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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) Word has length 70 [2024-11-14 03:55:20,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:55:20,412 INFO L225 Difference]: With dead ends: 108 [2024-11-14 03:55:20,412 INFO L226 Difference]: Without dead ends: 108 [2024-11-14 03:55:20,412 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 190 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=1101, Unknown=0, NotChecked=0, Total=1406 [2024-11-14 03:55:20,413 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:55:20,413 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 0 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:55:20,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-14 03:55:20,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2024-11-14 03:55:20,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 106 states have (on average 1.1886792452830188) internal successors, (126), 107 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 03:55:20,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 126 transitions. [2024-11-14 03:55:20,417 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 126 transitions. Word has length 70 [2024-11-14 03:55:20,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:55:20,417 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 126 transitions. [2024-11-14 03:55:20,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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) [2024-11-14 03:55:20,417 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 126 transitions. [2024-11-14 03:55:20,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-14 03:55:20,418 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:55:20,418 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 19, 4, 3, 3, 1, 1] [2024-11-14 03:55:20,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-14 03:55:20,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-14 03:55:20,622 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:55:20,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:55:20,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1792298439, now seen corresponding path program 3 times [2024-11-14 03:55:20,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:55:20,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403330826] [2024-11-14 03:55:20,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:55:20,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:55:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:55:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 155 proven. 448 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-14 03:55:21,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:55:21,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403330826] [2024-11-14 03:55:21,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403330826] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:55:21,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909920423] [2024-11-14 03:55:21,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:55:21,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:55:21,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:55:21,082 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:55:21,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 03:55:21,281 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:55:21,281 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:55:21,284 INFO L255 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 03:55:21,286 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:55:21,747 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 183 proven. 420 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-14 03:55:21,747 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:55:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 183 proven. 420 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-14 03:55:22,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909920423] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:55:22,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [341010834] [2024-11-14 03:55:22,070 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 03:55:22,070 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:55:22,071 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:55:22,071 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:55:22,071 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:55:23,043 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:55:23,315 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5690#(exists ((|v_ULTIMATE.start_foo_~b#1.base_81| Int) (|v_ULTIMATE.start_foo_~b#1.offset_80| Int) (|v_ULTIMATE.start_foo_~i~0#1_411| Int)) (and (or (< (+ |v_ULTIMATE.start_foo_~b#1.offset_80| |v_ULTIMATE.start_foo_~i~0#1_411|) 0) (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_81|) (+ |v_ULTIMATE.start_foo_~b#1.offset_80| |v_ULTIMATE.start_foo_~i~0#1_411| 1))) (or (and (<= 0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_411|) (<= 0 (+ |ULTIMATE.start_foo_~size#1| 1))) (and (<= 0 |ULTIMATE.start_foo_~size#1|) (<= 1 |v_ULTIMATE.start_foo_~i~0#1_411|)))))' at error location [2024-11-14 03:55:23,315 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:55:23,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:55:23,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2024-11-14 03:55:23,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539446352] [2024-11-14 03:55:23,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:55:23,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-14 03:55:23,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:55:23,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-14 03:55:23,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=430, Invalid=1376, Unknown=0, NotChecked=0, Total=1806 [2024-11-14 03:55:23,318 INFO L87 Difference]: Start difference. First operand 108 states and 126 transitions. Second operand has 38 states, 38 states have (on average 3.263157894736842) internal successors, (124), 37 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 03:55:25,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:55:25,036 INFO L93 Difference]: Finished difference Result 210 states and 245 transitions. [2024-11-14 03:55:25,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-14 03:55:25,037 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.263157894736842) internal successors, (124), 37 states have internal predecessors, (124), 0 states have call successors, (0), 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 71 [2024-11-14 03:55:25,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:55:25,038 INFO L225 Difference]: With dead ends: 210 [2024-11-14 03:55:25,038 INFO L226 Difference]: Without dead ends: 210 [2024-11-14 03:55:25,043 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 181 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3725 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2343, Invalid=7359, Unknown=0, NotChecked=0, Total=9702 [2024-11-14 03:55:25,045 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 17 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:55:25,045 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 10 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:55:25,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2024-11-14 03:55:25,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 205. [2024-11-14 03:55:25,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 203 states have (on average 1.2019704433497538) internal successors, (244), 204 states have internal predecessors, (244), 0 states have call successors, (0), 0 states 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 03:55:25,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 244 transitions. [2024-11-14 03:55:25,053 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 244 transitions. Word has length 71 [2024-11-14 03:55:25,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:55:25,053 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 244 transitions. [2024-11-14 03:55:25,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.263157894736842) internal successors, (124), 37 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 03:55:25,054 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 244 transitions. [2024-11-14 03:55:25,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-14 03:55:25,055 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:55:25,055 INFO L215 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 4, 4, 1, 1] [2024-11-14 03:55:25,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-14 03:55:25,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-14 03:55:25,259 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:55:25,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:55:25,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1214741475, now seen corresponding path program 5 times [2024-11-14 03:55:25,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:55:25,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968658688] [2024-11-14 03:55:25,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:55:25,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:55:25,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:55:25,509 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 262 proven. 40 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-11-14 03:55:25,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:55:25,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968658688] [2024-11-14 03:55:25,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968658688] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:55:25,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74833406] [2024-11-14 03:55:25,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:55:25,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:55:25,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:55:25,512 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:55:25,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 03:55:25,663 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 03:55:25,663 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:55:25,666 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 03:55:25,668 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:55:25,677 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 03:55:25,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:55:25,685 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 03:55:26,044 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2024-11-14 03:55:26,045 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:55:26,708 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2024-11-14 03:55:26,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74833406] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:55:26,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1340843646] [2024-11-14 03:55:26,710 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 03:55:26,710 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:55:26,710 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:55:26,710 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:55:26,710 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:55:27,798 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:55:27,941 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6668#(and (exists ((|v_ULTIMATE.start_foo_~i~0#1_455| Int)) (and (<= 33 (mod |v_ULTIMATE.start_foo_~i~0#1_455| 4294967296)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_455|))) (<= 0 (+ |ULTIMATE.start_foo_~size#1| 1)))' at error location [2024-11-14 03:55:27,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:55:27,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:55:27,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3, 3] total 13 [2024-11-14 03:55:27,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307838103] [2024-11-14 03:55:27,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:55:27,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 03:55:27,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:55:27,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 03:55:27,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2024-11-14 03:55:27,944 INFO L87 Difference]: Start difference. First operand 205 states and 244 transitions. Second operand has 14 states, 13 states have (on average 4.076923076923077) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:55:28,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:55:28,201 INFO L93 Difference]: Finished difference Result 204 states and 224 transitions. [2024-11-14 03:55:28,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 03:55:28,202 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.076923076923077) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2024-11-14 03:55:28,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:55:28,203 INFO L225 Difference]: With dead ends: 204 [2024-11-14 03:55:28,204 INFO L226 Difference]: Without dead ends: 204 [2024-11-14 03:55:28,204 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2024-11-14 03:55:28,205 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 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 [2024-11-14 03:55:28,206 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:55:28,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-11-14 03:55:28,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2024-11-14 03:55:28,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.103448275862069) internal successors, (224), 203 states have internal predecessors, (224), 0 states have call successors, (0), 0 states 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 03:55:28,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 224 transitions. [2024-11-14 03:55:28,215 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 224 transitions. Word has length 73 [2024-11-14 03:55:28,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:55:28,215 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 224 transitions. [2024-11-14 03:55:28,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.076923076923077) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:55:28,216 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 224 transitions. [2024-11-14 03:55:28,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-11-14 03:55:28,217 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:55:28,218 INFO L215 NwaCegarLoop]: trace histogram [45, 45, 44, 9, 8, 8, 1, 1] [2024-11-14 03:55:28,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-14 03:55:28,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:55:28,418 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:55:28,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:55:28,419 INFO L85 PathProgramCache]: Analyzing trace with hash -383458307, now seen corresponding path program 4 times [2024-11-14 03:55:28,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:55:28,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922971871] [2024-11-14 03:55:28,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:55:28,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:55:28,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:55:29,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 2090 proven. 144 refuted. 0 times theorem prover too weak. 1188 trivial. 0 not checked. [2024-11-14 03:55:29,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:55:29,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922971871] [2024-11-14 03:55:29,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922971871] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:55:29,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871991123] [2024-11-14 03:55:29,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:55:29,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:55:29,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:55:29,147 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:55:29,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 03:55:29,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:55:29,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 03:55:29,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:55:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 1997 proven. 283 refuted. 0 times theorem prover too weak. 1142 trivial. 0 not checked. [2024-11-14 03:55:29,727 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:55:29,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 1997 proven. 283 refuted. 0 times theorem prover too weak. 1142 trivial. 0 not checked. [2024-11-14 03:55:29,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871991123] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:55:29,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [320809982] [2024-11-14 03:55:29,939 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 03:55:29,939 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:55:29,940 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:55:29,940 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:55:29,940 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:55:30,818 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:55:31,098 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8080#(exists ((|v_ULTIMATE.start_foo_~b#1.base_110| Int) (|v_ULTIMATE.start_foo_~i~0#1_533| Int) (|v_ULTIMATE.start_foo_~b#1.offset_109| Int)) (and (or (< (+ |v_ULTIMATE.start_foo_~i~0#1_533| |v_ULTIMATE.start_foo_~b#1.offset_109|) 0) (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_110|) (+ |v_ULTIMATE.start_foo_~i~0#1_533| |v_ULTIMATE.start_foo_~b#1.offset_109| 1))) (or (and (<= 1 |v_ULTIMATE.start_foo_~i~0#1_533|) (<= 0 |ULTIMATE.start_foo_~size#1|)) (and (<= 0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_533|) (<= 0 (+ |ULTIMATE.start_foo_~size#1| 1))))))' at error location [2024-11-14 03:55:31,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:55:31,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:55:31,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 25 [2024-11-14 03:55:31,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548226305] [2024-11-14 03:55:31,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:55:31,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-14 03:55:31,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:55:31,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-14 03:55:31,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2024-11-14 03:55:31,101 INFO L87 Difference]: Start difference. First operand 204 states and 224 transitions. Second operand has 25 states, 25 states have (on average 3.64) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 03:55:32,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:55:32,047 INFO L93 Difference]: Finished difference Result 204 states and 219 transitions. [2024-11-14 03:55:32,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-14 03:55:32,048 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.64) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 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 161 [2024-11-14 03:55:32,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:55:32,049 INFO L225 Difference]: With dead ends: 204 [2024-11-14 03:55:32,049 INFO L226 Difference]: Without dead ends: 204 [2024-11-14 03:55:32,050 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 459 SyntacticMatches, 9 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=566, Invalid=2514, Unknown=0, NotChecked=0, Total=3080 [2024-11-14 03:55:32,050 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:55:32,051 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:55:32,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-11-14 03:55:32,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2024-11-14 03:55:32,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0788177339901477) internal successors, (219), 203 states have internal predecessors, (219), 0 states have call successors, (0), 0 states 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 03:55:32,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 219 transitions. [2024-11-14 03:55:32,059 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 219 transitions. Word has length 161 [2024-11-14 03:55:32,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:55:32,060 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 219 transitions. [2024-11-14 03:55:32,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.64) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 03:55:32,060 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 219 transitions. [2024-11-14 03:55:32,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2024-11-14 03:55:32,063 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:55:32,063 INFO L215 NwaCegarLoop]: trace histogram [49, 49, 48, 9, 8, 8, 1, 1] [2024-11-14 03:55:32,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-14 03:55:32,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:55:32,264 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:55:32,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:55:32,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1446864429, now seen corresponding path program 5 times [2024-11-14 03:55:32,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:55:32,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319149613] [2024-11-14 03:55:32,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:55:32,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:55:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:55:33,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4012 backedges. 2464 proven. 201 refuted. 0 times theorem prover too weak. 1347 trivial. 0 not checked. [2024-11-14 03:55:33,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:55:33,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319149613] [2024-11-14 03:55:33,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319149613] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:55:33,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567700314] [2024-11-14 03:55:33,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:55:33,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:55:33,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:55:33,336 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:55:33,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-14 03:55:33,617 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-14 03:55:33,617 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:55:33,621 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-14 03:55:33,628 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:55:33,636 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 [2024-11-14 03:55:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4012 backedges. 682 proven. 1413 refuted. 0 times theorem prover too weak. 1917 trivial. 0 not checked. [2024-11-14 03:55:34,781 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:55:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4012 backedges. 0 proven. 2095 refuted. 0 times theorem prover too weak. 1917 trivial. 0 not checked. [2024-11-14 03:55:36,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567700314] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:55:36,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1462887658] [2024-11-14 03:55:36,140 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 03:55:36,140 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:55:36,141 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:55:36,141 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:55:36,141 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:55:37,088 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:55:37,310 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9621#(exists ((|v_ULTIMATE.start_foo_~b#1.offset_128| Int) (|v_ULTIMATE.start_foo_~b#1.base_129| Int) (|v_ULTIMATE.start_foo_~i~0#1_617| Int)) (and (or (and (<= 0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= 0 (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_617|)) (and (<= 0 |ULTIMATE.start_foo_~size#1|) (<= 1 |v_ULTIMATE.start_foo_~i~0#1_617|))) (or (< (+ |v_ULTIMATE.start_foo_~i~0#1_617| |v_ULTIMATE.start_foo_~b#1.offset_128|) 0) (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_129|) (+ |v_ULTIMATE.start_foo_~i~0#1_617| |v_ULTIMATE.start_foo_~b#1.offset_128| 1)))))' at error location [2024-11-14 03:55:37,310 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:55:37,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:55:37,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 44 [2024-11-14 03:55:37,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207275797] [2024-11-14 03:55:37,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:55:37,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-14 03:55:37,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:55:37,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-14 03:55:37,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=2036, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 03:55:37,314 INFO L87 Difference]: Start difference. First operand 204 states and 219 transitions. Second operand has 44 states, 44 states have (on average 2.8636363636363638) internal successors, (126), 44 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 03:55:43,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:55:43,855 INFO L93 Difference]: Finished difference Result 317 states and 346 transitions. [2024-11-14 03:55:43,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-11-14 03:55:43,856 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.8636363636363638) internal successors, (126), 44 states have internal predecessors, (126), 0 states have call successors, (0), 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 173 [2024-11-14 03:55:43,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:55:43,858 INFO L225 Difference]: With dead ends: 317 [2024-11-14 03:55:43,858 INFO L226 Difference]: Without dead ends: 317 [2024-11-14 03:55:43,864 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5123 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=3522, Invalid=15110, Unknown=0, NotChecked=0, Total=18632 [2024-11-14 03:55:43,864 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 450 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:55:43,865 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 0 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:55:43,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2024-11-14 03:55:43,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 259. [2024-11-14 03:55:43,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.1046511627906976) internal successors, (285), 258 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 03:55:43,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 285 transitions. [2024-11-14 03:55:43,873 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 285 transitions. Word has length 173 [2024-11-14 03:55:43,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:55:43,874 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 285 transitions. [2024-11-14 03:55:43,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.8636363636363638) internal successors, (126), 44 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 03:55:43,874 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 285 transitions. [2024-11-14 03:55:43,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2024-11-14 03:55:43,877 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:55:43,877 INFO L215 NwaCegarLoop]: trace histogram [66, 66, 65, 10, 9, 9, 1, 1] [2024-11-14 03:55:43,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-14 03:55:44,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-14 03:55:44,082 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:55:44,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:55:44,082 INFO L85 PathProgramCache]: Analyzing trace with hash 599405393, now seen corresponding path program 6 times [2024-11-14 03:55:44,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:55:44,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118148705] [2024-11-14 03:55:44,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:55:44,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:55:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:55:45,459 INFO L134 CoverageAnalysis]: Checked inductivity of 7146 backedges. 4692 proven. 261 refuted. 0 times theorem prover too weak. 2193 trivial. 0 not checked. [2024-11-14 03:55:45,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:55:45,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118148705] [2024-11-14 03:55:45,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118148705] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:55:45,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619123817] [2024-11-14 03:55:45,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:55:45,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:55:45,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:55:45,462 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:55:45,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-14 03:55:46,261 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:55:46,261 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:55:46,270 INFO L255 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-14 03:55:46,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:55:47,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7146 backedges. 2316 proven. 4297 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2024-11-14 03:55:47,330 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:55:48,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7146 backedges. 2316 proven. 4297 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2024-11-14 03:55:48,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619123817] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:55:48,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [188884970] [2024-11-14 03:55:48,242 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 03:55:48,242 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:55:48,243 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:55:48,243 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:55:48,243 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:55:49,067 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:55:49,356 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11794#(exists ((|v_ULTIMATE.start_foo_~b#1.offset_149| Int) (|v_ULTIMATE.start_foo_~i~0#1_725| Int) (|v_ULTIMATE.start_foo_~b#1.base_150| Int)) (and (or (< (+ |v_ULTIMATE.start_foo_~i~0#1_725| |v_ULTIMATE.start_foo_~b#1.offset_149|) 0) (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_150|) (+ |v_ULTIMATE.start_foo_~i~0#1_725| |v_ULTIMATE.start_foo_~b#1.offset_149| 1))) (or (and (<= 1 |v_ULTIMATE.start_foo_~i~0#1_725|) (<= 0 |ULTIMATE.start_foo_~size#1|)) (and (<= 0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= 0 (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_725|)))))' at error location [2024-11-14 03:55:49,356 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:55:49,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:55:49,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 24] total 60 [2024-11-14 03:55:49,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545124826] [2024-11-14 03:55:49,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:55:49,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-14 03:55:49,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:55:49,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-14 03:55:49,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=3565, Unknown=0, NotChecked=0, Total=4160 [2024-11-14 03:55:49,360 INFO L87 Difference]: Start difference. First operand 259 states and 285 transitions. Second operand has 60 states, 60 states have (on average 3.5166666666666666) internal successors, (211), 60 states have internal predecessors, (211), 0 states have call successors, (0), 0 states 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 03:55:56,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:55:56,331 INFO L93 Difference]: Finished difference Result 398 states and 430 transitions. [2024-11-14 03:55:56,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2024-11-14 03:55:56,332 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.5166666666666666) internal successors, (211), 60 states have internal predecessors, (211), 0 states have call successors, (0), 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 227 [2024-11-14 03:55:56,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:55:56,334 INFO L225 Difference]: With dead ends: 398 [2024-11-14 03:55:56,334 INFO L226 Difference]: Without dead ends: 398 [2024-11-14 03:55:56,341 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 859 GetRequests, 630 SyntacticMatches, 6 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17022 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=6807, Invalid=43593, Unknown=0, NotChecked=0, Total=50400 [2024-11-14 03:55:56,342 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 293 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1486 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:55:56,342 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 0 Invalid, 1523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1486 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 03:55:56,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2024-11-14 03:55:56,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 397. [2024-11-14 03:55:56,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 1.0833333333333333) internal successors, (429), 396 states have internal predecessors, (429), 0 states have call successors, (0), 0 states 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 03:55:56,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 429 transitions. [2024-11-14 03:55:56,353 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 429 transitions. Word has length 227 [2024-11-14 03:55:56,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:55:56,353 INFO L471 AbstractCegarLoop]: Abstraction has 397 states and 429 transitions. [2024-11-14 03:55:56,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.5166666666666666) internal successors, (211), 60 states have internal predecessors, (211), 0 states have call successors, (0), 0 states 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 03:55:56,354 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 429 transitions. [2024-11-14 03:55:56,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2024-11-14 03:55:56,359 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:55:56,360 INFO L215 NwaCegarLoop]: trace histogram [100, 100, 99, 14, 13, 13, 1, 1] [2024-11-14 03:55:56,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-14 03:55:56,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:55:56,564 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:55:56,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:55:56,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1455012409, now seen corresponding path program 7 times [2024-11-14 03:55:56,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:55:56,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96000950] [2024-11-14 03:55:56,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:55:56,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:55:56,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:55:58,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16397 backedges. 9266 proven. 336 refuted. 0 times theorem prover too weak. 6795 trivial. 0 not checked. [2024-11-14 03:55:58,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:55:58,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96000950] [2024-11-14 03:55:58,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96000950] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:55:58,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093603821] [2024-11-14 03:55:58,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:55:58,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:55:58,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:55:58,649 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:55:58,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-14 03:55:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:55:59,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 1527 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 03:55:59,185 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:55:59,884 INFO L134 CoverageAnalysis]: Checked inductivity of 16397 backedges. 9967 proven. 1030 refuted. 0 times theorem prover too weak. 5400 trivial. 0 not checked. [2024-11-14 03:55:59,884 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:56:00,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16397 backedges. 9967 proven. 1030 refuted. 0 times theorem prover too weak. 5400 trivial. 0 not checked. [2024-11-14 03:56:00,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093603821] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:56:00,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2144972114] [2024-11-14 03:56:00,540 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 03:56:00,540 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:56:00,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:56:00,541 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:56:00,541 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:56:01,811 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:56:02,110 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15000#(exists ((|v_ULTIMATE.start_foo_~b#1.offset_178| Int) (|v_ULTIMATE.start_foo_~i~0#1_867| Int) (|v_ULTIMATE.start_foo_~b#1.base_179| Int)) (and (or (and (<= 1 |v_ULTIMATE.start_foo_~i~0#1_867|) (<= 0 |ULTIMATE.start_foo_~size#1|)) (and (<= 0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_867|) (<= 0 (+ |ULTIMATE.start_foo_~size#1| 1)))) (or (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_179|) (+ |v_ULTIMATE.start_foo_~i~0#1_867| |v_ULTIMATE.start_foo_~b#1.offset_178| 1)) (< (+ |v_ULTIMATE.start_foo_~i~0#1_867| |v_ULTIMATE.start_foo_~b#1.offset_178|) 0))))' at error location [2024-11-14 03:56:02,110 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:56:02,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:56:02,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 18] total 46 [2024-11-14 03:56:02,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163940007] [2024-11-14 03:56:02,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:56:02,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-14 03:56:02,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:02,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-14 03:56:02,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=2152, Unknown=0, NotChecked=0, Total=2550 [2024-11-14 03:56:02,114 INFO L87 Difference]: Start difference. First operand 397 states and 429 transitions. Second operand has 46 states, 46 states have (on average 3.5) internal successors, (161), 46 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 03:56:05,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:05,047 INFO L93 Difference]: Finished difference Result 397 states and 422 transitions. [2024-11-14 03:56:05,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-14 03:56:05,047 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.5) internal successors, (161), 46 states have internal predecessors, (161), 0 states have call successors, (0), 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 341 [2024-11-14 03:56:05,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:05,049 INFO L225 Difference]: With dead ends: 397 [2024-11-14 03:56:05,049 INFO L226 Difference]: Without dead ends: 397 [2024-11-14 03:56:05,050 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1096 GetRequests, 986 SyntacticMatches, 8 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2681 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2006, Invalid=8706, Unknown=0, NotChecked=0, Total=10712 [2024-11-14 03:56:05,051 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 46 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1802 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:05,051 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 0 Invalid, 1815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1802 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 03:56:05,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2024-11-14 03:56:05,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 397. [2024-11-14 03:56:05,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 1.0656565656565657) internal successors, (422), 396 states have internal predecessors, (422), 0 states have call successors, (0), 0 states 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 03:56:05,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 422 transitions. [2024-11-14 03:56:05,060 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 422 transitions. Word has length 341 [2024-11-14 03:56:05,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:05,060 INFO L471 AbstractCegarLoop]: Abstraction has 397 states and 422 transitions. [2024-11-14 03:56:05,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.5) internal successors, (161), 46 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 03:56:05,061 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 422 transitions. [2024-11-14 03:56:05,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2024-11-14 03:56:05,065 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:05,065 INFO L215 NwaCegarLoop]: trace histogram [105, 105, 104, 14, 13, 13, 1, 1] [2024-11-14 03:56:05,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-14 03:56:05,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-14 03:56:05,266 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:56:05,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:05,266 INFO L85 PathProgramCache]: Analyzing trace with hash -135414307, now seen corresponding path program 8 times [2024-11-14 03:56:05,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:05,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581072578] [2024-11-14 03:56:05,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:05,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:07,007 INFO L134 CoverageAnalysis]: Checked inductivity of 17992 backedges. 10201 proven. 426 refuted. 0 times theorem prover too weak. 7365 trivial. 0 not checked. [2024-11-14 03:56:07,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:07,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581072578] [2024-11-14 03:56:07,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581072578] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:56:07,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162864663] [2024-11-14 03:56:07,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:56:07,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:56:07,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:56:07,011 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:56:07,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-14 03:56:07,463 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-14 03:56:07,463 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:56:07,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 03:56:07,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:56:07,482 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 [2024-11-14 03:56:09,426 INFO L134 CoverageAnalysis]: Checked inductivity of 17992 backedges. 0 proven. 3410 refuted. 0 times theorem prover too weak. 14582 trivial. 0 not checked. [2024-11-14 03:56:09,426 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:56:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 17992 backedges. 0 proven. 3410 refuted. 0 times theorem prover too weak. 14582 trivial. 0 not checked. [2024-11-14 03:56:11,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162864663] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:56:11,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1162809175] [2024-11-14 03:56:11,840 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 03:56:11,840 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:56:11,840 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:56:11,840 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:56:11,840 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:56:12,780 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:56:13,109 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18082#(exists ((|v_ULTIMATE.start_foo_~b#1.offset_207| Int) (|v_ULTIMATE.start_foo_~b#1.base_208| Int) (|v_ULTIMATE.start_foo_~i~0#1_1014| Int)) (and (or (< (+ |v_ULTIMATE.start_foo_~b#1.offset_207| |v_ULTIMATE.start_foo_~i~0#1_1014|) 0) (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_208|) (+ |v_ULTIMATE.start_foo_~b#1.offset_207| |v_ULTIMATE.start_foo_~i~0#1_1014| 1))) (or (and (<= 0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_1014|) (<= 0 (+ |ULTIMATE.start_foo_~size#1| 1))) (and (<= 0 |ULTIMATE.start_foo_~size#1|) (<= 1 |v_ULTIMATE.start_foo_~i~0#1_1014|)))))' at error location [2024-11-14 03:56:13,109 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:56:13,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:56:13,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 47 [2024-11-14 03:56:13,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781328638] [2024-11-14 03:56:13,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:56:13,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-14 03:56:13,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:13,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-14 03:56:13,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=2266, Unknown=0, NotChecked=0, Total=2652 [2024-11-14 03:56:13,112 INFO L87 Difference]: Start difference. First operand 397 states and 422 transitions. Second operand has 47 states, 47 states have (on average 3.297872340425532) internal successors, (155), 47 states have internal predecessors, (155), 0 states have call successors, (0), 0 states 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 03:56:16,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:16,798 INFO L93 Difference]: Finished difference Result 449 states and 481 transitions. [2024-11-14 03:56:16,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-14 03:56:16,799 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.297872340425532) internal successors, (155), 47 states have internal predecessors, (155), 0 states have call successors, (0), 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 356 [2024-11-14 03:56:16,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:16,800 INFO L225 Difference]: With dead ends: 449 [2024-11-14 03:56:16,800 INFO L226 Difference]: Without dead ends: 449 [2024-11-14 03:56:16,802 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1147 GetRequests, 1040 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2655 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2261, Invalid=9511, Unknown=0, NotChecked=0, Total=11772 [2024-11-14 03:56:16,803 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 140 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:16,803 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 0 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:56:16,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2024-11-14 03:56:16,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 423. [2024-11-14 03:56:16,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 1.0592417061611374) internal successors, (447), 422 states have internal predecessors, (447), 0 states have call successors, (0), 0 states 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 03:56:16,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 447 transitions. [2024-11-14 03:56:16,813 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 447 transitions. Word has length 356 [2024-11-14 03:56:16,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:16,814 INFO L471 AbstractCegarLoop]: Abstraction has 423 states and 447 transitions. [2024-11-14 03:56:16,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.297872340425532) internal successors, (155), 47 states have internal predecessors, (155), 0 states have call successors, (0), 0 states 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 03:56:16,814 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 447 transitions. [2024-11-14 03:56:16,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2024-11-14 03:56:16,817 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:16,817 INFO L215 NwaCegarLoop]: trace histogram [121, 121, 120, 14, 13, 13, 1, 1] [2024-11-14 03:56:16,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-14 03:56:17,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-14 03:56:17,018 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:56:17,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:17,018 INFO L85 PathProgramCache]: Analyzing trace with hash -2020789075, now seen corresponding path program 9 times [2024-11-14 03:56:17,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:17,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042653088] [2024-11-14 03:56:17,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:17,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:17,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:19,155 INFO L134 CoverageAnalysis]: Checked inductivity of 23600 backedges. 14211 proven. 519 refuted. 0 times theorem prover too weak. 8870 trivial. 0 not checked. [2024-11-14 03:56:19,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:19,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042653088] [2024-11-14 03:56:19,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042653088] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:56:19,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296677476] [2024-11-14 03:56:19,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:56:19,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:56:19,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:56:19,159 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:56:19,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-14 03:56:21,226 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:56:21,226 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:56:21,236 INFO L255 TraceCheckSpWp]: Trace formula consists of 1758 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-14 03:56:21,243 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:56:22,414 INFO L134 CoverageAnalysis]: Checked inductivity of 23600 backedges. 18164 proven. 2560 refuted. 0 times theorem prover too weak. 2876 trivial. 0 not checked. [2024-11-14 03:56:22,421 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:56:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 23600 backedges. 18164 proven. 2560 refuted. 0 times theorem prover too weak. 2876 trivial. 0 not checked. [2024-11-14 03:56:23,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296677476] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:56:23,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [876069904] [2024-11-14 03:56:23,313 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 03:56:23,313 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:56:23,314 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:56:23,314 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:56:23,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:56:24,249 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:56:24,526 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21542#(exists ((|v_ULTIMATE.start_foo_~b#1.base_237| Int) (|v_ULTIMATE.start_foo_~b#1.offset_236| Int) (|v_ULTIMATE.start_foo_~i~0#1_1178| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_237|) (+ |v_ULTIMATE.start_foo_~b#1.offset_236| |v_ULTIMATE.start_foo_~i~0#1_1178| 1)) (< (+ |v_ULTIMATE.start_foo_~b#1.offset_236| |v_ULTIMATE.start_foo_~i~0#1_1178|) 0)) (or (and (<= 0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_1178|) (<= 0 (+ |ULTIMATE.start_foo_~size#1| 1))) (and (<= 0 |ULTIMATE.start_foo_~size#1|) (<= 1 |v_ULTIMATE.start_foo_~i~0#1_1178|)))))' at error location [2024-11-14 03:56:24,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:56:24,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:56:24,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 24] total 50 [2024-11-14 03:56:24,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328902637] [2024-11-14 03:56:24,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:56:24,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-14 03:56:24,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:24,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-14 03:56:24,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=2490, Unknown=0, NotChecked=0, Total=2970 [2024-11-14 03:56:24,529 INFO L87 Difference]: Start difference. First operand 423 states and 447 transitions. Second operand has 50 states, 50 states have (on average 3.88) internal successors, (194), 50 states have internal predecessors, (194), 0 states have call successors, (0), 0 states 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 03:56:30,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:30,182 INFO L93 Difference]: Finished difference Result 423 states and 435 transitions. [2024-11-14 03:56:30,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2024-11-14 03:56:30,182 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.88) internal successors, (194), 50 states have internal predecessors, (194), 0 states have call successors, (0), 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 404 [2024-11-14 03:56:30,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:30,184 INFO L225 Difference]: With dead ends: 423 [2024-11-14 03:56:30,184 INFO L226 Difference]: Without dead ends: 423 [2024-11-14 03:56:30,186 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1339 GetRequests, 1164 SyntacticMatches, 19 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7284 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4889, Invalid=19917, Unknown=0, NotChecked=0, Total=24806 [2024-11-14 03:56:30,187 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 62 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3075 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:30,187 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 0 Invalid, 3087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 3075 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-14 03:56:30,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2024-11-14 03:56:30,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 423. [2024-11-14 03:56:30,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 1.0308056872037914) internal successors, (435), 422 states have internal predecessors, (435), 0 states have call successors, (0), 0 states 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 03:56:30,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 435 transitions. [2024-11-14 03:56:30,197 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 435 transitions. Word has length 404 [2024-11-14 03:56:30,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:30,197 INFO L471 AbstractCegarLoop]: Abstraction has 423 states and 435 transitions. [2024-11-14 03:56:30,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.88) internal successors, (194), 50 states have internal predecessors, (194), 0 states have call successors, (0), 0 states 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 03:56:30,198 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 435 transitions. [2024-11-14 03:56:30,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2024-11-14 03:56:30,200 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:30,200 INFO L215 NwaCegarLoop]: trace histogram [127, 127, 126, 14, 13, 13, 1, 1] [2024-11-14 03:56:30,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-14 03:56:30,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-14 03:56:30,401 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:56:30,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:30,402 INFO L85 PathProgramCache]: Analyzing trace with hash -134922707, now seen corresponding path program 10 times [2024-11-14 03:56:30,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:30,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643048200] [2024-11-14 03:56:30,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:30,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:33,163 INFO L134 CoverageAnalysis]: Checked inductivity of 25901 backedges. 903 proven. 23529 refuted. 0 times theorem prover too weak. 1469 trivial. 0 not checked. [2024-11-14 03:56:33,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:33,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643048200] [2024-11-14 03:56:33,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643048200] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:56:33,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422211373] [2024-11-14 03:56:33,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:56:33,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:56:33,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:56:33,166 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:56:33,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-14 03:56:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:33,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-14 03:56:33,789 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:56:35,093 INFO L134 CoverageAnalysis]: Checked inductivity of 25901 backedges. 3165 proven. 21190 refuted. 0 times theorem prover too weak. 1546 trivial. 0 not checked. [2024-11-14 03:56:35,093 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:56:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 25901 backedges. 3165 proven. 21190 refuted. 0 times theorem prover too weak. 1546 trivial. 0 not checked. [2024-11-14 03:56:36,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422211373] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:56:36,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [385528083] [2024-11-14 03:56:36,096 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 03:56:36,096 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:56:36,096 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:56:36,096 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:56:36,096 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:56:36,935 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:56:37,253 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25181#(exists ((|v_ULTIMATE.start_foo_~b#1.offset_265| Int) (|v_ULTIMATE.start_foo_~b#1.base_266| Int) (|v_ULTIMATE.start_foo_~i~0#1_1352| Int)) (and (or (< (+ |v_ULTIMATE.start_foo_~b#1.offset_265| |v_ULTIMATE.start_foo_~i~0#1_1352|) 0) (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_266|) (+ |v_ULTIMATE.start_foo_~b#1.offset_265| |v_ULTIMATE.start_foo_~i~0#1_1352| 1))) (or (and (<= 0 |ULTIMATE.start_foo_~size#1|) (<= 1 |v_ULTIMATE.start_foo_~i~0#1_1352|)) (and (<= 0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= 0 (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_1352|)))))' at error location [2024-11-14 03:56:37,253 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:56:37,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:56:37,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 31, 31] total 55 [2024-11-14 03:56:37,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675334040] [2024-11-14 03:56:37,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:56:37,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-14 03:56:37,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:37,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-14 03:56:37,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=742, Invalid=2918, Unknown=0, NotChecked=0, Total=3660 [2024-11-14 03:56:37,256 INFO L87 Difference]: Start difference. First operand 423 states and 435 transitions. Second operand has 56 states, 56 states have (on average 3.625) internal successors, (203), 55 states have internal predecessors, (203), 0 states have call successors, (0), 0 states 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 03:56:41,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:41,913 INFO L93 Difference]: Finished difference Result 566 states and 583 transitions. [2024-11-14 03:56:41,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2024-11-14 03:56:41,913 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.625) internal successors, (203), 55 states have internal predecessors, (203), 0 states have call successors, (0), 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 422 [2024-11-14 03:56:41,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:41,916 INFO L225 Difference]: With dead ends: 566 [2024-11-14 03:56:41,916 INFO L226 Difference]: Without dead ends: 566 [2024-11-14 03:56:41,918 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1435 GetRequests, 1214 SyntacticMatches, 29 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14575 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=7203, Invalid=30239, Unknown=0, NotChecked=0, Total=37442 [2024-11-14 03:56:41,918 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 8 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:41,918 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 9 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1271 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 03:56:41,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2024-11-14 03:56:41,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 516. [2024-11-14 03:56:41,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 1.0310679611650486) internal successors, (531), 515 states have internal predecessors, (531), 0 states have call successors, (0), 0 states 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 03:56:41,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 531 transitions. [2024-11-14 03:56:41,928 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 531 transitions. Word has length 422 [2024-11-14 03:56:41,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:41,929 INFO L471 AbstractCegarLoop]: Abstraction has 516 states and 531 transitions. [2024-11-14 03:56:41,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.625) internal successors, (203), 55 states have internal predecessors, (203), 0 states have call successors, (0), 0 states 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 03:56:41,930 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 531 transitions. [2024-11-14 03:56:41,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2024-11-14 03:56:41,932 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:41,932 INFO L215 NwaCegarLoop]: trace histogram [140, 140, 139, 15, 14, 14, 1, 1] [2024-11-14 03:56:41,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-14 03:56:42,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:56:42,133 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:56:42,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:42,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1754428345, now seen corresponding path program 11 times [2024-11-14 03:56:42,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:42,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426959541] [2024-11-14 03:56:42,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:42,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:44,568 INFO L134 CoverageAnalysis]: Checked inductivity of 31437 backedges. 23531 proven. 4687 refuted. 0 times theorem prover too weak. 3219 trivial. 0 not checked. [2024-11-14 03:56:44,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:44,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426959541] [2024-11-14 03:56:44,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426959541] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:56:44,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425679096] [2024-11-14 03:56:44,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:56:44,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:56:44,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:56:44,571 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:56:44,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-14 03:56:45,296 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2024-11-14 03:56:45,296 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:56:45,302 INFO L255 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-14 03:56:45,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:56:45,316 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 [2024-11-14 03:56:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 31437 backedges. 4673 proven. 8726 refuted. 0 times theorem prover too weak. 18038 trivial. 0 not checked. [2024-11-14 03:56:48,340 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:56:52,158 INFO L134 CoverageAnalysis]: Checked inductivity of 31437 backedges. 0 proven. 13399 refuted. 0 times theorem prover too weak. 18038 trivial. 0 not checked. [2024-11-14 03:56:52,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425679096] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:56:52,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1485300791] [2024-11-14 03:56:52,159 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 03:56:52,160 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:56:52,160 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:56:52,160 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:56:52,160 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:56:53,179 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:56:53,454 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29383#(exists ((|v_ULTIMATE.start_foo_~b#1.offset_296| Int) (|v_ULTIMATE.start_foo_~b#1.base_297| Int) (|v_ULTIMATE.start_foo_~i~0#1_1541| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_297|) (+ |v_ULTIMATE.start_foo_~b#1.offset_296| |v_ULTIMATE.start_foo_~i~0#1_1541| 1)) (< (+ |v_ULTIMATE.start_foo_~b#1.offset_296| |v_ULTIMATE.start_foo_~i~0#1_1541|) 0)) (or (and (<= 1 |v_ULTIMATE.start_foo_~i~0#1_1541|) (<= 0 |ULTIMATE.start_foo_~size#1|)) (and (<= 0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_1541|) (<= 0 (+ |ULTIMATE.start_foo_~size#1| 1))))))' at error location [2024-11-14 03:56:53,454 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:56:53,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:56:53,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 21, 21] total 70 [2024-11-14 03:56:53,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729347742] [2024-11-14 03:56:53,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:56:53,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-14 03:56:53,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:53,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-14 03:56:53,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=4752, Unknown=0, NotChecked=0, Total=5700 [2024-11-14 03:56:53,457 INFO L87 Difference]: Start difference. First operand 516 states and 531 transitions. Second operand has 71 states, 71 states have (on average 3.3943661971830985) internal successors, (241), 70 states have internal predecessors, (241), 0 states have call successors, (0), 0 states 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 03:57:17,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:17,263 INFO L93 Difference]: Finished difference Result 729 states and 789 transitions. [2024-11-14 03:57:17,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2024-11-14 03:57:17,264 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.3943661971830985) internal successors, (241), 70 states have internal predecessors, (241), 0 states have call successors, (0), 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 464 [2024-11-14 03:57:17,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:17,266 INFO L225 Difference]: With dead ends: 729 [2024-11-14 03:57:17,267 INFO L226 Difference]: Without dead ends: 729 [2024-11-14 03:57:17,271 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1676 GetRequests, 1344 SyntacticMatches, 0 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36471 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=21342, Invalid=89880, Unknown=0, NotChecked=0, Total=111222 [2024-11-14 03:57:17,272 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 841 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1790 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:17,272 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [841 Valid, 0 Invalid, 1901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1790 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-14 03:57:17,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2024-11-14 03:57:17,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 682. [2024-11-14 03:57:17,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 1.0690161527165933) internal successors, (728), 681 states have internal predecessors, (728), 0 states have call successors, (0), 0 states 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 03:57:17,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 728 transitions. [2024-11-14 03:57:17,285 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 728 transitions. Word has length 464 [2024-11-14 03:57:17,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:17,286 INFO L471 AbstractCegarLoop]: Abstraction has 682 states and 728 transitions. [2024-11-14 03:57:17,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.3943661971830985) internal successors, (241), 70 states have internal predecessors, (241), 0 states have call successors, (0), 0 states 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 03:57:17,287 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 728 transitions. [2024-11-14 03:57:17,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2024-11-14 03:57:17,291 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:17,291 INFO L215 NwaCegarLoop]: trace histogram [187, 187, 186, 17, 16, 16, 1, 1] [2024-11-14 03:57:17,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-14 03:57:17,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-14 03:57:17,492 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:57:17,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:17,492 INFO L85 PathProgramCache]: Analyzing trace with hash 963000389, now seen corresponding path program 12 times [2024-11-14 03:57:17,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:17,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843896252] [2024-11-14 03:57:17,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:17,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:20,340 INFO L134 CoverageAnalysis]: Checked inductivity of 55541 backedges. 43896 proven. 5657 refuted. 0 times theorem prover too weak. 5988 trivial. 0 not checked. [2024-11-14 03:57:20,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:20,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843896252] [2024-11-14 03:57:20,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843896252] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:57:20,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944754480] [2024-11-14 03:57:20,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:57:20,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:57:20,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:57:20,343 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:57:20,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-14 03:57:25,128 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:57:25,128 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:57:25,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 2574 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-14 03:57:25,153 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:57:27,445 INFO L134 CoverageAnalysis]: Checked inductivity of 55541 backedges. 1087 proven. 50990 refuted. 0 times theorem prover too weak. 3464 trivial. 0 not checked. [2024-11-14 03:57:27,445 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:57:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 55541 backedges. 1087 proven. 50990 refuted. 0 times theorem prover too weak. 3464 trivial. 0 not checked. [2024-11-14 03:57:29,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944754480] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:57:29,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1996942148] [2024-11-14 03:57:29,789 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 03:57:29,790 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:57:29,790 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:57:29,790 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:57:29,790 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:57:30,494 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:57:30,858 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35075#(exists ((|v_ULTIMATE.start_foo_~i~0#1_1786| Int) (|v_ULTIMATE.start_foo_~b#1.offset_331| Int) (|v_ULTIMATE.start_foo_~b#1.base_332| Int)) (and (or (and (<= 0 |ULTIMATE.start_foo_~size#1|) (<= 1 |v_ULTIMATE.start_foo_~i~0#1_1786|)) (and (<= 0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_1786|) (<= 0 (+ |ULTIMATE.start_foo_~size#1| 1)))) (or (< (+ |v_ULTIMATE.start_foo_~b#1.offset_331| |v_ULTIMATE.start_foo_~i~0#1_1786|) 0) (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_332|) (+ |v_ULTIMATE.start_foo_~b#1.offset_331| |v_ULTIMATE.start_foo_~i~0#1_1786| 1)))))' at error location [2024-11-14 03:57:30,858 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:57:30,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:57:30,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 41, 41] total 99 [2024-11-14 03:57:30,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966769348] [2024-11-14 03:57:30,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:57:30,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2024-11-14 03:57:30,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:30,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2024-11-14 03:57:30,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1552, Invalid=9368, Unknown=0, NotChecked=0, Total=10920 [2024-11-14 03:57:30,862 INFO L87 Difference]: Start difference. First operand 682 states and 728 transitions. Second operand has 100 states, 100 states have (on average 3.97) internal successors, (397), 99 states have internal predecessors, (397), 0 states have call successors, (0), 0 states 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 03:57:49,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:49,126 INFO L93 Difference]: Finished difference Result 1007 states and 1065 transitions. [2024-11-14 03:57:49,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 313 states. [2024-11-14 03:57:49,126 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 3.97) internal successors, (397), 99 states have internal predecessors, (397), 0 states have call successors, (0), 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 611 [2024-11-14 03:57:49,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:49,130 INFO L225 Difference]: With dead ends: 1007 [2024-11-14 03:57:49,130 INFO L226 Difference]: Without dead ends: 1007 [2024-11-14 03:57:49,144 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2172 GetRequests, 1747 SyntacticMatches, 13 SemanticMatches, 412 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59532 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=19866, Invalid=151116, Unknown=0, NotChecked=0, Total=170982 [2024-11-14 03:57:49,145 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 496 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7062 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 7131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 7062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:49,145 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 4 Invalid, 7131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 7062 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-11-14 03:57:49,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2024-11-14 03:57:49,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 1006. [2024-11-14 03:57:49,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 1.0587064676616915) internal successors, (1064), 1005 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states 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 03:57:49,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1064 transitions. [2024-11-14 03:57:49,168 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1064 transitions. Word has length 611 [2024-11-14 03:57:49,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:49,169 INFO L471 AbstractCegarLoop]: Abstraction has 1006 states and 1064 transitions. [2024-11-14 03:57:49,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 3.97) internal successors, (397), 99 states have internal predecessors, (397), 0 states have call successors, (0), 0 states 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 03:57:49,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1064 transitions. [2024-11-14 03:57:49,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 921 [2024-11-14 03:57:49,178 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:49,179 INFO L215 NwaCegarLoop]: trace histogram [284, 284, 283, 23, 22, 22, 1, 1] [2024-11-14 03:57:49,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-14 03:57:49,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-14 03:57:49,379 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:57:49,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:49,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1652536031, now seen corresponding path program 13 times [2024-11-14 03:57:49,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:49,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378268113] [2024-11-14 03:57:49,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:49,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:49,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 127521 backedges. 58650 proven. 1266 refuted. 0 times theorem prover too weak. 67605 trivial. 0 not checked. [2024-11-14 03:57:55,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:55,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378268113] [2024-11-14 03:57:55,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378268113] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:57:55,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281877079] [2024-11-14 03:57:55,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:57:55,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:57:55,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:57:55,085 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:57:55,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-14 03:57:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:56,244 INFO L255 TraceCheckSpWp]: Trace formula consists of 3821 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-14 03:57:56,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:57:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 127521 backedges. 90911 proven. 7246 refuted. 0 times theorem prover too weak. 29364 trivial. 0 not checked. [2024-11-14 03:57:57,950 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:57:59,498 INFO L134 CoverageAnalysis]: Checked inductivity of 127521 backedges. 90911 proven. 7246 refuted. 0 times theorem prover too weak. 29364 trivial. 0 not checked. [2024-11-14 03:57:59,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281877079] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:57:59,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [382844351] [2024-11-14 03:57:59,501 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 03:57:59,501 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:57:59,502 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:57:59,502 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:57:59,502 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:58:00,823 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:58:01,134 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '43295#(exists ((|v_ULTIMATE.start_foo_~b#1.base_379| Int) (|v_ULTIMATE.start_foo_~b#1.offset_378| Int) (|v_ULTIMATE.start_foo_~i~0#1_2128| Int)) (and (or (< (+ |v_ULTIMATE.start_foo_~b#1.offset_378| |v_ULTIMATE.start_foo_~i~0#1_2128|) 0) (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_379|) (+ |v_ULTIMATE.start_foo_~b#1.offset_378| |v_ULTIMATE.start_foo_~i~0#1_2128| 1))) (or (and (<= 0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_2128|) (<= 0 (+ |ULTIMATE.start_foo_~size#1| 1))) (and (<= 0 |ULTIMATE.start_foo_~size#1|) (<= 1 |v_ULTIMATE.start_foo_~i~0#1_2128|)))))' at error location [2024-11-14 03:58:01,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:58:01,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:58:01,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 34, 34] total 70 [2024-11-14 03:58:01,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826707556] [2024-11-14 03:58:01,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:58:01,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-14 03:58:01,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:01,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-14 03:58:01,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=887, Invalid=4663, Unknown=0, NotChecked=0, Total=5550 [2024-11-14 03:58:01,148 INFO L87 Difference]: Start difference. First operand 1006 states and 1064 transitions. Second operand has 70 states, 70 states have (on average 3.7) internal successors, (259), 70 states have internal predecessors, (259), 0 states have call successors, (0), 0 states 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 03:58:15,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:15,065 INFO L93 Difference]: Finished difference Result 1006 states and 1056 transitions. [2024-11-14 03:58:15,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2024-11-14 03:58:15,066 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.7) internal successors, (259), 70 states have internal predecessors, (259), 0 states have call successors, (0), 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 920 [2024-11-14 03:58:15,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:15,074 INFO L225 Difference]: With dead ends: 1006 [2024-11-14 03:58:15,075 INFO L226 Difference]: Without dead ends: 1006 [2024-11-14 03:58:15,093 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2966 GetRequests, 2692 SyntacticMatches, 31 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18348 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=10576, Invalid=49204, Unknown=0, NotChecked=0, Total=59780 [2024-11-14 03:58:15,095 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 84 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5701 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 5701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:15,098 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 0 Invalid, 5718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 5701 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-11-14 03:58:15,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2024-11-14 03:58:15,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 1006. [2024-11-14 03:58:15,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 1.0507462686567164) internal successors, (1056), 1005 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states 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 03:58:15,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1056 transitions. [2024-11-14 03:58:15,194 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1056 transitions. Word has length 920 [2024-11-14 03:58:15,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:15,199 INFO L471 AbstractCegarLoop]: Abstraction has 1006 states and 1056 transitions. [2024-11-14 03:58:15,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.7) internal successors, (259), 70 states have internal predecessors, (259), 0 states have call successors, (0), 0 states 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 03:58:15,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1056 transitions. [2024-11-14 03:58:15,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 939 [2024-11-14 03:58:15,264 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:15,264 INFO L215 NwaCegarLoop]: trace histogram [290, 290, 289, 23, 22, 22, 1, 1] [2024-11-14 03:58:15,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-14 03:58:15,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-14 03:58:15,465 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:58:15,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:15,466 INFO L85 PathProgramCache]: Analyzing trace with hash 672027753, now seen corresponding path program 14 times [2024-11-14 03:58:15,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:15,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273999004] [2024-11-14 03:58:15,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:15,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:23,013 INFO L134 CoverageAnalysis]: Checked inductivity of 132810 backedges. 61307 proven. 1416 refuted. 0 times theorem prover too weak. 70087 trivial. 0 not checked. [2024-11-14 03:58:23,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:23,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273999004] [2024-11-14 03:58:23,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273999004] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:58:23,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363670500] [2024-11-14 03:58:23,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:58:23,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:23,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:58:23,016 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:58:23,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-14 03:58:24,768 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2024-11-14 03:58:24,768 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:58:24,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-14 03:58:24,791 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:58:24,806 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 [2024-11-14 03:58:30,432 INFO L134 CoverageAnalysis]: Checked inductivity of 132810 backedges. 0 proven. 19688 refuted. 0 times theorem prover too weak. 113122 trivial. 0 not checked. [2024-11-14 03:58:30,432 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:58:37,537 INFO L134 CoverageAnalysis]: Checked inductivity of 132810 backedges. 0 proven. 19688 refuted. 0 times theorem prover too weak. 113122 trivial. 0 not checked. [2024-11-14 03:58:37,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363670500] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:58:37,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [480383375] [2024-11-14 03:58:37,539 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 03:58:37,539 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:58:37,539 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:58:37,540 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:58:37,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:58:38,442 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:58:38,833 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '51362#(exists ((|v_ULTIMATE.start_foo_~i~0#1_2481| Int) (|v_ULTIMATE.start_foo_~b#1.offset_425| Int) (|v_ULTIMATE.start_foo_~b#1.base_426| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_426|) (+ |v_ULTIMATE.start_foo_~b#1.offset_425| |v_ULTIMATE.start_foo_~i~0#1_2481| 1)) (< (+ |v_ULTIMATE.start_foo_~b#1.offset_425| |v_ULTIMATE.start_foo_~i~0#1_2481|) 0)) (or (and (<= 0 |ULTIMATE.start_foo_~size#1|) (<= 1 |v_ULTIMATE.start_foo_~i~0#1_2481|)) (and (<= 0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_2481|) (<= 0 (+ |ULTIMATE.start_foo_~size#1| 1))))))' at error location [2024-11-14 03:58:38,834 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:58:38,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:58:38,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 24, 24] total 88 [2024-11-14 03:58:38,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648828510] [2024-11-14 03:58:38,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:58:38,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-11-14 03:58:38,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:58:38,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-11-14 03:58:38,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1368, Invalid=7188, Unknown=0, NotChecked=0, Total=8556 [2024-11-14 03:58:38,839 INFO L87 Difference]: Start difference. First operand 1006 states and 1056 transitions. Second operand has 88 states, 88 states have (on average 3.125) internal successors, (275), 88 states have internal predecessors, (275), 0 states have call successors, (0), 0 states 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 03:58:45,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:58:45,946 INFO L93 Difference]: Finished difference Result 1022 states and 1062 transitions. [2024-11-14 03:58:45,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2024-11-14 03:58:45,947 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.125) internal successors, (275), 88 states have internal predecessors, (275), 0 states have call successors, (0), 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 938 [2024-11-14 03:58:45,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:58:45,952 INFO L225 Difference]: With dead ends: 1022 [2024-11-14 03:58:45,953 INFO L226 Difference]: Without dead ends: 1022 [2024-11-14 03:58:45,957 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2938 GetRequests, 2761 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7702 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=5998, Invalid=25864, Unknown=0, NotChecked=0, Total=31862 [2024-11-14 03:58:45,959 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 214 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1458 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:58:45,961 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 0 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1458 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 03:58:45,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2024-11-14 03:58:45,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 1014. [2024-11-14 03:58:45,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 1013 states have (on average 1.0384995064165845) internal successors, (1052), 1013 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states 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 03:58:45,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 1052 transitions. [2024-11-14 03:58:45,988 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 1052 transitions. Word has length 938 [2024-11-14 03:58:45,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:58:45,991 INFO L471 AbstractCegarLoop]: Abstraction has 1014 states and 1052 transitions. [2024-11-14 03:58:45,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.125) internal successors, (275), 88 states have internal predecessors, (275), 0 states have call successors, (0), 0 states 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 03:58:45,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 1052 transitions. [2024-11-14 03:58:46,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 984 [2024-11-14 03:58:46,003 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:58:46,004 INFO L215 NwaCegarLoop]: trace histogram [305, 305, 304, 23, 22, 22, 1, 1] [2024-11-14 03:58:46,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-14 03:58:46,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-14 03:58:46,205 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:58:46,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:58:46,206 INFO L85 PathProgramCache]: Analyzing trace with hash 369770541, now seen corresponding path program 15 times [2024-11-14 03:58:46,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:58:46,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122593146] [2024-11-14 03:58:46,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:58:46,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:58:47,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:58:54,698 INFO L134 CoverageAnalysis]: Checked inductivity of 146505 backedges. 71203 proven. 1587 refuted. 0 times theorem prover too weak. 73715 trivial. 0 not checked. [2024-11-14 03:58:54,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:58:54,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122593146] [2024-11-14 03:58:54,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122593146] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:58:54,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248375545] [2024-11-14 03:58:54,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:58:54,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:58:54,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:58:54,701 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:58:54,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-14 03:59:11,915 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:59:11,915 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:59:11,956 INFO L255 TraceCheckSpWp]: Trace formula consists of 4052 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-14 03:59:11,968 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:59:14,300 INFO L134 CoverageAnalysis]: Checked inductivity of 146505 backedges. 112426 proven. 10150 refuted. 0 times theorem prover too weak. 23929 trivial. 0 not checked. [2024-11-14 03:59:14,300 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:59:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 146505 backedges. 112426 proven. 10150 refuted. 0 times theorem prover too weak. 23929 trivial. 0 not checked. [2024-11-14 03:59:16,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248375545] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:59:16,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [296706620] [2024-11-14 03:59:16,300 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 03:59:16,301 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:59:16,301 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:59:16,301 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:59:16,301 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:59:17,241 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:59:17,974 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '59545#(exists ((|v_ULTIMATE.start_foo_~i~0#1_2846| Int) (|v_ULTIMATE.start_foo_~b#1.offset_472| Int) (|v_ULTIMATE.start_foo_~b#1.base_473| Int)) (and (or (and (<= 0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_2846|) (<= 0 (+ |ULTIMATE.start_foo_~size#1| 1))) (and (<= 0 |ULTIMATE.start_foo_~size#1|) (<= 1 |v_ULTIMATE.start_foo_~i~0#1_2846|))) (or (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_473|) (+ |v_ULTIMATE.start_foo_~b#1.offset_472| |v_ULTIMATE.start_foo_~i~0#1_2846| 1)) (< (+ |v_ULTIMATE.start_foo_~b#1.offset_472| |v_ULTIMATE.start_foo_~i~0#1_2846|) 0))))' at error location [2024-11-14 03:59:17,974 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:59:17,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:59:17,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 38, 38] total 78 [2024-11-14 03:59:17,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971512812] [2024-11-14 03:59:17,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:59:17,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-11-14 03:59:17,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:59:17,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-11-14 03:59:17,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1084, Invalid=5722, Unknown=0, NotChecked=0, Total=6806 [2024-11-14 03:59:17,979 INFO L87 Difference]: Start difference. First operand 1014 states and 1052 transitions. Second operand has 78 states, 78 states have (on average 3.7051282051282053) internal successors, (289), 78 states have internal predecessors, (289), 0 states have call successors, (0), 0 states 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 03:59:35,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:59:35,348 INFO L93 Difference]: Finished difference Result 1014 states and 1046 transitions. [2024-11-14 03:59:35,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2024-11-14 03:59:35,349 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.7051282051282053) internal successors, (289), 78 states have internal predecessors, (289), 0 states have call successors, (0), 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 983 [2024-11-14 03:59:35,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:59:35,353 INFO L225 Difference]: With dead ends: 1014 [2024-11-14 03:59:35,353 INFO L226 Difference]: Without dead ends: 1014 [2024-11-14 03:59:35,358 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3198 GetRequests, 2873 SyntacticMatches, 35 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26077 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=14896, Invalid=70076, Unknown=0, NotChecked=0, Total=84972 [2024-11-14 03:59:35,359 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 93 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7503 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 7503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:59:35,360 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 0 Invalid, 7523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 7503 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2024-11-14 03:59:35,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2024-11-14 03:59:35,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 1014. [2024-11-14 03:59:35,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 1013 states have (on average 1.0325765054294176) internal successors, (1046), 1013 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states 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 03:59:35,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 1046 transitions. [2024-11-14 03:59:35,376 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 1046 transitions. Word has length 983 [2024-11-14 03:59:35,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:59:35,377 INFO L471 AbstractCegarLoop]: Abstraction has 1014 states and 1046 transitions. [2024-11-14 03:59:35,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.7051282051282053) internal successors, (289), 78 states have internal predecessors, (289), 0 states have call successors, (0), 0 states 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 03:59:35,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 1046 transitions. [2024-11-14 03:59:35,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 996 [2024-11-14 03:59:35,388 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:59:35,389 INFO L215 NwaCegarLoop]: trace histogram [309, 309, 308, 23, 22, 22, 1, 1] [2024-11-14 03:59:35,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-14 03:59:35,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:59:35,590 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 03:59:35,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:59:35,591 INFO L85 PathProgramCache]: Analyzing trace with hash -512528291, now seen corresponding path program 16 times [2024-11-14 03:59:35,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:59:35,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027028971] [2024-11-14 03:59:35,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:59:35,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:59:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:59:43,694 INFO L134 CoverageAnalysis]: Checked inductivity of 150271 backedges. 73524 proven. 1755 refuted. 0 times theorem prover too weak. 74992 trivial. 0 not checked. [2024-11-14 03:59:43,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:59:43,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027028971] [2024-11-14 03:59:43,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027028971] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:59:43,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864891089] [2024-11-14 03:59:43,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:59:43,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:59:43,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:59:43,696 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:59:43,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-14 03:59:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:59:45,054 INFO L255 TraceCheckSpWp]: Trace formula consists of 4096 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-14 03:59:45,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:59:47,630 INFO L134 CoverageAnalysis]: Checked inductivity of 150271 backedges. 119340 proven. 11854 refuted. 0 times theorem prover too weak. 19077 trivial. 0 not checked. [2024-11-14 03:59:47,630 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:59:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 150271 backedges. 119340 proven. 11854 refuted. 0 times theorem prover too weak. 19077 trivial. 0 not checked. [2024-11-14 03:59:50,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864891089] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:59:50,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [409939422] [2024-11-14 03:59:50,596 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 03:59:50,596 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:59:50,597 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:59:50,597 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:59:50,597 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:59:51,851 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:59:52,385 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '68061#(exists ((|v_ULTIMATE.start_foo_~i~0#1_3216| Int) (|v_ULTIMATE.start_foo_~b#1.offset_519| Int) (|v_ULTIMATE.start_foo_~b#1.base_520| Int)) (and (or (and (<= 1 |v_ULTIMATE.start_foo_~i~0#1_3216|) (<= 0 |ULTIMATE.start_foo_~size#1|)) (and (<= 0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_3216|) (<= 0 (+ |ULTIMATE.start_foo_~size#1| 1)))) (or (< (+ |v_ULTIMATE.start_foo_~b#1.offset_519| |v_ULTIMATE.start_foo_~i~0#1_3216|) 0) (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_520|) (+ |v_ULTIMATE.start_foo_~b#1.offset_519| |v_ULTIMATE.start_foo_~i~0#1_3216| 1)))))' at error location [2024-11-14 03:59:52,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:59:52,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:59:52,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 40, 40] total 101 [2024-11-14 03:59:52,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247876324] [2024-11-14 03:59:52,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:59:52,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-11-14 03:59:52,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:59:52,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-11-14 03:59:52,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1630, Invalid=9500, Unknown=0, NotChecked=0, Total=11130 [2024-11-14 03:59:52,391 INFO L87 Difference]: Start difference. First operand 1014 states and 1046 transitions. Second operand has 101 states, 101 states have (on average 3.5544554455445545) internal successors, (359), 101 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:15,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:00:15,901 INFO L93 Difference]: Finished difference Result 1014 states and 1041 transitions. [2024-11-14 04:00:15,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 251 states. [2024-11-14 04:00:15,902 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.5544554455445545) internal successors, (359), 101 states have internal predecessors, (359), 0 states have call successors, (0), 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 995 [2024-11-14 04:00:15,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:00:15,905 INFO L225 Difference]: With dead ends: 1014 [2024-11-14 04:00:15,905 INFO L226 Difference]: Without dead ends: 1014 [2024-11-14 04:00:15,910 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3256 GetRequests, 2904 SyntacticMatches, 19 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29994 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=19386, Invalid=92504, Unknown=0, NotChecked=0, Total=111890 [2024-11-14 04:00:15,911 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 91 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10305 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 10335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 10305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:00:15,912 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 0 Invalid, 10335 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [30 Valid, 10305 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2024-11-14 04:00:15,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2024-11-14 04:00:15,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 1014. [2024-11-14 04:00:15,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 1013 states have (on average 1.0276406712734452) internal successors, (1041), 1013 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:15,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 1041 transitions. [2024-11-14 04:00:15,923 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 1041 transitions. Word has length 995 [2024-11-14 04:00:15,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:00:15,923 INFO L471 AbstractCegarLoop]: Abstraction has 1014 states and 1041 transitions. [2024-11-14 04:00:15,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.5544554455445545) internal successors, (359), 101 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:00:15,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 1041 transitions. [2024-11-14 04:00:15,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1005 [2024-11-14 04:00:15,931 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:00:15,931 INFO L215 NwaCegarLoop]: trace histogram [312, 312, 311, 23, 22, 22, 1, 1] [2024-11-14 04:00:15,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-14 04:00:16,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:00:16,132 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 04:00:16,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:00:16,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1261169441, now seen corresponding path program 17 times [2024-11-14 04:00:16,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:00:16,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803040948] [2024-11-14 04:00:16,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:00:16,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:00:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:00:23,072 INFO L134 CoverageAnalysis]: Checked inductivity of 153127 backedges. 75554 proven. 1938 refuted. 0 times theorem prover too weak. 75635 trivial. 0 not checked. [2024-11-14 04:00:23,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:00:23,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803040948] [2024-11-14 04:00:23,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803040948] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:00:23,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793551933] [2024-11-14 04:00:23,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:00:23,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:00:23,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:00:23,077 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:00:23,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-14 04:00:26,272 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2024-11-14 04:00:26,272 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:00:26,286 INFO L255 TraceCheckSpWp]: Trace formula consists of 1479 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-14 04:00:26,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:00:26,311 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 [2024-11-14 04:00:33,016 INFO L134 CoverageAnalysis]: Checked inductivity of 153127 backedges. 35962 proven. 30854 refuted. 0 times theorem prover too weak. 86311 trivial. 0 not checked. [2024-11-14 04:00:33,016 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:00:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 153127 backedges. 0 proven. 66816 refuted. 0 times theorem prover too weak. 86311 trivial. 0 not checked. [2024-11-14 04:00:41,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793551933] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:00:41,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [152983684] [2024-11-14 04:00:41,131 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 04:00:41,131 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:00:41,132 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:00:41,132 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:00:41,132 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:00:42,038 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:00:42,385 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '76671#(exists ((|v_ULTIMATE.start_foo_~b#1.base_567| Int) (|v_ULTIMATE.start_foo_~i~0#1_3591| Int) (|v_ULTIMATE.start_foo_~b#1.offset_566| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_567|) (+ |v_ULTIMATE.start_foo_~b#1.offset_566| |v_ULTIMATE.start_foo_~i~0#1_3591| 1)) (< (+ |v_ULTIMATE.start_foo_~b#1.offset_566| |v_ULTIMATE.start_foo_~i~0#1_3591|) 0)) (or (and (<= 0 |ULTIMATE.start_foo_~size#1|) (<= 1 |v_ULTIMATE.start_foo_~i~0#1_3591|)) (and (<= 0 |v_ULTIMATE.start_foo_~i~0#1_3591|) (<= 0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= 0 (+ |ULTIMATE.start_foo_~size#1| 1))))))' at error location [2024-11-14 04:00:42,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:00:42,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:00:42,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 28, 28] total 101 [2024-11-14 04:00:42,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216460948] [2024-11-14 04:00:42,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:00:42,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-11-14 04:00:42,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:00:42,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-11-14 04:00:42,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1797, Invalid=9333, Unknown=0, NotChecked=0, Total=11130 [2024-11-14 04:00:42,389 INFO L87 Difference]: Start difference. First operand 1014 states and 1041 transitions. Second operand has 101 states, 101 states have (on average 3.0396039603960396) internal successors, (307), 101 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:01:08,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:01:08,396 INFO L93 Difference]: Finished difference Result 1313 states and 1371 transitions. [2024-11-14 04:01:08,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 241 states. [2024-11-14 04:01:08,397 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.0396039603960396) internal successors, (307), 101 states have internal predecessors, (307), 0 states have call successors, (0), 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 1004 [2024-11-14 04:01:08,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:01:08,401 INFO L225 Difference]: With dead ends: 1313 [2024-11-14 04:01:08,402 INFO L226 Difference]: Without dead ends: 1313 [2024-11-14 04:01:08,409 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3293 GetRequests, 2952 SyntacticMatches, 0 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36294 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=17876, Invalid=99430, Unknown=0, NotChecked=0, Total=117306 [2024-11-14 04:01:08,410 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 1080 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2579 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 2579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:01:08,411 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1080 Valid, 0 Invalid, 2764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 2579 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-14 04:01:08,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2024-11-14 04:01:08,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 1179. [2024-11-14 04:01:08,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1178 states have (on average 1.031409168081494) internal successors, (1215), 1178 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:01:08,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1215 transitions. [2024-11-14 04:01:08,426 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1215 transitions. Word has length 1004 [2024-11-14 04:01:08,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:01:08,426 INFO L471 AbstractCegarLoop]: Abstraction has 1179 states and 1215 transitions. [2024-11-14 04:01:08,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.0396039603960396) internal successors, (307), 101 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:01:08,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1215 transitions. [2024-11-14 04:01:08,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1176 [2024-11-14 04:01:08,440 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:01:08,440 INFO L215 NwaCegarLoop]: trace histogram [367, 367, 366, 25, 24, 24, 1, 1] [2024-11-14 04:01:08,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-14 04:01:08,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-14 04:01:08,641 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 04:01:08,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:01:08,642 INFO L85 PathProgramCache]: Analyzing trace with hash -54771331, now seen corresponding path program 18 times [2024-11-14 04:01:08,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:01:08,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307656350] [2024-11-14 04:01:08,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:01:08,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:01:09,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:01:16,583 INFO L134 CoverageAnalysis]: Checked inductivity of 211143 backedges. 111220 proven. 2136 refuted. 0 times theorem prover too weak. 97787 trivial. 0 not checked. [2024-11-14 04:01:16,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:01:16,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307656350] [2024-11-14 04:01:16,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307656350] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:01:16,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937905213] [2024-11-14 04:01:16,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:01:16,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:01:16,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:01:16,586 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:01:16,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-14 04:01:41,977 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:01:41,977 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:01:42,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 4794 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-14 04:01:42,031 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:01:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 211143 backedges. 2252 proven. 199887 refuted. 0 times theorem prover too weak. 9004 trivial. 0 not checked. [2024-11-14 04:01:47,272 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:01:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 211143 backedges. 2252 proven. 199887 refuted. 0 times theorem prover too weak. 9004 trivial. 0 not checked. [2024-11-14 04:01:53,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937905213] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:01:53,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1246231036] [2024-11-14 04:01:53,031 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 04:01:53,032 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:01:53,032 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:01:53,032 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:01:53,032 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:01:53,902 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:01:54,583 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '86831#(exists ((|v_ULTIMATE.start_foo_~i~0#1_4034| Int) (|v_ULTIMATE.start_foo_~b#1.base_618| Int) (|v_ULTIMATE.start_foo_~b#1.offset_617| Int)) (and (or (< (+ |v_ULTIMATE.start_foo_~b#1.offset_617| |v_ULTIMATE.start_foo_~i~0#1_4034|) 0) (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_618|) (+ |v_ULTIMATE.start_foo_~b#1.offset_617| |v_ULTIMATE.start_foo_~i~0#1_4034| 1))) (or (and (<= 1 |v_ULTIMATE.start_foo_~i~0#1_4034|) (<= 0 |ULTIMATE.start_foo_~size#1|)) (and (<= 0 |v_ULTIMATE.start_foo_~i~0#1_4034|) (<= 0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= 0 (+ |ULTIMATE.start_foo_~size#1| 1))))))' at error location [2024-11-14 04:01:54,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:01:54,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:01:54,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 59, 59] total 144 [2024-11-14 04:01:54,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299285282] [2024-11-14 04:01:54,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:01:54,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2024-11-14 04:01:54,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:01:54,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2024-11-14 04:01:54,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3017, Invalid=19035, Unknown=0, NotChecked=0, Total=22052 [2024-11-14 04:01:54,589 INFO L87 Difference]: Start difference. First operand 1179 states and 1215 transitions. Second operand has 144 states, 144 states have (on average 3.6319444444444446) internal successors, (523), 144 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:03,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:03:03,254 INFO L93 Difference]: Finished difference Result 2070 states and 2166 transitions. [2024-11-14 04:03:03,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 901 states. [2024-11-14 04:03:03,255 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 3.6319444444444446) internal successors, (523), 144 states have internal predecessors, (523), 0 states have call successors, (0), 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 1175 [2024-11-14 04:03:03,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:03:03,260 INFO L225 Difference]: With dead ends: 2070 [2024-11-14 04:03:03,260 INFO L226 Difference]: Without dead ends: 2070 [2024-11-14 04:03:03,311 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4448 GetRequests, 3404 SyntacticMatches, 19 SemanticMatches, 1025 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447504 ImplicationChecksByTransitivity, 70.6s TimeCoverageRelationStatistics Valid=92746, Invalid=960956, Unknown=0, NotChecked=0, Total=1053702 [2024-11-14 04:03:03,312 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 1022 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6158 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 6158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:03:03,313 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1022 Valid, 0 Invalid, 6286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 6158 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2024-11-14 04:03:03,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2024-11-14 04:03:03,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 2067. [2024-11-14 04:03:03,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2066 states have (on average 1.046950629235237) internal successors, (2163), 2066 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:03,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 2163 transitions. [2024-11-14 04:03:03,330 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 2163 transitions. Word has length 1175 [2024-11-14 04:03:03,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:03:03,331 INFO L471 AbstractCegarLoop]: Abstraction has 2067 states and 2163 transitions. [2024-11-14 04:03:03,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 3.6319444444444446) internal successors, (523), 144 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:03,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 2163 transitions. [2024-11-14 04:03:03,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1665 [2024-11-14 04:03:03,345 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:03:03,346 INFO L215 NwaCegarLoop]: trace histogram [523, 523, 522, 32, 31, 31, 1, 1] [2024-11-14 04:03:03,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-14 04:03:03,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-14 04:03:03,546 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 04:03:03,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:03:03,547 INFO L85 PathProgramCache]: Analyzing trace with hash 2130811541, now seen corresponding path program 19 times [2024-11-14 04:03:03,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:03:03,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613624574] [2024-11-14 04:03:03,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:03,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:03:05,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 427148 backedges. 179169 proven. 2331 refuted. 0 times theorem prover too weak. 245648 trivial. 0 not checked. [2024-11-14 04:03:20,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:03:20,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613624574] [2024-11-14 04:03:20,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613624574] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:03:20,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785348471] [2024-11-14 04:03:20,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:03:20,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:03:20,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:03:20,121 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:03:20,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-14 04:03:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:22,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 6720 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-14 04:03:22,216 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:03:25,285 INFO L134 CoverageAnalysis]: Checked inductivity of 427148 backedges. 308506 proven. 18082 refuted. 0 times theorem prover too weak. 100560 trivial. 0 not checked. [2024-11-14 04:03:25,286 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:03:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 427148 backedges. 308506 proven. 18082 refuted. 0 times theorem prover too weak. 100560 trivial. 0 not checked. [2024-11-14 04:03:28,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785348471] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:03:28,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [536925990] [2024-11-14 04:03:28,906 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 04:03:28,906 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:03:28,907 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:03:28,907 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:03:28,907 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:03:29,894 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:03:30,319 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '102823#(exists ((|v_ULTIMATE.start_foo_~b#1.offset_682| Int) (|v_ULTIMATE.start_foo_~b#1.base_683| Int) (|v_ULTIMATE.start_foo_~i~0#1_4630| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_683|) (+ |v_ULTIMATE.start_foo_~b#1.offset_682| |v_ULTIMATE.start_foo_~i~0#1_4630| 1)) (< (+ |v_ULTIMATE.start_foo_~b#1.offset_682| |v_ULTIMATE.start_foo_~i~0#1_4630|) 0)) (or (and (<= 0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_4630|) (<= 0 (+ |ULTIMATE.start_foo_~size#1| 1))) (and (<= 0 |ULTIMATE.start_foo_~size#1|) (<= 1 |v_ULTIMATE.start_foo_~i~0#1_4630|)))))' at error location [2024-11-14 04:03:30,319 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:03:30,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:03:30,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 46, 46] total 116 [2024-11-14 04:03:30,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960165174] [2024-11-14 04:03:30,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:03:30,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2024-11-14 04:03:30,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:03:30,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2024-11-14 04:03:30,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2113, Invalid=12407, Unknown=0, NotChecked=0, Total=14520 [2024-11-14 04:03:30,323 INFO L87 Difference]: Start difference. First operand 2067 states and 2163 transitions. Second operand has 116 states, 116 states have (on average 3.560344827586207) internal successors, (413), 116 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:04:03,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:04:03,893 INFO L93 Difference]: Finished difference Result 2067 states and 2149 transitions. [2024-11-14 04:04:03,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 323 states. [2024-11-14 04:04:03,893 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 3.560344827586207) internal successors, (413), 116 states have internal predecessors, (413), 0 states have call successors, (0), 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 1664 [2024-11-14 04:04:03,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:04:03,896 INFO L225 Difference]: With dead ends: 2067 [2024-11-14 04:04:03,896 INFO L226 Difference]: Without dead ends: 2067 [2024-11-14 04:04:03,908 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5338 GetRequests, 4899 SyntacticMatches, 22 SemanticMatches, 417 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47502 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=30118, Invalid=145024, Unknown=0, NotChecked=0, Total=175142 [2024-11-14 04:04:03,909 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 105 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15844 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 15878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 15844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:04:03,909 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 0 Invalid, 15878 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [34 Valid, 15844 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2024-11-14 04:04:03,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2024-11-14 04:04:03,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 2067. [2024-11-14 04:04:03,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2066 states have (on average 1.0401742497579864) internal successors, (2149), 2066 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:04:03,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 2149 transitions. [2024-11-14 04:04:03,925 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 2149 transitions. Word has length 1664 [2024-11-14 04:04:03,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:04:03,926 INFO L471 AbstractCegarLoop]: Abstraction has 2067 states and 2149 transitions. [2024-11-14 04:04:03,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 3.560344827586207) internal successors, (413), 116 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:04:03,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 2149 transitions. [2024-11-14 04:04:03,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1689 [2024-11-14 04:04:03,937 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:04:03,937 INFO L215 NwaCegarLoop]: trace histogram [531, 531, 530, 32, 31, 31, 1, 1] [2024-11-14 04:04:03,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-14 04:04:04,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-14 04:04:04,138 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 04:04:04,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:04:04,139 INFO L85 PathProgramCache]: Analyzing trace with hash -299057611, now seen corresponding path program 20 times [2024-11-14 04:04:04,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:04:04,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066294813] [2024-11-14 04:04:04,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:04:04,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:04:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:04:17,518 INFO L134 CoverageAnalysis]: Checked inductivity of 440032 backedges. 184724 proven. 2541 refuted. 0 times theorem prover too weak. 252767 trivial. 0 not checked. [2024-11-14 04:04:17,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:04:17,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066294813] [2024-11-14 04:04:17,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066294813] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:04:17,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978577533] [2024-11-14 04:04:17,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:04:17,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:04:17,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:04:17,521 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:04:17,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-14 04:04:27,733 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2024-11-14 04:04:27,733 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:04:27,759 INFO L255 TraceCheckSpWp]: Trace formula consists of 1787 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-14 04:04:27,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:04:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 440032 backedges. 93788 proven. 4466 refuted. 0 times theorem prover too weak. 341778 trivial. 0 not checked. [2024-11-14 04:04:32,550 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:04:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 440032 backedges. 93788 proven. 4466 refuted. 0 times theorem prover too weak. 341778 trivial. 0 not checked. [2024-11-14 04:04:40,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978577533] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:04:40,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1770250714] [2024-11-14 04:04:40,286 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 04:04:40,286 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:04:40,286 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:04:40,286 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:04:40,287 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:04:41,172 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:04:41,868 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '117864#(exists ((|v_ULTIMATE.start_foo_~b#1.base_688| Int) (|v_ULTIMATE.start_foo_~b#1.offset_687| Int) (|v_ULTIMATE.start_foo_~i~0#1_4778| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_688|) (+ |v_ULTIMATE.start_foo_~b#1.offset_687| |v_ULTIMATE.start_foo_~i~0#1_4778| 1)) (< (+ |v_ULTIMATE.start_foo_~b#1.offset_687| |v_ULTIMATE.start_foo_~i~0#1_4778|) 0)) (or (and (<= 0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_4778|) (<= 0 (+ |ULTIMATE.start_foo_~size#1| 1))) (and (<= 1 |v_ULTIMATE.start_foo_~i~0#1_4778|) (<= 0 |ULTIMATE.start_foo_~size#1|)))))' at error location [2024-11-14 04:04:41,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:04:41,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:04:41,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 69, 69] total 184 [2024-11-14 04:04:41,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344469497] [2024-11-14 04:04:41,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:04:41,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 184 states [2024-11-14 04:04:41,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:04:41,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2024-11-14 04:04:41,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4527, Invalid=31005, Unknown=0, NotChecked=0, Total=35532 [2024-11-14 04:04:41,874 INFO L87 Difference]: Start difference. First operand 2067 states and 2149 transitions. Second operand has 184 states, 184 states have (on average 2.9565217391304346) internal successors, (544), 184 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:04:52,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:04:52,836 INFO L93 Difference]: Finished difference Result 2274 states and 2360 transitions. [2024-11-14 04:04:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2024-11-14 04:04:52,837 INFO L78 Accepts]: Start accepts. Automaton has has 184 states, 184 states have (on average 2.9565217391304346) internal successors, (544), 184 states have internal predecessors, (544), 0 states have call successors, (0), 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 1688 [2024-11-14 04:04:52,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:04:52,841 INFO L225 Difference]: With dead ends: 2274 [2024-11-14 04:04:52,841 INFO L226 Difference]: Without dead ends: 2274 [2024-11-14 04:04:52,848 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5252 GetRequests, 4925 SyntacticMatches, 2 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30458 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=15934, Invalid=90668, Unknown=0, NotChecked=0, Total=106602 [2024-11-14 04:04:52,848 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 450 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4099 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 4099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:04:52,848 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 0 Invalid, 4148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 4099 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-14 04:04:52,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2274 states. [2024-11-14 04:04:52,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2274 to 1974. [2024-11-14 04:04:52,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 1.0319310694374049) internal successors, (2036), 1973 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:04:52,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 2036 transitions. [2024-11-14 04:04:52,869 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 2036 transitions. Word has length 1688 [2024-11-14 04:04:52,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:04:52,870 INFO L471 AbstractCegarLoop]: Abstraction has 1974 states and 2036 transitions. [2024-11-14 04:04:52,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 184 states, 184 states have (on average 2.9565217391304346) internal successors, (544), 184 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:04:52,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 2036 transitions. [2024-11-14 04:04:52,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1713 [2024-11-14 04:04:52,886 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:04:52,886 INFO L215 NwaCegarLoop]: trace histogram [539, 539, 538, 32, 31, 31, 1, 1] [2024-11-14 04:04:52,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-14 04:04:53,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-14 04:04:53,087 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 04:04:53,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:04:53,087 INFO L85 PathProgramCache]: Analyzing trace with hash -370552531, now seen corresponding path program 21 times [2024-11-14 04:04:53,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:04:53,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666619492] [2024-11-14 04:04:53,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:04:53,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:04:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:05:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 453108 backedges. 191273 proven. 2766 refuted. 0 times theorem prover too weak. 259069 trivial. 0 not checked. [2024-11-14 04:05:06,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:05:06,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666619492] [2024-11-14 04:05:06,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666619492] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:05:06,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363190435] [2024-11-14 04:05:06,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:05:06,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:05:06,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:05:06,767 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:05:06,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eae439b-38e0-492a-a672-72c2751d7a67/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-14 04:07:36,891 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:07:36,891 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:07:36,961 INFO L255 TraceCheckSpWp]: Trace formula consists of 6896 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-14 04:07:36,973 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:07:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 453108 backedges. 363809 proven. 25031 refuted. 0 times theorem prover too weak. 64268 trivial. 0 not checked. [2024-11-14 04:07:40,156 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:07:43,107 INFO L134 CoverageAnalysis]: Checked inductivity of 453108 backedges. 363809 proven. 25031 refuted. 0 times theorem prover too weak. 64268 trivial. 0 not checked. [2024-11-14 04:07:43,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363190435] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:07:43,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [95446015] [2024-11-14 04:07:43,108 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 04:07:43,108 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:07:43,109 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:07:43,109 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:07:43,109 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:07:43,818 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:07:44,247 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '132763#(exists ((|v_ULTIMATE.start_foo_~b#1.base_753| Int) (|v_ULTIMATE.start_foo_~i~0#1_5392| Int) (|v_ULTIMATE.start_foo_~b#1.offset_752| Int)) (and (or (and (<= 0 |ULTIMATE.start_foo_~size#1|) (<= 1 |v_ULTIMATE.start_foo_~i~0#1_5392|)) (and (<= 0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_5392|) (<= 0 (+ |ULTIMATE.start_foo_~size#1| 1)))) (or (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_753|) (+ |v_ULTIMATE.start_foo_~b#1.offset_752| |v_ULTIMATE.start_foo_~i~0#1_5392| 1)) (< (+ |v_ULTIMATE.start_foo_~b#1.offset_752| |v_ULTIMATE.start_foo_~i~0#1_5392|) 0))))' at error location [2024-11-14 04:07:44,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:07:44,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:07:44,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 51, 51] total 104 [2024-11-14 04:07:44,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381716782] [2024-11-14 04:07:44,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:07:44,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2024-11-14 04:07:44,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:07:44,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2024-11-14 04:07:44,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1848, Invalid=9924, Unknown=0, NotChecked=0, Total=11772 [2024-11-14 04:07:44,252 INFO L87 Difference]: Start difference. First operand 1974 states and 2036 transitions. Second operand has 104 states, 104 states have (on average 3.769230769230769) internal successors, (392), 104 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)