./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.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_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/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_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/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_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/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 6ef2b56a2f4ebf2e6f7f4ededf8760f087ff726b08e36644d8dcb52a8d087cd1 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:20:07,604 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:20:07,728 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-14 04:20:07,739 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:20:07,742 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:20:07,793 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:20:07,795 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:20:07,795 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:20:07,796 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:20:07,796 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:20:07,797 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:20:07,797 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:20:07,797 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:20:07,798 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:20:07,798 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:20:07,798 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:20:07,800 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:20:07,800 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:20:07,800 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:20:07,800 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:20:07,800 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:20:07,801 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:20:07,801 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-14 04:20:07,801 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-14 04:20:07,801 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:20:07,801 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:20:07,801 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:20:07,801 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:20:07,802 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:20:07,802 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-14 04:20:07,802 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-14 04:20:07,802 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-14 04:20:07,802 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:20:07,802 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 04:20:07,802 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:20:07,802 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 04:20:07,802 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:20:07,803 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:20:07,803 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:20:07,803 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:20:07,803 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:20:07,803 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:20:07,803 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:20:07,803 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:20:07,803 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:20:07,804 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:20:07,804 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:20:07,804 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:20:07,804 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:20:07,804 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_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/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 -> 6ef2b56a2f4ebf2e6f7f4ededf8760f087ff726b08e36644d8dcb52a8d087cd1 [2024-11-14 04:20:08,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:20:08,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:20:08,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:20:08,254 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:20:08,254 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:20:08,256 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c Unable to find full path for "g++" [2024-11-14 04:20:10,813 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:20:11,230 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:20:11,231 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2024-11-14 04:20:11,248 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/data/7a37dc8ea/baf053f8a49842c39011709281b008b6/FLAG71e01a86f [2024-11-14 04:20:11,270 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/data/7a37dc8ea/baf053f8a49842c39011709281b008b6 [2024-11-14 04:20:11,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:20:11,275 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:20:11,277 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:20:11,277 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:20:11,283 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:20:11,284 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:20:11" (1/1) ... [2024-11-14 04:20:11,286 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b724104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:20:11, skipping insertion in model container [2024-11-14 04:20:11,286 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:20:11" (1/1) ... [2024-11-14 04:20:11,303 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:20:11,496 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:20:11,510 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:20:11,538 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:20:11,556 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:20:11,556 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:20:11 WrapperNode [2024-11-14 04:20:11,556 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:20:11,558 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:20:11,558 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:20:11,558 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:20:11,566 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:20:11" (1/1) ... [2024-11-14 04:20:11,575 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:20:11" (1/1) ... [2024-11-14 04:20:11,593 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2024-11-14 04:20:11,593 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:20:11,594 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:20:11,594 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:20:11,594 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:20:11,602 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:20:11" (1/1) ... [2024-11-14 04:20:11,602 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:20:11" (1/1) ... [2024-11-14 04:20:11,604 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:20:11" (1/1) ... [2024-11-14 04:20:11,604 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:20:11" (1/1) ... [2024-11-14 04:20:11,610 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:20:11" (1/1) ... [2024-11-14 04:20:11,616 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:20:11" (1/1) ... [2024-11-14 04:20:11,617 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:20:11" (1/1) ... [2024-11-14 04:20:11,618 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:20:11" (1/1) ... [2024-11-14 04:20:11,620 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:20:11,621 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:20:11,622 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:20:11,622 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:20:11,623 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:20:11" (1/1) ... [2024-11-14 04:20:11,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:20:11,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:11,669 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:20:11,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:20:11,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 04:20:11,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:20:11,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:20:11,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 04:20:11,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 04:20:11,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 04:20:11,782 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:20:11,785 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:20:12,045 INFO L? ?]: Removed 28 outVars from TransFormulas that were not future-live. [2024-11-14 04:20:12,045 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:20:12,104 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:20:12,105 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-14 04:20:12,105 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:20:12 BoogieIcfgContainer [2024-11-14 04:20:12,105 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:20:12,109 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:20:12,109 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:20:12,116 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:20:12,117 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:20:11" (1/3) ... [2024-11-14 04:20:12,119 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a40bff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:20:12, skipping insertion in model container [2024-11-14 04:20:12,119 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:20:11" (2/3) ... [2024-11-14 04:20:12,119 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a40bff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:20:12, skipping insertion in model container [2024-11-14 04:20:12,119 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:20:12" (3/3) ... [2024-11-14 04:20:12,121 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength6.c [2024-11-14 04:20:12,146 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:20:12,148 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG ArraysOfVariableLength6.c that has 1 procedures, 19 locations, 1 initial locations, 3 loop locations, and 8 error locations. [2024-11-14 04:20:12,217 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:20:12,241 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;@50a9a7a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:20:12,242 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-14 04:20:12,247 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 04:20:12,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 04:20:12,258 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:12,259 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 04:20:12,260 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 04:20:12,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:12,270 INFO L85 PathProgramCache]: Analyzing trace with hash 2991128, now seen corresponding path program 1 times [2024-11-14 04:20:12,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:12,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79604970] [2024-11-14 04:20:12,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:12,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:12,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:20:12,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:12,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79604970] [2024-11-14 04:20:12,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79604970] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:20:12,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:20:12,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:20:12,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736854188] [2024-11-14 04:20:12,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:20:12,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:20:12,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:12,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:20:12,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:20:12,668 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, 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 04:20:12,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:12,806 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2024-11-14 04:20:12,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:20:12,810 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 04:20:12,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:12,816 INFO L225 Difference]: With dead ends: 34 [2024-11-14 04:20:12,817 INFO L226 Difference]: Without dead ends: 33 [2024-11-14 04:20:12,819 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 04:20:12,822 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:12,823 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 16 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:20:12,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-14 04:20:12,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 20. [2024-11-14 04:20:12,858 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 04:20:12,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2024-11-14 04:20:12,863 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2024-11-14 04:20:12,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:12,864 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2024-11-14 04:20:12,864 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 04:20:12,864 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2024-11-14 04:20:12,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 04:20:12,865 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:12,865 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 04:20:12,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:20:12,866 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 04:20:12,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:12,866 INFO L85 PathProgramCache]: Analyzing trace with hash 2929705, now seen corresponding path program 1 times [2024-11-14 04:20:12,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:12,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374831506] [2024-11-14 04:20:12,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:12,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:12,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:12,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:20:12,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:12,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374831506] [2024-11-14 04:20:12,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374831506] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:20:12,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:20:12,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:20:12,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97191919] [2024-11-14 04:20:12,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:20:12,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:20:12,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:12,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:20:12,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:20:12,997 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:13,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:13,060 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2024-11-14 04:20:13,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:20:13,062 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 04:20:13,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:13,063 INFO L225 Difference]: With dead ends: 24 [2024-11-14 04:20:13,063 INFO L226 Difference]: Without dead ends: 24 [2024-11-14 04:20:13,064 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 04:20:13,066 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:13,067 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:20:13,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-14 04:20:13,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2024-11-14 04:20:13,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:13,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2024-11-14 04:20:13,076 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 4 [2024-11-14 04:20:13,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:13,077 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2024-11-14 04:20:13,077 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 04:20:13,078 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2024-11-14 04:20:13,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 04:20:13,079 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:13,079 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 04:20:13,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 04:20:13,081 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 04:20:13,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:13,082 INFO L85 PathProgramCache]: Analyzing trace with hash 2931454, now seen corresponding path program 1 times [2024-11-14 04:20:13,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:13,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588200882] [2024-11-14 04:20:13,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:13,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:13,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:20:13,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:13,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588200882] [2024-11-14 04:20:13,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588200882] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:20:13,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:20:13,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:20:13,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654321266] [2024-11-14 04:20:13,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:20:13,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:20:13,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:13,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:20:13,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:20:13,250 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:13,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:13,310 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2024-11-14 04:20:13,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:20:13,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-14 04:20:13,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:13,314 INFO L225 Difference]: With dead ends: 24 [2024-11-14 04:20:13,314 INFO L226 Difference]: Without dead ends: 24 [2024-11-14 04:20:13,314 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:20:13,315 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:13,319 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 20 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:20:13,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-14 04:20:13,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2024-11-14 04:20:13,322 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 04:20:13,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2024-11-14 04:20:13,325 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 4 [2024-11-14 04:20:13,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:13,326 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2024-11-14 04:20:13,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:13,326 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2024-11-14 04:20:13,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 04:20:13,327 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:13,327 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 04:20:13,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 04:20:13,328 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 04:20:13,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:13,329 INFO L85 PathProgramCache]: Analyzing trace with hash 90820908, now seen corresponding path program 1 times [2024-11-14 04:20:13,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:13,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103017348] [2024-11-14 04:20:13,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:13,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:13,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:20:13,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:13,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103017348] [2024-11-14 04:20:13,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103017348] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:20:13,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:20:13,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:20:13,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209973308] [2024-11-14 04:20:13,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:20:13,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:20:13,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:13,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:20:13,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:20:13,472 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 04:20:13,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:13,546 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2024-11-14 04:20:13,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:20:13,547 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 04:20:13,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:13,548 INFO L225 Difference]: With dead ends: 21 [2024-11-14 04:20:13,548 INFO L226 Difference]: Without dead ends: 21 [2024-11-14 04:20:13,548 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 04:20:13,549 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 04:20:13,550 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 04:20:13,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-14 04:20:13,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-14 04:20:13,559 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 04:20:13,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-11-14 04:20:13,560 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 5 [2024-11-14 04:20:13,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:13,563 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-11-14 04:20:13,563 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 04:20:13,563 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-11-14 04:20:13,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 04:20:13,564 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:13,565 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 04:20:13,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 04:20:13,565 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 04:20:13,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:13,566 INFO L85 PathProgramCache]: Analyzing trace with hash 90820909, now seen corresponding path program 1 times [2024-11-14 04:20:13,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:13,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546391525] [2024-11-14 04:20:13,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:13,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:13,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:20:13,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:13,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546391525] [2024-11-14 04:20:13,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546391525] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:20:13,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:20:13,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:20:13,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855908990] [2024-11-14 04:20:13,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:20:13,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:20:13,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:13,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:20:13,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:20:13,856 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 04:20:13,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:13,966 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2024-11-14 04:20:13,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:20:13,967 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 04:20:13,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:13,968 INFO L225 Difference]: With dead ends: 22 [2024-11-14 04:20:13,968 INFO L226 Difference]: Without dead ends: 22 [2024-11-14 04:20:13,968 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:20:13,969 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 04:20:13,969 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 04:20:13,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-14 04:20:13,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-14 04:20:13,972 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 04:20:13,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2024-11-14 04:20:13,977 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 5 [2024-11-14 04:20:13,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:13,977 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2024-11-14 04:20:13,977 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 04:20:13,977 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2024-11-14 04:20:13,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 04:20:13,978 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:13,978 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-14 04:20:13,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 04:20:13,978 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 04:20:13,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:13,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1379592412, now seen corresponding path program 1 times [2024-11-14 04:20:13,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:13,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938893424] [2024-11-14 04:20:13,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:13,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:14,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:14,111 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 04:20:14,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:14,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938893424] [2024-11-14 04:20:14,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938893424] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:20:14,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711819718] [2024-11-14 04:20:14,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:14,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:14,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:14,115 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:20:14,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:20:14,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:14,211 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 04:20:14,215 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:20:14,261 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 04:20:14,261 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:20:14,336 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 04:20:14,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711819718] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:20:14,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [418623877] [2024-11-14 04:20:14,367 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:20:14,367 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:20:14,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:20:14,379 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:20:14,384 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:20:15,302 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:20:15,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [418623877] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:20:15,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:20:15,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 9 [2024-11-14 04:20:15,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942542064] [2024-11-14 04:20:15,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:20:15,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:20:15,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:15,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:20:15,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-14 04:20:15,687 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 04:20:16,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:16,124 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2024-11-14 04:20:16,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:20:16,126 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 04:20:16,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:16,126 INFO L225 Difference]: With dead ends: 30 [2024-11-14 04:20:16,126 INFO L226 Difference]: Without dead ends: 30 [2024-11-14 04:20:16,127 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-14 04:20:16,128 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:16,128 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 13 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:20:16,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-14 04:20:16,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2024-11-14 04:20:16,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 28 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 04:20:16,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2024-11-14 04:20:16,132 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 7 [2024-11-14 04:20:16,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:16,132 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2024-11-14 04:20:16,132 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 04:20:16,132 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2024-11-14 04:20:16,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 04:20:16,133 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:16,133 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-14 04:20:16,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:20:16,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:16,334 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 04:20:16,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:16,334 INFO L85 PathProgramCache]: Analyzing trace with hash -182308134, now seen corresponding path program 1 times [2024-11-14 04:20:16,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:16,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184941367] [2024-11-14 04:20:16,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:16,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:20:16,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:16,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184941367] [2024-11-14 04:20:16,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184941367] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:20:16,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520764635] [2024-11-14 04:20:16,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:16,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:16,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:16,611 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:20:16,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:20:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:16,701 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 04:20:16,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:20:16,760 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 04:20:16,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:20:16,908 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:20:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:20:17,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520764635] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:20:17,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [359355778] [2024-11-14 04:20:17,050 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:20:17,051 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:20:17,051 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:20:17,051 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:20:17,052 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:20:17,620 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:20:18,304 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '437#(exists ((|v_ULTIMATE.start_foo_~b#1.base_15| Int) (|v_ULTIMATE.start_foo_~i~0#1_39| Int) (|v_ULTIMATE.start_foo_~b#1.offset_14| Int)) (and (<= 0 |v_ULTIMATE.start_foo_~i~0#1_39|) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= |v_ULTIMATE.start_foo_~b#1.offset_14| 0) (<= 2 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 2 |v_ULTIMATE.start_foo_~b#1.base_15|) (= 32 |ULTIMATE.start_foo_~size#1|) (<= |v_ULTIMATE.start_foo_~i~0#1_39| 31) (<= (select |#length| |v_ULTIMATE.start_foo_~b#1.base_15|) |v_ULTIMATE.start_foo_~i~0#1_39|)))' at error location [2024-11-14 04:20:18,304 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:20:18,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:20:18,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-14 04:20:18,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428531036] [2024-11-14 04:20:18,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:20:18,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 04:20:18,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:18,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 04:20:18,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-11-14 04:20:18,307 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:18,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:18,596 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2024-11-14 04:20:18,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 04:20:18,597 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-14 04:20:18,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:18,599 INFO L225 Difference]: With dead ends: 47 [2024-11-14 04:20:18,599 INFO L226 Difference]: Without dead ends: 47 [2024-11-14 04:20:18,600 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2024-11-14 04:20:18,601 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 99 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:18,601 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 31 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:20:18,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-14 04:20:18,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-11-14 04:20:18,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.5) internal successors, (60), 46 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:18,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2024-11-14 04:20:18,612 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 8 [2024-11-14 04:20:18,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:18,613 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2024-11-14 04:20:18,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:18,616 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2024-11-14 04:20:18,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 04:20:18,616 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:18,616 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:20:18,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 04:20:18,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 04:20:18,821 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 04:20:18,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:18,821 INFO L85 PathProgramCache]: Analyzing trace with hash 948678487, now seen corresponding path program 1 times [2024-11-14 04:20:18,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:18,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053224309] [2024-11-14 04:20:18,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:18,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:18,871 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 04:20:18,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:18,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053224309] [2024-11-14 04:20:18,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053224309] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:20:18,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:20:18,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:20:18,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142818084] [2024-11-14 04:20:18,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:20:18,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:20:18,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:18,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:20:18,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:20:18,874 INFO L87 Difference]: Start difference. First operand 47 states and 60 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 04:20:18,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:18,910 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2024-11-14 04:20:18,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:20:18,911 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 04:20:18,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:18,912 INFO L225 Difference]: With dead ends: 45 [2024-11-14 04:20:18,912 INFO L226 Difference]: Without dead ends: 45 [2024-11-14 04:20:18,912 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 04:20:18,913 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 04:20:18,914 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 04:20:18,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-14 04:20:18,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-11-14 04:20:18,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.45) internal successors, (58), 44 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2024-11-14 04:20:18,919 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 10 [2024-11-14 04:20:18,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:18,920 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2024-11-14 04:20:18,920 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 04:20:18,920 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2024-11-14 04:20:18,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 04:20:18,921 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:18,921 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:20:18,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 04:20:18,921 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 04:20:18,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:18,922 INFO L85 PathProgramCache]: Analyzing trace with hash 948678488, now seen corresponding path program 1 times [2024-11-14 04:20:18,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:18,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366911972] [2024-11-14 04:20:18,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:18,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:19,067 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 04:20:19,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:19,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366911972] [2024-11-14 04:20:19,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366911972] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:20:19,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366456250] [2024-11-14 04:20:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:19,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:19,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:19,071 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:20:19,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:20:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:19,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 04:20:19,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:20:19,256 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 04:20:19,256 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:20:19,306 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 04:20:19,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366456250] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:20:19,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1601858421] [2024-11-14 04:20:19,311 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:20:19,313 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:20:19,313 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:20:19,313 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:20:19,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:20:19,826 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:20:20,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1601858421] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:20:20,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:20:20,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 4, 4] total 14 [2024-11-14 04:20:20,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424870622] [2024-11-14 04:20:20,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:20:20,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:20:20,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:20,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:20:20,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-14 04:20:20,501 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 04:20:21,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:21,174 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2024-11-14 04:20:21,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 04:20:21,175 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 04:20:21,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:21,176 INFO L225 Difference]: With dead ends: 46 [2024-11-14 04:20:21,176 INFO L226 Difference]: Without dead ends: 46 [2024-11-14 04:20:21,176 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-11-14 04:20:21,177 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 8 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:21,177 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 5 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:20:21,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-14 04:20:21,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2024-11-14 04:20:21,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 44 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 04:20:21,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2024-11-14 04:20:21,185 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 10 [2024-11-14 04:20:21,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:21,185 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2024-11-14 04:20:21,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 04:20:21,186 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2024-11-14 04:20:21,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-14 04:20:21,186 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:21,186 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:20:21,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 04:20:21,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:21,388 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 04:20:21,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:21,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1146960371, now seen corresponding path program 1 times [2024-11-14 04:20:21,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:21,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928998469] [2024-11-14 04:20:21,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:21,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:21,500 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 04:20:21,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:21,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928998469] [2024-11-14 04:20:21,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928998469] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:20:21,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242001410] [2024-11-14 04:20:21,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:21,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:21,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:21,503 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:20:21,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:20:21,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:21,597 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 04:20:21,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:20:21,650 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 04:20:21,650 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:20:21,694 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 04:20:21,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242001410] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:20:21,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1456768787] [2024-11-14 04:20:21,697 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 04:20:21,697 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:20:21,697 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:20:21,698 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:20:21,698 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:20:22,323 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:20:23,237 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '875#(and (exists ((|v_ULTIMATE.start_main_old_#valid#1_10| (Array Int Int)) (|v_ULTIMATE.start_main_~i~1#1_46| Int) (|v_#valid_42| (Array Int Int)) (|v_ULTIMATE.start_main_~#b~0#1.offset_24| Int) (|v_ULTIMATE.start_main_~#b~0#1.base_29| Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_21| Int)) (and (<= 32 (mod |v_ULTIMATE.start_main_~i~1#1_46| 4294967296)) (<= 4 (+ |v_ULTIMATE.start_main_~#b~0#1.offset_24| (* |v_ULTIMATE.start_main_~i~1#1_46| 4))) (exists ((|v_#memory_int_18| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_18| |v_ULTIMATE.start_main_~#b~0#1.base_29| (store (select |v_#memory_int_18| |v_ULTIMATE.start_main_~#b~0#1.base_29|) (+ |v_ULTIMATE.start_main_~#b~0#1.offset_24| (- 4) (* |v_ULTIMATE.start_main_~i~1#1_46| 4)) (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_29|) (+ |v_ULTIMATE.start_main_~#b~0#1.offset_24| (- 4) (* |v_ULTIMATE.start_main_~i~1#1_46| 4))))))) (= (store (store |v_#valid_42| |v_ULTIMATE.start_main_~#b~0#1.base_29| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_21| 0) |#valid|) (= (select |v_#valid_42| |v_ULTIMATE.start_main_~#b~0#1.base_29|) 1) (<= (+ |v_ULTIMATE.start_main_~#b~0#1.offset_24| (* |v_ULTIMATE.start_main_~i~1#1_46| 4)) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_29|)) (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_29|) |v_ULTIMATE.start_main_~#b~0#1.offset_24|) 32)) (<= 32 (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_29|) (+ |v_ULTIMATE.start_main_~#b~0#1.offset_24| (- 4) (* |v_ULTIMATE.start_main_~i~1#1_46| 4)))) (<= (+ |v_ULTIMATE.start_main_~#b~0#1.offset_24| 4) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_29|)) (<= (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_29|) (+ |v_ULTIMATE.start_main_~#b~0#1.offset_24| (- 4) (* |v_ULTIMATE.start_main_~i~1#1_46| 4))) 2147483647) (not (= |v_ULTIMATE.start_main_old_#valid#1_10| |#valid|)) (<= 0 |v_ULTIMATE.start_main_~#b~0#1.offset_24|))) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#res#1| 1))' at error location [2024-11-14 04:20:23,237 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:20:23,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:20:23,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-14 04:20:23,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405158772] [2024-11-14 04:20:23,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:20:23,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 04:20:23,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:23,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 04:20:23,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=190, Unknown=2, NotChecked=0, Total=240 [2024-11-14 04:20:23,239 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:23,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:23,318 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2024-11-14 04:20:23,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:20:23,318 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-14 04:20:23,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:23,319 INFO L225 Difference]: With dead ends: 45 [2024-11-14 04:20:23,319 INFO L226 Difference]: Without dead ends: 45 [2024-11-14 04:20:23,320 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=48, Invalid=190, Unknown=2, NotChecked=0, Total=240 [2024-11-14 04:20:23,320 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:23,321 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 25 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:20:23,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-14 04:20:23,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-11-14 04:20:23,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 44 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 04:20:23,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2024-11-14 04:20:23,328 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 12 [2024-11-14 04:20:23,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:23,328 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2024-11-14 04:20:23,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:23,328 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2024-11-14 04:20:23,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 04:20:23,329 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:23,329 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1] [2024-11-14 04:20:23,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 04:20:23,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 04:20:23,538 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 04:20:23,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:23,538 INFO L85 PathProgramCache]: Analyzing trace with hash -514280723, now seen corresponding path program 2 times [2024-11-14 04:20:23,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:23,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631740653] [2024-11-14 04:20:23,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:23,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:20:23,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:23,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631740653] [2024-11-14 04:20:23,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631740653] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:20:23,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449211510] [2024-11-14 04:20:23,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:20:23,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:23,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:23,874 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:20:23,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:20:23,960 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 04:20:23,961 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:20:23,964 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 04:20:23,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:20:23,991 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 04:20:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 04:20:24,250 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:20:24,523 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 04:20:24,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449211510] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:20:24,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [75898333] [2024-11-14 04:20:24,526 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:20:24,528 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:20:24,529 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:20:24,529 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:20:24,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:20:24,787 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:20:25,434 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1085#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~1#1| 0) (= 32 |ULTIMATE.start_foo_~size#1|) (exists ((|v_ULTIMATE.start_foo_~b#1.base_29| Int) (|v_ULTIMATE.start_foo_~i~0#1_75| Int)) (and (<= 1 |#StackHeapBarrier|) (<= (select |#length| |v_ULTIMATE.start_foo_~b#1.base_29|) |v_ULTIMATE.start_foo_~i~0#1_75|) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 2 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |v_ULTIMATE.start_foo_~i~0#1_75|) (<= 2 |v_ULTIMATE.start_foo_~b#1.base_29|) (<= |v_ULTIMATE.start_foo_~i~0#1_75| 31))))' at error location [2024-11-14 04:20:25,434 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:20:25,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:20:25,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2024-11-14 04:20:25,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707788223] [2024-11-14 04:20:25,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:20:25,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 04:20:25,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:25,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 04:20:25,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-11-14 04:20:25,441 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 04:20:26,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:26,210 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2024-11-14 04:20:26,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 04:20:26,211 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 17 [2024-11-14 04:20:26,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:26,212 INFO L225 Difference]: With dead ends: 52 [2024-11-14 04:20:26,212 INFO L226 Difference]: Without dead ends: 52 [2024-11-14 04:20:26,213 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2024-11-14 04:20:26,213 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 71 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:26,214 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 30 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:20:26,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-14 04:20:26,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2024-11-14 04:20:26,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 39 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 04:20:26,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2024-11-14 04:20:26,218 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 17 [2024-11-14 04:20:26,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:26,218 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2024-11-14 04:20:26,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 04:20:26,219 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2024-11-14 04:20:26,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-14 04:20:26,219 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:26,219 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:20:26,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 04:20:26,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 04:20:26,424 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 04:20:26,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:26,424 INFO L85 PathProgramCache]: Analyzing trace with hash 845117574, now seen corresponding path program 2 times [2024-11-14 04:20:26,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:26,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481091652] [2024-11-14 04:20:26,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:26,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:26,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:20:26,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:26,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481091652] [2024-11-14 04:20:26,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481091652] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:20:26,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942763793] [2024-11-14 04:20:26,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:20:26,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:26,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:26,606 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:20:26,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:20:26,685 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-14 04:20:26,685 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:20:26,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 04:20:26,689 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:20:27,087 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#mask~0#1.base_22| Int) (|v_ULTIMATE.start_main_~#b~0#1.base_30| Int) (v_DerPreprocessor_2 Int) (v_DerPreprocessor_1 Int)) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_30|) 0) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_30| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_22| 0)) (<= 1 (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_30| v_DerPreprocessor_1) |v_ULTIMATE.start_main_~#mask~0#1.base_22| v_DerPreprocessor_2) |v_ULTIMATE.start_main_~#b~0#1.base_30|)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#mask~0#1.base_22|) 0) (not (= |v_ULTIMATE.start_main_~#b~0#1.base_30| |v_ULTIMATE.start_main_~#mask~0#1.base_22|)))) is different from true [2024-11-14 04:20:27,088 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-14 04:20:27,088 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:20:27,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942763793] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:20:27,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:20:27,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 9 [2024-11-14 04:20:27,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733755476] [2024-11-14 04:20:27,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:20:27,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:20:27,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:27,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:20:27,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=34, Unknown=1, NotChecked=12, Total=72 [2024-11-14 04:20:27,090 INFO L87 Difference]: Start difference. First operand 40 states and 44 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 04:20:27,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:27,129 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2024-11-14 04:20:27,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:20:27,130 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 21 [2024-11-14 04:20:27,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:27,131 INFO L225 Difference]: With dead ends: 41 [2024-11-14 04:20:27,131 INFO L226 Difference]: Without dead ends: 40 [2024-11-14 04:20:27,132 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=34, Unknown=1, NotChecked=12, Total=72 [2024-11-14 04:20:27,133 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:27,133 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 5 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 15 Unchecked, 0.0s Time] [2024-11-14 04:20:27,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-14 04:20:27,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-14 04:20:27,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.162162162162162) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:27,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2024-11-14 04:20:27,140 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 21 [2024-11-14 04:20:27,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:27,140 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2024-11-14 04:20:27,140 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 04:20:27,141 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2024-11-14 04:20:27,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 04:20:27,141 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:27,141 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:20:27,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 04:20:27,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-14 04:20:27,344 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 04:20:27,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:27,344 INFO L85 PathProgramCache]: Analyzing trace with hash 428832865, now seen corresponding path program 1 times [2024-11-14 04:20:27,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:27,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109629928] [2024-11-14 04:20:27,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:27,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:27,533 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:20:27,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:27,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109629928] [2024-11-14 04:20:27,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109629928] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:20:27,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024370455] [2024-11-14 04:20:27,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:27,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:27,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:27,537 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:20:27,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 04:20:27,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:27,648 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 04:20:27,650 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:20:27,811 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:20:27,812 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:20:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:20:27,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024370455] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:20:27,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1084248754] [2024-11-14 04:20:27,979 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 04:20:27,979 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:20:27,979 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:20:27,980 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:20:27,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:20:28,730 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:20:29,267 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1498#(and (exists ((|v_ULTIMATE.start_main_~#mask~0#1.base_23| Int) (|v_#valid_48| (Array Int Int)) (|v_ULTIMATE.start_main_~#b~0#1.base_31| Int)) (= (store (store |v_#valid_48| |v_ULTIMATE.start_main_~#b~0#1.base_31| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_23| 0) |#valid|)) (exists ((|v_ULTIMATE.start_main_~i~1#1_57| Int)) (and (<= 32 (mod |v_ULTIMATE.start_main_~i~1#1_57| 4294967296)) (<= 0 |v_ULTIMATE.start_main_~i~1#1_57|))) (exists ((|v_ULTIMATE.start_main_old_#valid#1_11| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_11| |#valid|))) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-14 04:20:29,267 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:20:29,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:20:29,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-14 04:20:29,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328949112] [2024-11-14 04:20:29,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:20:29,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 04:20:29,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:29,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 04:20:29,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2024-11-14 04:20:29,269 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 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 04:20:29,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:29,383 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2024-11-14 04:20:29,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 04:20:29,384 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 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 22 [2024-11-14 04:20:29,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:29,385 INFO L225 Difference]: With dead ends: 76 [2024-11-14 04:20:29,385 INFO L226 Difference]: Without dead ends: 76 [2024-11-14 04:20:29,386 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2024-11-14 04:20:29,386 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:29,387 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 31 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:20:29,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-14 04:20:29,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-11-14 04:20:29,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 73 states have (on average 1.082191780821918) internal successors, (79), 75 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:29,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2024-11-14 04:20:29,392 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 22 [2024-11-14 04:20:29,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:29,392 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2024-11-14 04:20:29,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 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 04:20:29,393 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2024-11-14 04:20:29,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-14 04:20:29,394 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:29,394 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:20:29,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 04:20:29,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:29,599 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 04:20:29,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:29,599 INFO L85 PathProgramCache]: Analyzing trace with hash 38139329, now seen corresponding path program 2 times [2024-11-14 04:20:29,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:29,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711960275] [2024-11-14 04:20:29,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:29,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:29,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:30,132 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:20:30,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:30,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711960275] [2024-11-14 04:20:30,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711960275] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:20:30,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874771158] [2024-11-14 04:20:30,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:20:30,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:30,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:30,136 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:20:30,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 04:20:30,229 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-14 04:20:30,229 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:20:30,230 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 04:20:30,233 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:20:30,736 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#mask~0#1.base_24| Int) (v_DerPreprocessor_4 Int) (v_DerPreprocessor_3 Int) (|v_ULTIMATE.start_main_~#b~0#1.base_32| Int)) (and (= (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_32| v_DerPreprocessor_3) |v_ULTIMATE.start_main_~#mask~0#1.base_24| v_DerPreprocessor_4) |v_ULTIMATE.start_main_~#b~0#1.base_32|) v_DerPreprocessor_3) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#mask~0#1.base_24|) 0) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_32| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_24| 0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_32|) 0))) is different from true [2024-11-14 04:20:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2024-11-14 04:20:30,737 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:20:30,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874771158] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:20:30,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:20:30,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 16 [2024-11-14 04:20:30,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635624206] [2024-11-14 04:20:30,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:20:30,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:20:30,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:30,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:20:30,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=127, Unknown=1, NotChecked=26, Total=240 [2024-11-14 04:20:30,739 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:30,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:30,788 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2024-11-14 04:20:30,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:20:30,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-14 04:20:30,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:30,790 INFO L225 Difference]: With dead ends: 75 [2024-11-14 04:20:30,790 INFO L226 Difference]: Without dead ends: 74 [2024-11-14 04:20:30,790 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=127, Unknown=1, NotChecked=26, Total=240 [2024-11-14 04:20:30,791 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:30,791 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2024-11-14 04:20:30,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-14 04:20:30,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-11-14 04:20:30,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 73 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:30,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2024-11-14 04:20:30,797 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 40 [2024-11-14 04:20:30,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:30,798 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2024-11-14 04:20:30,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:30,798 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2024-11-14 04:20:30,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-14 04:20:30,799 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:30,799 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:20:30,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-14 04:20:31,003 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:31,004 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 04:20:31,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:31,005 INFO L85 PathProgramCache]: Analyzing trace with hash 38138386, now seen corresponding path program 1 times [2024-11-14 04:20:31,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:31,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179241199] [2024-11-14 04:20:31,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:31,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:20:31,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:31,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179241199] [2024-11-14 04:20:31,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179241199] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:20:31,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617631027] [2024-11-14 04:20:31,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:31,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:31,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:31,412 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:20:31,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 04:20:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:31,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 04:20:31,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:20:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:20:31,857 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:20:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:20:32,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617631027] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:20:32,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [337925343] [2024-11-14 04:20:32,238 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 04:20:32,238 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:20:32,238 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:20:32,238 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:20:32,239 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:20:32,924 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:20:33,422 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1941#true' at error location [2024-11-14 04:20:33,423 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:20:33,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:20:33,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2024-11-14 04:20:33,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950664653] [2024-11-14 04:20:33,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:20:33,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-14 04:20:33,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:33,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-14 04:20:33,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=1153, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 04:20:33,427 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 35 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:33,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:33,620 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2024-11-14 04:20:33,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-14 04:20:33,622 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 35 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-14 04:20:33,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:33,623 INFO L225 Difference]: With dead ends: 146 [2024-11-14 04:20:33,623 INFO L226 Difference]: Without dead ends: 146 [2024-11-14 04:20:33,624 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 80 SyntacticMatches, 11 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1343 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=569, Invalid=1153, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 04:20:33,625 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:33,629 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 21 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:20:33,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-14 04:20:33,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2024-11-14 04:20:33,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 144 states have (on average 1.0347222222222223) internal successors, (149), 145 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:33,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 149 transitions. [2024-11-14 04:20:33,645 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 149 transitions. Word has length 40 [2024-11-14 04:20:33,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:33,645 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 149 transitions. [2024-11-14 04:20:33,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 35 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:33,645 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 149 transitions. [2024-11-14 04:20:33,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-14 04:20:33,651 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:33,651 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:20:33,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-14 04:20:33,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:33,852 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 04:20:33,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:33,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1376199890, now seen corresponding path program 2 times [2024-11-14 04:20:33,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:33,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457499253] [2024-11-14 04:20:33,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:33,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:35,174 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 1 proven. 715 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:20:35,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:35,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457499253] [2024-11-14 04:20:35,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457499253] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:20:35,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039759268] [2024-11-14 04:20:35,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:20:35,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:35,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:35,178 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:20:35,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 04:20:35,295 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 04:20:35,295 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:20:35,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 04:20:35,299 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:20:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 717 trivial. 0 not checked. [2024-11-14 04:20:35,481 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:20:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2024-11-14 04:20:35,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039759268] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:20:35,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [851143701] [2024-11-14 04:20:35,896 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 04:20:35,896 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:20:35,896 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:20:35,896 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:20:35,897 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:20:36,496 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:20:36,932 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2509#true' at error location [2024-11-14 04:20:36,932 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:20:36,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:20:36,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 3, 5] total 31 [2024-11-14 04:20:36,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071818601] [2024-11-14 04:20:36,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:20:36,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-14 04:20:36,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:36,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-14 04:20:36,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=1138, Unknown=0, NotChecked=0, Total=1482 [2024-11-14 04:20:36,935 INFO L87 Difference]: Start difference. First operand 146 states and 149 transitions. Second operand has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 31 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:41,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:41,718 INFO L93 Difference]: Finished difference Result 313 states and 322 transitions. [2024-11-14 04:20:41,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2024-11-14 04:20:41,719 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 31 states have internal predecessors, (95), 0 states have call successors, (0), 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 76 [2024-11-14 04:20:41,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:41,721 INFO L225 Difference]: With dead ends: 313 [2024-11-14 04:20:41,721 INFO L226 Difference]: Without dead ends: 313 [2024-11-14 04:20:41,731 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4911 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=4398, Invalid=12894, Unknown=0, NotChecked=0, Total=17292 [2024-11-14 04:20:41,732 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 322 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:41,732 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 0 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:20:41,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2024-11-14 04:20:41,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 297. [2024-11-14 04:20:41,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 295 states have (on average 1.0305084745762711) internal successors, (304), 296 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:41,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 304 transitions. [2024-11-14 04:20:41,745 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 304 transitions. Word has length 76 [2024-11-14 04:20:41,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:41,745 INFO L471 AbstractCegarLoop]: Abstraction has 297 states and 304 transitions. [2024-11-14 04:20:41,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 31 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:41,745 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 304 transitions. [2024-11-14 04:20:41,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-14 04:20:41,750 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:41,750 INFO L215 NwaCegarLoop]: trace histogram [46, 46, 46, 2, 2, 1, 1, 1] [2024-11-14 04:20:41,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-14 04:20:41,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 04:20:41,955 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 04:20:41,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:41,955 INFO L85 PathProgramCache]: Analyzing trace with hash -475750045, now seen corresponding path program 1 times [2024-11-14 04:20:41,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:41,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830862261] [2024-11-14 04:20:41,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:41,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:42,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1635 proven. 782 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2024-11-14 04:20:43,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:43,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830862261] [2024-11-14 04:20:43,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830862261] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:20:43,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934575803] [2024-11-14 04:20:43,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:43,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:43,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:43,758 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:20:43,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 04:20:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:43,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-14 04:20:43,983 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:20:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1635 proven. 782 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2024-11-14 04:20:45,230 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:20:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1635 proven. 782 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2024-11-14 04:20:46,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934575803] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:20:46,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2145002070] [2024-11-14 04:20:46,994 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 04:20:46,994 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:20:46,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:20:46,995 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:20:46,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:20:47,396 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:20:47,840 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4732#(and (<= 32 |ULTIMATE.start_main_#t~ret2#1|) (<= |ULTIMATE.start_main_#t~ret2#1| 2147483647))' at error location [2024-11-14 04:20:47,840 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:20:47,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:20:47,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 74 [2024-11-14 04:20:47,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529727668] [2024-11-14 04:20:47,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:20:47,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-11-14 04:20:47,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:47,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-11-14 04:20:47,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2249, Invalid=3913, Unknown=0, NotChecked=0, Total=6162 [2024-11-14 04:20:47,846 INFO L87 Difference]: Start difference. First operand 297 states and 304 transitions. Second operand has 74 states, 74 states have (on average 2.9864864864864864) internal successors, (221), 74 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:48,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:48,134 INFO L93 Difference]: Finished difference Result 405 states and 412 transitions. [2024-11-14 04:20:48,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-14 04:20:48,135 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.9864864864864864) internal successors, (221), 74 states have internal predecessors, (221), 0 states have call successors, (0), 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 145 [2024-11-14 04:20:48,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:48,138 INFO L225 Difference]: With dead ends: 405 [2024-11-14 04:20:48,138 INFO L226 Difference]: Without dead ends: 405 [2024-11-14 04:20:48,140 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2249, Invalid=3913, Unknown=0, NotChecked=0, Total=6162 [2024-11-14 04:20:48,141 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:48,141 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 26 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:20:48,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2024-11-14 04:20:48,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 405. [2024-11-14 04:20:48,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 403 states have (on average 1.022332506203474) internal successors, (412), 404 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:48,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 412 transitions. [2024-11-14 04:20:48,166 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 412 transitions. Word has length 145 [2024-11-14 04:20:48,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:48,167 INFO L471 AbstractCegarLoop]: Abstraction has 405 states and 412 transitions. [2024-11-14 04:20:48,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.9864864864864864) internal successors, (221), 74 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:48,167 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 412 transitions. [2024-11-14 04:20:48,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2024-11-14 04:20:48,175 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:48,175 INFO L215 NwaCegarLoop]: trace histogram [64, 64, 64, 2, 2, 1, 1, 1] [2024-11-14 04:20:48,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 04:20:48,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 04:20:48,376 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 04:20:48,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:48,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1719617409, now seen corresponding path program 2 times [2024-11-14 04:20:48,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:48,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052349951] [2024-11-14 04:20:48,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:48,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:48,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6179 backedges. 0 proven. 3139 refuted. 0 times theorem prover too weak. 3040 trivial. 0 not checked. [2024-11-14 04:20:49,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:49,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052349951] [2024-11-14 04:20:49,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052349951] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:20:49,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288823533] [2024-11-14 04:20:49,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:20:49,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:49,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:49,395 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:20:49,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 04:20:49,554 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 04:20:49,555 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:20:49,556 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 04:20:49,563 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:20:49,581 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 04:20:49,591 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 04:20:49,603 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 04:20:51,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6179 backedges. 0 proven. 3139 refuted. 0 times theorem prover too weak. 3040 trivial. 0 not checked. [2024-11-14 04:20:51,287 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:20:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6179 backedges. 0 proven. 3139 refuted. 0 times theorem prover too weak. 3040 trivial. 0 not checked. [2024-11-14 04:20:52,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288823533] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:20:52,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1025273983] [2024-11-14 04:20:52,424 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 04:20:52,424 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:20:52,424 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:20:52,425 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:20:52,425 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:20:52,633 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:20:54,506 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6745#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 32 |ULTIMATE.start_main_#t~ret2#1|) (<= |ULTIMATE.start_main_#t~ret2#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#mask~0#1.base|))' at error location [2024-11-14 04:20:54,506 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:20:54,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:20:54,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 8 [2024-11-14 04:20:54,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190405625] [2024-11-14 04:20:54,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:20:54,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 04:20:54,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:54,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 04:20:54,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-14 04:20:54,508 INFO L87 Difference]: Start difference. First operand 405 states and 412 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 04:20:54,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:54,622 INFO L93 Difference]: Finished difference Result 503 states and 509 transitions. [2024-11-14 04:20:54,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:20:54,623 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 199 [2024-11-14 04:20:54,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:54,625 INFO L225 Difference]: With dead ends: 503 [2024-11-14 04:20:54,626 INFO L226 Difference]: Without dead ends: 503 [2024-11-14 04:20:54,626 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 521 SyntacticMatches, 64 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-11-14 04:20:54,627 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:54,627 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 20 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:20:54,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2024-11-14 04:20:54,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 503. [2024-11-14 04:20:54,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 501 states have (on average 1.0159680638722555) internal successors, (509), 502 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:54,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 509 transitions. [2024-11-14 04:20:54,642 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 509 transitions. Word has length 199 [2024-11-14 04:20:54,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:54,643 INFO L471 AbstractCegarLoop]: Abstraction has 503 states and 509 transitions. [2024-11-14 04:20:54,643 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 04:20:54,644 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 509 transitions. [2024-11-14 04:20:54,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2024-11-14 04:20:54,652 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:54,652 INFO L215 NwaCegarLoop]: trace histogram [128, 128, 128, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2024-11-14 04:20:54,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-14 04:20:54,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 04:20:54,857 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 04:20:54,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:54,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1071335604, now seen corresponding path program 3 times [2024-11-14 04:20:54,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:54,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171241794] [2024-11-14 04:20:54,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:54,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:55,955 INFO L134 CoverageAnalysis]: Checked inductivity of 24920 backedges. 0 proven. 18838 refuted. 0 times theorem prover too weak. 6082 trivial. 0 not checked. [2024-11-14 04:20:55,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:55,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171241794] [2024-11-14 04:20:55,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171241794] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:20:55,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429287858] [2024-11-14 04:20:55,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:20:55,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:55,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:55,959 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:20:55,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 04:21:00,809 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:21:00,809 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:21:00,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 1590 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 04:21:00,829 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:21:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 24920 backedges. 18834 proven. 6 refuted. 0 times theorem prover too weak. 6080 trivial. 0 not checked. [2024-11-14 04:21:02,323 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:21:02,420 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 04:21:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 24920 backedges. 18834 proven. 6 refuted. 0 times theorem prover too weak. 6080 trivial. 0 not checked. [2024-11-14 04:21:04,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429287858] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:21:04,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [116464401] [2024-11-14 04:21:04,172 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 04:21:04,173 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:21:04,173 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:21:04,173 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:21:04,173 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:21:04,739 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:21:05,125 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7758#true' at error location [2024-11-14 04:21:05,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:21:05,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:21:05,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2024-11-14 04:21:05,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142470603] [2024-11-14 04:21:05,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:21:05,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 04:21:05,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:21:05,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 04:21:05,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2024-11-14 04:21:05,128 INFO L87 Difference]: Start difference. First operand 503 states and 509 transitions. Second operand has 21 states, 21 states have (on average 4.380952380952381) internal successors, (92), 20 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:05,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:21:05,551 INFO L93 Difference]: Finished difference Result 615 states and 624 transitions. [2024-11-14 04:21:05,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 04:21:05,552 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.380952380952381) internal successors, (92), 20 states have internal predecessors, (92), 0 states have call successors, (0), 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 403 [2024-11-14 04:21:05,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:21:05,556 INFO L225 Difference]: With dead ends: 615 [2024-11-14 04:21:05,556 INFO L226 Difference]: Without dead ends: 615 [2024-11-14 04:21:05,557 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1219 GetRequests, 1185 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2024-11-14 04:21:05,557 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 126 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:21:05,558 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 52 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:21:05,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2024-11-14 04:21:05,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 513. [2024-11-14 04:21:05,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 511 states have (on average 1.015655577299413) internal successors, (519), 512 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:05,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 519 transitions. [2024-11-14 04:21:05,573 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 519 transitions. Word has length 403 [2024-11-14 04:21:05,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:21:05,574 INFO L471 AbstractCegarLoop]: Abstraction has 513 states and 519 transitions. [2024-11-14 04:21:05,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.380952380952381) internal successors, (92), 20 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:05,575 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 519 transitions. [2024-11-14 04:21:05,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2024-11-14 04:21:05,586 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:21:05,586 INFO L215 NwaCegarLoop]: trace histogram [160, 160, 160, 5, 5, 4, 1, 1] [2024-11-14 04:21:05,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 04:21:05,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:21:05,787 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 04:21:05,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:21:05,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1212857983, now seen corresponding path program 3 times [2024-11-14 04:21:05,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:21:05,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594042242] [2024-11-14 04:21:05,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:21:05,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:21:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:21:08,459 INFO L134 CoverageAnalysis]: Checked inductivity of 38990 backedges. 0 proven. 31390 refuted. 0 times theorem prover too weak. 7600 trivial. 0 not checked. [2024-11-14 04:21:08,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:21:08,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594042242] [2024-11-14 04:21:08,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594042242] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:21:08,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224764348] [2024-11-14 04:21:08,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:21:08,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:21:08,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:21:08,463 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:21:08,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 04:21:14,700 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:21:14,700 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:21:14,717 INFO L255 TraceCheckSpWp]: Trace formula consists of 1951 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 04:21:14,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:21:14,750 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 04:21:14,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:21:14,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 04:21:18,140 INFO L134 CoverageAnalysis]: Checked inductivity of 38990 backedges. 0 proven. 31390 refuted. 0 times theorem prover too weak. 7600 trivial. 0 not checked. [2024-11-14 04:21:18,141 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:21:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 38990 backedges. 0 proven. 31390 refuted. 0 times theorem prover too weak. 7600 trivial. 0 not checked. [2024-11-14 04:21:20,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224764348] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:21:20,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2042945683] [2024-11-14 04:21:20,963 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 04:21:20,963 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:21:20,964 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:21:20,964 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:21:20,964 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:21:21,159 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:21:25,992 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14327#(and (<= 32 |ULTIMATE.start_main_#t~ret2#1|) (<= |ULTIMATE.start_main_#t~ret2#1| 2147483647))' at error location [2024-11-14 04:21:25,992 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:21:25,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:21:25,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-14 04:21:25,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069342808] [2024-11-14 04:21:25,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:21:25,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-14 04:21:25,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:21:25,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-14 04:21:25,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2024-11-14 04:21:25,994 INFO L87 Difference]: Start difference. First operand 513 states and 519 transitions. Second operand has 18 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:26,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:21:26,332 INFO L93 Difference]: Finished difference Result 1106 states and 1123 transitions. [2024-11-14 04:21:26,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 04:21:26,333 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 496 [2024-11-14 04:21:26,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:21:26,336 INFO L225 Difference]: With dead ends: 1106 [2024-11-14 04:21:26,337 INFO L226 Difference]: Without dead ends: 1106 [2024-11-14 04:21:26,337 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1496 GetRequests, 1312 SyntacticMatches, 160 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1828 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=176, Invalid=474, Unknown=0, NotChecked=0, Total=650 [2024-11-14 04:21:26,338 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:21:26,338 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 80 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:21:26,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2024-11-14 04:21:26,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1106. [2024-11-14 04:21:26,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 1104 states have (on average 1.0172101449275361) internal successors, (1123), 1105 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:26,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1123 transitions. [2024-11-14 04:21:26,368 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1123 transitions. Word has length 496 [2024-11-14 04:21:26,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:21:26,369 INFO L471 AbstractCegarLoop]: Abstraction has 1106 states and 1123 transitions. [2024-11-14 04:21:26,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:26,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1123 transitions. [2024-11-14 04:21:26,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2024-11-14 04:21:26,373 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:21:26,373 INFO L215 NwaCegarLoop]: trace histogram [160, 160, 160, 5, 5, 5, 5, 4, 4, 1, 1, 1] [2024-11-14 04:21:26,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-14 04:21:26,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:21:26,574 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 04:21:26,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:21:26,575 INFO L85 PathProgramCache]: Analyzing trace with hash 960206507, now seen corresponding path program 4 times [2024-11-14 04:21:26,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:21:26,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630911168] [2024-11-14 04:21:26,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:21:26,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:21:26,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:21:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 39021 backedges. 0 proven. 31395 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2024-11-14 04:21:28,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:21:28,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630911168] [2024-11-14 04:21:28,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630911168] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:21:28,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839720206] [2024-11-14 04:21:28,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:21:28,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:21:28,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:21:28,248 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:21:28,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 04:21:28,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:21:28,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 2009 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 04:21:28,980 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:21:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 39021 backedges. 31390 proven. 31 refuted. 0 times theorem prover too weak. 7600 trivial. 0 not checked. [2024-11-14 04:21:31,191 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:21:31,425 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 04:21:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 39021 backedges. 31390 proven. 31 refuted. 0 times theorem prover too weak. 7600 trivial. 0 not checked. [2024-11-14 04:21:33,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839720206] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:21:33,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [944389580] [2024-11-14 04:21:33,447 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 04:21:33,447 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:21:33,447 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:21:33,447 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:21:33,447 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:21:34,001 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:21:34,543 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16551#true' at error location [2024-11-14 04:21:34,543 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:21:34,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:21:34,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 29 [2024-11-14 04:21:34,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276228536] [2024-11-14 04:21:34,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:21:34,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-14 04:21:34,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:21:34,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-14 04:21:34,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1188, Unknown=0, NotChecked=0, Total=1406 [2024-11-14 04:21:34,547 INFO L87 Difference]: Start difference. First operand 1106 states and 1123 transitions. Second operand has 30 states, 30 states have (on average 4.266666666666667) internal successors, (128), 29 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 04:21:35,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:21:35,027 INFO L93 Difference]: Finished difference Result 1113 states and 1130 transitions. [2024-11-14 04:21:35,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 04:21:35,028 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.266666666666667) internal successors, (128), 29 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) Word has length 511 [2024-11-14 04:21:35,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:21:35,033 INFO L225 Difference]: With dead ends: 1113 [2024-11-14 04:21:35,033 INFO L226 Difference]: Without dead ends: 1113 [2024-11-14 04:21:35,034 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1542 GetRequests, 1501 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=293, Invalid=1429, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 04:21:35,035 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 176 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:21:35,035 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 104 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:21:35,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2024-11-14 04:21:35,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1109. [2024-11-14 04:21:35,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 1107 states have (on average 1.016260162601626) internal successors, (1125), 1108 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:35,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1125 transitions. [2024-11-14 04:21:35,064 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1125 transitions. Word has length 511 [2024-11-14 04:21:35,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:21:35,065 INFO L471 AbstractCegarLoop]: Abstraction has 1109 states and 1125 transitions. [2024-11-14 04:21:35,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.266666666666667) internal successors, (128), 29 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 04:21:35,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1125 transitions. [2024-11-14 04:21:35,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 614 [2024-11-14 04:21:35,071 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:21:35,071 INFO L215 NwaCegarLoop]: trace histogram [192, 192, 192, 6, 6, 6, 6, 5, 5, 1, 1, 1] [2024-11-14 04:21:35,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 04:21:35,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-14 04:21:35,276 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-14 04:21:35,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:21:35,276 INFO L85 PathProgramCache]: Analyzing trace with hash 2038038452, now seen corresponding path program 5 times [2024-11-14 04:21:35,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:21:35,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352564326] [2024-11-14 04:21:35,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:21:35,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:21:35,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:21:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 56251 backedges. 0 proven. 47091 refuted. 0 times theorem prover too weak. 9160 trivial. 0 not checked. [2024-11-14 04:21:36,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:21:36,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352564326] [2024-11-14 04:21:36,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352564326] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:21:36,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577111328] [2024-11-14 04:21:36,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:21:36,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:21:36,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:21:36,888 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:21:36,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 04:21:37,278 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 04:21:37,278 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:21:37,281 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 04:21:37,293 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:21:37,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:21:37,311 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 11 treesize of output 5 [2024-11-14 04:21:37,318 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 04:21:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 56251 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 56231 trivial. 0 not checked. [2024-11-14 04:21:40,106 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:21:40,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577111328] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:21:40,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:21:40,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 12 [2024-11-14 04:21:40,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846869837] [2024-11-14 04:21:40,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:21:40,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:21:40,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:21:40,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:21:40,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-14 04:21:40,107 INFO L87 Difference]: Start difference. First operand 1109 states and 1125 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:40,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:21:40,179 INFO L93 Difference]: Finished difference Result 1107 states and 1123 transitions. [2024-11-14 04:21:40,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:21:40,180 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 613 [2024-11-14 04:21:40,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:21:40,181 INFO L225 Difference]: With dead ends: 1107 [2024-11-14 04:21:40,181 INFO L226 Difference]: Without dead ends: 0 [2024-11-14 04:21:40,181 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 609 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-14 04:21:40,183 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:21:40,184 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 6 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:21:40,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-14 04:21:40,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-14 04:21:40,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:40,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-14 04:21:40,185 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 613 [2024-11-14 04:21:40,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:21:40,186 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-14 04:21:40,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:40,186 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-14 04:21:40,186 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-14 04:21:40,189 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (7 of 8 remaining) [2024-11-14 04:21:40,190 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2024-11-14 04:21:40,190 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2024-11-14 04:21:40,190 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2024-11-14 04:21:40,190 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2024-11-14 04:21:40,191 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 8 remaining) [2024-11-14 04:21:40,191 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 8 remaining) [2024-11-14 04:21:40,191 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2024-11-14 04:21:40,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-14 04:21:40,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:21:40,398 INFO L407 BasicCegarLoop]: Path program histogram: [5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:21:40,401 INFO L173 ceAbstractionStarter]: Computing trace abstraction results [2024-11-14 04:21:40,406 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.11 04:21:40 BoogieIcfgContainer [2024-11-14 04:21:40,406 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-14 04:21:40,406 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-14 04:21:40,406 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-14 04:21:40,407 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-14 04:21:40,408 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:20:12" (3/4) ... [2024-11-14 04:21:40,410 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-14 04:21:40,418 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2024-11-14 04:21:40,418 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2024-11-14 04:21:40,420 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2024-11-14 04:21:40,420 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-14 04:21:40,536 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/witness.graphml [2024-11-14 04:21:40,537 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/witness.yml [2024-11-14 04:21:40,537 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-14 04:21:40,538 INFO L158 Benchmark]: Toolchain (without parser) took 89263.17ms. Allocated memory was 142.6MB in the beginning and 755.0MB in the end (delta: 612.4MB). Free memory was 119.0MB in the beginning and 400.9MB in the end (delta: -281.9MB). Peak memory consumption was 328.8MB. Max. memory is 16.1GB. [2024-11-14 04:21:40,539 INFO L158 Benchmark]: CDTParser took 0.55ms. Allocated memory is still 142.6MB. Free memory is still 81.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 04:21:40,540 INFO L158 Benchmark]: CACSL2BoogieTranslator took 280.01ms. Allocated memory is still 142.6MB. Free memory was 119.0MB in the beginning and 108.5MB in the end (delta: 10.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 04:21:40,540 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.84ms. Allocated memory is still 142.6MB. Free memory was 108.5MB in the beginning and 107.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 04:21:40,541 INFO L158 Benchmark]: Boogie Preprocessor took 26.61ms. Allocated memory is still 142.6MB. Free memory was 107.5MB in the beginning and 106.7MB in the end (delta: 776.3kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 04:21:40,542 INFO L158 Benchmark]: RCFGBuilder took 483.92ms. Allocated memory is still 142.6MB. Free memory was 106.7MB in the beginning and 92.4MB in the end (delta: 14.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-14 04:21:40,546 INFO L158 Benchmark]: TraceAbstraction took 88296.63ms. Allocated memory was 142.6MB in the beginning and 755.0MB in the end (delta: 612.4MB). Free memory was 91.9MB in the beginning and 407.7MB in the end (delta: -315.9MB). Peak memory consumption was 295.3MB. Max. memory is 16.1GB. [2024-11-14 04:21:40,547 INFO L158 Benchmark]: Witness Printer took 130.61ms. Allocated memory is still 755.0MB. Free memory was 407.7MB in the beginning and 400.9MB in the end (delta: 6.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 04:21:40,549 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.55ms. Allocated memory is still 142.6MB. Free memory is still 81.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 280.01ms. Allocated memory is still 142.6MB. Free memory was 119.0MB in the beginning and 108.5MB in the end (delta: 10.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.84ms. Allocated memory is still 142.6MB. Free memory was 108.5MB in the beginning and 107.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 26.61ms. Allocated memory is still 142.6MB. Free memory was 107.5MB in the beginning and 106.7MB in the end (delta: 776.3kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 483.92ms. Allocated memory is still 142.6MB. Free memory was 106.7MB in the beginning and 92.4MB in the end (delta: 14.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 88296.63ms. Allocated memory was 142.6MB in the beginning and 755.0MB in the end (delta: 612.4MB). Free memory was 91.9MB in the beginning and 407.7MB in the end (delta: -315.9MB). Peak memory consumption was 295.3MB. Max. memory is 16.1GB. * Witness Printer took 130.61ms. Allocated memory is still 755.0MB. Free memory was 407.7MB in the beginning and 400.9MB in the end (delta: 6.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 88.2s, OverallIterations: 22, TraceHistogramMax: 192, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.1s, AutomataDifference: 9.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 924 SdHoareTripleChecker+Valid, 3.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 924 mSDsluCounter, 541 SdHoareTripleChecker+Invalid, 2.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 28 IncrementalHoareTripleChecker+Unchecked, 391 mSDsCounter, 100 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2131 IncrementalHoareTripleChecker+Invalid, 2259 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 100 mSolverCounterUnsat, 150 mSDtfsCounter, 2131 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6769 GetRequests, 6003 SyntacticMatches, 256 SemanticMatches, 510 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 11033 ImplicationChecksByTransitivity, 25.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1109occurred in iteration=21, InterpolantAutomatonStates: 280, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 22 MinimizatonAttempts, 153 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 12.8s SatisfiabilityAnalysisTime, 39.0s InterpolantComputationTime, 5272 NumberOfCodeBlocks, 4354 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 7167 ConstructedInterpolants, 3 QuantifiedInterpolants, 64916 SizeOfPredicates, 16 NumberOfNonLiveVariables, 7179 ConjunctsInSsa, 225 ConjunctsInUnsatCore, 51 InterpolantComputations, 9 PerfectInterpolantSequences, 247773/452561 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 1.5s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 16, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 47, TOOLS_POST_TIME: 1.1s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 43, TOOLS_QUANTIFIERELIM_TIME: 1.0s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.2s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 84, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 6, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 5, DOMAIN_WIDEN_TIME: 0.1s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 7, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 16, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME: 1.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 1.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 7, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 110, DAG_COMPRESSION_RETAINED_NODES: 51, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-11-14 04:21:40,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e39a51d-b4b5-44c8-b377-9b2ce96c2efd/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE