./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.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_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/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_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/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_7763a034-4713-4091-9f8b-d075235f1141/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 13ad8bc9cfa3954c0bae4db0509cb11733a45600a9e4ff56ca5bdd4aceeb1fc0 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:42:07,193 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:42:07,314 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-14 04:42:07,322 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:42:07,323 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:42:07,367 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:42:07,368 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:42:07,369 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:42:07,369 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:42:07,370 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:42:07,370 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:42:07,372 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:42:07,372 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:42:07,372 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:42:07,372 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:42:07,372 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:42:07,373 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:42:07,373 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:42:07,373 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:42:07,373 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:42:07,373 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:42:07,373 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:42:07,373 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-14 04:42:07,374 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-14 04:42:07,374 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:42:07,374 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:42:07,374 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:42:07,374 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:42:07,374 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:42:07,374 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-14 04:42:07,374 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-14 04:42:07,374 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-14 04:42:07,375 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:42:07,375 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 04:42:07,375 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:42:07,375 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 04:42:07,375 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:42:07,375 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:42:07,376 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:42:07,377 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:42:07,377 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:42:07,377 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:42:07,377 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:42:07,377 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:42:07,378 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:42:07,378 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:42:07,378 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:42:07,378 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:42:07,379 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:42:07,379 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_7763a034-4713-4091-9f8b-d075235f1141/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 -> 13ad8bc9cfa3954c0bae4db0509cb11733a45600a9e4ff56ca5bdd4aceeb1fc0 [2024-11-14 04:42:07,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:42:07,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:42:07,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:42:07,813 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:42:07,813 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:42:07,816 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c Unable to find full path for "g++" [2024-11-14 04:42:09,929 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:42:10,273 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:42:10,274 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c [2024-11-14 04:42:10,295 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/data/d1879feed/5949b02e060142df9198877de9db670c/FLAG99f9a7ab5 [2024-11-14 04:42:10,342 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/data/d1879feed/5949b02e060142df9198877de9db670c [2024-11-14 04:42:10,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:42:10,349 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:42:10,351 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:42:10,351 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:42:10,357 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:42:10,358 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:42:10" (1/1) ... [2024-11-14 04:42:10,360 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36220adf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:42:10, skipping insertion in model container [2024-11-14 04:42:10,360 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:42:10" (1/1) ... [2024-11-14 04:42:10,382 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:42:10,571 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:42:10,583 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:42:10,602 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:42:10,616 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:42:10,617 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:42:10 WrapperNode [2024-11-14 04:42:10,617 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:42:10,618 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:42:10,618 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:42:10,618 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:42:10,626 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:42:10" (1/1) ... [2024-11-14 04:42:10,634 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:42:10" (1/1) ... [2024-11-14 04:42:10,656 INFO L138 Inliner]: procedures = 9, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 82 [2024-11-14 04:42:10,657 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:42:10,658 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:42:10,658 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:42:10,658 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:42:10,668 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:42:10" (1/1) ... [2024-11-14 04:42:10,668 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:42:10" (1/1) ... [2024-11-14 04:42:10,670 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:42:10" (1/1) ... [2024-11-14 04:42:10,670 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:42:10" (1/1) ... [2024-11-14 04:42:10,684 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:42:10" (1/1) ... [2024-11-14 04:42:10,696 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:42:10" (1/1) ... [2024-11-14 04:42:10,700 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:42:10" (1/1) ... [2024-11-14 04:42:10,701 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:42:10" (1/1) ... [2024-11-14 04:42:10,706 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:42:10,707 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:42:10,707 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:42:10,707 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:42:10,708 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:42:10" (1/1) ... [2024-11-14 04:42:10,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:42:10,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:42:10,759 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:42:10,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:42:10,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 04:42:10,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:42:10,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:42:10,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 04:42:10,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 04:42:10,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 04:42:10,887 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:42:10,889 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:42:11,143 INFO L? ?]: Removed 45 outVars from TransFormulas that were not future-live. [2024-11-14 04:42:11,144 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:42:11,215 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:42:11,218 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-14 04:42:11,219 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:42:11 BoogieIcfgContainer [2024-11-14 04:42:11,219 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:42:11,221 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:42:11,222 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:42:11,233 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:42:11,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:42:10" (1/3) ... [2024-11-14 04:42:11,234 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@510c0601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:42:11, skipping insertion in model container [2024-11-14 04:42:11,234 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:42:10" (2/3) ... [2024-11-14 04:42:11,235 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@510c0601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:42:11, skipping insertion in model container [2024-11-14 04:42:11,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:42:11" (3/3) ... [2024-11-14 04:42:11,238 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength2.c [2024-11-14 04:42:11,251 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:42:11,253 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG ArraysOfVariableLength2.c that has 1 procedures, 24 locations, 1 initial locations, 4 loop locations, and 11 error locations. [2024-11-14 04:42:11,294 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:42:11,308 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;@3a59f1b4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:42:11,308 INFO L334 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-11-14 04:42:11,312 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:11,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 04:42:11,318 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:42:11,318 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 04:42:11,319 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:42:11,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:42:11,324 INFO L85 PathProgramCache]: Analyzing trace with hash 3734766, now seen corresponding path program 1 times [2024-11-14 04:42:11,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:42:11,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661682413] [2024-11-14 04:42:11,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:11,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:42:11,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:11,525 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 04:42:11,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:42:11,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661682413] [2024-11-14 04:42:11,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661682413] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:42:11,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:42:11,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:42:11,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129490606] [2024-11-14 04:42:11,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:42:11,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:42:11,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:42:11,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:42:11,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:42:11,572 INFO L87 Difference]: Start difference. First operand has 24 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 04:42:11,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:42:11,669 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2024-11-14 04:42:11,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:42:11,672 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 04:42:11,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:42:11,680 INFO L225 Difference]: With dead ends: 38 [2024-11-14 04:42:11,680 INFO L226 Difference]: Without dead ends: 37 [2024-11-14 04:42:11,682 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 04:42:11,685 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:42:11,686 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 23 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:42:11,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-14 04:42:11,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2024-11-14 04:42:11,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 2.076923076923077) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:11,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-14 04:42:11,723 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 4 [2024-11-14 04:42:11,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:42:11,723 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-14 04:42:11,724 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 04:42:11,724 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-14 04:42:11,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 04:42:11,724 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:42:11,724 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 04:42:11,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:42:11,725 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:42:11,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:42:11,726 INFO L85 PathProgramCache]: Analyzing trace with hash 3644690, now seen corresponding path program 1 times [2024-11-14 04:42:11,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:42:11,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143279273] [2024-11-14 04:42:11,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:11,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:42:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:11,948 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 04:42:11,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:42:11,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143279273] [2024-11-14 04:42:11,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143279273] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:42:11,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:42:11,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:42:11,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484724522] [2024-11-14 04:42:11,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:42:11,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:42:11,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:42:11,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:42:11,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:42:11,955 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:12,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:42:12,126 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2024-11-14 04:42:12,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:42:12,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-14 04:42:12,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:42:12,128 INFO L225 Difference]: With dead ends: 31 [2024-11-14 04:42:12,128 INFO L226 Difference]: Without dead ends: 31 [2024-11-14 04:42:12,128 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:42:12,129 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:42:12,130 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 31 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:42:12,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-14 04:42:12,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2024-11-14 04:42:12,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 14 states have (on average 2.0) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:12,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-11-14 04:42:12,138 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 4 [2024-11-14 04:42:12,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:42:12,138 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-11-14 04:42:12,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:12,141 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-11-14 04:42:12,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 04:42:12,142 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:42:12,142 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 04:42:12,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 04:42:12,143 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:42:12,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:42:12,144 INFO L85 PathProgramCache]: Analyzing trace with hash 113070572, now seen corresponding path program 1 times [2024-11-14 04:42:12,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:42:12,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668846088] [2024-11-14 04:42:12,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:12,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:42:12,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:12,508 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 04:42:12,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:42:12,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668846088] [2024-11-14 04:42:12,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668846088] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:42:12,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:42:12,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:42:12,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403923981] [2024-11-14 04:42:12,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:42:12,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:42:12,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:42:12,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:42:12,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:42:12,511 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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 04:42:12,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:42:12,589 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2024-11-14 04:42:12,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:42:12,589 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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 04:42:12,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:42:12,590 INFO L225 Difference]: With dead ends: 27 [2024-11-14 04:42:12,590 INFO L226 Difference]: Without dead ends: 27 [2024-11-14 04:42:12,590 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:42:12,591 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 36 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:42:12,592 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 13 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:42:12,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-14 04:42:12,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2024-11-14 04:42:12,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 22 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 04:42:12,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-11-14 04:42:12,595 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 5 [2024-11-14 04:42:12,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:42:12,595 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-11-14 04:42:12,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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 04:42:12,596 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-11-14 04:42:12,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 04:42:12,596 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:42:12,596 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 04:42:12,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 04:42:12,597 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:42:12,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:42:12,597 INFO L85 PathProgramCache]: Analyzing trace with hash 113070573, now seen corresponding path program 1 times [2024-11-14 04:42:12,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:42:12,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971698185] [2024-11-14 04:42:12,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:12,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:42:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:12,954 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 04:42:12,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:42:12,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971698185] [2024-11-14 04:42:12,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971698185] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:42:12,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:42:12,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:42:12,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464374049] [2024-11-14 04:42:12,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:42:12,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:42:12,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:42:12,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:42:12,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:42:12,957 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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 04:42:13,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:42:13,104 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2024-11-14 04:42:13,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:42:13,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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 04:42:13,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:42:13,106 INFO L225 Difference]: With dead ends: 28 [2024-11-14 04:42:13,106 INFO L226 Difference]: Without dead ends: 28 [2024-11-14 04:42:13,106 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:42:13,107 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:42:13,108 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:42:13,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-14 04:42:13,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2024-11-14 04:42:13,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:13,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2024-11-14 04:42:13,117 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 5 [2024-11-14 04:42:13,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:42:13,117 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2024-11-14 04:42:13,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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 04:42:13,118 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2024-11-14 04:42:13,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 04:42:13,118 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:42:13,118 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 04:42:13,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 04:42:13,119 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:42:13,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:42:13,120 INFO L85 PathProgramCache]: Analyzing trace with hash 113068602, now seen corresponding path program 1 times [2024-11-14 04:42:13,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:42:13,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336191974] [2024-11-14 04:42:13,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:13,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:42:13,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:13,223 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 04:42:13,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:42:13,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336191974] [2024-11-14 04:42:13,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336191974] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:42:13,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:42:13,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:42:13,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109145090] [2024-11-14 04:42:13,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:42:13,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:42:13,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:42:13,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:42:13,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:42:13,227 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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 04:42:13,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:42:13,301 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2024-11-14 04:42:13,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:42:13,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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 04:42:13,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:42:13,303 INFO L225 Difference]: With dead ends: 24 [2024-11-14 04:42:13,305 INFO L226 Difference]: Without dead ends: 24 [2024-11-14 04:42:13,305 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:42:13,306 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:42:13,306 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 20 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:42:13,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-14 04:42:13,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-14 04:42:13,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:13,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2024-11-14 04:42:13,310 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 5 [2024-11-14 04:42:13,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:42:13,310 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2024-11-14 04:42:13,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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 04:42:13,310 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2024-11-14 04:42:13,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 04:42:13,311 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:42:13,311 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 04:42:13,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 04:42:13,311 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:42:13,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:42:13,312 INFO L85 PathProgramCache]: Analyzing trace with hash 113068603, now seen corresponding path program 1 times [2024-11-14 04:42:13,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:42:13,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142665526] [2024-11-14 04:42:13,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:13,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:42:13,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:13,412 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 04:42:13,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:42:13,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142665526] [2024-11-14 04:42:13,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142665526] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:42:13,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:42:13,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:42:13,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89346829] [2024-11-14 04:42:13,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:42:13,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:42:13,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:42:13,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:42:13,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:42:13,414 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 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 04:42:13,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:42:13,523 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2024-11-14 04:42:13,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:42:13,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 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 04:42:13,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:42:13,525 INFO L225 Difference]: With dead ends: 23 [2024-11-14 04:42:13,525 INFO L226 Difference]: Without dead ends: 23 [2024-11-14 04:42:13,525 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:42:13,526 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:42:13,527 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 32 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:42:13,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-14 04:42:13,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-14 04:42:13,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.625) internal successors, (26), 22 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 04:42:13,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-11-14 04:42:13,533 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 5 [2024-11-14 04:42:13,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:42:13,534 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-11-14 04:42:13,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 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 04:42:13,534 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-11-14 04:42:13,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 04:42:13,534 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:42:13,534 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:42:13,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 04:42:13,535 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:42:13,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:42:13,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1232282711, now seen corresponding path program 1 times [2024-11-14 04:42:13,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:42:13,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598544274] [2024-11-14 04:42:13,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:13,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:42:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:42:13,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:42:13,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598544274] [2024-11-14 04:42:13,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598544274] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:42:13,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387307171] [2024-11-14 04:42:13,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:13,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:42:13,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:42:13,637 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:42:13,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:42:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:13,739 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:42:13,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:42:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:42:13,800 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:42:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:42:13,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387307171] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:42:13,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [327829570] [2024-11-14 04:42:13,869 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 04:42:13,869 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:42:13,874 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:42:13,880 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:42:13,880 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:42:14,495 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:42:17,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [327829570] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:42:17,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:42:17,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 3, 3] total 9 [2024-11-14 04:42:17,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319846372] [2024-11-14 04:42:17,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:42:17,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:42:17,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:42:17,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:42:17,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=52, Unknown=1, NotChecked=0, Total=90 [2024-11-14 04:42:17,349 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:19,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:42:19,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:42:19,750 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2024-11-14 04:42:19,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:42:19,751 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-14 04:42:19,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:42:19,752 INFO L225 Difference]: With dead ends: 29 [2024-11-14 04:42:19,752 INFO L226 Difference]: Without dead ends: 29 [2024-11-14 04:42:19,752 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=37, Invalid=52, Unknown=1, NotChecked=0, Total=90 [2024-11-14 04:42:19,753 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:42:19,753 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 13 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2024-11-14 04:42:19,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-14 04:42:19,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2024-11-14 04:42:19,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:19,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-11-14 04:42:19,757 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 8 [2024-11-14 04:42:19,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:42:19,758 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-11-14 04:42:19,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:19,758 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-11-14 04:42:19,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 04:42:19,760 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:42:19,761 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:42:19,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-14 04:42:19,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:42:19,962 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:42:19,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:42:19,962 INFO L85 PathProgramCache]: Analyzing trace with hash -456734017, now seen corresponding path program 1 times [2024-11-14 04:42:19,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:42:19,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907964250] [2024-11-14 04:42:19,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:19,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:42:20,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:20,239 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 04:42:20,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:42:20,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907964250] [2024-11-14 04:42:20,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907964250] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:42:20,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288872628] [2024-11-14 04:42:20,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:20,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:42:20,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:42:20,243 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:42:20,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:42:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:20,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 04:42:20,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:42:20,402 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 04:42:20,433 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 04:42:20,434 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:42:20,546 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 04:42:20,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288872628] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:42:20,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [677916508] [2024-11-14 04:42:20,550 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 04:42:20,553 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:42:20,553 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:42:20,553 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:42:20,553 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:42:20,871 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:42:24,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [677916508] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:42:24,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:42:24,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 12 [2024-11-14 04:42:24,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714852191] [2024-11-14 04:42:24,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:42:24,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 04:42:24,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:42:24,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 04:42:24,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=133, Unknown=1, NotChecked=0, Total=182 [2024-11-14 04:42:24,034 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:26,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:42:26,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:42:26,347 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2024-11-14 04:42:26,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 04:42:26,348 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-14 04:42:26,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:42:26,349 INFO L225 Difference]: With dead ends: 27 [2024-11-14 04:42:26,349 INFO L226 Difference]: Without dead ends: 27 [2024-11-14 04:42:26,349 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=48, Invalid=133, Unknown=1, NotChecked=0, Total=182 [2024-11-14 04:42:26,350 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:42:26,350 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2024-11-14 04:42:26,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-14 04:42:26,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-14 04:42:26,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.55) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:26,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-14 04:42:26,354 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 9 [2024-11-14 04:42:26,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:42:26,354 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-14 04:42:26,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:26,354 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-14 04:42:26,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 04:42:26,355 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:42:26,355 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:42:26,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 04:42:26,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:42:26,556 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:42:26,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:42:26,556 INFO L85 PathProgramCache]: Analyzing trace with hash -834663102, now seen corresponding path program 1 times [2024-11-14 04:42:26,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:42:26,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471515443] [2024-11-14 04:42:26,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:26,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:42:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:42:26,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:42:26,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471515443] [2024-11-14 04:42:26,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471515443] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:42:26,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:42:26,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:42:26,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811436506] [2024-11-14 04:42:26,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:42:26,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:42:26,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:42:26,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:42:26,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:42:26,603 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:26,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:42:26,644 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2024-11-14 04:42:26,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:42:26,645 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 11 [2024-11-14 04:42:26,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:42:26,645 INFO L225 Difference]: With dead ends: 32 [2024-11-14 04:42:26,646 INFO L226 Difference]: Without dead ends: 32 [2024-11-14 04:42:26,646 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 04:42:26,647 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:42:26,647 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 21 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:42:26,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-14 04:42:26,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2024-11-14 04:42:26,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 28 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 04:42:26,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2024-11-14 04:42:26,650 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 11 [2024-11-14 04:42:26,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:42:26,650 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2024-11-14 04:42:26,651 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 04:42:26,651 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2024-11-14 04:42:26,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 04:42:26,651 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:42:26,652 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:42:26,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 04:42:26,652 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:42:26,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:42:26,652 INFO L85 PathProgramCache]: Analyzing trace with hash -834663101, now seen corresponding path program 1 times [2024-11-14 04:42:26,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:42:26,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467305976] [2024-11-14 04:42:26,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:26,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:42:26,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:42:26,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:42:26,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467305976] [2024-11-14 04:42:26,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467305976] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:42:26,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733793227] [2024-11-14 04:42:26,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:26,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:42:26,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:42:26,788 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:42:26,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:42:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:26,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 04:42:26,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:42:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:42:26,944 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:42:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:42:26,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733793227] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:42:26,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [744593731] [2024-11-14 04:42:26,996 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 04:42:26,996 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:42:26,996 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:42:26,996 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:42:26,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:42:27,378 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:42:30,134 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '735#(and (<= 2 |ULTIMATE.start_foo_~#a~0#1.base|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_foo_~size#1| 1) (<= 0 |ULTIMATE.start_main_~i~2#1|) (<= |ULTIMATE.start_main_~i~2#1| 1) (= |ULTIMATE.start_foo_~#a~0#1.offset| 0) (exists ((|v_ULTIMATE.start_foo_~i~1#1_53| Int) (|v_ULTIMATE.start_foo_~b#1.base_30| Int)) (and (<= 0 |v_ULTIMATE.start_foo_~i~1#1_53|) (<= (select |#length| |v_ULTIMATE.start_foo_~b#1.base_30|) (+ (* |v_ULTIMATE.start_foo_~i~1#1_53| 4) 3)) (<= 2 |v_ULTIMATE.start_foo_~b#1.base_30|) (<= (+ |v_ULTIMATE.start_foo_~i~1#1_53| 1) |ULTIMATE.start_foo_~size#1|))))' at error location [2024-11-14 04:42:30,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:42:30,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:42:30,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-11-14 04:42:30,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985473273] [2024-11-14 04:42:30,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:42:30,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 04:42:30,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:42:30,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 04:42:30,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=182, Unknown=1, NotChecked=0, Total=240 [2024-11-14 04:42:30,137 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:30,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:42:30,343 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2024-11-14 04:42:30,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 04:42:30,344 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-14 04:42:30,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:42:30,345 INFO L225 Difference]: With dead ends: 42 [2024-11-14 04:42:30,345 INFO L226 Difference]: Without dead ends: 42 [2024-11-14 04:42:30,345 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=90, Invalid=289, Unknown=1, NotChecked=0, Total=380 [2024-11-14 04:42:30,346 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 34 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:42:30,346 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 30 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:42:30,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-14 04:42:30,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2024-11-14 04:42:30,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:30,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2024-11-14 04:42:30,357 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 11 [2024-11-14 04:42:30,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:42:30,357 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2024-11-14 04:42:30,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:30,358 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2024-11-14 04:42:30,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-14 04:42:30,358 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:42:30,358 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-14 04:42:30,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 04:42:30,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:42:30,559 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:42:30,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:42:30,560 INFO L85 PathProgramCache]: Analyzing trace with hash -104667203, now seen corresponding path program 1 times [2024-11-14 04:42:30,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:42:30,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532558152] [2024-11-14 04:42:30,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:30,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:42:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:30,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:42:30,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:42:30,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532558152] [2024-11-14 04:42:30,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532558152] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:42:30,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:42:30,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 04:42:30,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481781773] [2024-11-14 04:42:30,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:42:30,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:42:30,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:42:30,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:42:30,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:42:30,722 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:30,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:42:30,789 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2024-11-14 04:42:30,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:42:30,791 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-14 04:42:30,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:42:30,791 INFO L225 Difference]: With dead ends: 33 [2024-11-14 04:42:30,791 INFO L226 Difference]: Without dead ends: 32 [2024-11-14 04:42:30,792 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:42:30,792 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:42:30,793 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 10 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:42:30,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-14 04:42:30,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2024-11-14 04:42:30,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.5) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:30,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2024-11-14 04:42:30,796 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 12 [2024-11-14 04:42:30,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:42:30,797 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2024-11-14 04:42:30,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:30,797 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2024-11-14 04:42:30,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-14 04:42:30,797 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:42:30,798 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:42:30,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-14 04:42:30,798 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:42:30,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:42:30,799 INFO L85 PathProgramCache]: Analyzing trace with hash -104669173, now seen corresponding path program 1 times [2024-11-14 04:42:30,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:42:30,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039855981] [2024-11-14 04:42:30,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:30,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:42:30,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:31,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:42:31,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:42:31,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039855981] [2024-11-14 04:42:31,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039855981] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:42:31,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889022595] [2024-11-14 04:42:31,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:31,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:42:31,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:42:31,022 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:42:31,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:42:31,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:31,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 04:42:31,125 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:42:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:42:31,194 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:42:31,233 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 22 treesize of output 18 [2024-11-14 04:42:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:42:31,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889022595] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:42:31,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1861401561] [2024-11-14 04:42:31,256 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:42:31,256 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:42:31,256 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:42:31,256 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:42:31,257 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:42:31,670 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:42:34,404 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '973#(and (= |ULTIMATE.start_foo_~size#1| |ULTIMATE.start_bar_~size#1|) (<= 2 |ULTIMATE.start_foo_~#a~0#1.base|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_foo_~b#1.base|) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_foo_~i~1#1| 1) (= |ULTIMATE.start_main_~i~2#1| 1) (= |ULTIMATE.start_bar_~res~0#1| 0) (<= (select |#length| |ULTIMATE.start_foo_~#a~0#1.base|) 3) (= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 1 |ULTIMATE.start_bar_~size#1|) (<= |ULTIMATE.start_foo_~size#1| |ULTIMATE.start_foo_~i~1#1|))' at error location [2024-11-14 04:42:34,404 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:42:34,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:42:34,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-14 04:42:34,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428723321] [2024-11-14 04:42:34,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:42:34,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 04:42:34,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:42:34,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 04:42:34,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=224, Unknown=1, NotChecked=0, Total=272 [2024-11-14 04:42:34,408 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 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 04:42:34,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:42:34,554 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2024-11-14 04:42:34,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:42:34,554 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 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 04:42:34,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:42:34,555 INFO L225 Difference]: With dead ends: 35 [2024-11-14 04:42:34,555 INFO L226 Difference]: Without dead ends: 35 [2024-11-14 04:42:34,555 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=53, Invalid=252, Unknown=1, NotChecked=0, Total=306 [2024-11-14 04:42:34,556 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:42:34,556 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 39 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:42:34,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-14 04:42:34,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2024-11-14 04:42:34,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:34,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2024-11-14 04:42:34,559 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 12 [2024-11-14 04:42:34,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:42:34,559 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2024-11-14 04:42:34,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 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 04:42:34,560 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2024-11-14 04:42:34,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 04:42:34,560 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:42:34,560 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:42:34,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 04:42:34,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:42:34,761 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:42:34,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:42:34,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1802771433, now seen corresponding path program 1 times [2024-11-14 04:42:34,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:42:34,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999809651] [2024-11-14 04:42:34,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:34,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:42:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:35,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:42:35,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:42:35,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999809651] [2024-11-14 04:42:35,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999809651] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:42:35,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882114413] [2024-11-14 04:42:35,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:35,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:42:35,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:42:35,280 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:42:35,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:42:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:35,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-14 04:42:35,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:42:35,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 04:42:35,412 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 04:42:35,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:42:35,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-14 04:42:35,479 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 04:42:35,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-14 04:42:35,578 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 04:42:35,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-14 04:42:35,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-14 04:42:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:42:35,733 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:42:35,975 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:42:35,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-14 04:42:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:42:36,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882114413] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:42:36,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1892968010] [2024-11-14 04:42:36,192 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:42:36,193 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:42:36,193 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:42:36,194 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:42:36,194 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:42:44,451 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:42:44,885 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1147#(and (exists ((|v_ULTIMATE.start_foo_~size#1_84| Int) (|v_ULTIMATE.start_foo_~i~1#1_125| Int) (|v_ULTIMATE.start_foo_~#a~0#1.base_91| Int) (|v_#valid_161| (Array Int Int)) (|v_ULTIMATE.start_bar_~res~0#1_95| Int)) (and (<= |v_ULTIMATE.start_bar_~res~0#1_95| 2147483647) (or (and (not (= |v_ULTIMATE.start_bar_~res~0#1_95| 0)) (= |v_ULTIMATE.start_foo_~size#1_84| |ULTIMATE.start_main_#t~ret5#1|) (= |#valid| (store |v_#valid_161| |v_ULTIMATE.start_foo_~#a~0#1.base_91| 0))) (and (= |v_ULTIMATE.start_bar_~res~0#1_95| 0) (= |v_ULTIMATE.start_foo_~i~1#1_125| |ULTIMATE.start_main_#t~ret5#1|) (= |#valid| (store |v_#valid_161| |v_ULTIMATE.start_foo_~#a~0#1.base_91| 0)))) (<= 0 (+ |v_ULTIMATE.start_bar_~res~0#1_95| 2147483648)))) (<= |ULTIMATE.start_main_#t~ret5#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_#t~ret5#1| 2147483648)))' at error location [2024-11-14 04:42:44,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:42:44,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:42:44,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 4] total 16 [2024-11-14 04:42:44,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725345754] [2024-11-14 04:42:44,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:42:44,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-14 04:42:44,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:42:44,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-14 04:42:44,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-11-14 04:42:44,888 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:45,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:42:45,438 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2024-11-14 04:42:45,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 04:42:45,439 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-14 04:42:45,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:42:45,439 INFO L225 Difference]: With dead ends: 73 [2024-11-14 04:42:45,440 INFO L226 Difference]: Without dead ends: 73 [2024-11-14 04:42:45,440 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2024-11-14 04:42:45,442 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 87 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:42:45,442 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 38 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:42:45,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-14 04:42:45,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2024-11-14 04:42:45,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 57 states have (on average 1.5614035087719298) internal successors, (89), 63 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:45,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 89 transitions. [2024-11-14 04:42:45,447 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 89 transitions. Word has length 14 [2024-11-14 04:42:45,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:42:45,447 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 89 transitions. [2024-11-14 04:42:45,447 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:45,448 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 89 transitions. [2024-11-14 04:42:45,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 04:42:45,448 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:42:45,448 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:42:45,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 04:42:45,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:42:45,653 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:42:45,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:42:45,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1802773403, now seen corresponding path program 1 times [2024-11-14 04:42:45,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:42:45,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219283977] [2024-11-14 04:42:45,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:45,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:42:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:45,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:42:45,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:42:45,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219283977] [2024-11-14 04:42:45,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219283977] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:42:45,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587633177] [2024-11-14 04:42:45,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:45,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:42:45,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:42:45,759 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:42:45,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:42:45,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:45,860 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 04:42:45,863 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:42:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:42:45,917 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:42:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:42:45,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587633177] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:42:45,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1681048667] [2024-11-14 04:42:45,961 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:42:45,962 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:42:45,962 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:42:45,962 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:42:45,962 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:42:49,571 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:42:49,967 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1390#(<= 1 |ULTIMATE.start_bar_~size#1|)' at error location [2024-11-14 04:42:49,967 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:42:49,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:42:49,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2024-11-14 04:42:49,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42475384] [2024-11-14 04:42:49,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:42:49,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 04:42:49,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:42:49,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 04:42:49,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2024-11-14 04:42:49,969 INFO L87 Difference]: Start difference. First operand 64 states and 89 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:50,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:42:50,131 INFO L93 Difference]: Finished difference Result 63 states and 86 transitions. [2024-11-14 04:42:50,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 04:42:50,132 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-14 04:42:50,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:42:50,133 INFO L225 Difference]: With dead ends: 63 [2024-11-14 04:42:50,133 INFO L226 Difference]: Without dead ends: 63 [2024-11-14 04:42:50,134 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2024-11-14 04:42:50,134 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:42:50,134 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 42 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:42:50,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-14 04:42:50,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-11-14 04:42:50,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 56 states have (on average 1.5357142857142858) internal successors, (86), 62 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:50,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 86 transitions. [2024-11-14 04:42:50,143 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 86 transitions. Word has length 14 [2024-11-14 04:42:50,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:42:50,143 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 86 transitions. [2024-11-14 04:42:50,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:50,143 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 86 transitions. [2024-11-14 04:42:50,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 04:42:50,144 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:42:50,144 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:42:50,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 04:42:50,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 04:42:50,345 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:42:50,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:42:50,345 INFO L85 PathProgramCache]: Analyzing trace with hash -2091488787, now seen corresponding path program 1 times [2024-11-14 04:42:50,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:42:50,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682507669] [2024-11-14 04:42:50,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:50,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:42:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:50,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:42:50,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:42:50,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682507669] [2024-11-14 04:42:50,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682507669] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:42:50,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865731541] [2024-11-14 04:42:50,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:50,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:42:50,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:42:50,609 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:42:50,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 04:42:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:50,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 04:42:50,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:42:50,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:42:50,776 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:42:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:42:50,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865731541] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:42:50,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [779534207] [2024-11-14 04:42:50,827 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 04:42:50,827 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:42:50,827 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:42:50,827 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:42:50,827 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:42:54,062 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:42:54,331 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1533#true' at error location [2024-11-14 04:42:54,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:42:54,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:42:54,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2024-11-14 04:42:54,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439724326] [2024-11-14 04:42:54,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:42:54,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 04:42:54,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:42:54,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 04:42:54,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2024-11-14 04:42:54,333 INFO L87 Difference]: Start difference. First operand 63 states and 86 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:54,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:42:54,881 INFO L93 Difference]: Finished difference Result 111 states and 135 transitions. [2024-11-14 04:42:54,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-14 04:42:54,882 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-14 04:42:54,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:42:54,883 INFO L225 Difference]: With dead ends: 111 [2024-11-14 04:42:54,883 INFO L226 Difference]: Without dead ends: 111 [2024-11-14 04:42:54,884 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=364, Invalid=1276, Unknown=0, NotChecked=0, Total=1640 [2024-11-14 04:42:54,885 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 184 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:42:54,885 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 26 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:42:54,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-14 04:42:54,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 73. [2024-11-14 04:42:54,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 67 states have (on average 1.537313432835821) internal successors, (103), 72 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 04:42:54,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 103 transitions. [2024-11-14 04:42:54,891 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 103 transitions. Word has length 17 [2024-11-14 04:42:54,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:42:54,891 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 103 transitions. [2024-11-14 04:42:54,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:54,891 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 103 transitions. [2024-11-14 04:42:54,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 04:42:54,892 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:42:54,892 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-14 04:42:54,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 04:42:55,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 04:42:55,096 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:42:55,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:42:55,096 INFO L85 PathProgramCache]: Analyzing trace with hash -2091578864, now seen corresponding path program 1 times [2024-11-14 04:42:55,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:42:55,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586729919] [2024-11-14 04:42:55,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:55,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:42:55,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:55,202 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:42:55,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:42:55,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586729919] [2024-11-14 04:42:55,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586729919] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:42:55,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:42:55,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:42:55,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627294644] [2024-11-14 04:42:55,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:42:55,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:42:55,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:42:55,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:42:55,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:42:55,205 INFO L87 Difference]: Start difference. First operand 73 states and 103 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:55,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:42:55,240 INFO L93 Difference]: Finished difference Result 72 states and 99 transitions. [2024-11-14 04:42:55,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:42:55,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-14 04:42:55,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:42:55,241 INFO L225 Difference]: With dead ends: 72 [2024-11-14 04:42:55,242 INFO L226 Difference]: Without dead ends: 72 [2024-11-14 04:42:55,242 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 04:42:55,243 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:42:55,243 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 11 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:42:55,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-14 04:42:55,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2024-11-14 04:42:55,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.4444444444444444) internal successors, (91), 67 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:55,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 91 transitions. [2024-11-14 04:42:55,252 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 91 transitions. Word has length 17 [2024-11-14 04:42:55,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:42:55,252 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 91 transitions. [2024-11-14 04:42:55,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:55,252 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 91 transitions. [2024-11-14 04:42:55,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 04:42:55,252 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:42:55,252 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-14 04:42:55,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-14 04:42:55,253 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:42:55,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:42:55,253 INFO L85 PathProgramCache]: Analyzing trace with hash -2091578863, now seen corresponding path program 1 times [2024-11-14 04:42:55,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:42:55,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36906074] [2024-11-14 04:42:55,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:55,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:42:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:42:55,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:42:55,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36906074] [2024-11-14 04:42:55,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36906074] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:42:55,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109456152] [2024-11-14 04:42:55,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:55,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:42:55,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:42:55,565 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:42:55,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 04:42:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:55,693 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-14 04:42:55,695 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:42:55,705 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 04:42:55,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 04:42:55,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:42:55,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-14 04:42:55,745 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 04:42:55,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-14 04:42:55,794 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 04:42:55,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-14 04:42:55,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-14 04:42:55,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:42:55,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-14 04:42:55,896 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 04:42:55,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-14 04:42:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:42:55,925 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:42:56,054 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:42:56,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2024-11-14 04:42:56,218 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:42:56,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2024-11-14 04:42:56,304 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 04:42:56,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109456152] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:42:56,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1524754816] [2024-11-14 04:42:56,306 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:42:56,306 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:42:56,306 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:42:56,306 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:42:56,306 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:43:05,801 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:43:06,336 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2132#(exists ((|v_ULTIMATE.start_foo_~b#1.base_139| Int) (|v_ULTIMATE.start_foo_~b#1.offset_162| Int) (|v_ULTIMATE.start_foo_~i~1#1_292| Int)) (and (or (and (<= 0 (+ 392 |ULTIMATE.start_main_~#b~0#1.offset|)) (<= 0 |v_ULTIMATE.start_foo_~b#1.offset_162|) (<= |ULTIMATE.start_foo_~size#1| 99) (= |ULTIMATE.start_foo_~#a~0#1.offset| 0) (<= |ULTIMATE.start_main_~i~2#1| 99) (<= 1 |v_ULTIMATE.start_foo_~i~1#1_292|)) (and (<= 0 (+ 392 |v_ULTIMATE.start_foo_~b#1.offset_162|)) (<= 0 (+ 392 |ULTIMATE.start_main_~#b~0#1.offset|)) (<= |ULTIMATE.start_foo_~size#1| 99) (= |ULTIMATE.start_foo_~#a~0#1.offset| 0) (= |v_ULTIMATE.start_foo_~i~1#1_292| 0) (<= |ULTIMATE.start_main_~i~2#1| 99))) (<= (+ |v_ULTIMATE.start_foo_~i~1#1_292| 1) |ULTIMATE.start_foo_~size#1|) (or (= |v_ULTIMATE.start_foo_~i~1#1_292| 0) (and (<= (* |v_ULTIMATE.start_foo_~i~1#1_292| 4) (select |#length| |ULTIMATE.start_foo_~#a~0#1.base|)) (= (select |#valid| |ULTIMATE.start_foo_~#a~0#1.base|) 1) (exists ((|v_#memory_int_183| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_183| |ULTIMATE.start_foo_~#a~0#1.base| (store (select |v_#memory_int_183| |ULTIMATE.start_foo_~#a~0#1.base|) (+ (- 4) (* |v_ULTIMATE.start_foo_~i~1#1_292| 4)) (select (select |#memory_int| |ULTIMATE.start_foo_~#a~0#1.base|) (+ (- 4) (* |v_ULTIMATE.start_foo_~i~1#1_292| 4))))))))) (or (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_139|) (+ |v_ULTIMATE.start_foo_~b#1.offset_162| 4 (* |v_ULTIMATE.start_foo_~i~1#1_292| 4))) (< (+ |v_ULTIMATE.start_foo_~b#1.offset_162| (* |v_ULTIMATE.start_foo_~i~1#1_292| 4)) 0))))' at error location [2024-11-14 04:43:06,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:43:06,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:43:06,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 3] total 12 [2024-11-14 04:43:06,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324880821] [2024-11-14 04:43:06,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:43:06,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 04:43:06,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:43:06,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 04:43:06,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2024-11-14 04:43:06,339 INFO L87 Difference]: Start difference. First operand 68 states and 91 transitions. Second operand has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:06,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:43:06,732 INFO L93 Difference]: Finished difference Result 110 states and 155 transitions. [2024-11-14 04:43:06,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 04:43:06,736 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-14 04:43:06,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:43:06,737 INFO L225 Difference]: With dead ends: 110 [2024-11-14 04:43:06,737 INFO L226 Difference]: Without dead ends: 110 [2024-11-14 04:43:06,738 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2024-11-14 04:43:06,739 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 114 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:43:06,739 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 10 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:43:06,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-14 04:43:06,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 84. [2024-11-14 04:43:06,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.4556962025316456) internal successors, (115), 83 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:06,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 115 transitions. [2024-11-14 04:43:06,745 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 115 transitions. Word has length 17 [2024-11-14 04:43:06,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:43:06,745 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 115 transitions. [2024-11-14 04:43:06,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:06,746 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 115 transitions. [2024-11-14 04:43:06,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-14 04:43:06,746 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:43:06,746 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-14 04:43:06,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-14 04:43:06,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 04:43:06,951 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:43:06,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:43:06,951 INFO L85 PathProgramCache]: Analyzing trace with hash -414435351, now seen corresponding path program 1 times [2024-11-14 04:43:06,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:43:06,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535623704] [2024-11-14 04:43:06,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:43:06,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:43:06,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:43:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:43:07,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:43:07,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535623704] [2024-11-14 04:43:07,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535623704] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:43:07,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287881056] [2024-11-14 04:43:07,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:43:07,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:43:07,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:43:07,186 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:43:07,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 04:43:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:43:07,323 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 04:43:07,325 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:43:07,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 04:43:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:43:07,396 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:43:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:43:07,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287881056] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:43:07,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1640748115] [2024-11-14 04:43:07,536 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:43:07,536 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:43:07,536 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:43:07,537 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:43:07,537 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:43:11,358 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:43:11,769 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2462#(and (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (<= 0 (+ 392 |ULTIMATE.start_main_~#b~0#1.offset|)) (<= |ULTIMATE.start_foo_~size#1| 99) (<= |ULTIMATE.start_main_~i~2#1| 99) (<= 1 |ULTIMATE.start_foo_~size#1|))' at error location [2024-11-14 04:43:11,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:43:11,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:43:11,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-14 04:43:11,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223092967] [2024-11-14 04:43:11,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:43:11,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 04:43:11,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:43:11,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 04:43:11,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2024-11-14 04:43:11,771 INFO L87 Difference]: Start difference. First operand 84 states and 115 transitions. Second operand has 11 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:12,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:43:12,213 INFO L93 Difference]: Finished difference Result 111 states and 135 transitions. [2024-11-14 04:43:12,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 04:43:12,214 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-14 04:43:12,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:43:12,215 INFO L225 Difference]: With dead ends: 111 [2024-11-14 04:43:12,215 INFO L226 Difference]: Without dead ends: 111 [2024-11-14 04:43:12,215 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2024-11-14 04:43:12,216 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 123 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:43:12,216 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 45 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:43:12,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-14 04:43:12,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2024-11-14 04:43:12,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.4096385542168675) internal successors, (117), 87 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:12,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 117 transitions. [2024-11-14 04:43:12,222 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 117 transitions. Word has length 18 [2024-11-14 04:43:12,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:43:12,222 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 117 transitions. [2024-11-14 04:43:12,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:12,222 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 117 transitions. [2024-11-14 04:43:12,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-14 04:43:12,223 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:43:12,223 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-14 04:43:12,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 04:43:12,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 04:43:12,428 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:43:12,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:43:12,428 INFO L85 PathProgramCache]: Analyzing trace with hash -414352131, now seen corresponding path program 2 times [2024-11-14 04:43:12,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:43:12,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011504381] [2024-11-14 04:43:12,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:43:12,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:43:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:43:12,588 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:43:12,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:43:12,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011504381] [2024-11-14 04:43:12,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011504381] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:43:12,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509692532] [2024-11-14 04:43:12,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:43:12,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:43:12,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:43:12,591 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:43:12,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 04:43:12,705 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-14 04:43:12,705 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:43:12,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 04:43:12,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:43:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 04:43:12,743 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:43:12,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509692532] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:43:12,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:43:12,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2024-11-14 04:43:12,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176714097] [2024-11-14 04:43:12,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:43:12,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:43:12,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:43:12,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:43:12,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:43:12,745 INFO L87 Difference]: Start difference. First operand 88 states and 117 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:12,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:43:12,809 INFO L93 Difference]: Finished difference Result 88 states and 113 transitions. [2024-11-14 04:43:12,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:43:12,810 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-14 04:43:12,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:43:12,810 INFO L225 Difference]: With dead ends: 88 [2024-11-14 04:43:12,811 INFO L226 Difference]: Without dead ends: 84 [2024-11-14 04:43:12,811 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-14 04:43:12,811 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:43:12,812 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 25 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:43:12,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-14 04:43:12,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-11-14 04:43:12,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.3670886075949367) internal successors, (108), 83 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:12,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 108 transitions. [2024-11-14 04:43:12,816 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 108 transitions. Word has length 18 [2024-11-14 04:43:12,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:43:12,816 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 108 transitions. [2024-11-14 04:43:12,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:12,817 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 108 transitions. [2024-11-14 04:43:12,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-14 04:43:12,817 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:43:12,818 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2024-11-14 04:43:12,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 04:43:13,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:43:13,022 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:43:13,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:43:13,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1605768047, now seen corresponding path program 2 times [2024-11-14 04:43:13,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:43:13,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429506995] [2024-11-14 04:43:13,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:43:13,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:43:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:43:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:43:13,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:43:13,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429506995] [2024-11-14 04:43:13,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429506995] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:43:13,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022451953] [2024-11-14 04:43:13,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:43:13,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:43:13,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:43:13,193 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:43:13,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 04:43:13,323 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 04:43:13,324 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:43:13,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 04:43:13,328 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:43:13,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:43:13,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 04:43:13,380 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 04:43:13,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-14 04:43:13,483 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 04:43:13,483 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:43:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 04:43:13,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022451953] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:43:13,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1644764347] [2024-11-14 04:43:13,711 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:43:13,712 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:43:13,712 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:43:13,712 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:43:13,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:43:17,130 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:43:17,861 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3067#(exists ((|v_ULTIMATE.start_foo_~b#1.offset_227| Int) (|v_ULTIMATE.start_foo_~b#1.base_192| Int) (|v_ULTIMATE.start_foo_~i~1#1_408| Int)) (and (or (= |v_ULTIMATE.start_foo_~i~1#1_408| 0) (and (<= (* |v_ULTIMATE.start_foo_~i~1#1_408| 4) (select |#length| |ULTIMATE.start_foo_~#a~0#1.base|)) (exists ((|v_#memory_int_251| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_251| |ULTIMATE.start_foo_~#a~0#1.base| (store (select |v_#memory_int_251| |ULTIMATE.start_foo_~#a~0#1.base|) (+ (* |v_ULTIMATE.start_foo_~i~1#1_408| 4) (- 4)) (select (select |#memory_int| |ULTIMATE.start_foo_~#a~0#1.base|) (+ (* |v_ULTIMATE.start_foo_~i~1#1_408| 4) (- 4))))))) (= (select |#valid| |ULTIMATE.start_foo_~#a~0#1.base|) 1))) (or (< (select |#length| |v_ULTIMATE.start_foo_~b#1.base_192|) (+ (* |v_ULTIMATE.start_foo_~i~1#1_408| 4) |v_ULTIMATE.start_foo_~b#1.offset_227| 4)) (< (+ (* |v_ULTIMATE.start_foo_~i~1#1_408| 4) |v_ULTIMATE.start_foo_~b#1.offset_227|) 0)) (<= (+ |v_ULTIMATE.start_foo_~i~1#1_408| 1) |ULTIMATE.start_foo_~size#1|) (or (and (<= 0 (+ 392 |ULTIMATE.start_main_~#b~0#1.offset|)) (= |v_ULTIMATE.start_foo_~i~1#1_408| 0) (<= |ULTIMATE.start_foo_~size#1| 99) (= |ULTIMATE.start_foo_~#a~0#1.offset| 0) (<= 0 (+ 392 |v_ULTIMATE.start_foo_~b#1.offset_227|)) (<= |ULTIMATE.start_main_~i~2#1| 99)) (and (<= 1 |v_ULTIMATE.start_foo_~i~1#1_408|) (<= 0 |v_ULTIMATE.start_foo_~b#1.offset_227|) (<= 0 (+ 392 |ULTIMATE.start_main_~#b~0#1.offset|)) (<= |ULTIMATE.start_foo_~size#1| 99) (= |ULTIMATE.start_foo_~#a~0#1.offset| 0) (<= |ULTIMATE.start_main_~i~2#1| 99)))))' at error location [2024-11-14 04:43:17,861 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:43:17,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:43:17,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2024-11-14 04:43:17,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442327058] [2024-11-14 04:43:17,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:43:17,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-14 04:43:17,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:43:17,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-14 04:43:17,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2024-11-14 04:43:17,863 INFO L87 Difference]: Start difference. First operand 84 states and 108 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:18,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:43:18,625 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2024-11-14 04:43:18,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 04:43:18,626 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-14 04:43:18,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:43:18,627 INFO L225 Difference]: With dead ends: 82 [2024-11-14 04:43:18,627 INFO L226 Difference]: Without dead ends: 82 [2024-11-14 04:43:18,627 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=306, Invalid=1416, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 04:43:18,628 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 110 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:43:18,628 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 21 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:43:18,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-14 04:43:18,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73. [2024-11-14 04:43:18,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 72 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:18,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2024-11-14 04:43:18,632 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 23 [2024-11-14 04:43:18,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:43:18,633 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2024-11-14 04:43:18,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:18,633 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2024-11-14 04:43:18,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-14 04:43:18,635 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:43:18,635 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1] [2024-11-14 04:43:18,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 04:43:18,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:43:18,835 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:43:18,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:43:18,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1525802629, now seen corresponding path program 3 times [2024-11-14 04:43:18,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:43:18,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721245504] [2024-11-14 04:43:18,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:43:18,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:43:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:43:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:43:18,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:43:18,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721245504] [2024-11-14 04:43:18,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721245504] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:43:18,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161260612] [2024-11-14 04:43:18,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:43:18,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:43:18,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:43:18,996 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:43:18,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 04:43:19,127 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:43:19,127 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:43:19,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 04:43:19,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:43:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 04:43:19,232 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:43:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 04:43:19,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161260612] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:43:19,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1164612359] [2024-11-14 04:43:19,387 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:43:19,387 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:43:19,388 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:43:19,388 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:43:19,388 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:43:29,807 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:43:30,406 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3414#(and (exists ((|v_ULTIMATE.start_bar_~b#1.base_290| Int) (|v_ULTIMATE.start_bar_~b#1.offset_293| Int) (|v_ULTIMATE.start_bar_~i~0#1_336| Int)) (and (<= 0 |v_ULTIMATE.start_bar_~i~0#1_336|) (or (< (+ (* |v_ULTIMATE.start_bar_~i~0#1_336| 4) |v_ULTIMATE.start_bar_~b#1.offset_293|) 0) (< (select |#length| |v_ULTIMATE.start_bar_~b#1.base_290|) (+ (* |v_ULTIMATE.start_bar_~i~0#1_336| 4) |v_ULTIMATE.start_bar_~b#1.offset_293| 4))))) (<= 1 |ULTIMATE.start_bar_~size#1|))' at error location [2024-11-14 04:43:30,406 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:43:30,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:43:30,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2024-11-14 04:43:30,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435722172] [2024-11-14 04:43:30,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:43:30,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-14 04:43:30,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:43:30,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-14 04:43:30,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2024-11-14 04:43:30,408 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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 04:43:31,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:43:31,056 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2024-11-14 04:43:31,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 04:43:31,057 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-14 04:43:31,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:43:31,057 INFO L225 Difference]: With dead ends: 77 [2024-11-14 04:43:31,058 INFO L226 Difference]: Without dead ends: 77 [2024-11-14 04:43:31,058 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2024-11-14 04:43:31,059 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 24 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:43:31,059 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 9 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:43:31,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-14 04:43:31,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2024-11-14 04:43:31,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:31,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2024-11-14 04:43:31,066 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 23 [2024-11-14 04:43:31,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:43:31,068 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2024-11-14 04:43:31,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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 04:43:31,068 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2024-11-14 04:43:31,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-14 04:43:31,072 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:43:31,072 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 1, 1] [2024-11-14 04:43:31,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-14 04:43:31,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-14 04:43:31,273 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:43:31,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:43:31,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1897284773, now seen corresponding path program 2 times [2024-11-14 04:43:31,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:43:31,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488447095] [2024-11-14 04:43:31,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:43:31,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:43:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:43:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 04:43:31,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:43:31,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488447095] [2024-11-14 04:43:31,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488447095] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:43:31,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693869667] [2024-11-14 04:43:31,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:43:31,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:43:31,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:43:31,587 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:43:31,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 04:43:31,726 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-14 04:43:31,726 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:43:31,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-14 04:43:31,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:43:31,839 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 04:43:32,048 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-14 04:43:32,048 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:43:32,452 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-14 04:43:32,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693869667] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:43:32,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [195782653] [2024-11-14 04:43:32,454 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:43:32,454 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:43:32,455 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:43:32,455 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:43:32,455 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:43:36,953 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:43:37,411 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3803#(and (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (<= 0 (+ 392 |ULTIMATE.start_main_~#b~0#1.offset|)) (<= |ULTIMATE.start_foo_~size#1| 99) (<= |ULTIMATE.start_main_~i~2#1| 99) (<= 1 |ULTIMATE.start_foo_~size#1|))' at error location [2024-11-14 04:43:37,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:43:37,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:43:37,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 15 [2024-11-14 04:43:37,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938628311] [2024-11-14 04:43:37,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:43:37,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 04:43:37,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:43:37,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 04:43:37,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2024-11-14 04:43:37,413 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:38,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:43:38,014 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2024-11-14 04:43:38,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 04:43:38,015 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-14 04:43:38,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:43:38,016 INFO L225 Difference]: With dead ends: 80 [2024-11-14 04:43:38,016 INFO L226 Difference]: Without dead ends: 80 [2024-11-14 04:43:38,016 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=220, Invalid=1040, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 04:43:38,018 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 34 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:43:38,019 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 17 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:43:38,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-14 04:43:38,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2024-11-14 04:43:38,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 76 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:38,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2024-11-14 04:43:38,022 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 33 [2024-11-14 04:43:38,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:43:38,023 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2024-11-14 04:43:38,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:38,023 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2024-11-14 04:43:38,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-14 04:43:38,024 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:43:38,024 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 5, 5, 5, 4, 1, 1] [2024-11-14 04:43:38,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 04:43:38,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:43:38,229 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:43:38,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:43:38,229 INFO L85 PathProgramCache]: Analyzing trace with hash 103871227, now seen corresponding path program 2 times [2024-11-14 04:43:38,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:43:38,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882500622] [2024-11-14 04:43:38,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:43:38,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:43:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:43:38,726 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 132 proven. 27 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 04:43:38,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:43:38,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882500622] [2024-11-14 04:43:38,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882500622] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:43:38,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494262246] [2024-11-14 04:43:38,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:43:38,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:43:38,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:43:38,729 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:43:38,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 04:43:39,008 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 04:43:39,008 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:43:39,011 INFO L255 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 04:43:39,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:43:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 133 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-14 04:43:39,191 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:43:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 136 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-14 04:43:39,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494262246] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:43:39,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [599525769] [2024-11-14 04:43:39,372 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:43:39,372 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:43:39,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:43:39,373 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:43:39,373 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:43:41,646 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:43:42,336 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4342#(and (exists ((|v_ULTIMATE.start_foo_~b#1.offset_313| Int) (|v_ULTIMATE.start_foo_~i~1#1_571| Int) (|v_#valid_546| (Array Int Int)) (|v_ULTIMATE.start_bar_~b#1.base_354| Int) (|v_ULTIMATE.start_bar_~b#1.offset_358| Int) (|v_ULTIMATE.start_main_~i~2#1_200| Int) (|v_ULTIMATE.start_main_~#b~0#1.base_31| Int) (|v_ULTIMATE.start_bar_~size#1_341| Int) (|v_ULTIMATE.start_bar_~res~0#1_409| Int) (|v_ULTIMATE.start_foo_~#a~0#1.base_359| Int) (|v_ULTIMATE.start_main_~#b~0#1.offset_25| Int) (|v_ULTIMATE.start_foo_~size#1_350| Int) (|v_ULTIMATE.start_bar_~i~0#1_413| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_31|) (+ |v_ULTIMATE.start_main_~#b~0#1.offset_25| 4 (* |v_ULTIMATE.start_main_~i~2#1_200| 4))) (< (+ |v_ULTIMATE.start_main_~#b~0#1.offset_25| (* |v_ULTIMATE.start_main_~i~2#1_200| 4)) 0)) (or (and (= (store |v_#valid_546| |v_ULTIMATE.start_foo_~#a~0#1.base_359| 0) |#valid|) (= |v_ULTIMATE.start_bar_~res~0#1_409| 0) (= |v_ULTIMATE.start_foo_~i~1#1_571| |ULTIMATE.start_main_#t~ret5#1|)) (and (= (store |v_#valid_546| |v_ULTIMATE.start_foo_~#a~0#1.base_359| 0) |#valid|) (not (= |v_ULTIMATE.start_bar_~res~0#1_409| 0)) (= |ULTIMATE.start_main_#t~ret5#1| |v_ULTIMATE.start_foo_~size#1_350|))) (<= |v_ULTIMATE.start_bar_~res~0#1_409| 2147483647) (or (and (= |v_ULTIMATE.start_bar_~res~0#1_409| 0) (<= 0 (+ 392 |v_ULTIMATE.start_foo_~b#1.offset_313|)) (= |v_ULTIMATE.start_bar_~i~0#1_413| 0) (<= 0 (+ |v_ULTIMATE.start_main_~#b~0#1.offset_25| 392)) (= |v_ULTIMATE.start_bar_~b#1.offset_358| 0) (<= 0 |v_ULTIMATE.start_foo_~i~1#1_571|)) (< 0 |v_ULTIMATE.start_bar_~size#1_341|)) (<= |v_ULTIMATE.start_bar_~size#1_341| |v_ULTIMATE.start_bar_~i~0#1_413|) (<= 0 (+ |v_ULTIMATE.start_bar_~res~0#1_409| 2147483648)) (or (and (<= 4 (+ (* |v_ULTIMATE.start_bar_~i~0#1_413| 4) |v_ULTIMATE.start_bar_~b#1.offset_358|)) (= (select |v_#valid_546| |v_ULTIMATE.start_bar_~b#1.base_354|) 1) (<= (+ (* |v_ULTIMATE.start_bar_~i~0#1_413| 4) |v_ULTIMATE.start_bar_~b#1.offset_358|) (select |#length| |v_ULTIMATE.start_bar_~b#1.base_354|))) (and (= |v_ULTIMATE.start_bar_~i~0#1_413| 0) (= |v_ULTIMATE.start_foo_~size#1_350| |v_ULTIMATE.start_bar_~size#1_341|) (= |v_ULTIMATE.start_bar_~b#1.base_354| |v_ULTIMATE.start_foo_~#a~0#1.base_359|))))) (<= |ULTIMATE.start_main_#t~ret5#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_#t~ret5#1| 2147483648)))' at error location [2024-11-14 04:43:42,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:43:42,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:43:42,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 19 [2024-11-14 04:43:42,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905266506] [2024-11-14 04:43:42,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:43:42,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 04:43:42,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:43:42,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 04:43:42,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=562, Unknown=1, NotChecked=0, Total=650 [2024-11-14 04:43:42,339 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:43,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:43:43,040 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2024-11-14 04:43:43,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 04:43:43,041 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2024-11-14 04:43:43,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:43:43,042 INFO L225 Difference]: With dead ends: 92 [2024-11-14 04:43:43,042 INFO L226 Difference]: Without dead ends: 92 [2024-11-14 04:43:43,042 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 147 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=283, Invalid=1438, Unknown=1, NotChecked=0, Total=1722 [2024-11-14 04:43:43,043 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 33 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:43:43,043 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 23 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:43:43,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-14 04:43:43,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2024-11-14 04:43:43,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 84 states have (on average 1.130952380952381) internal successors, (95), 85 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 04:43:43,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2024-11-14 04:43:43,046 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 56 [2024-11-14 04:43:43,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:43:43,046 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2024-11-14 04:43:43,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:43,046 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2024-11-14 04:43:43,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-14 04:43:43,047 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:43:43,047 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 5, 5, 5, 4, 1, 1] [2024-11-14 04:43:43,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 04:43:43,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:43:43,252 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:43:43,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:43:43,252 INFO L85 PathProgramCache]: Analyzing trace with hash 282181219, now seen corresponding path program 3 times [2024-11-14 04:43:43,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:43:43,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298385110] [2024-11-14 04:43:43,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:43:43,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:43:43,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:43:43,613 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 160 proven. 70 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-14 04:43:43,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:43:43,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298385110] [2024-11-14 04:43:43,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298385110] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:43:43,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253372092] [2024-11-14 04:43:43,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:43:43,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:43:43,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:43:43,617 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:43:43,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 04:43:44,722 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:43:44,723 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:43:44,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 04:43:44,733 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:43:44,895 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 194 proven. 11 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-14 04:43:44,895 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:43:45,034 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 194 proven. 11 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-14 04:43:45,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253372092] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:43:45,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1318813508] [2024-11-14 04:43:45,036 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:43:45,036 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:43:45,036 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:43:45,036 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:43:45,036 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:43:47,018 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:43:50,181 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4942#(and (exists ((|v_ULTIMATE.start_foo_~i~1#1_610| Int) (|v_#valid_576| (Array Int Int)) (|v_ULTIMATE.start_foo_~b#1.offset_334| Int) (|v_ULTIMATE.start_foo_~b#1.base_285| Int) (|v_ULTIMATE.start_bar_~b#1.base_375| Int) (|v_ULTIMATE.start_bar_~b#1.offset_379| Int) (|v_ULTIMATE.start_main_~i~2#1_210| Int) (|v_ULTIMATE.start_bar_~size#1_361| Int) (|v_ULTIMATE.start_main_~#b~0#1.base_32| Int) (|v_ULTIMATE.start_foo_~size#1_369| Int) (|v_ULTIMATE.start_foo_~#a~0#1.base_378| Int) (|v_ULTIMATE.start_main_~#b~0#1.offset_26| Int) (|v_ULTIMATE.start_bar_~res~0#1_435| Int) (|v_ULTIMATE.start_bar_~i~0#1_442| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_32|) (+ |v_ULTIMATE.start_main_~#b~0#1.offset_26| 4 (* |v_ULTIMATE.start_main_~i~2#1_210| 4))) (< (+ |v_ULTIMATE.start_main_~#b~0#1.offset_26| (* |v_ULTIMATE.start_main_~i~2#1_210| 4)) 0)) (or (and (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_main_~#b~0#1.base_32|) (= |v_ULTIMATE.start_bar_~res~0#1_435| 0) (= |v_ULTIMATE.start_foo_~b#1.offset_334| 0) (<= 2 |v_ULTIMATE.start_foo_~b#1.base_285|) (<= 0 |v_ULTIMATE.start_foo_~i~1#1_610|) (<= 0 |v_ULTIMATE.start_bar_~size#1_361|) (= |v_ULTIMATE.start_bar_~b#1.offset_379| 0) (= |v_ULTIMATE.start_bar_~i~0#1_442| 0) (= |v_ULTIMATE.start_main_~#b~0#1.offset_26| 0) (<= 2 |v_ULTIMATE.start_foo_~#a~0#1.base_378|)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_main_~#b~0#1.base_32|) (<= 1 |v_ULTIMATE.start_bar_~size#1_361|) (<= 1 |v_ULTIMATE.start_foo_~size#1_369|) (<= 1 |v_ULTIMATE.start_foo_~i~1#1_610|) (= |v_ULTIMATE.start_foo_~b#1.offset_334| 0) (<= 2 |v_ULTIMATE.start_foo_~b#1.base_285|) (<= 2 |v_ULTIMATE.start_bar_~b#1.base_375|) (= |v_ULTIMATE.start_bar_~b#1.offset_379| 0) (= |v_ULTIMATE.start_main_~#b~0#1.offset_26| 0) (<= 2 |v_ULTIMATE.start_foo_~#a~0#1.base_378|))) (<= |v_ULTIMATE.start_bar_~res~0#1_435| 2147483647) (<= |v_ULTIMATE.start_bar_~size#1_361| |v_ULTIMATE.start_bar_~i~0#1_442|) (<= 0 (+ |v_ULTIMATE.start_bar_~res~0#1_435| 2147483648)) (or (and (= (store |v_#valid_576| |v_ULTIMATE.start_foo_~#a~0#1.base_378| 0) |#valid|) (= |v_ULTIMATE.start_bar_~res~0#1_435| 0) (= |v_ULTIMATE.start_foo_~i~1#1_610| |ULTIMATE.start_main_#t~ret5#1|)) (and (= |ULTIMATE.start_main_#t~ret5#1| |v_ULTIMATE.start_foo_~size#1_369|) (= (store |v_#valid_576| |v_ULTIMATE.start_foo_~#a~0#1.base_378| 0) |#valid|) (not (= |v_ULTIMATE.start_bar_~res~0#1_435| 0)))) (or (and (= |v_ULTIMATE.start_bar_~b#1.base_375| |v_ULTIMATE.start_foo_~#a~0#1.base_378|) (= |v_ULTIMATE.start_foo_~size#1_369| |v_ULTIMATE.start_bar_~size#1_361|) (= |v_ULTIMATE.start_bar_~i~0#1_442| 0)) (and (<= (* |v_ULTIMATE.start_bar_~i~0#1_442| 4) (select |#length| |v_ULTIMATE.start_bar_~b#1.base_375|)) (= (select |v_#valid_576| |v_ULTIMATE.start_bar_~b#1.base_375|) 1) (<= 1 |v_ULTIMATE.start_bar_~i~0#1_442|))))) (<= |ULTIMATE.start_main_#t~ret5#1| 2147483647))' at error location [2024-11-14 04:43:50,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:43:50,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:43:50,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-11-14 04:43:50,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302110839] [2024-11-14 04:43:50,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:43:50,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 04:43:50,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:43:50,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 04:43:50,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=470, Unknown=1, NotChecked=0, Total=552 [2024-11-14 04:43:50,182 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:50,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:43:50,717 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2024-11-14 04:43:50,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 04:43:50,717 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2024-11-14 04:43:50,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:43:50,718 INFO L225 Difference]: With dead ends: 95 [2024-11-14 04:43:50,718 INFO L226 Difference]: Without dead ends: 95 [2024-11-14 04:43:50,719 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 165 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=305, Invalid=1176, Unknown=1, NotChecked=0, Total=1482 [2024-11-14 04:43:50,719 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 38 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:43:50,720 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 12 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:43:50,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-14 04:43:50,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2024-11-14 04:43:50,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 90 states have (on average 1.1222222222222222) internal successors, (101), 91 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:50,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2024-11-14 04:43:50,725 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 62 [2024-11-14 04:43:50,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:43:50,725 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2024-11-14 04:43:50,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:50,726 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2024-11-14 04:43:50,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-14 04:43:50,727 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:43:50,727 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 4, 1, 1] [2024-11-14 04:43:50,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 04:43:50,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:43:50,929 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:43:50,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:43:50,930 INFO L85 PathProgramCache]: Analyzing trace with hash 2014339619, now seen corresponding path program 4 times [2024-11-14 04:43:50,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:43:50,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288708425] [2024-11-14 04:43:50,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:43:50,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:43:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:43:51,341 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 203 proven. 66 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-14 04:43:51,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:43:51,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288708425] [2024-11-14 04:43:51,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288708425] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:43:51,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564152589] [2024-11-14 04:43:51,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:43:51,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:43:51,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:43:51,344 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:43:51,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 04:43:51,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:43:51,606 INFO L255 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 04:43:51,611 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:43:51,822 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 181 proven. 88 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-14 04:43:51,823 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:43:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 181 proven. 88 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-14 04:43:52,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564152589] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:43:52,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [647631463] [2024-11-14 04:43:52,092 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:43:52,092 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:43:52,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:43:52,094 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:43:52,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:43:53,991 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:43:54,235 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5575#(and (<= |ULTIMATE.start_main_#t~ret5#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_#t~ret5#1| 2147483648)) (exists ((|v_ULTIMATE.start_foo_~#a~0#1.base_403| Int) (|v_ULTIMATE.start_foo_~i~1#1_660| Int) (|v_ULTIMATE.start_foo_~size#1_394| Int) (|v_#valid_627| (Array Int Int)) (|v_ULTIMATE.start_bar_~res~0#1_474| Int)) (and (or (and (not (= |v_ULTIMATE.start_bar_~res~0#1_474| 0)) (= |ULTIMATE.start_main_#t~ret5#1| |v_ULTIMATE.start_foo_~size#1_394|) (= (store |v_#valid_627| |v_ULTIMATE.start_foo_~#a~0#1.base_403| 0) |#valid|)) (and (= |v_ULTIMATE.start_foo_~i~1#1_660| |ULTIMATE.start_main_#t~ret5#1|) (= |v_ULTIMATE.start_bar_~res~0#1_474| 0) (= (store |v_#valid_627| |v_ULTIMATE.start_foo_~#a~0#1.base_403| 0) |#valid|))) (<= 0 (+ |v_ULTIMATE.start_bar_~res~0#1_474| 2147483648)) (<= |v_ULTIMATE.start_bar_~res~0#1_474| 2147483647))))' at error location [2024-11-14 04:43:54,236 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:43:54,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:43:54,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2024-11-14 04:43:54,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395356361] [2024-11-14 04:43:54,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:43:54,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 04:43:54,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:43:54,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 04:43:54,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2024-11-14 04:43:54,238 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:54,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:43:54,761 INFO L93 Difference]: Finished difference Result 104 states and 113 transitions. [2024-11-14 04:43:54,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 04:43:54,762 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2024-11-14 04:43:54,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:43:54,762 INFO L225 Difference]: With dead ends: 104 [2024-11-14 04:43:54,762 INFO L226 Difference]: Without dead ends: 104 [2024-11-14 04:43:54,763 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 179 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=268, Invalid=992, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 04:43:54,763 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:43:54,764 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 27 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:43:54,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-14 04:43:54,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2024-11-14 04:43:54,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 96 states have (on average 1.1145833333333333) internal successors, (107), 97 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:54,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2024-11-14 04:43:54,769 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 66 [2024-11-14 04:43:54,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:43:54,770 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2024-11-14 04:43:54,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:54,770 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2024-11-14 04:43:54,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-14 04:43:54,771 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:43:54,771 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 5, 5, 5, 4, 1, 1] [2024-11-14 04:43:54,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-14 04:43:54,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-14 04:43:54,974 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:43:54,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:43:54,974 INFO L85 PathProgramCache]: Analyzing trace with hash 282632251, now seen corresponding path program 5 times [2024-11-14 04:43:54,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:43:54,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358202023] [2024-11-14 04:43:54,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:43:54,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:43:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:43:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 123 proven. 165 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-14 04:43:55,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:43:55,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358202023] [2024-11-14 04:43:55,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358202023] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:43:55,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333761484] [2024-11-14 04:43:55,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:43:55,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:43:55,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:43:55,471 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:43:55,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 04:43:55,914 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 04:43:55,914 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:43:55,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 04:43:55,921 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:43:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 123 proven. 165 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-14 04:43:56,172 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:43:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 123 proven. 165 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-14 04:43:56,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333761484] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:43:56,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1173889731] [2024-11-14 04:43:56,454 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:43:56,454 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:43:56,454 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:43:56,454 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:43:56,455 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:43:59,144 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:44:02,115 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6230#(and (exists ((|v_ULTIMATE.start_bar_~i~0#1_525| Int) (|v_ULTIMATE.start_main_~i~2#1_258| Int) (|v_#valid_670| (Array Int Int)) (|v_ULTIMATE.start_bar_~b#1.base_436| Int) (|v_ULTIMATE.start_main_~#b~0#1.base_34| Int) (|v_ULTIMATE.start_foo_~b#1.offset_389| Int) (|v_ULTIMATE.start_bar_~b#1.offset_440| Int) (|v_ULTIMATE.start_foo_~#a~0#1.base_430| Int) (|v_ULTIMATE.start_main_~#b~0#1.offset_28| Int) (|v_ULTIMATE.start_bar_~res~0#1_514| Int) (|v_ULTIMATE.start_bar_~size#1_414| Int) (|v_ULTIMATE.start_foo_~size#1_421| Int) (|v_ULTIMATE.start_foo_~i~1#1_713| Int)) (and (<= 0 (+ |v_ULTIMATE.start_bar_~res~0#1_514| 2147483648)) (<= |v_ULTIMATE.start_bar_~res~0#1_514| 2147483647) (or (and (= |v_ULTIMATE.start_main_~#b~0#1.offset_28| 0) (= |v_ULTIMATE.start_foo_~b#1.offset_389| 0) (<= 1 |v_ULTIMATE.start_foo_~i~1#1_713|) (<= 0 |v_ULTIMATE.start_main_~i~2#1_258|) (= |v_ULTIMATE.start_bar_~b#1.offset_440| 0) (<= 1 |v_ULTIMATE.start_foo_~size#1_421|)) (and (= |v_ULTIMATE.start_bar_~res~0#1_514| 0) (= |v_ULTIMATE.start_main_~#b~0#1.offset_28| 0) (= |v_ULTIMATE.start_bar_~i~0#1_525| 0) (<= 0 |v_ULTIMATE.start_foo_~i~1#1_713|) (= |v_ULTIMATE.start_foo_~b#1.offset_389| 0) (<= 0 |v_ULTIMATE.start_main_~i~2#1_258|) (= |v_ULTIMATE.start_bar_~b#1.offset_440| 0) (<= 0 |v_ULTIMATE.start_foo_~size#1_421|))) (or (and (= |ULTIMATE.start_main_#t~ret5#1| |v_ULTIMATE.start_foo_~size#1_421|) (= |#valid| (store |v_#valid_670| |v_ULTIMATE.start_foo_~#a~0#1.base_430| 0)) (not (= |v_ULTIMATE.start_bar_~res~0#1_514| 0))) (and (= |v_ULTIMATE.start_foo_~i~1#1_713| |ULTIMATE.start_main_#t~ret5#1|) (= |v_ULTIMATE.start_bar_~res~0#1_514| 0) (= |#valid| (store |v_#valid_670| |v_ULTIMATE.start_foo_~#a~0#1.base_430| 0)))) (or (and (<= 1 |v_ULTIMATE.start_bar_~size#1_414|) (<= (* |v_ULTIMATE.start_bar_~i~0#1_525| 4) (select |#length| |v_ULTIMATE.start_bar_~b#1.base_436|)) (= (select |v_#valid_670| |v_ULTIMATE.start_bar_~b#1.base_436|) 1)) (and (= |v_ULTIMATE.start_bar_~b#1.base_436| |v_ULTIMATE.start_foo_~#a~0#1.base_430|) (= |v_ULTIMATE.start_bar_~i~0#1_525| 0) (= |v_ULTIMATE.start_foo_~size#1_421| |v_ULTIMATE.start_bar_~size#1_414|))) (<= |v_ULTIMATE.start_bar_~size#1_414| |v_ULTIMATE.start_bar_~i~0#1_525|) (<= (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_34|) (+ |v_ULTIMATE.start_main_~#b~0#1.offset_28| (* |v_ULTIMATE.start_main_~i~2#1_258| 4) 3)))) (<= |ULTIMATE.start_main_#t~ret5#1| 2147483647))' at error location [2024-11-14 04:44:02,115 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:44:02,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:44:02,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2024-11-14 04:44:02,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710279859] [2024-11-14 04:44:02,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:44:02,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 04:44:02,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:44:02,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 04:44:02,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=457, Unknown=1, NotChecked=0, Total=552 [2024-11-14 04:44:02,118 INFO L87 Difference]: Start difference. First operand 98 states and 107 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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 04:44:02,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:44:02,507 INFO L93 Difference]: Finished difference Result 104 states and 113 transitions. [2024-11-14 04:44:02,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 04:44:02,507 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2024-11-14 04:44:02,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:44:02,508 INFO L225 Difference]: With dead ends: 104 [2024-11-14 04:44:02,508 INFO L226 Difference]: Without dead ends: 104 [2024-11-14 04:44:02,508 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 185 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=215, Invalid=840, Unknown=1, NotChecked=0, Total=1056 [2024-11-14 04:44:02,509 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:44:02,509 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:44:02,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-14 04:44:02,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2024-11-14 04:44:02,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 100 states have (on average 1.11) internal successors, (111), 101 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:44:02,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2024-11-14 04:44:02,512 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 69 [2024-11-14 04:44:02,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:44:02,513 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2024-11-14 04:44:02,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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 04:44:02,513 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2024-11-14 04:44:02,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-14 04:44:02,513 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:44:02,513 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 5, 5, 4, 1, 1] [2024-11-14 04:44:02,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-14 04:44:02,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-14 04:44:02,714 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:44:02,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:44:02,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1024816405, now seen corresponding path program 6 times [2024-11-14 04:44:02,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:44:02,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427915400] [2024-11-14 04:44:02,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:44:02,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:44:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:44:04,331 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 304 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-14 04:44:04,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:44:04,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427915400] [2024-11-14 04:44:04,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427915400] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:44:04,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908062577] [2024-11-14 04:44:04,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:44:04,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:44:04,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:44:04,334 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:44:04,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 04:44:04,943 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:44:04,943 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:44:04,949 INFO L255 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-14 04:44:04,953 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:44:04,964 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 04:44:04,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 04:44:05,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:44:05,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-14 04:44:05,019 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 04:44:05,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-14 04:44:05,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:44:05,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-14 04:44:05,111 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 04:44:05,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-14 04:44:05,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:44:05,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-14 04:44:05,246 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 04:44:05,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-14 04:44:05,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:44:05,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-14 04:44:05,458 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 04:44:05,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-14 04:44:05,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:44:05,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-14 04:44:05,680 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 04:44:05,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-14 04:44:05,842 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 295 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-14 04:44:05,842 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:44:06,073 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:44:06,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-14 04:44:06,312 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:44:06,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-14 04:44:06,525 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:44:06,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-14 04:44:06,756 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:44:06,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-14 04:44:06,932 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 295 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-14 04:44:06,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908062577] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:44:06,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [382032582] [2024-11-14 04:44:06,933 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:44:06,933 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:44:06,933 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:44:06,934 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:44:06,934 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:44:08,445 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:44:13,362 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6919#(and (<= |ULTIMATE.start_main_#t~ret5#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_#t~ret5#1| 2147483648)) (exists ((|v_ULTIMATE.start_foo_~i~1#1_755| Int) (|v_ULTIMATE.start_foo_~b#1.offset_415| Int) (|v_ULTIMATE.start_bar_~i~0#1_559| Int) (|v_ULTIMATE.start_bar_~b#1.offset_466| Int) (|v_ULTIMATE.start_main_~#b~0#1.base_35| Int) (|v_ULTIMATE.start_bar_~b#1.base_462| Int) (|v_ULTIMATE.start_foo_~#a~0#1.base_451| Int) (|v_ULTIMATE.start_main_~i~2#1_275| Int) (|v_ULTIMATE.start_foo_~b#1.base_352| Int) (|v_ULTIMATE.start_main_~#b~0#1.offset_29| Int) (|v_#valid_706| (Array Int Int)) (|v_ULTIMATE.start_bar_~size#1_435| Int) (|v_ULTIMATE.start_bar_~res~0#1_548| Int) (|v_ULTIMATE.start_foo_~size#1_442| Int)) (and (<= |v_ULTIMATE.start_bar_~res~0#1_548| 2147483647) (or (and (= |v_ULTIMATE.start_bar_~res~0#1_548| 0) (= |v_ULTIMATE.start_bar_~i~0#1_559| 0)) (and (<= 1 |v_ULTIMATE.start_foo_~size#1_442|) (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_bar_~b#1.base_462|) (= |v_ULTIMATE.start_bar_~b#1.offset_466| 0) (<= 2 |v_ULTIMATE.start_foo_~#a~0#1.base_451|) (<= 1 |v_ULTIMATE.start_foo_~i~1#1_755|) (<= 2 |v_ULTIMATE.start_foo_~b#1.base_352|) (<= 2 |v_ULTIMATE.start_main_~#b~0#1.base_35|) (= |v_ULTIMATE.start_main_~#b~0#1.offset_29| 0) (= |v_ULTIMATE.start_foo_~b#1.offset_415| 0))) (or (< (+ |v_ULTIMATE.start_main_~#b~0#1.offset_29| (* |v_ULTIMATE.start_main_~i~2#1_275| 4)) 0) (< (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_35|) (+ |v_ULTIMATE.start_main_~#b~0#1.offset_29| (* |v_ULTIMATE.start_main_~i~2#1_275| 4) 4))) (or (and (= (store |v_#valid_706| |v_ULTIMATE.start_foo_~#a~0#1.base_451| 0) |#valid|) (not (= |v_ULTIMATE.start_bar_~res~0#1_548| 0)) (= |ULTIMATE.start_main_#t~ret5#1| |v_ULTIMATE.start_foo_~size#1_442|)) (and (= (store |v_#valid_706| |v_ULTIMATE.start_foo_~#a~0#1.base_451| 0) |#valid|) (= |v_ULTIMATE.start_foo_~i~1#1_755| |ULTIMATE.start_main_#t~ret5#1|) (= |v_ULTIMATE.start_bar_~res~0#1_548| 0))) (<= |v_ULTIMATE.start_bar_~size#1_435| |v_ULTIMATE.start_bar_~i~0#1_559|) (or (and (= |v_ULTIMATE.start_foo_~size#1_442| |v_ULTIMATE.start_bar_~size#1_435|) (= |v_ULTIMATE.start_bar_~b#1.base_462| |v_ULTIMATE.start_foo_~#a~0#1.base_451|) (<= |v_ULTIMATE.start_foo_~size#1_442| |v_ULTIMATE.start_foo_~i~1#1_755|) (= |v_ULTIMATE.start_bar_~i~0#1_559| 0)) (and (= (select |v_#valid_706| |v_ULTIMATE.start_bar_~b#1.base_462|) 1) (<= (* |v_ULTIMATE.start_bar_~i~0#1_559| 4) (select |#length| |v_ULTIMATE.start_bar_~b#1.base_462|)) (<= 1 |v_ULTIMATE.start_bar_~size#1_435|))) (<= 0 (+ |v_ULTIMATE.start_bar_~res~0#1_548| 2147483648)))))' at error location [2024-11-14 04:44:13,363 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:44:13,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:44:13,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 10] total 36 [2024-11-14 04:44:13,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644050277] [2024-11-14 04:44:13,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:44:13,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-14 04:44:13,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:44:13,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-14 04:44:13,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1624, Unknown=2, NotChecked=0, Total=1892 [2024-11-14 04:44:13,365 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand has 38 states, 37 states have (on average 3.4324324324324325) internal successors, (127), 37 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:44:15,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:44:15,478 INFO L93 Difference]: Finished difference Result 223 states and 245 transitions. [2024-11-14 04:44:15,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-14 04:44:15,479 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.4324324324324325) internal successors, (127), 37 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2024-11-14 04:44:15,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:44:15,480 INFO L225 Difference]: With dead ends: 223 [2024-11-14 04:44:15,481 INFO L226 Difference]: Without dead ends: 223 [2024-11-14 04:44:15,482 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=553, Invalid=2525, Unknown=2, NotChecked=0, Total=3080 [2024-11-14 04:44:15,482 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 183 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:44:15,483 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 141 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 04:44:15,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-14 04:44:15,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2024-11-14 04:44:15,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 219 states have (on average 1.1095890410958904) internal successors, (243), 220 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:44:15,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 243 transitions. [2024-11-14 04:44:15,490 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 243 transitions. Word has length 71 [2024-11-14 04:44:15,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:44:15,490 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 243 transitions. [2024-11-14 04:44:15,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.4324324324324325) internal successors, (127), 37 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:44:15,490 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 243 transitions. [2024-11-14 04:44:15,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-14 04:44:15,492 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:44:15,492 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2024-11-14 04:44:15,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-14 04:44:15,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-14 04:44:15,696 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:44:15,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:44:15,696 INFO L85 PathProgramCache]: Analyzing trace with hash -2070267258, now seen corresponding path program 1 times [2024-11-14 04:44:15,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:44:15,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848168124] [2024-11-14 04:44:15,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:44:15,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:44:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:44:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 0 proven. 581 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-11-14 04:44:16,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:44:16,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848168124] [2024-11-14 04:44:16,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848168124] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:44:16,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954847155] [2024-11-14 04:44:16,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:44:16,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:44:16,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:44:16,034 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:44:16,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-14 04:44:16,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:44:16,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 04:44:16,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:44:16,679 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 426 proven. 177 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2024-11-14 04:44:16,680 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:44:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 426 proven. 177 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2024-11-14 04:44:17,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954847155] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:44:17,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [300572112] [2024-11-14 04:44:17,002 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:44:17,002 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:44:17,002 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:44:17,003 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:44:17,003 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:44:18,192 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:44:20,696 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8012#(and (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_36| Int) (|v_#valid_745| (Array Int Int)) (|v_ULTIMATE.start_main_~#b~0#1.offset_31| Int)) (and (= (store |v_#valid_745| |v_ULTIMATE.start_main_~#b~0#1.base_36| 0) |#valid|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_36|) |v_ULTIMATE.start_main_~#b~0#1.offset_31|) 0)) (= (select |v_#valid_745| |v_ULTIMATE.start_main_~#b~0#1.base_36|) 1) (<= (+ |v_ULTIMATE.start_main_~#b~0#1.offset_31| 4) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_36|)) (<= 0 |v_ULTIMATE.start_main_~#b~0#1.offset_31|))) (exists ((|v_ULTIMATE.start_main_old_#valid#1_10| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_10| |#valid|))) (= |ULTIMATE.start_main_#res#1| 1))' at error location [2024-11-14 04:44:20,697 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:44:20,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:44:20,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 24 [2024-11-14 04:44:20,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620060721] [2024-11-14 04:44:20,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:44:20,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-14 04:44:20,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:44:20,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-14 04:44:20,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1087, Unknown=1, NotChecked=0, Total=1260 [2024-11-14 04:44:20,699 INFO L87 Difference]: Start difference. First operand 221 states and 243 transitions. Second operand has 25 states, 25 states have (on average 5.16) internal successors, (129), 24 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:44:22,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:44:22,186 INFO L93 Difference]: Finished difference Result 251 states and 272 transitions. [2024-11-14 04:44:22,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-14 04:44:22,187 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.16) internal successors, (129), 24 states have internal predecessors, (129), 0 states have call successors, (0), 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 100 [2024-11-14 04:44:22,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:44:22,188 INFO L225 Difference]: With dead ends: 251 [2024-11-14 04:44:22,188 INFO L226 Difference]: Without dead ends: 251 [2024-11-14 04:44:22,190 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 266 SyntacticMatches, 7 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=753, Invalid=4076, Unknown=1, NotChecked=0, Total=4830 [2024-11-14 04:44:22,190 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 124 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:44:22,191 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 34 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:44:22,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-11-14 04:44:22,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 239. [2024-11-14 04:44:22,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 237 states have (on average 1.0970464135021096) internal successors, (260), 238 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:44:22,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 260 transitions. [2024-11-14 04:44:22,198 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 260 transitions. Word has length 100 [2024-11-14 04:44:22,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:44:22,199 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 260 transitions. [2024-11-14 04:44:22,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.16) internal successors, (129), 24 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:44:22,199 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 260 transitions. [2024-11-14 04:44:22,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-14 04:44:22,200 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:44:22,200 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 20, 18, 18, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2024-11-14 04:44:22,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-14 04:44:22,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-14 04:44:22,401 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:44:22,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:44:22,401 INFO L85 PathProgramCache]: Analyzing trace with hash -766151290, now seen corresponding path program 2 times [2024-11-14 04:44:22,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:44:22,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829976458] [2024-11-14 04:44:22,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:44:22,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:44:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:44:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1233 backedges. 969 proven. 106 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2024-11-14 04:44:23,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:44:23,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829976458] [2024-11-14 04:44:23,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829976458] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:44:23,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805548768] [2024-11-14 04:44:23,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:44:23,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:44:23,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:44:23,213 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:44:23,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-14 04:44:23,631 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 04:44:23,631 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:44:23,639 INFO L255 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 04:44:23,643 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:44:23,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1233 backedges. 445 proven. 16 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2024-11-14 04:44:23,922 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:44:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1233 backedges. 445 proven. 16 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2024-11-14 04:44:24,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805548768] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:44:24,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [91898247] [2024-11-14 04:44:24,306 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:44:24,306 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:44:24,306 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:44:24,306 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:44:24,306 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:44:25,691 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:44:28,297 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9386#(and (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_37| Int) (|v_ULTIMATE.start_main_~#b~0#1.offset_33| Int) (|v_#valid_775| (Array Int Int))) (and (= (select |v_#valid_775| |v_ULTIMATE.start_main_~#b~0#1.base_37|) 1) (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_37|) |v_ULTIMATE.start_main_~#b~0#1.offset_33|) 0)) (<= 0 |v_ULTIMATE.start_main_~#b~0#1.offset_33|) (<= (+ |v_ULTIMATE.start_main_~#b~0#1.offset_33| 4) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_37|)) (= (store |v_#valid_775| |v_ULTIMATE.start_main_~#b~0#1.base_37| 0) |#valid|))) (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| 1))' at error location [2024-11-14 04:44:28,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:44:28,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:44:28,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 30 [2024-11-14 04:44:28,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318366353] [2024-11-14 04:44:28,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:44:28,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-14 04:44:28,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:44:28,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-14 04:44:28,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1381, Unknown=1, NotChecked=0, Total=1640 [2024-11-14 04:44:28,299 INFO L87 Difference]: Start difference. First operand 239 states and 260 transitions. Second operand has 30 states, 30 states have (on average 3.7) internal successors, (111), 30 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:44:32,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:44:32,446 INFO L93 Difference]: Finished difference Result 516 states and 595 transitions. [2024-11-14 04:44:32,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2024-11-14 04:44:32,447 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.7) internal successors, (111), 30 states have internal predecessors, (111), 0 states have call successors, (0), 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 130 [2024-11-14 04:44:32,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:44:32,449 INFO L225 Difference]: With dead ends: 516 [2024-11-14 04:44:32,449 INFO L226 Difference]: Without dead ends: 516 [2024-11-14 04:44:32,454 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4416 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=2976, Invalid=12523, Unknown=1, NotChecked=0, Total=15500 [2024-11-14 04:44:32,454 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 320 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:44:32,455 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 54 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 04:44:32,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2024-11-14 04:44:32,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 370. [2024-11-14 04:44:32,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 368 states have (on average 1.1467391304347827) internal successors, (422), 369 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:44:32,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 422 transitions. [2024-11-14 04:44:32,467 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 422 transitions. Word has length 130 [2024-11-14 04:44:32,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:44:32,468 INFO L471 AbstractCegarLoop]: Abstraction has 370 states and 422 transitions. [2024-11-14 04:44:32,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.7) internal successors, (111), 30 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:44:32,468 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 422 transitions. [2024-11-14 04:44:32,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2024-11-14 04:44:32,470 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:44:32,470 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 20, 20, 20, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2024-11-14 04:44:32,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-14 04:44:32,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-14 04:44:32,671 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:44:32,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:44:32,672 INFO L85 PathProgramCache]: Analyzing trace with hash -194632022, now seen corresponding path program 3 times [2024-11-14 04:44:32,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:44:32,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337418834] [2024-11-14 04:44:32,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:44:32,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:44:32,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:44:33,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 846 proven. 298 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2024-11-14 04:44:33,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:44:33,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337418834] [2024-11-14 04:44:33,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337418834] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:44:33,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206197706] [2024-11-14 04:44:33,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:44:33,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:44:33,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:44:33,331 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:44:33,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-14 04:46:51,701 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:46:51,701 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:46:51,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 04:46:51,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:46:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 1025 proven. 22 refuted. 0 times theorem prover too weak. 586 trivial. 0 not checked. [2024-11-14 04:46:51,980 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:46:52,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 1025 proven. 22 refuted. 0 times theorem prover too weak. 586 trivial. 0 not checked. [2024-11-14 04:46:52,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206197706] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:46:52,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [588841974] [2024-11-14 04:46:52,152 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:46:52,152 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:46:52,152 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:46:52,153 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:46:52,153 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:46:53,363 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:46:55,938 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11346#(and (exists ((|v_ULTIMATE.start_main_old_#valid#1_12| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_12| |#valid|))) (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_38| Int) (|v_ULTIMATE.start_main_~#b~0#1.offset_35| Int) (|v_#valid_809| (Array Int Int))) (and (<= 0 |v_ULTIMATE.start_main_~#b~0#1.offset_35|) (= (select |v_#valid_809| |v_ULTIMATE.start_main_~#b~0#1.base_38|) 1) (<= (+ |v_ULTIMATE.start_main_~#b~0#1.offset_35| 4) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_38|)) (= (store |v_#valid_809| |v_ULTIMATE.start_main_~#b~0#1.base_38| 0) |#valid|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_38|) |v_ULTIMATE.start_main_~#b~0#1.offset_35|) 0)))) (= |ULTIMATE.start_main_#res#1| 1))' at error location [2024-11-14 04:46:55,939 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:46:55,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:46:55,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-11-14 04:46:55,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120179449] [2024-11-14 04:46:55,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:46:55,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-14 04:46:55,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:46:55,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-14 04:46:55,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2024-11-14 04:46:55,941 INFO L87 Difference]: Start difference. First operand 370 states and 422 transitions. Second operand has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:46:57,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:46:57,499 INFO L93 Difference]: Finished difference Result 322 states and 362 transitions. [2024-11-14 04:46:57,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-14 04:46:57,500 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2024-11-14 04:46:57,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:46:57,502 INFO L225 Difference]: With dead ends: 322 [2024-11-14 04:46:57,502 INFO L226 Difference]: Without dead ends: 322 [2024-11-14 04:46:57,504 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 407 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=806, Invalid=4024, Unknown=0, NotChecked=0, Total=4830 [2024-11-14 04:46:57,506 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 89 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:46:57,506 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 19 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:46:57,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2024-11-14 04:46:57,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 308. [2024-11-14 04:46:57,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 306 states have (on average 1.1372549019607843) internal successors, (348), 307 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:46:57,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 348 transitions. [2024-11-14 04:46:57,520 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 348 transitions. Word has length 146 [2024-11-14 04:46:57,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:46:57,521 INFO L471 AbstractCegarLoop]: Abstraction has 308 states and 348 transitions. [2024-11-14 04:46:57,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:46:57,521 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 348 transitions. [2024-11-14 04:46:57,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2024-11-14 04:46:57,524 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:46:57,524 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 25, 25, 25, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2024-11-14 04:46:57,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-14 04:46:57,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:46:57,724 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:46:57,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:46:57,725 INFO L85 PathProgramCache]: Analyzing trace with hash -319291710, now seen corresponding path program 4 times [2024-11-14 04:46:57,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:46:57,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735764803] [2024-11-14 04:46:57,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:46:57,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:46:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:46:58,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2330 backedges. 1290 proven. 144 refuted. 0 times theorem prover too weak. 896 trivial. 0 not checked. [2024-11-14 04:46:58,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:46:58,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735764803] [2024-11-14 04:46:58,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735764803] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:46:58,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082590144] [2024-11-14 04:46:58,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:46:58,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:46:58,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:46:58,773 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:46:58,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-14 04:46:59,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:46:59,373 INFO L255 TraceCheckSpWp]: Trace formula consists of 1212 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 04:46:59,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:46:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2330 backedges. 1611 proven. 311 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2024-11-14 04:46:59,929 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:47:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2330 backedges. 1611 proven. 311 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2024-11-14 04:47:00,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082590144] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:47:00,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [984466363] [2024-11-14 04:47:00,276 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:47:00,276 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:47:00,276 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:47:00,276 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:47:00,276 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:47:01,371 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:47:03,879 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13117#(and (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_39| Int) (|v_ULTIMATE.start_main_~#b~0#1.offset_37| Int) (|v_#valid_853| (Array Int Int))) (and (<= 0 |v_ULTIMATE.start_main_~#b~0#1.offset_37|) (= (select |v_#valid_853| |v_ULTIMATE.start_main_~#b~0#1.base_39|) 1) (= (store |v_#valid_853| |v_ULTIMATE.start_main_~#b~0#1.base_39| 0) |#valid|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_39|) |v_ULTIMATE.start_main_~#b~0#1.offset_37|) 0)) (<= (+ |v_ULTIMATE.start_main_~#b~0#1.offset_37| 4) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_39|)))) (= |ULTIMATE.start_main_#res#1| 1) (exists ((|v_ULTIMATE.start_main_old_#valid#1_13| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_13| |#valid|))))' at error location [2024-11-14 04:47:03,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:47:03,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:47:03,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 27 [2024-11-14 04:47:03,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469679654] [2024-11-14 04:47:03,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:47:03,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-14 04:47:03,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:47:03,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-14 04:47:03,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1154, Unknown=0, NotChecked=0, Total=1332 [2024-11-14 04:47:03,882 INFO L87 Difference]: Start difference. First operand 308 states and 348 transitions. Second operand has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:47:05,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:47:05,696 INFO L93 Difference]: Finished difference Result 442 states and 488 transitions. [2024-11-14 04:47:05,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-14 04:47:05,697 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2024-11-14 04:47:05,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:47:05,699 INFO L225 Difference]: With dead ends: 442 [2024-11-14 04:47:05,699 INFO L226 Difference]: Without dead ends: 442 [2024-11-14 04:47:05,701 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 484 SyntacticMatches, 13 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=668, Invalid=3622, Unknown=0, NotChecked=0, Total=4290 [2024-11-14 04:47:05,702 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 50 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:47:05,702 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 44 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 04:47:05,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2024-11-14 04:47:05,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 374. [2024-11-14 04:47:05,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 372 states have (on average 1.1209677419354838) internal successors, (417), 373 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:47:05,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 417 transitions. [2024-11-14 04:47:05,714 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 417 transitions. Word has length 173 [2024-11-14 04:47:05,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:47:05,714 INFO L471 AbstractCegarLoop]: Abstraction has 374 states and 417 transitions. [2024-11-14 04:47:05,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:47:05,715 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 417 transitions. [2024-11-14 04:47:05,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2024-11-14 04:47:05,717 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:47:05,717 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 27, 27, 27, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2024-11-14 04:47:05,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-14 04:47:05,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:47:05,918 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:47:05,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:47:05,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1906403918, now seen corresponding path program 5 times [2024-11-14 04:47:05,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:47:05,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937907850] [2024-11-14 04:47:05,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:47:05,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:47:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:47:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2499 backedges. 1975 proven. 190 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2024-11-14 04:47:07,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:47:07,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937907850] [2024-11-14 04:47:07,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937907850] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:47:07,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300628893] [2024-11-14 04:47:07,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:47:07,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:47:07,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:47:07,042 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:47:07,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-14 04:47:07,744 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-14 04:47:07,744 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:47:07,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 04:47:07,753 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:47:08,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2499 backedges. 960 proven. 51 refuted. 0 times theorem prover too weak. 1488 trivial. 0 not checked. [2024-11-14 04:47:08,046 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:47:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2499 backedges. 960 proven. 51 refuted. 0 times theorem prover too weak. 1488 trivial. 0 not checked. [2024-11-14 04:47:08,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300628893] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:47:08,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [115942549] [2024-11-14 04:47:08,556 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:47:08,556 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:47:08,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:47:08,557 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:47:08,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:47:09,808 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:47:12,169 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15103#(and (exists ((|v_ULTIMATE.start_main_~#b~0#1.offset_39| Int) (|v_#valid_883| (Array Int Int)) (|v_ULTIMATE.start_main_~#b~0#1.base_40| Int)) (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_40|) |v_ULTIMATE.start_main_~#b~0#1.offset_39|) 0)) (= (store |v_#valid_883| |v_ULTIMATE.start_main_~#b~0#1.base_40| 0) |#valid|) (= (select |v_#valid_883| |v_ULTIMATE.start_main_~#b~0#1.base_40|) 1) (<= (+ |v_ULTIMATE.start_main_~#b~0#1.offset_39| 4) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_40|)) (<= 0 |v_ULTIMATE.start_main_~#b~0#1.offset_39|))) (exists ((|v_ULTIMATE.start_main_old_#valid#1_14| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_14| |#valid|))) (= |ULTIMATE.start_main_#res#1| 1))' at error location [2024-11-14 04:47:12,169 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:47:12,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:47:12,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 34 [2024-11-14 04:47:12,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249963233] [2024-11-14 04:47:12,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:47:12,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-14 04:47:12,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:47:12,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-14 04:47:12,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1599, Unknown=0, NotChecked=0, Total=1892 [2024-11-14 04:47:12,171 INFO L87 Difference]: Start difference. First operand 374 states and 417 transitions. Second operand has 34 states, 34 states have (on average 4.117647058823529) internal successors, (140), 34 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:47:20,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:47:20,291 INFO L93 Difference]: Finished difference Result 1312 states and 1505 transitions. [2024-11-14 04:47:20,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2024-11-14 04:47:20,292 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.117647058823529) internal successors, (140), 34 states have internal predecessors, (140), 0 states have call successors, (0), 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 179 [2024-11-14 04:47:20,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:47:20,297 INFO L225 Difference]: With dead ends: 1312 [2024-11-14 04:47:20,297 INFO L226 Difference]: Without dead ends: 1312 [2024-11-14 04:47:20,306 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 508 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13533 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=6688, Invalid=32714, Unknown=0, NotChecked=0, Total=39402 [2024-11-14 04:47:20,306 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 286 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:47:20,307 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 28 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 04:47:20,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2024-11-14 04:47:20,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 905. [2024-11-14 04:47:20,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 903 states have (on average 1.1229235880398671) internal successors, (1014), 904 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:47:20,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1014 transitions. [2024-11-14 04:47:20,341 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1014 transitions. Word has length 179 [2024-11-14 04:47:20,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:47:20,344 INFO L471 AbstractCegarLoop]: Abstraction has 905 states and 1014 transitions. [2024-11-14 04:47:20,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.117647058823529) internal successors, (140), 34 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:47:20,344 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1014 transitions. [2024-11-14 04:47:20,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2024-11-14 04:47:20,347 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:47:20,347 INFO L215 NwaCegarLoop]: trace histogram [38, 38, 38, 31, 31, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2024-11-14 04:47:20,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-14 04:47:20,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:47:20,548 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-14 04:47:20,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:47:20,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1743225840, now seen corresponding path program 6 times [2024-11-14 04:47:20,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:47:20,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880232778] [2024-11-14 04:47:20,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:47:20,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:47:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:47:21,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3711 backedges. 0 proven. 3053 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2024-11-14 04:47:21,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:47:21,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880232778] [2024-11-14 04:47:21,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880232778] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:47:21,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263084140] [2024-11-14 04:47:21,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:47:21,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:47:21,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:47:21,127 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:47:21,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7763a034-4713-4091-9f8b-d075235f1141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process