./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i --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_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/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_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/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_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/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 d450427152972d80716d02c80706dd3b248a3fc7c05c71ffd29d66e32e1e82f2 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:29:50,093 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:29:50,201 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-14 04:29:50,209 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:29:50,210 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:29:50,256 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:29:50,259 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:29:50,260 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:29:50,260 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:29:50,260 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:29:50,261 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:29:50,261 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:29:50,261 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:29:50,261 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:29:50,261 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:29:50,261 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:29:50,261 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:29:50,261 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:29:50,261 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:29:50,262 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:29:50,262 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:29:50,262 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:29:50,265 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-14 04:29:50,265 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-14 04:29:50,266 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:29:50,266 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:29:50,267 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:29:50,267 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:29:50,267 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:29:50,267 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-14 04:29:50,267 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-14 04:29:50,267 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-14 04:29:50,267 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:29:50,268 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 04:29:50,268 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:29:50,269 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 04:29:50,269 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:29:50,269 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:29:50,269 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:29:50,269 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:29:50,270 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:29:50,270 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:29:50,270 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:29:50,270 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:29:50,270 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:29:50,270 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:29:50,270 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:29:50,270 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:29:50,270 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:29:50,271 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_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/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 -> d450427152972d80716d02c80706dd3b248a3fc7c05c71ffd29d66e32e1e82f2 [2024-11-14 04:29:50,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:29:50,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:29:50,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:29:50,670 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:29:50,671 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:29:50,673 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i Unable to find full path for "g++" [2024-11-14 04:29:52,699 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:29:53,092 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:29:53,093 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2024-11-14 04:29:53,109 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/data/fcb18ed57/dfb4f1f97a2f48b099f91ba42f6f9dbc/FLAG0ee0297ed [2024-11-14 04:29:53,125 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/data/fcb18ed57/dfb4f1f97a2f48b099f91ba42f6f9dbc [2024-11-14 04:29:53,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:29:53,129 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:29:53,130 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:29:53,130 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:29:53,135 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:29:53,136 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:29:53" (1/1) ... [2024-11-14 04:29:53,137 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62287b55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:29:53, skipping insertion in model container [2024-11-14 04:29:53,137 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:29:53" (1/1) ... [2024-11-14 04:29:53,175 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:29:53,527 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-14 04:29:53,528 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-14 04:29:53,534 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:29:53,547 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:29:53,599 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:29:53,630 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:29:53,631 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:29:53 WrapperNode [2024-11-14 04:29:53,631 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:29:53,632 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:29:53,633 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:29:53,633 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:29:53,639 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:29:53" (1/1) ... [2024-11-14 04:29:53,650 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:29:53" (1/1) ... [2024-11-14 04:29:53,670 INFO L138 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 91 [2024-11-14 04:29:53,671 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:29:53,671 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:29:53,671 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:29:53,672 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:29:53,680 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:29:53" (1/1) ... [2024-11-14 04:29:53,680 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:29:53" (1/1) ... [2024-11-14 04:29:53,683 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:29:53" (1/1) ... [2024-11-14 04:29:53,684 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:29:53" (1/1) ... [2024-11-14 04:29:53,691 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:29:53" (1/1) ... [2024-11-14 04:29:53,695 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:29:53" (1/1) ... [2024-11-14 04:29:53,697 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:29:53" (1/1) ... [2024-11-14 04:29:53,698 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:29:53" (1/1) ... [2024-11-14 04:29:53,700 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:29:53,701 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:29:53,701 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:29:53,701 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:29:53,703 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:29:53" (1/1) ... [2024-11-14 04:29:53,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:29:53,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:29:53,750 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:29:53,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:29:53,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 04:29:53,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 04:29:53,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 04:29:53,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 04:29:53,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:29:53,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:29:53,928 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:29:53,934 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:29:54,272 INFO L? ?]: Removed 59 outVars from TransFormulas that were not future-live. [2024-11-14 04:29:54,272 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:29:54,400 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:29:54,404 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-14 04:29:54,405 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:29:54 BoogieIcfgContainer [2024-11-14 04:29:54,405 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:29:54,408 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:29:54,411 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:29:54,418 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:29:54,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:29:53" (1/3) ... [2024-11-14 04:29:54,420 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@535f89f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:29:54, skipping insertion in model container [2024-11-14 04:29:54,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:29:53" (2/3) ... [2024-11-14 04:29:54,421 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@535f89f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:29:54, skipping insertion in model container [2024-11-14 04:29:54,422 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:29:54" (3/3) ... [2024-11-14 04:29:54,424 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrpbrk-alloca-2.i [2024-11-14 04:29:54,442 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:29:54,444 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG openbsd_cstrpbrk-alloca-2.i that has 1 procedures, 31 locations, 1 initial locations, 4 loop locations, and 13 error locations. [2024-11-14 04:29:54,491 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:29:54,507 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;@54fb2461, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:29:54,507 INFO L334 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-11-14 04:29:54,512 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 2.176470588235294) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:29:54,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 04:29:54,519 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:29:54,520 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 04:29:54,521 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:29:54,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:29:54,529 INFO L85 PathProgramCache]: Analyzing trace with hash 138161, now seen corresponding path program 1 times [2024-11-14 04:29:54,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:29:54,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341940726] [2024-11-14 04:29:54,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:29:54,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:29:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:29:54,947 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 04:29:54,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:29:54,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341940726] [2024-11-14 04:29:54,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341940726] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:29:54,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:29:54,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 04:29:54,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587903675] [2024-11-14 04:29:54,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:29:54,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:29:54,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:29:54,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:29:54,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:29:54,999 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 2.176470588235294) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:29:55,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:29:55,097 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2024-11-14 04:29:55,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:29:55,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-14 04:29:55,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:29:55,110 INFO L225 Difference]: With dead ends: 29 [2024-11-14 04:29:55,110 INFO L226 Difference]: Without dead ends: 28 [2024-11-14 04:29:55,114 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:29:55,119 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 10 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:29:55,121 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 30 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:29:55,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-14 04:29:55,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-14 04:29:55,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 27 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 04:29:55,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2024-11-14 04:29:55,167 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 3 [2024-11-14 04:29:55,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:29:55,170 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2024-11-14 04:29:55,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:29:55,170 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2024-11-14 04:29:55,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 04:29:55,171 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:29:55,171 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 04:29:55,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:29:55,171 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:29:55,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:29:55,172 INFO L85 PathProgramCache]: Analyzing trace with hash 138162, now seen corresponding path program 1 times [2024-11-14 04:29:55,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:29:55,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746855530] [2024-11-14 04:29:55,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:29:55,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:29:55,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:29:55,689 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 04:29:55,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:29:55,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746855530] [2024-11-14 04:29:55,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746855530] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:29:55,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:29:55,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:29:55,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807176641] [2024-11-14 04:29:55,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:29:55,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:29:55,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:29:55,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:29:55,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:29:55,694 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:29:55,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:29:55,801 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2024-11-14 04:29:55,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:29:55,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-14 04:29:55,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:29:55,802 INFO L225 Difference]: With dead ends: 28 [2024-11-14 04:29:55,802 INFO L226 Difference]: Without dead ends: 28 [2024-11-14 04:29:55,803 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:29:55,804 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 54 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 04:29:55,804 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 54 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:29:55,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-14 04:29:55,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2024-11-14 04:29:55,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.8235294117647058) 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 04:29:55,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-14 04:29:55,809 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 3 [2024-11-14 04:29:55,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:29:55,809 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-14 04:29:55,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:29:55,810 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-14 04:29:55,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 04:29:55,810 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:29:55,810 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 04:29:55,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 04:29:55,811 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:29:55,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:29:55,812 INFO L85 PathProgramCache]: Analyzing trace with hash 4368446, now seen corresponding path program 1 times [2024-11-14 04:29:55,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:29:55,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778628674] [2024-11-14 04:29:55,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:29:55,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:29:55,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:29:55,922 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 04:29:55,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:29:55,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778628674] [2024-11-14 04:29:55,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778628674] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:29:55,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:29:55,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:29:55,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159528880] [2024-11-14 04:29:55,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:29:55,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:29:55,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:29:55,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:29:55,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:29:55,924 INFO L87 Difference]: Start difference. First operand 27 states and 31 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 04:29:55,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:29:55,968 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2024-11-14 04:29:55,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:29:55,969 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 04:29:55,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:29:55,969 INFO L225 Difference]: With dead ends: 30 [2024-11-14 04:29:55,970 INFO L226 Difference]: Without dead ends: 30 [2024-11-14 04:29:55,970 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:29:55,971 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:29:55,971 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 40 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:29:55,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-14 04:29:55,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2024-11-14 04:29:55,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 27 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 04:29:55,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2024-11-14 04:29:55,976 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 4 [2024-11-14 04:29:55,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:29:55,977 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2024-11-14 04:29:55,977 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 04:29:55,977 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2024-11-14 04:29:55,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 04:29:55,977 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:29:55,978 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 04:29:55,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 04:29:55,978 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:29:55,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:29:55,979 INFO L85 PathProgramCache]: Analyzing trace with hash 4366112, now seen corresponding path program 1 times [2024-11-14 04:29:55,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:29:55,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245019507] [2024-11-14 04:29:55,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:29:55,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:29:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:29:56,068 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 04:29:56,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:29:56,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245019507] [2024-11-14 04:29:56,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245019507] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:29:56,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:29:56,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 04:29:56,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790512437] [2024-11-14 04:29:56,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:29:56,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:29:56,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:29:56,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:29:56,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:29:56,071 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 3 states, 2 states have (on average 2.0) 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 04:29:56,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:29:56,116 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2024-11-14 04:29:56,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:29:56,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) 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 04:29:56,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:29:56,118 INFO L225 Difference]: With dead ends: 26 [2024-11-14 04:29:56,118 INFO L226 Difference]: Without dead ends: 26 [2024-11-14 04:29:56,118 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:29:56,119 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:29:56,120 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 29 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:29:56,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-14 04:29:56,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-14 04:29:56,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.6666666666666667) 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 04:29:56,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-11-14 04:29:56,124 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 4 [2024-11-14 04:29:56,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:29:56,124 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-11-14 04:29:56,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) 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 04:29:56,125 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-11-14 04:29:56,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 04:29:56,125 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:29:56,125 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 04:29:56,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 04:29:56,125 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:29:56,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:29:56,126 INFO L85 PathProgramCache]: Analyzing trace with hash 4366113, now seen corresponding path program 1 times [2024-11-14 04:29:56,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:29:56,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445296906] [2024-11-14 04:29:56,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:29:56,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:29:56,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:29:56,188 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 04:29:56,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:29:56,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445296906] [2024-11-14 04:29:56,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445296906] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:29:56,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:29:56,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:29:56,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690742697] [2024-11-14 04:29:56,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:29:56,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:29:56,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:29:56,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:29:56,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:29:56,190 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:29:56,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:29:56,227 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2024-11-14 04:29:56,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:29:56,228 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 04:29:56,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:29:56,229 INFO L225 Difference]: With dead ends: 27 [2024-11-14 04:29:56,229 INFO L226 Difference]: Without dead ends: 27 [2024-11-14 04:29:56,229 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 04:29:56,230 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:29:56,230 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 38 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:29:56,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-14 04:29:56,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-14 04:29:56,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.631578947368421) 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 04:29:56,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-14 04:29:56,235 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 4 [2024-11-14 04:29:56,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:29:56,235 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-14 04:29:56,235 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 04:29:56,235 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-14 04:29:56,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 04:29:56,236 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:29:56,236 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-14 04:29:56,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 04:29:56,236 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:29:56,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:29:56,237 INFO L85 PathProgramCache]: Analyzing trace with hash -176672620, now seen corresponding path program 1 times [2024-11-14 04:29:56,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:29:56,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344644933] [2024-11-14 04:29:56,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:29:56,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:29:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:29:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:29:56,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:29:56,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344644933] [2024-11-14 04:29:56,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344644933] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:29:56,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:29:56,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:29:56,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031000470] [2024-11-14 04:29:56,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:29:56,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:29:56,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:29:56,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:29:56,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:29:56,608 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:29:56,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:29:56,745 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2024-11-14 04:29:56,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:29:56,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-14 04:29:56,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:29:56,746 INFO L225 Difference]: With dead ends: 28 [2024-11-14 04:29:56,747 INFO L226 Difference]: Without dead ends: 28 [2024-11-14 04:29:56,747 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:29:56,748 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:29:56,748 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 57 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:29:56,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-14 04:29:56,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-14 04:29:56,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.6) internal successors, (32), 27 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 04:29:56,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2024-11-14 04:29:56,751 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 6 [2024-11-14 04:29:56,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:29:56,752 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2024-11-14 04:29:56,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:29:56,752 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2024-11-14 04:29:56,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 04:29:56,752 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:29:56,753 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:29:56,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 04:29:56,753 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:29:56,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:29:56,754 INFO L85 PathProgramCache]: Analyzing trace with hash 2016362381, now seen corresponding path program 1 times [2024-11-14 04:29:56,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:29:56,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754417832] [2024-11-14 04:29:56,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:29:56,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:29:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:29:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:29:56,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:29:56,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754417832] [2024-11-14 04:29:56,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754417832] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:29:56,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32722142] [2024-11-14 04:29:56,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:29:56,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:29:56,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:29:56,950 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:29:56,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:29:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:29:57,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 04:29:57,059 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:29:57,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:29:57,297 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:29:57,467 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 04:29:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:29:57,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32722142] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:29:57,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [355916315] [2024-11-14 04:29:57,556 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 04:29:57,556 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:29:57,561 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:29:57,567 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:29:57,568 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:29:59,126 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:29:59,400 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '448#(= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0)' at error location [2024-11-14 04:29:59,400 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:29:59,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:29:59,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-14 04:29:59,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464073848] [2024-11-14 04:29:59,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:29:59,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 04:29:59,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:29:59,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 04:29:59,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-11-14 04:29:59,403 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:29:59,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:29:59,547 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2024-11-14 04:29:59,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:29:59,548 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-14 04:29:59,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:29:59,548 INFO L225 Difference]: With dead ends: 27 [2024-11-14 04:29:59,548 INFO L226 Difference]: Without dead ends: 27 [2024-11-14 04:29:59,549 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2024-11-14 04:29:59,550 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:29:59,550 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 98 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:29:59,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-14 04:29:59,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-14 04:29:59,553 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 04:29:59,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-14 04:29:59,554 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 8 [2024-11-14 04:29:59,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:29:59,554 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-14 04:29:59,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:29:59,555 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-14 04:29:59,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 04:29:59,555 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:29:59,555 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-14 04:29:59,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:29:59,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 04:29:59,761 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:29:59,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:29:59,769 INFO L85 PathProgramCache]: Analyzing trace with hash 2016360048, now seen corresponding path program 1 times [2024-11-14 04:29:59,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:29:59,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238807096] [2024-11-14 04:29:59,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:29:59,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:29:59,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:00,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:30:00,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:30:00,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238807096] [2024-11-14 04:30:00,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238807096] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:30:00,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927359875] [2024-11-14 04:30:00,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:00,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:30:00,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:30:00,150 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:30:00,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:30:00,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:00,247 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 04:30:00,249 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:30:00,307 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 7 [2024-11-14 04:30:00,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:30:00,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-14 04:30:00,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:30:00,564 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:30:00,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:30:00,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927359875] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:30:00,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1448225658] [2024-11-14 04:30:00,838 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:30:00,838 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:30:00,839 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:30:00,839 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:30:00,839 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:30:01,810 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:30:02,167 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '568#(and (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet12#1|)) (exists ((|v_ULTIMATE.start_main_~nondetString2~0#1.offset_27| Int) (|v_ULTIMATE.start_main_~nondetString2~0#1.base_29| Int) (|v_ULTIMATE.start_main_~i~1#1_43| Int)) (and (or (< (select |#length| |v_ULTIMATE.start_main_~nondetString2~0#1.base_29|) (+ |v_ULTIMATE.start_main_~i~1#1_43| |v_ULTIMATE.start_main_~nondetString2~0#1.offset_27| 1)) (< (+ |v_ULTIMATE.start_main_~i~1#1_43| |v_ULTIMATE.start_main_~nondetString2~0#1.offset_27|) 0)) (<= 0 |v_ULTIMATE.start_main_~i~1#1_43|) (<= (+ |v_ULTIMATE.start_main_~i~1#1_43| 1) |ULTIMATE.start_main_~length2~0#1|))) (<= |ULTIMATE.start_main_#t~nondet12#1| 127))' at error location [2024-11-14 04:30:02,168 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:30:02,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:30:02,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-14 04:30:02,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115140029] [2024-11-14 04:30:02,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:30:02,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 04:30:02,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:30:02,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 04:30:02,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2024-11-14 04:30:02,170 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:02,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:30:02,369 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2024-11-14 04:30:02,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:30:02,370 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-14 04:30:02,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:30:02,371 INFO L225 Difference]: With dead ends: 25 [2024-11-14 04:30:02,371 INFO L226 Difference]: Without dead ends: 25 [2024-11-14 04:30:02,372 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2024-11-14 04:30:02,374 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:30:02,374 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 112 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:30:02,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-14 04:30:02,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-11-14 04:30:02,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.4736842105263157) 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 04:30:02,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-11-14 04:30:02,379 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 8 [2024-11-14 04:30:02,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:30:02,379 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-11-14 04:30:02,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:02,379 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-11-14 04:30:02,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 04:30:02,380 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:30:02,380 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:30:02,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 04:30:02,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-14 04:30:02,587 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:30:02,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:30:02,587 INFO L85 PathProgramCache]: Analyzing trace with hash 39133696, now seen corresponding path program 1 times [2024-11-14 04:30:02,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:30:02,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875605091] [2024-11-14 04:30:02,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:02,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:30:02,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:02,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:30:02,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:30:02,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875605091] [2024-11-14 04:30:02,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875605091] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:30:02,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:30:02,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:30:02,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466708407] [2024-11-14 04:30:02,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:30:02,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:30:02,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:30:02,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:30:02,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:30:02,688 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:02,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:30:02,760 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2024-11-14 04:30:02,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:30:02,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-14 04:30:02,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:30:02,762 INFO L225 Difference]: With dead ends: 24 [2024-11-14 04:30:02,762 INFO L226 Difference]: Without dead ends: 24 [2024-11-14 04:30:02,762 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:30:02,763 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:30:02,763 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 29 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:30:02,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-14 04:30:02,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2024-11-14 04:30:02,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 22 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 04:30:02,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2024-11-14 04:30:02,767 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 11 [2024-11-14 04:30:02,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:30:02,767 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2024-11-14 04:30:02,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:02,767 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2024-11-14 04:30:02,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 04:30:02,768 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:30:02,768 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:30:02,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 04:30:02,768 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:30:02,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:30:02,769 INFO L85 PathProgramCache]: Analyzing trace with hash 39133697, now seen corresponding path program 1 times [2024-11-14 04:30:02,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:30:02,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7870054] [2024-11-14 04:30:02,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:02,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:30:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:02,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:30:02,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:30:02,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7870054] [2024-11-14 04:30:02,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7870054] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:30:02,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127793629] [2024-11-14 04:30:02,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:02,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:30:02,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:30:02,949 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:30:02,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:30:03,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:03,033 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 04:30:03,035 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:30:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:30:03,144 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:30:03,193 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 20 treesize of output 16 [2024-11-14 04:30:03,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:30:03,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127793629] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:30:03,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [438767839] [2024-11-14 04:30:03,207 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-14 04:30:03,207 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:30:03,207 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:30:03,207 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:30:03,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:30:03,941 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:30:04,558 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '750#(and (= 1 (select |#valid| |ULTIMATE.start_cstrpbrk_~s1#1.base|)) (exists ((|v_#memory_int_53| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length2~0#1_46| Int) (|v_ULTIMATE.start_main_~length1~0#1_44| Int)) (and (<= 1 (+ |v_ULTIMATE.start_main_~length2~0#1_46| |ULTIMATE.start_cstrpbrk_~s2#1.offset|)) (<= (+ |v_ULTIMATE.start_main_~length2~0#1_46| |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (select |#length| |ULTIMATE.start_cstrpbrk_~s2#1.base|)) (<= (+ |v_ULTIMATE.start_main_~length1~0#1_44| |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (+ (select |#length| |ULTIMATE.start_cstrpbrk_~s1#1.base|) 1)) (<= 2 (+ |v_ULTIMATE.start_main_~length1~0#1_44| |ULTIMATE.start_cstrpbrk_~s1#1.offset|)) (= |#memory_int| (store (store |v_#memory_int_53| |ULTIMATE.start_cstrpbrk_~s1#1.base| (store (select |v_#memory_int_53| |ULTIMATE.start_cstrpbrk_~s1#1.base|) (+ (- 2) |v_ULTIMATE.start_main_~length1~0#1_44| |ULTIMATE.start_cstrpbrk_~s1#1.offset|) 0)) |ULTIMATE.start_cstrpbrk_~s2#1.base| (store (select (store |v_#memory_int_53| |ULTIMATE.start_cstrpbrk_~s1#1.base| (store (select |v_#memory_int_53| |ULTIMATE.start_cstrpbrk_~s1#1.base|) (+ (- 2) |v_ULTIMATE.start_main_~length1~0#1_44| |ULTIMATE.start_cstrpbrk_~s1#1.offset|) 0)) |ULTIMATE.start_cstrpbrk_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_main_~length2~0#1_46| |ULTIMATE.start_cstrpbrk_~s2#1.offset|) 0))))) (= (select |#valid| |ULTIMATE.start_cstrpbrk_~s2#1.base|) 1) (or (< |ULTIMATE.start_cstrpbrk_~s1#1.offset| 1) (< (select |#length| |ULTIMATE.start_cstrpbrk_~s1#1.base|) |ULTIMATE.start_cstrpbrk_~s1#1.offset|)))' at error location [2024-11-14 04:30:04,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:30:04,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:30:04,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-14 04:30:04,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119348577] [2024-11-14 04:30:04,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:30:04,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 04:30:04,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:30:04,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 04:30:04,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=260, Unknown=3, NotChecked=0, Total=306 [2024-11-14 04:30:04,563 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) 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 04:30:04,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:30:04,699 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2024-11-14 04:30:04,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:30:04,699 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) 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 11 [2024-11-14 04:30:04,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:30:04,703 INFO L225 Difference]: With dead ends: 25 [2024-11-14 04:30:04,703 INFO L226 Difference]: Without dead ends: 25 [2024-11-14 04:30:04,704 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=49, Invalid=290, Unknown=3, NotChecked=0, Total=342 [2024-11-14 04:30:04,705 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:30:04,705 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 72 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:30:04,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-14 04:30:04,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-14 04:30:04,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.380952380952381) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:04,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-11-14 04:30:04,712 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2024-11-14 04:30:04,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:30:04,716 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-11-14 04:30:04,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) 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 04:30:04,717 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-11-14 04:30:04,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 04:30:04,717 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:30:04,717 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:30:04,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 04:30:04,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 04:30:04,918 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:30:04,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:30:04,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1897177785, now seen corresponding path program 1 times [2024-11-14 04:30:04,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:30:04,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927110938] [2024-11-14 04:30:04,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:04,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:30:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:05,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:30:05,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:30:05,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927110938] [2024-11-14 04:30:05,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927110938] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:30:05,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:30:05,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 04:30:05,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578761968] [2024-11-14 04:30:05,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:30:05,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:30:05,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:30:05,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:30:05,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:30:05,045 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 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 04:30:05,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:30:05,148 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2024-11-14 04:30:05,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:30:05,149 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 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 14 [2024-11-14 04:30:05,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:30:05,150 INFO L225 Difference]: With dead ends: 27 [2024-11-14 04:30:05,150 INFO L226 Difference]: Without dead ends: 27 [2024-11-14 04:30:05,150 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:30:05,151 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:30:05,151 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 43 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:30:05,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-14 04:30:05,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2024-11-14 04:30:05,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.3333333333333333) 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 04:30:05,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-11-14 04:30:05,154 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2024-11-14 04:30:05,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:30:05,155 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-11-14 04:30:05,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 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 04:30:05,155 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-11-14 04:30:05,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 04:30:05,156 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:30:05,156 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:30:05,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-14 04:30:05,156 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:30:05,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:30:05,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1897177786, now seen corresponding path program 1 times [2024-11-14 04:30:05,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:30:05,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603797823] [2024-11-14 04:30:05,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:05,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:30:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:30:05,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:30:05,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603797823] [2024-11-14 04:30:05,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603797823] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:30:05,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764776632] [2024-11-14 04:30:05,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:05,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:30:05,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:30:05,508 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:30:05,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:30:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:05,610 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 04:30:05,612 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:30:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:30:05,789 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:30:05,851 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 20 treesize of output 16 [2024-11-14 04:30:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:30:05,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764776632] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:30:05,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1539016391] [2024-11-14 04:30:05,885 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:30:05,885 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:30:05,886 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:30:05,886 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:30:05,886 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:30:06,692 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:30:08,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1539016391] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:30:08,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:30:08,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6, 6, 6] total 23 [2024-11-14 04:30:08,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431614902] [2024-11-14 04:30:08,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:30:08,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 04:30:08,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:30:08,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 04:30:08,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=504, Unknown=2, NotChecked=0, Total=600 [2024-11-14 04:30:08,039 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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 04:30:08,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:30:08,416 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2024-11-14 04:30:08,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 04:30:08,417 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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 14 [2024-11-14 04:30:08,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:30:08,417 INFO L225 Difference]: With dead ends: 27 [2024-11-14 04:30:08,417 INFO L226 Difference]: Without dead ends: 27 [2024-11-14 04:30:08,418 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=94, Invalid=504, Unknown=2, NotChecked=0, Total=600 [2024-11-14 04:30:08,419 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:30:08,419 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 39 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 161 Invalid, 3 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:30:08,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-14 04:30:08,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-14 04:30:08,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 26 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 04:30:08,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2024-11-14 04:30:08,422 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 14 [2024-11-14 04:30:08,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:30:08,423 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2024-11-14 04:30:08,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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 04:30:08,423 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2024-11-14 04:30:08,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 04:30:08,424 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:30:08,424 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:30:08,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 04:30:08,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-14 04:30:08,628 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:30:08,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:30:08,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1317069463, now seen corresponding path program 1 times [2024-11-14 04:30:08,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:30:08,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460600277] [2024-11-14 04:30:08,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:08,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:30:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:08,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:30:08,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:30:08,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460600277] [2024-11-14 04:30:08,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460600277] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:30:08,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:30:08,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:30:08,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717916646] [2024-11-14 04:30:08,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:30:08,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:30:08,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:30:08,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:30:08,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:30:08,825 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:08,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:30:08,859 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2024-11-14 04:30:08,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:30:08,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-14 04:30:08,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:30:08,861 INFO L225 Difference]: With dead ends: 26 [2024-11-14 04:30:08,861 INFO L226 Difference]: Without dead ends: 23 [2024-11-14 04:30:08,862 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:30:08,863 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:30:08,864 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 26 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:30:08,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-14 04:30:08,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-14 04:30:08,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.2380952380952381) 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 04:30:08,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-11-14 04:30:08,869 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2024-11-14 04:30:08,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:30:08,870 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-11-14 04:30:08,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:08,870 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-11-14 04:30:08,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 04:30:08,872 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:30:08,873 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:30:08,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-14 04:30:08,873 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:30:08,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:30:08,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1349655836, now seen corresponding path program 1 times [2024-11-14 04:30:08,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:30:08,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526519737] [2024-11-14 04:30:08,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:08,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:30:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:09,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:30:09,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:30:09,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526519737] [2024-11-14 04:30:09,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526519737] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:30:09,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789163336] [2024-11-14 04:30:09,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:09,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:30:09,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:30:09,571 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:30:09,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:30:09,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:09,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-14 04:30:09,682 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:30:09,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 04:30:09,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:30:09,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 04:30:09,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-14 04:30:09,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:30:09,917 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:30:10,000 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:30:10,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2024-11-14 04:30:10,010 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:30:10,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 30 [2024-11-14 04:30:10,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:30:10,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789163336] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:30:10,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1066717877] [2024-11-14 04:30:10,146 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 04:30:10,147 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:30:10,147 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:30:10,147 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:30:10,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:30:11,024 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:30:12,341 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1197#(exists ((|v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_29| Int) (|v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_28| Int)) (and (or (and (= (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_28| 1) |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrpbrk_~s2#1.base|) 1) (= (select |#valid| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_29|) 1) (exists ((|v_#memory_int_79| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length2~0#1_54| Int) (|v_ULTIMATE.start_main_~length1~0#1_53| Int)) (and (<= (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_28| |v_ULTIMATE.start_main_~length1~0#1_53|) (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_29|)) (<= 1 (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_28| |v_ULTIMATE.start_main_~length1~0#1_53|)) (<= 1 (+ |v_ULTIMATE.start_main_~length2~0#1_54| |ULTIMATE.start_cstrpbrk_~s2#1.offset|)) (= |#memory_int| (store (store |v_#memory_int_79| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_29| (store (select |v_#memory_int_79| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_29|) (+ (- 1) |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_28| |v_ULTIMATE.start_main_~length1~0#1_53|) 0)) |ULTIMATE.start_cstrpbrk_~s2#1.base| (store (select (store |v_#memory_int_79| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_29| (store (select |v_#memory_int_79| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_29|) (+ (- 1) |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_28| |v_ULTIMATE.start_main_~length1~0#1_53|) 0)) |ULTIMATE.start_cstrpbrk_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_main_~length2~0#1_54| |ULTIMATE.start_cstrpbrk_~s2#1.offset|) 0))) (<= (+ |v_ULTIMATE.start_main_~length2~0#1_54| |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (select |#length| |ULTIMATE.start_cstrpbrk_~s2#1.base|)))) (= |ULTIMATE.start_cstrpbrk_~s1#1.base| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_29|)) (and (exists ((|v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_22| Int) (|v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_23| Int)) (and (= (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_23|) |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_22|) 0) (<= (+ |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_22| 1) (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_23|)) (= (select |#valid| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_23|) 1) (<= 0 |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_22|))) (= (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_28| 1) |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 1 |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_28|) (= |ULTIMATE.start_cstrpbrk_~s1#1.base| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_29|))) (or (< (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_29|) (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_28| 1)) (< |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_28| 0))))' at error location [2024-11-14 04:30:12,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:30:12,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:30:12,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2024-11-14 04:30:12,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358621210] [2024-11-14 04:30:12,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:30:12,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 04:30:12,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:30:12,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 04:30:12,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=835, Unknown=6, NotChecked=0, Total=930 [2024-11-14 04:30:12,345 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:12,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:30:12,543 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2024-11-14 04:30:12,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 04:30:12,544 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-14 04:30:12,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:30:12,544 INFO L225 Difference]: With dead ends: 34 [2024-11-14 04:30:12,545 INFO L226 Difference]: Without dead ends: 26 [2024-11-14 04:30:12,545 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=105, Invalid=945, Unknown=6, NotChecked=0, Total=1056 [2024-11-14 04:30:12,546 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:30:12,546 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 69 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:30:12,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-14 04:30:12,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2024-11-14 04:30:12,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.2173913043478262) 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 04:30:12,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-11-14 04:30:12,550 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2024-11-14 04:30:12,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:30:12,550 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-11-14 04:30:12,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:12,550 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-11-14 04:30:12,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-14 04:30:12,551 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:30:12,551 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:30:12,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 04:30:12,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 04:30:12,756 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:30:12,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:30:12,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1328660105, now seen corresponding path program 2 times [2024-11-14 04:30:12,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:30:12,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422152888] [2024-11-14 04:30:12,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:12,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:30:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:13,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:30:13,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:30:13,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422152888] [2024-11-14 04:30:13,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422152888] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:30:13,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727906387] [2024-11-14 04:30:13,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:30:13,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:30:13,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:30:13,117 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:30:13,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:30:13,247 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 04:30:13,247 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:30:13,249 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-14 04:30:13,251 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:30:13,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 04:30:13,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-14 04:30:13,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2024-11-14 04:30:13,622 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:30:13,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 15 [2024-11-14 04:30:13,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 04:30:13,714 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:30:14,052 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:30:14,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2024-11-14 04:30:14,063 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:30:14,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 30 [2024-11-14 04:30:14,070 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 5 treesize of output 3 [2024-11-14 04:30:14,082 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 21 treesize of output 17 [2024-11-14 04:30:14,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 04:30:14,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727906387] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:30:14,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [812749000] [2024-11-14 04:30:14,308 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 04:30:14,308 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:30:14,308 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:30:14,309 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:30:14,309 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:30:15,104 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:30:16,630 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1403#(exists ((|v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_37| Int) (|v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_38| Int)) (and (or (and (= (select |#valid| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_38|) 1) (= (select |#valid| |ULTIMATE.start_cstrpbrk_~s2#1.base|) 1) (= |ULTIMATE.start_cstrpbrk_~s1#1.base| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_38|) (= (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_37| 1) |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (exists ((|v_ULTIMATE.start_main_~length1~0#1_57| Int) (|v_ULTIMATE.start_main_~length2~0#1_57| Int) (|v_#memory_int_94| (Array Int (Array Int Int)))) (and (= |#memory_int| (store (store |v_#memory_int_94| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_38| (store (select |v_#memory_int_94| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_38|) (+ (- 1) |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_37| |v_ULTIMATE.start_main_~length1~0#1_57|) 0)) |ULTIMATE.start_cstrpbrk_~s2#1.base| (store (select (store |v_#memory_int_94| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_38| (store (select |v_#memory_int_94| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_38|) (+ (- 1) |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_37| |v_ULTIMATE.start_main_~length1~0#1_57|) 0)) |ULTIMATE.start_cstrpbrk_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_main_~length2~0#1_57| |ULTIMATE.start_cstrpbrk_~s2#1.offset|) 0))) (<= 1 (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_37| |v_ULTIMATE.start_main_~length1~0#1_57|)) (<= 1 (+ |v_ULTIMATE.start_main_~length2~0#1_57| |ULTIMATE.start_cstrpbrk_~s2#1.offset|)) (<= (+ |v_ULTIMATE.start_main_~length2~0#1_57| |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (select |#length| |ULTIMATE.start_cstrpbrk_~s2#1.base|)) (<= (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_37| |v_ULTIMATE.start_main_~length1~0#1_57|) (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_38|))))) (and (= |ULTIMATE.start_cstrpbrk_~s1#1.base| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_38|) (= (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_37| 1) |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (exists ((|v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_28| Int) (|v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_27| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_28|) 1) (<= 0 |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_27|) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_28|) |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_27|) 0) (<= (+ |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_27| 1) (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_28|)))) (<= 1 |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_37|))) (or (< |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_37| 0) (< (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_38|) (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_37| 1)))))' at error location [2024-11-14 04:30:16,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:30:16,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:30:16,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2024-11-14 04:30:16,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307141838] [2024-11-14 04:30:16,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:30:16,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-14 04:30:16,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:30:16,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-14 04:30:16,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1077, Unknown=2, NotChecked=0, Total=1190 [2024-11-14 04:30:16,634 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 23 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:17,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:30:17,166 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2024-11-14 04:30:17,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 04:30:17,166 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-14 04:30:17,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:30:17,167 INFO L225 Difference]: With dead ends: 33 [2024-11-14 04:30:17,167 INFO L226 Difference]: Without dead ends: 33 [2024-11-14 04:30:17,168 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=170, Invalid=1550, Unknown=2, NotChecked=0, Total=1722 [2024-11-14 04:30:17,169 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:30:17,169 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 91 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:30:17,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-14 04:30:17,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2024-11-14 04:30:17,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.2413793103448276) 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 04:30:17,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2024-11-14 04:30:17,172 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 19 [2024-11-14 04:30:17,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:30:17,173 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2024-11-14 04:30:17,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:17,173 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2024-11-14 04:30:17,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-14 04:30:17,174 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:30:17,174 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:30:17,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 04:30:17,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:30:17,378 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:30:17,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:30:17,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1761123792, now seen corresponding path program 1 times [2024-11-14 04:30:17,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:30:17,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743447628] [2024-11-14 04:30:17,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:17,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:30:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:17,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:30:17,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:30:17,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743447628] [2024-11-14 04:30:17,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743447628] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:30:17,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338988368] [2024-11-14 04:30:17,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:17,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:30:17,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:30:17,790 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:30:17,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 04:30:17,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:17,900 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-14 04:30:17,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:30:17,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:30:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:30:17,990 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:30:18,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-14 04:30:18,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-14 04:30:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:30:18,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338988368] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:30:18,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1364655416] [2024-11-14 04:30:18,073 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:30:18,073 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:30:18,073 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:30:18,073 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:30:18,073 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:30:18,887 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:30:19,870 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1624#(<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|)' at error location [2024-11-14 04:30:19,870 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:30:19,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:30:19,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2024-11-14 04:30:19,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622001444] [2024-11-14 04:30:19,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:30:19,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 04:30:19,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:30:19,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 04:30:19,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=716, Unknown=2, NotChecked=0, Total=812 [2024-11-14 04:30:19,873 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 04:30:20,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:30:20,085 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2024-11-14 04:30:20,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 04:30:20,086 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-14 04:30:20,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:30:20,086 INFO L225 Difference]: With dead ends: 52 [2024-11-14 04:30:20,086 INFO L226 Difference]: Without dead ends: 52 [2024-11-14 04:30:20,087 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=121, Invalid=999, Unknown=2, NotChecked=0, Total=1122 [2024-11-14 04:30:20,087 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:30:20,088 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 62 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:30:20,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-14 04:30:20,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2024-11-14 04:30:20,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:20,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2024-11-14 04:30:20,092 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 20 [2024-11-14 04:30:20,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:30:20,092 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2024-11-14 04:30:20,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 04:30:20,092 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2024-11-14 04:30:20,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 04:30:20,093 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:30:20,093 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:30:20,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 04:30:20,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:30:20,298 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:30:20,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:30:20,298 INFO L85 PathProgramCache]: Analyzing trace with hash -304064206, now seen corresponding path program 1 times [2024-11-14 04:30:20,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:30:20,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374106081] [2024-11-14 04:30:20,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:20,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:30:20,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 04:30:20,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:30:20,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374106081] [2024-11-14 04:30:20,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374106081] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:30:20,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026619689] [2024-11-14 04:30:20,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:20,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:30:20,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:30:20,569 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:30:20,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 04:30:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:20,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-14 04:30:20,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:30:20,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:30:20,866 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:30:20,907 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:30:20,907 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 19 treesize of output 23 [2024-11-14 04:30:20,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:30:20,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026619689] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:30:20,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [873696840] [2024-11-14 04:30:20,983 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 04:30:20,983 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:30:20,983 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:30:20,984 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:30:20,984 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:30:21,634 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:30:22,429 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1888#(<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|)' at error location [2024-11-14 04:30:22,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:30:22,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:30:22,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2024-11-14 04:30:22,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55176921] [2024-11-14 04:30:22,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:30:22,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-14 04:30:22,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:30:22,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-14 04:30:22,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=575, Unknown=1, NotChecked=0, Total=650 [2024-11-14 04:30:22,434 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 04:30:22,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:30:22,623 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2024-11-14 04:30:22,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 04:30:22,624 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-14 04:30:22,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:30:22,624 INFO L225 Difference]: With dead ends: 51 [2024-11-14 04:30:22,624 INFO L226 Difference]: Without dead ends: 51 [2024-11-14 04:30:22,625 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=115, Invalid=814, Unknown=1, NotChecked=0, Total=930 [2024-11-14 04:30:22,625 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 29 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:30:22,626 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 38 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:30:22,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-14 04:30:22,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-14 04:30:22,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 49 states have (on average 1.183673469387755) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:22,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2024-11-14 04:30:22,630 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 22 [2024-11-14 04:30:22,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:30:22,630 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2024-11-14 04:30:22,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 04:30:22,631 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2024-11-14 04:30:22,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 04:30:22,631 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:30:22,631 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:30:22,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 04:30:22,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 04:30:22,836 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:30:22,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:30:22,836 INFO L85 PathProgramCache]: Analyzing trace with hash -872006324, now seen corresponding path program 2 times [2024-11-14 04:30:22,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:30:22,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740924096] [2024-11-14 04:30:22,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:22,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:30:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:30:23,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:30:23,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740924096] [2024-11-14 04:30:23,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740924096] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:30:23,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998078974] [2024-11-14 04:30:23,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:30:23,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:30:23,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:30:23,202 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:30:23,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 04:30:23,306 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 04:30:23,306 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:30:23,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-14 04:30:23,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:30:23,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-14 04:30:23,602 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:30:23,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2024-11-14 04:30:23,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:30:23,737 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:30:24,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 04:30:24,163 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 20 treesize of output 16 [2024-11-14 04:30:24,170 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 13 treesize of output 9 [2024-11-14 04:30:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:30:24,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998078974] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:30:24,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [378387378] [2024-11-14 04:30:24,212 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:30:24,212 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:30:24,213 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:30:24,213 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:30:24,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:30:25,098 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:30:27,309 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2161#(<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|)' at error location [2024-11-14 04:30:27,310 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:30:27,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:30:27,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 22 [2024-11-14 04:30:27,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724052287] [2024-11-14 04:30:27,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:30:27,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-14 04:30:27,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:30:27,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-14 04:30:27,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2024-11-14 04:30:27,311 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:28,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:30:28,295 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2024-11-14 04:30:28,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 04:30:28,296 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-14 04:30:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:30:28,297 INFO L225 Difference]: With dead ends: 67 [2024-11-14 04:30:28,297 INFO L226 Difference]: Without dead ends: 67 [2024-11-14 04:30:28,297 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=217, Invalid=1853, Unknown=0, NotChecked=0, Total=2070 [2024-11-14 04:30:28,298 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 47 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:30:28,298 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 80 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:30:28,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-14 04:30:28,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2024-11-14 04:30:28,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 58 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:28,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2024-11-14 04:30:28,309 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 22 [2024-11-14 04:30:28,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:30:28,309 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2024-11-14 04:30:28,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:28,310 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2024-11-14 04:30:28,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-14 04:30:28,314 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:30:28,314 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:30:28,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-14 04:30:28,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 04:30:28,519 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:30:28,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:30:28,519 INFO L85 PathProgramCache]: Analyzing trace with hash -289852508, now seen corresponding path program 3 times [2024-11-14 04:30:28,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:30:28,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639489688] [2024-11-14 04:30:28,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:28,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:30:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:29,328 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:30:29,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:30:29,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639489688] [2024-11-14 04:30:29,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639489688] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:30:29,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756606741] [2024-11-14 04:30:29,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:30:29,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:30:29,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:30:29,332 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:30:29,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 04:30:29,483 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:30:29,483 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:30:29,486 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-14 04:30:29,489 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:30:29,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:30:29,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:30:29,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2024-11-14 04:30:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:30:32,270 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:30:32,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-11-14 04:30:32,605 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:30:32,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756606741] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:30:32,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [450057550] [2024-11-14 04:30:32,607 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 04:30:32,607 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:30:32,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:30:32,607 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:30:32,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:30:33,149 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:30:34,496 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2495#(exists ((|v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_66| Int) (|v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_65| Int)) (and (or (and (= (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_65| 1) |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (exists ((|v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_62| Int) (|v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_63| Int)) (and (<= 0 |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_62|) (<= (+ |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_62| 1) (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_63|)) (= (select |#valid| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_63|) 1) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_63|) |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_62|) 0))) (= |ULTIMATE.start_cstrpbrk_~s1#1.base| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_66|) (<= 1 |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_65|)) (and (= (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_65| 1) |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_66|) 1) (= |ULTIMATE.start_cstrpbrk_~s1#1.base| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_66|) (= (select |#valid| |ULTIMATE.start_cstrpbrk_~s2#1.base|) 1) (exists ((|v_ULTIMATE.start_main_~length2~0#1_72| Int) (|v_ULTIMATE.start_main_~length1~0#1_70| Int) (|v_#memory_int_149| (Array Int (Array Int Int)))) (and (<= (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_65| |v_ULTIMATE.start_main_~length1~0#1_70|) (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_66|)) (<= 1 (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_65| |v_ULTIMATE.start_main_~length1~0#1_70|)) (<= 1 (+ |v_ULTIMATE.start_main_~length2~0#1_72| |ULTIMATE.start_cstrpbrk_~s2#1.offset|)) (= |#memory_int| (store (store |v_#memory_int_149| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_66| (store (select |v_#memory_int_149| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_66|) (+ (- 1) |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_65| |v_ULTIMATE.start_main_~length1~0#1_70|) 0)) |ULTIMATE.start_cstrpbrk_~s2#1.base| (store (select (store |v_#memory_int_149| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_66| (store (select |v_#memory_int_149| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_66|) (+ (- 1) |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_65| |v_ULTIMATE.start_main_~length1~0#1_70|) 0)) |ULTIMATE.start_cstrpbrk_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_main_~length2~0#1_72| |ULTIMATE.start_cstrpbrk_~s2#1.offset|) 0))) (<= (+ |v_ULTIMATE.start_main_~length2~0#1_72| |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (select |#length| |ULTIMATE.start_cstrpbrk_~s2#1.base|)))))) (or (< |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_65| 0) (< (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_66|) (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_65| 1)))))' at error location [2024-11-14 04:30:34,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:30:34,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:30:34,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 11] total 32 [2024-11-14 04:30:34,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004787957] [2024-11-14 04:30:34,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:30:34,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-14 04:30:34,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:30:34,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-14 04:30:34,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1833, Unknown=3, NotChecked=0, Total=1980 [2024-11-14 04:30:34,498 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:35,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:30:35,259 INFO L93 Difference]: Finished difference Result 98 states and 110 transitions. [2024-11-14 04:30:35,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 04:30:35,260 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-14 04:30:35,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:30:35,260 INFO L225 Difference]: With dead ends: 98 [2024-11-14 04:30:35,260 INFO L226 Difference]: Without dead ends: 84 [2024-11-14 04:30:35,261 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=226, Invalid=2741, Unknown=3, NotChecked=0, Total=2970 [2024-11-14 04:30:35,261 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:30:35,261 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 97 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:30:35,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-14 04:30:35,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2024-11-14 04:30:35,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 79 states have (on average 1.1772151898734178) internal successors, (93), 80 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:35,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2024-11-14 04:30:35,266 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 25 [2024-11-14 04:30:35,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:30:35,267 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2024-11-14 04:30:35,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:35,267 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2024-11-14 04:30:35,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-14 04:30:35,268 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:30:35,268 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:30:35,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 04:30:35,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:30:35,475 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:30:35,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:30:35,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1167009905, now seen corresponding path program 3 times [2024-11-14 04:30:35,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:30:35,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560889724] [2024-11-14 04:30:35,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:35,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:30:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:30:36,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:30:36,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560889724] [2024-11-14 04:30:36,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560889724] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:30:36,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818563516] [2024-11-14 04:30:36,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:30:36,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:30:36,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:30:36,026 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:30:36,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 04:30:36,177 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:30:36,178 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:30:36,181 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-14 04:30:36,185 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:30:36,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:30:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:30:36,497 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:30:36,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 04:30:36,624 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 16 treesize of output 12 [2024-11-14 04:30:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:30:36,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818563516] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:30:36,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [962437088] [2024-11-14 04:30:36,745 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:30:36,745 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:30:36,745 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:30:36,745 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:30:36,745 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:30:37,858 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:30:39,873 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2886#(<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|)' at error location [2024-11-14 04:30:39,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:30:39,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:30:39,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 12] total 30 [2024-11-14 04:30:39,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121190588] [2024-11-14 04:30:39,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:30:39,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-14 04:30:39,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:30:39,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-14 04:30:39,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1656, Unknown=0, NotChecked=0, Total=1806 [2024-11-14 04:30:39,875 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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 04:30:40,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:30:40,273 INFO L93 Difference]: Finished difference Result 131 states and 146 transitions. [2024-11-14 04:30:40,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 04:30:40,273 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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 26 [2024-11-14 04:30:40,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:30:40,274 INFO L225 Difference]: With dead ends: 131 [2024-11-14 04:30:40,274 INFO L226 Difference]: Without dead ends: 119 [2024-11-14 04:30:40,275 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=198, Invalid=2252, Unknown=0, NotChecked=0, Total=2450 [2024-11-14 04:30:40,275 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 39 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:30:40,275 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 178 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:30:40,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-14 04:30:40,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2024-11-14 04:30:40,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 108 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:40,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2024-11-14 04:30:40,280 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 26 [2024-11-14 04:30:40,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:30:40,280 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2024-11-14 04:30:40,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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 04:30:40,281 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2024-11-14 04:30:40,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-14 04:30:40,281 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:30:40,281 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:30:40,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 04:30:40,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:30:40,482 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:30:40,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:30:40,483 INFO L85 PathProgramCache]: Analyzing trace with hash -378857455, now seen corresponding path program 4 times [2024-11-14 04:30:40,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:30:40,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154974324] [2024-11-14 04:30:40,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:40,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:30:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:40,764 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:30:40,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:30:40,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154974324] [2024-11-14 04:30:40,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154974324] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:30:40,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261585882] [2024-11-14 04:30:40,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:30:40,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:30:40,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:30:40,767 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:30:40,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 04:30:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:40,873 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-14 04:30:40,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:30:41,044 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:30:41,044 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:30:41,273 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 7 treesize of output 5 [2024-11-14 04:30:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:30:41,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261585882] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:30:41,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [94142520] [2024-11-14 04:30:41,319 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 04:30:41,319 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:30:41,319 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:30:41,319 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:30:41,319 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:30:42,474 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:30:44,019 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3332#(exists ((|v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_81| Int) (|v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_81| Int)) (and (= |ULTIMATE.start_cstrpbrk_~s1#1.base| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_81|) (<= (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_81|) |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_81|) (= (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_81| 1) |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 1 |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_81|) (exists ((|v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_82| Int) (|v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_83| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_83|) 1) (<= (+ |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_82| 1) (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_83|)) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_83|) |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_82|) 0) (<= 0 |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_82|)))))' at error location [2024-11-14 04:30:44,019 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:30:44,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:30:44,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2024-11-14 04:30:44,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47753755] [2024-11-14 04:30:44,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:30:44,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-14 04:30:44,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:30:44,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-14 04:30:44,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1134, Unknown=1, NotChecked=0, Total=1260 [2024-11-14 04:30:44,021 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand has 23 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:44,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:30:44,336 INFO L93 Difference]: Finished difference Result 141 states and 159 transitions. [2024-11-14 04:30:44,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 04:30:44,336 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-14 04:30:44,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:30:44,337 INFO L225 Difference]: With dead ends: 141 [2024-11-14 04:30:44,337 INFO L226 Difference]: Without dead ends: 141 [2024-11-14 04:30:44,338 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=152, Invalid=1329, Unknown=1, NotChecked=0, Total=1482 [2024-11-14 04:30:44,338 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:30:44,339 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 133 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:30:44,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-11-14 04:30:44,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2024-11-14 04:30:44,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 136 states have (on average 1.161764705882353) internal successors, (158), 137 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:44,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 158 transitions. [2024-11-14 04:30:44,345 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 158 transitions. Word has length 27 [2024-11-14 04:30:44,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:30:44,346 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 158 transitions. [2024-11-14 04:30:44,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:44,346 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 158 transitions. [2024-11-14 04:30:44,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-14 04:30:44,347 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:30:44,347 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:30:44,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 04:30:44,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-14 04:30:44,552 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:30:44,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:30:44,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1993207211, now seen corresponding path program 4 times [2024-11-14 04:30:44,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:30:44,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495924090] [2024-11-14 04:30:44,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:44,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:30:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:30:45,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:30:45,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495924090] [2024-11-14 04:30:45,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495924090] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:30:45,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514990666] [2024-11-14 04:30:45,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:30:45,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:30:45,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:30:45,079 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:30:45,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 04:30:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:45,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-14 04:30:45,205 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:30:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:30:45,447 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:30:45,792 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 7 treesize of output 5 [2024-11-14 04:30:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:30:45,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514990666] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:30:45,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1484368847] [2024-11-14 04:30:45,862 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:30:45,863 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:30:45,863 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:30:45,863 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:30:45,863 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:30:46,501 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:30:47,459 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3819#(<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|)' at error location [2024-11-14 04:30:47,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:30:47,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:30:47,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2024-11-14 04:30:47,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539552364] [2024-11-14 04:30:47,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:30:47,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-14 04:30:47,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:30:47,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-14 04:30:47,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1287, Unknown=2, NotChecked=0, Total=1406 [2024-11-14 04:30:47,461 INFO L87 Difference]: Start difference. First operand 138 states and 158 transitions. Second operand has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:47,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:30:47,953 INFO L93 Difference]: Finished difference Result 175 states and 197 transitions. [2024-11-14 04:30:47,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 04:30:47,955 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-14 04:30:47,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:30:47,957 INFO L225 Difference]: With dead ends: 175 [2024-11-14 04:30:47,957 INFO L226 Difference]: Without dead ends: 175 [2024-11-14 04:30:47,957 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=184, Invalid=1794, Unknown=2, NotChecked=0, Total=1980 [2024-11-14 04:30:47,959 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 68 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:30:47,960 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 176 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:30:47,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-14 04:30:47,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 154. [2024-11-14 04:30:47,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 152 states have (on average 1.1644736842105263) internal successors, (177), 153 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:47,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 177 transitions. [2024-11-14 04:30:47,969 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 177 transitions. Word has length 28 [2024-11-14 04:30:47,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:30:47,969 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 177 transitions. [2024-11-14 04:30:47,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:47,969 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 177 transitions. [2024-11-14 04:30:47,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-14 04:30:47,971 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:30:47,971 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:30:47,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-14 04:30:48,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:30:48,175 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:30:48,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:30:48,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1595621486, now seen corresponding path program 5 times [2024-11-14 04:30:48,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:30:48,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954062965] [2024-11-14 04:30:48,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:48,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:30:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:30:49,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:30:49,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954062965] [2024-11-14 04:30:49,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954062965] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:30:49,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120204432] [2024-11-14 04:30:49,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:30:49,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:30:49,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:30:49,757 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:30:49,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 04:30:49,902 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 04:30:49,902 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:30:49,904 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-14 04:30:49,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:30:50,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:30:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:30:50,163 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:30:50,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 04:30:50,207 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 16 treesize of output 12 [2024-11-14 04:30:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:30:50,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120204432] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:30:50,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2108938728] [2024-11-14 04:30:50,295 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:30:50,295 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:30:50,295 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:30:50,295 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:30:50,295 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:30:50,859 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:30:52,090 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4388#(<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|)' at error location [2024-11-14 04:30:52,090 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:30:52,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:30:52,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 29 [2024-11-14 04:30:52,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990405220] [2024-11-14 04:30:52,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:30:52,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-14 04:30:52,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:30:52,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-14 04:30:52,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1520, Unknown=2, NotChecked=0, Total=1640 [2024-11-14 04:30:52,092 INFO L87 Difference]: Start difference. First operand 154 states and 177 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:53,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:30:53,186 INFO L93 Difference]: Finished difference Result 241 states and 271 transitions. [2024-11-14 04:30:53,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 04:30:53,188 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-14 04:30:53,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:30:53,189 INFO L225 Difference]: With dead ends: 241 [2024-11-14 04:30:53,189 INFO L226 Difference]: Without dead ends: 225 [2024-11-14 04:30:53,191 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=251, Invalid=2939, Unknown=2, NotChecked=0, Total=3192 [2024-11-14 04:30:53,192 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 89 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:30:53,192 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 296 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:30:53,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-11-14 04:30:53,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 204. [2024-11-14 04:30:53,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 202 states have (on average 1.1633663366336633) internal successors, (235), 203 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:53,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 235 transitions. [2024-11-14 04:30:53,206 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 235 transitions. Word has length 32 [2024-11-14 04:30:53,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:30:53,206 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 235 transitions. [2024-11-14 04:30:53,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:53,207 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 235 transitions. [2024-11-14 04:30:53,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-14 04:30:53,210 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:30:53,210 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:30:53,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 04:30:53,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:30:53,415 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:30:53,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:30:53,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1595623212, now seen corresponding path program 5 times [2024-11-14 04:30:53,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:30:53,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76473799] [2024-11-14 04:30:53,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:53,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:30:53,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:54,128 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:30:54,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:30:54,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76473799] [2024-11-14 04:30:54,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76473799] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:30:54,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809881881] [2024-11-14 04:30:54,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:30:54,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:30:54,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:30:54,132 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:30:54,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 04:30:54,291 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 04:30:54,291 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:30:54,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-14 04:30:54,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:30:54,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:30:54,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:30:54,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2024-11-14 04:30:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:30:55,239 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:30:55,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-11-14 04:30:55,632 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:30:55,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809881881] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:30:55,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2036782250] [2024-11-14 04:30:55,634 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 04:30:55,634 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:30:55,634 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:30:55,634 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:30:55,634 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:30:56,077 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:30:57,605 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5105#(exists ((|v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_102| Int) (|v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_102| Int)) (and (or (< |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_102| 0) (< (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_102|) (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_102| 1))) (or (and (exists ((|v_ULTIMATE.start_main_~length2~0#1_90| Int) (|v_#memory_int_219| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length1~0#1_86| Int)) (and (<= 1 (+ |v_ULTIMATE.start_main_~length2~0#1_90| |ULTIMATE.start_cstrpbrk_~s2#1.offset|)) (<= (+ |v_ULTIMATE.start_main_~length2~0#1_90| |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (select |#length| |ULTIMATE.start_cstrpbrk_~s2#1.base|)) (<= (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_102| |v_ULTIMATE.start_main_~length1~0#1_86|) (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_102|)) (= |#memory_int| (store (store |v_#memory_int_219| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_102| (store (select |v_#memory_int_219| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_102|) (+ (- 1) |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_102| |v_ULTIMATE.start_main_~length1~0#1_86|) 0)) |ULTIMATE.start_cstrpbrk_~s2#1.base| (store (select (store |v_#memory_int_219| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_102| (store (select |v_#memory_int_219| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_102|) (+ (- 1) |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_102| |v_ULTIMATE.start_main_~length1~0#1_86|) 0)) |ULTIMATE.start_cstrpbrk_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_main_~length2~0#1_90| |ULTIMATE.start_cstrpbrk_~s2#1.offset|) 0))) (<= 1 (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_102| |v_ULTIMATE.start_main_~length1~0#1_86|)))) (= (select |#valid| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_102|) 1) (= (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_102| 1) |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrpbrk_~s2#1.base|) 1) (= |ULTIMATE.start_cstrpbrk_~s1#1.base| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_102|)) (and (<= 1 |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_102|) (exists ((|v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_117| Int) (|v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_117| Int)) (and (<= 0 |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_117|) (<= (+ |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_117| 1) (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_117|)) (= (select |#valid| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_117|) 1) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_117|) |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_117|) 0))) (= (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_102| 1) |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (= |ULTIMATE.start_cstrpbrk_~s1#1.base| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_102|)))))' at error location [2024-11-14 04:30:57,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:30:57,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:30:57,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 13] total 35 [2024-11-14 04:30:57,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326953960] [2024-11-14 04:30:57,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:30:57,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-14 04:30:57,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:30:57,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-14 04:30:57,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2108, Unknown=2, NotChecked=0, Total=2256 [2024-11-14 04:30:57,607 INFO L87 Difference]: Start difference. First operand 204 states and 235 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:58,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:30:58,394 INFO L93 Difference]: Finished difference Result 332 states and 376 transitions. [2024-11-14 04:30:58,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-14 04:30:58,394 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-14 04:30:58,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:30:58,395 INFO L225 Difference]: With dead ends: 332 [2024-11-14 04:30:58,395 INFO L226 Difference]: Without dead ends: 254 [2024-11-14 04:30:58,397 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=227, Invalid=3193, Unknown=2, NotChecked=0, Total=3422 [2024-11-14 04:30:58,397 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 10 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:30:58,397 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 305 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:30:58,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-11-14 04:30:58,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 234. [2024-11-14 04:30:58,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 232 states have (on average 1.168103448275862) internal successors, (271), 233 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:58,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 271 transitions. [2024-11-14 04:30:58,406 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 271 transitions. Word has length 33 [2024-11-14 04:30:58,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:30:58,407 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 271 transitions. [2024-11-14 04:30:58,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:30:58,407 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 271 transitions. [2024-11-14 04:30:58,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 04:30:58,408 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:30:58,408 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:30:58,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 04:30:58,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:30:58,609 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:30:58,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:30:58,609 INFO L85 PathProgramCache]: Analyzing trace with hash 872305034, now seen corresponding path program 6 times [2024-11-14 04:30:58,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:30:58,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347866570] [2024-11-14 04:30:58,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:58,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:30:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:30:59,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:30:59,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347866570] [2024-11-14 04:30:59,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347866570] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:30:59,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922608341] [2024-11-14 04:30:59,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:30:59,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:30:59,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:30:59,200 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:30:59,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 04:30:59,336 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:30:59,336 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:30:59,339 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-14 04:30:59,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:30:59,633 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:30:59,633 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:31:00,053 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 7 treesize of output 5 [2024-11-14 04:31:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:31:00,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922608341] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:31:00,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1098098042] [2024-11-14 04:31:00,150 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:31:00,150 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:31:00,150 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:31:00,151 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:31:00,151 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:31:00,926 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:31:02,013 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5934#(<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|)' at error location [2024-11-14 04:31:02,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:31:02,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:31:02,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2024-11-14 04:31:02,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843475879] [2024-11-14 04:31:02,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:31:02,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-14 04:31:02,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:31:02,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-14 04:31:02,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1580, Unknown=2, NotChecked=0, Total=1722 [2024-11-14 04:31:02,015 INFO L87 Difference]: Start difference. First operand 234 states and 271 transitions. Second operand has 31 states, 30 states have (on average 2.433333333333333) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:02,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:31:02,651 INFO L93 Difference]: Finished difference Result 294 states and 334 transitions. [2024-11-14 04:31:02,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-14 04:31:02,651 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.433333333333333) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-14 04:31:02,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:31:02,652 INFO L225 Difference]: With dead ends: 294 [2024-11-14 04:31:02,652 INFO L226 Difference]: Without dead ends: 294 [2024-11-14 04:31:02,653 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 64 SyntacticMatches, 9 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=230, Invalid=2318, Unknown=2, NotChecked=0, Total=2550 [2024-11-14 04:31:02,654 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 84 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:31:02,654 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 225 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:31:02,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2024-11-14 04:31:02,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 254. [2024-11-14 04:31:02,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 252 states have (on average 1.1706349206349207) internal successors, (295), 253 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:02,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 295 transitions. [2024-11-14 04:31:02,665 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 295 transitions. Word has length 34 [2024-11-14 04:31:02,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:31:02,665 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 295 transitions. [2024-11-14 04:31:02,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.433333333333333) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:02,666 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 295 transitions. [2024-11-14 04:31:02,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 04:31:02,666 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:31:02,667 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:31:02,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-14 04:31:02,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:31:02,870 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:31:02,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:31:02,871 INFO L85 PathProgramCache]: Analyzing trace with hash 751595161, now seen corresponding path program 6 times [2024-11-14 04:31:02,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:31:02,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366022083] [2024-11-14 04:31:02,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:31:02,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:31:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:31:03,270 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:31:03,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:31:03,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366022083] [2024-11-14 04:31:03,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366022083] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:31:03,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294963481] [2024-11-14 04:31:03,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:31:03,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:31:03,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:31:03,273 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:31:03,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 04:31:03,450 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:31:03,450 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:31:03,452 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-14 04:31:03,454 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:31:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:31:03,689 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:31:03,946 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 04:31:04,088 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:31:04,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294963481] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:31:04,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [237865033] [2024-11-14 04:31:04,092 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 04:31:04,092 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:31:04,092 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:31:04,093 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:31:04,093 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:31:04,627 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:31:05,601 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6744#(exists ((|v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_118| Int) (|v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_118| Int)) (and (or (and (exists ((|v_ULTIMATE.start_main_~length1~0#1_92| Int) (|v_#memory_int_248| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~length2~0#1_96| Int)) (and (<= (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_118| |v_ULTIMATE.start_main_~length1~0#1_92|) (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_118|)) (<= (+ |v_ULTIMATE.start_main_~length2~0#1_96| |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (select |#length| |ULTIMATE.start_cstrpbrk_~s2#1.base|)) (= |#memory_int| (store (store |v_#memory_int_248| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_118| (store (select |v_#memory_int_248| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_118|) (+ (- 1) |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_118| |v_ULTIMATE.start_main_~length1~0#1_92|) 0)) |ULTIMATE.start_cstrpbrk_~s2#1.base| (store (select (store |v_#memory_int_248| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_118| (store (select |v_#memory_int_248| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_118|) (+ (- 1) |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_118| |v_ULTIMATE.start_main_~length1~0#1_92|) 0)) |ULTIMATE.start_cstrpbrk_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_main_~length2~0#1_96| |ULTIMATE.start_cstrpbrk_~s2#1.offset|) 0))) (<= 1 (+ |v_ULTIMATE.start_main_~length2~0#1_96| |ULTIMATE.start_cstrpbrk_~s2#1.offset|)) (<= 1 (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_118| |v_ULTIMATE.start_main_~length1~0#1_92|)))) (= (select |#valid| |ULTIMATE.start_cstrpbrk_~s2#1.base|) 1) (= (select |#valid| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_118|) 1) (= (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_118| 1) |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (= |ULTIMATE.start_cstrpbrk_~s1#1.base| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_118|)) (and (exists ((|v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_139| Int) (|v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_140| Int)) (and (<= (+ |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_140| 1) (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_139|)) (<= 0 |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_140|) (= (select |#valid| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_139|) 1) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_139|) |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_140|) 0))) (= (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_118| 1) |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 1 |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_118|) (= |ULTIMATE.start_cstrpbrk_~s1#1.base| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_118|))) (or (< (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_118|) (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_118| 1)) (< |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_118| 0))))' at error location [2024-11-14 04:31:05,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:31:05,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:31:05,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2024-11-14 04:31:05,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743834356] [2024-11-14 04:31:05,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:31:05,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-14 04:31:05,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:31:05,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-14 04:31:05,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1469, Unknown=2, NotChecked=0, Total=1640 [2024-11-14 04:31:05,603 INFO L87 Difference]: Start difference. First operand 254 states and 295 transitions. Second operand has 29 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:05,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:31:05,953 INFO L93 Difference]: Finished difference Result 309 states and 355 transitions. [2024-11-14 04:31:05,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 04:31:05,954 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-14 04:31:05,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:31:05,955 INFO L225 Difference]: With dead ends: 309 [2024-11-14 04:31:05,955 INFO L226 Difference]: Without dead ends: 309 [2024-11-14 04:31:05,955 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=199, Invalid=1691, Unknown=2, NotChecked=0, Total=1892 [2024-11-14 04:31:05,956 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 25 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:31:05,956 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 246 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:31:05,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2024-11-14 04:31:05,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 305. [2024-11-14 04:31:05,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 303 states have (on average 1.1683168316831682) internal successors, (354), 304 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:05,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 354 transitions. [2024-11-14 04:31:05,965 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 354 transitions. Word has length 35 [2024-11-14 04:31:05,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:31:05,965 INFO L471 AbstractCegarLoop]: Abstraction has 305 states and 354 transitions. [2024-11-14 04:31:05,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:05,965 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 354 transitions. [2024-11-14 04:31:05,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-14 04:31:05,966 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:31:05,966 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:31:05,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-14 04:31:06,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-14 04:31:06,170 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:31:06,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:31:06,171 INFO L85 PathProgramCache]: Analyzing trace with hash -2086101811, now seen corresponding path program 7 times [2024-11-14 04:31:06,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:31:06,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216038859] [2024-11-14 04:31:06,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:31:06,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:31:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:31:06,725 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:31:06,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:31:06,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216038859] [2024-11-14 04:31:06,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216038859] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:31:06,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675859969] [2024-11-14 04:31:06,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:31:06,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:31:06,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:31:06,729 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:31:06,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 04:31:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:31:06,877 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-14 04:31:06,879 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:31:07,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:31:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:31:07,170 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:31:07,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 04:31:07,207 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 16 treesize of output 12 [2024-11-14 04:31:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:31:07,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675859969] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:31:07,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [36708391] [2024-11-14 04:31:07,283 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:31:07,284 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:31:07,284 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:31:07,284 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:31:07,284 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:31:07,801 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:31:08,877 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7627#(<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|)' at error location [2024-11-14 04:31:08,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:31:08,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:31:08,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 29 [2024-11-14 04:31:08,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15163560] [2024-11-14 04:31:08,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:31:08,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-14 04:31:08,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:31:08,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-14 04:31:08,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1505, Unknown=2, NotChecked=0, Total=1640 [2024-11-14 04:31:08,880 INFO L87 Difference]: Start difference. First operand 305 states and 354 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:09,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:31:09,636 INFO L93 Difference]: Finished difference Result 476 states and 542 transitions. [2024-11-14 04:31:09,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-14 04:31:09,636 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-11-14 04:31:09,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:31:09,638 INFO L225 Difference]: With dead ends: 476 [2024-11-14 04:31:09,638 INFO L226 Difference]: Without dead ends: 427 [2024-11-14 04:31:09,639 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=202, Invalid=2448, Unknown=2, NotChecked=0, Total=2652 [2024-11-14 04:31:09,639 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 69 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:31:09,640 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 402 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:31:09,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2024-11-14 04:31:09,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 387. [2024-11-14 04:31:09,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 385 states have (on average 1.1688311688311688) internal successors, (450), 386 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:09,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 450 transitions. [2024-11-14 04:31:09,651 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 450 transitions. Word has length 38 [2024-11-14 04:31:09,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:31:09,652 INFO L471 AbstractCegarLoop]: Abstraction has 387 states and 450 transitions. [2024-11-14 04:31:09,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:09,652 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 450 transitions. [2024-11-14 04:31:09,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-14 04:31:09,653 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:31:09,653 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:31:09,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-14 04:31:09,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-14 04:31:09,856 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:31:09,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:31:09,856 INFO L85 PathProgramCache]: Analyzing trace with hash -177641239, now seen corresponding path program 8 times [2024-11-14 04:31:09,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:31:09,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117799037] [2024-11-14 04:31:09,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:31:09,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:31:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:31:10,516 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:31:10,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:31:10,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117799037] [2024-11-14 04:31:10,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117799037] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:31:10,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601201773] [2024-11-14 04:31:10,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:31:10,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:31:10,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:31:10,519 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:31:10,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-14 04:31:10,675 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 04:31:10,675 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:31:10,678 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-14 04:31:10,679 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:31:10,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:31:11,685 INFO L349 Elim1Store]: treesize reduction 8, result has 84.9 percent of original size [2024-11-14 04:31:11,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 59 [2024-11-14 04:31:12,021 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 04:31:12,021 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:31:17,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-11-14 04:31:17,728 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:17,728 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 56 treesize of output 76 [2024-11-14 04:31:17,737 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 13 treesize of output 9 [2024-11-14 04:31:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 04:31:17,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601201773] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:31:17,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [381902626] [2024-11-14 04:31:17,992 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:31:17,992 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:31:17,992 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:31:17,992 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:31:17,992 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:31:18,475 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:31:20,213 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8809#(<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|)' at error location [2024-11-14 04:31:20,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:31:20,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:31:20,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 17] total 50 [2024-11-14 04:31:20,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039778568] [2024-11-14 04:31:20,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:31:20,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-14 04:31:20,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:31:20,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-14 04:31:20,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=3599, Unknown=2, NotChecked=0, Total=3906 [2024-11-14 04:31:20,216 INFO L87 Difference]: Start difference. First operand 387 states and 450 transitions. Second operand has 51 states, 50 states have (on average 2.12) internal successors, (106), 51 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:26,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:31:26,403 INFO L93 Difference]: Finished difference Result 558 states and 636 transitions. [2024-11-14 04:31:26,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-14 04:31:26,403 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 2.12) internal successors, (106), 51 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-14 04:31:26,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:31:26,406 INFO L225 Difference]: With dead ends: 558 [2024-11-14 04:31:26,406 INFO L226 Difference]: Without dead ends: 558 [2024-11-14 04:31:26,409 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2838 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=1092, Invalid=10678, Unknown=2, NotChecked=0, Total=11772 [2024-11-14 04:31:26,409 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 170 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 1744 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 1757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:31:26,410 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 318 Invalid, 1757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1744 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-14 04:31:26,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2024-11-14 04:31:26,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 459. [2024-11-14 04:31:26,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 457 states have (on average 1.175054704595186) internal successors, (537), 458 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:26,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 537 transitions. [2024-11-14 04:31:26,428 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 537 transitions. Word has length 40 [2024-11-14 04:31:26,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:31:26,428 INFO L471 AbstractCegarLoop]: Abstraction has 459 states and 537 transitions. [2024-11-14 04:31:26,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 2.12) internal successors, (106), 51 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:26,428 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 537 transitions. [2024-11-14 04:31:26,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-14 04:31:26,429 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:31:26,430 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:31:26,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-14 04:31:26,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-14 04:31:26,630 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:31:26,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:31:26,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1207146420, now seen corresponding path program 7 times [2024-11-14 04:31:26,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:31:26,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347349873] [2024-11-14 04:31:26,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:31:26,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:31:26,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:31:27,732 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:31:27,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:31:27,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347349873] [2024-11-14 04:31:27,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347349873] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:31:27,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352449819] [2024-11-14 04:31:27,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:31:27,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:31:27,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:31:27,734 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:31:27,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-14 04:31:27,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:31:27,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-14 04:31:27,870 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:31:27,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 04:31:28,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:31:28,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-14 04:31:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:31:28,237 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:31:28,362 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:28,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 04:31:28,371 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:28,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2024-11-14 04:31:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:31:28,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352449819] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:31:28,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [208738996] [2024-11-14 04:31:28,508 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 04:31:28,508 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:31:28,508 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:31:28,508 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:31:28,508 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:31:29,005 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:31:30,692 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10203#(exists ((|v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_141| Int) (|v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_141| Int)) (and (or (< |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_141| 0) (< (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_141|) (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_141| 1))) (or (and (= |ULTIMATE.start_cstrpbrk_~s1#1.base| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_141|) (= (select |#valid| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_141|) 1) (= (select |#valid| |ULTIMATE.start_cstrpbrk_~s2#1.base|) 1) (exists ((|v_ULTIMATE.start_main_~length2~0#1_107| Int) (|v_ULTIMATE.start_main_~length1~0#1_102| Int) (|v_#memory_int_296| (Array Int (Array Int Int)))) (and (<= 1 (+ |v_ULTIMATE.start_main_~length2~0#1_107| |ULTIMATE.start_cstrpbrk_~s2#1.offset|)) (= |#memory_int| (store (store |v_#memory_int_296| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_141| (store (select |v_#memory_int_296| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_141|) (+ (- 1) |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_141| |v_ULTIMATE.start_main_~length1~0#1_102|) 0)) |ULTIMATE.start_cstrpbrk_~s2#1.base| (store (select (store |v_#memory_int_296| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_141| (store (select |v_#memory_int_296| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_141|) (+ (- 1) |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_141| |v_ULTIMATE.start_main_~length1~0#1_102|) 0)) |ULTIMATE.start_cstrpbrk_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_main_~length2~0#1_107| |ULTIMATE.start_cstrpbrk_~s2#1.offset|) 0))) (<= (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_141| |v_ULTIMATE.start_main_~length1~0#1_102|) (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_141|)) (<= 1 (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_141| |v_ULTIMATE.start_main_~length1~0#1_102|)) (<= (+ |v_ULTIMATE.start_main_~length2~0#1_107| |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (select |#length| |ULTIMATE.start_cstrpbrk_~s2#1.base|)))) (= (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_141| 1) |ULTIMATE.start_cstrpbrk_~s1#1.offset|)) (and (= |ULTIMATE.start_cstrpbrk_~s1#1.base| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_141|) (<= 1 |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_141|) (exists ((|v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_185| Int) (|v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_184| Int)) (and (= 0 (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_184|) |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_185|)) (<= (+ |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_185| 1) (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_184|)) (<= 0 |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_185|) (= (select |#valid| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_184|) 1))) (= (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_141| 1) |ULTIMATE.start_cstrpbrk_~s1#1.offset|)))))' at error location [2024-11-14 04:31:30,693 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:31:30,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:31:30,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 15] total 32 [2024-11-14 04:31:30,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115386673] [2024-11-14 04:31:30,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:31:30,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-14 04:31:30,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:31:30,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-14 04:31:30,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1855, Unknown=11, NotChecked=0, Total=1980 [2024-11-14 04:31:30,695 INFO L87 Difference]: Start difference. First operand 459 states and 537 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:31,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:31:31,843 INFO L93 Difference]: Finished difference Result 744 states and 862 transitions. [2024-11-14 04:31:31,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 04:31:31,844 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-14 04:31:31,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:31:31,846 INFO L225 Difference]: With dead ends: 744 [2024-11-14 04:31:31,847 INFO L226 Difference]: Without dead ends: 577 [2024-11-14 04:31:31,848 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=196, Invalid=3215, Unknown=11, NotChecked=0, Total=3422 [2024-11-14 04:31:31,849 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:31:31,849 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 475 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 04:31:31,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2024-11-14 04:31:31,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 507. [2024-11-14 04:31:31,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 505 states have (on average 1.1782178217821782) internal successors, (595), 506 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:31,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 595 transitions. [2024-11-14 04:31:31,868 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 595 transitions. Word has length 41 [2024-11-14 04:31:31,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:31:31,869 INFO L471 AbstractCegarLoop]: Abstraction has 507 states and 595 transitions. [2024-11-14 04:31:31,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:31,869 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 595 transitions. [2024-11-14 04:31:31,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-14 04:31:31,870 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:31:31,870 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:31:31,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-14 04:31:32,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-14 04:31:32,071 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:31:32,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:31:32,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1655767585, now seen corresponding path program 8 times [2024-11-14 04:31:32,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:31:32,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762034562] [2024-11-14 04:31:32,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:31:32,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:31:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:31:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:31:32,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:31:32,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762034562] [2024-11-14 04:31:32,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762034562] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:31:32,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888194440] [2024-11-14 04:31:32,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:31:32,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:31:32,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:31:32,566 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:31:32,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-14 04:31:32,714 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 04:31:32,714 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:31:32,716 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-14 04:31:32,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:31:32,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 04:31:32,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-14 04:31:32,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2024-11-14 04:31:46,932 INFO L349 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2024-11-14 04:31:46,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 39 [2024-11-14 04:31:47,165 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 40 refuted. 9 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 04:31:47,165 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:31:51,068 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:51,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 44 [2024-11-14 04:31:51,126 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:51,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 120 [2024-11-14 04:31:51,165 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:51,165 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 30 treesize of output 50 [2024-11-14 04:31:51,178 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 13 treesize of output 9 [2024-11-14 04:31:51,866 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 1 proven. 64 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:31:51,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888194440] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:31:51,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1999211910] [2024-11-14 04:31:51,868 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 04:31:51,868 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:31:51,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:31:51,868 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:31:51,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:31:52,309 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:31:54,043 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11797#(exists ((|v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_158| Int) (|v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_158| Int)) (and (or (and (= |ULTIMATE.start_cstrpbrk_~s1#1.base| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_158|) (<= 1 |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_158|) (= (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_158| 1) |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (exists ((|v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_196| Int) (|v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_195| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_195|) 1) (<= (+ |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_196| 1) (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_195|)) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_195|) |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_196|) 0) (<= 0 |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_196|)))) (and (= |ULTIMATE.start_cstrpbrk_~s1#1.base| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_158|) (= (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_158| 1) |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (exists ((|v_ULTIMATE.start_main_~length2~0#1_110| Int) (|v_ULTIMATE.start_main_~length1~0#1_106| Int) (|v_#memory_int_314| (Array Int (Array Int Int)))) (and (<= (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_158| |v_ULTIMATE.start_main_~length1~0#1_106|) (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_158|)) (<= 1 (+ |v_ULTIMATE.start_main_~length2~0#1_110| |ULTIMATE.start_cstrpbrk_~s2#1.offset|)) (= |#memory_int| (store (store |v_#memory_int_314| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_158| (store (select |v_#memory_int_314| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_158|) (+ (- 1) |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_158| |v_ULTIMATE.start_main_~length1~0#1_106|) 0)) |ULTIMATE.start_cstrpbrk_~s2#1.base| (store (select (store |v_#memory_int_314| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_158| (store (select |v_#memory_int_314| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_158|) (+ (- 1) |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_158| |v_ULTIMATE.start_main_~length1~0#1_106|) 0)) |ULTIMATE.start_cstrpbrk_~s2#1.base|) (+ (- 1) |v_ULTIMATE.start_main_~length2~0#1_110| |ULTIMATE.start_cstrpbrk_~s2#1.offset|) 0))) (<= 1 (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_158| |v_ULTIMATE.start_main_~length1~0#1_106|)) (<= (+ |v_ULTIMATE.start_main_~length2~0#1_110| |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (select |#length| |ULTIMATE.start_cstrpbrk_~s2#1.base|)))) (= (select |#valid| |ULTIMATE.start_cstrpbrk_~s2#1.base|) 1) (= (select |#valid| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_158|) 1))) (or (< |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_158| 0) (< (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post2#1.base_158|) (+ |v_ULTIMATE.start_cstrpbrk_#t~post2#1.offset_158| 1)))))' at error location [2024-11-14 04:31:54,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:31:54,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:31:54,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 19] total 49 [2024-11-14 04:31:54,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022034373] [2024-11-14 04:31:54,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:31:54,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-14 04:31:54,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:31:54,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-14 04:31:54,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=3592, Unknown=6, NotChecked=0, Total=3906 [2024-11-14 04:31:54,045 INFO L87 Difference]: Start difference. First operand 507 states and 595 transitions. Second operand has 51 states, 50 states have (on average 2.42) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:56,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:32:08,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:32:14,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:32:17,338 WARN L539 Checker$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 04:32:20,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:32:29,224 WARN L539 Checker$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 04:32:31,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:32:44,091 WARN L539 Checker$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 04:32:52,999 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 04:32:53,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:32:53,125 INFO L93 Difference]: Finished difference Result 661 states and 763 transitions. [2024-11-14 04:32:53,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-14 04:32:53,125 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 2.42) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-11-14 04:32:53,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:32:53,127 INFO L225 Difference]: With dead ends: 661 [2024-11-14 04:32:53,127 INFO L226 Difference]: Without dead ends: 405 [2024-11-14 04:32:53,128 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2247 ImplicationChecksByTransitivity, 59.4s TimeCoverageRelationStatistics Valid=898, Invalid=8397, Unknown=17, NotChecked=0, Total=9312 [2024-11-14 04:32:53,128 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 109 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 5 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:32:53,129 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 343 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1109 Invalid, 9 Unknown, 0 Unchecked, 19.1s Time] [2024-11-14 04:32:53,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2024-11-14 04:32:53,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 197. [2024-11-14 04:32:53,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.1683673469387754) internal successors, (229), 196 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:32:53,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 229 transitions. [2024-11-14 04:32:53,136 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 229 transitions. Word has length 43 [2024-11-14 04:32:53,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:32:53,136 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 229 transitions. [2024-11-14 04:32:53,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 2.42) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:32:53,137 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 229 transitions. [2024-11-14 04:32:53,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-14 04:32:53,137 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:32:53,137 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:32:53,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-14 04:32:53,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:32:53,338 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:32:53,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:32:53,338 INFO L85 PathProgramCache]: Analyzing trace with hash 874375090, now seen corresponding path program 9 times [2024-11-14 04:32:53,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:32:53,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402524884] [2024-11-14 04:32:53,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:32:53,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:32:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:32:54,759 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:32:54,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:32:54,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402524884] [2024-11-14 04:32:54,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402524884] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:32:54,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744983852] [2024-11-14 04:32:54,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:32:54,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:32:54,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:32:54,768 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:32:54,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-14 04:32:54,930 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:32:54,930 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:32:54,932 INFO L255 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-14 04:32:54,934 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:32:55,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:32:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 52 proven. 61 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 04:32:55,549 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:32:55,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 04:32:55,599 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 16 treesize of output 12 [2024-11-14 04:32:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 52 proven. 61 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 04:32:55,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744983852] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:32:55,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1075763862] [2024-11-14 04:32:55,726 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:32:55,727 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:32:55,727 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:32:55,727 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:32:55,727 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:32:56,250 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:32:57,814 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13082#(<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|)' at error location [2024-11-14 04:32:57,814 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:32:57,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:32:57,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 41 [2024-11-14 04:32:57,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484857293] [2024-11-14 04:32:57,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:32:57,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-14 04:32:57,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:32:57,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-14 04:32:57,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2615, Unknown=2, NotChecked=0, Total=2756 [2024-11-14 04:32:57,816 INFO L87 Difference]: Start difference. First operand 197 states and 229 transitions. Second operand has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:33:00,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:33:00,133 INFO L93 Difference]: Finished difference Result 350 states and 397 transitions. [2024-11-14 04:33:00,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-14 04:33:00,134 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-11-14 04:33:00,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:33:00,134 INFO L225 Difference]: With dead ends: 350 [2024-11-14 04:33:00,134 INFO L226 Difference]: Without dead ends: 209 [2024-11-14 04:33:00,135 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=334, Invalid=5214, Unknown=2, NotChecked=0, Total=5550 [2024-11-14 04:33:00,135 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 83 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 1225 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:33:00,136 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 535 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1225 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 04:33:00,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2024-11-14 04:33:00,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 205. [2024-11-14 04:33:00,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.161764705882353) internal successors, (237), 204 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:33:00,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 237 transitions. [2024-11-14 04:33:00,141 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 237 transitions. Word has length 52 [2024-11-14 04:33:00,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:33:00,141 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 237 transitions. [2024-11-14 04:33:00,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:33:00,142 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 237 transitions. [2024-11-14 04:33:00,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-14 04:33:00,142 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:33:00,143 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:33:00,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-14 04:33:00,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:33:00,344 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:33:00,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:33:00,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1116295886, now seen corresponding path program 10 times [2024-11-14 04:33:00,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:33:00,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740122384] [2024-11-14 04:33:00,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:33:00,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:33:00,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:33:01,768 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:33:01,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:33:01,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740122384] [2024-11-14 04:33:01,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740122384] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:33:01,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678302500] [2024-11-14 04:33:01,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:33:01,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:33:01,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:33:01,771 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:33:01,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-14 04:33:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:33:01,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-14 04:33:01,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:33:02,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:33:02,794 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 40 proven. 91 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 04:33:02,794 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:33:02,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 04:33:02,844 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 16 treesize of output 12 [2024-11-14 04:33:02,993 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 40 proven. 91 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 04:33:02,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678302500] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:33:02,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1754390656] [2024-11-14 04:33:02,995 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:33:02,995 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:33:02,995 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:33:02,995 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:33:02,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:33:03,522 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:33:05,311 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14055#(<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|)' at error location [2024-11-14 04:33:05,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:33:05,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:33:05,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 44 [2024-11-14 04:33:05,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653011857] [2024-11-14 04:33:05,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:33:05,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-14 04:33:05,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:33:05,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-14 04:33:05,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2940, Unknown=2, NotChecked=0, Total=3080 [2024-11-14 04:33:05,313 INFO L87 Difference]: Start difference. First operand 205 states and 237 transitions. Second operand has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:33:08,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:33:08,937 INFO L93 Difference]: Finished difference Result 383 states and 433 transitions. [2024-11-14 04:33:08,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-14 04:33:08,938 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 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 54 [2024-11-14 04:33:08,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:33:08,939 INFO L225 Difference]: With dead ends: 383 [2024-11-14 04:33:08,939 INFO L226 Difference]: Without dead ends: 217 [2024-11-14 04:33:08,940 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=368, Invalid=6110, Unknown=2, NotChecked=0, Total=6480 [2024-11-14 04:33:08,941 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 118 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:33:08,941 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 733 Invalid, 1599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1581 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 04:33:08,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2024-11-14 04:33:08,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 213. [2024-11-14 04:33:08,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.1556603773584906) internal successors, (245), 212 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:33:08,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 245 transitions. [2024-11-14 04:33:08,949 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 245 transitions. Word has length 54 [2024-11-14 04:33:08,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:33:08,949 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 245 transitions. [2024-11-14 04:33:08,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:33:08,950 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 245 transitions. [2024-11-14 04:33:08,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-14 04:33:08,950 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:33:08,950 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:33:08,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-14 04:33:09,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:33:09,151 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:33:09,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:33:09,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1673946858, now seen corresponding path program 11 times [2024-11-14 04:33:09,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:33:09,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634353937] [2024-11-14 04:33:09,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:33:09,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:33:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:33:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 20 proven. 127 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:33:10,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:33:10,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634353937] [2024-11-14 04:33:10,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634353937] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:33:10,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033479069] [2024-11-14 04:33:10,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:33:10,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:33:10,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:33:10,074 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:33:10,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-14 04:33:10,330 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-14 04:33:10,330 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:33:10,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-11-14 04:33:10,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:33:10,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:33:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 20 proven. 127 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:33:10,804 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:33:10,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 04:33:10,928 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 16 treesize of output 12 [2024-11-14 04:33:11,244 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 20 proven. 127 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:33:11,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033479069] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:33:11,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [814362031] [2024-11-14 04:33:11,246 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:33:11,246 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:33:11,246 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:33:11,246 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:33:11,246 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:33:11,697 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:33:13,357 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15089#(exists ((|v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_262| Int) (|v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_261| Int)) (and (<= 1 |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset|) (<= 0 |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_262|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_261|) |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_262|) (= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|)))' at error location [2024-11-14 04:33:13,357 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:33:13,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:33:13,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 46 [2024-11-14 04:33:13,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161670241] [2024-11-14 04:33:13,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:33:13,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-14 04:33:13,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:33:13,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-14 04:33:13,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=3350, Unknown=0, NotChecked=0, Total=3540 [2024-11-14 04:33:13,359 INFO L87 Difference]: Start difference. First operand 213 states and 245 transitions. Second operand has 46 states, 46 states have (on average 2.391304347826087) internal successors, (110), 46 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:33:14,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:33:14,994 INFO L93 Difference]: Finished difference Result 407 states and 460 transitions. [2024-11-14 04:33:14,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-14 04:33:14,994 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.391304347826087) internal successors, (110), 46 states have internal predecessors, (110), 0 states have call successors, (0), 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 04:33:14,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:33:14,995 INFO L225 Difference]: With dead ends: 407 [2024-11-14 04:33:14,995 INFO L226 Difference]: Without dead ends: 225 [2024-11-14 04:33:14,996 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1649 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=293, Invalid=5407, Unknown=0, NotChecked=0, Total=5700 [2024-11-14 04:33:14,997 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 66 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:33:14,997 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 795 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1546 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 04:33:14,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-11-14 04:33:15,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 221. [2024-11-14 04:33:15,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.15) internal successors, (253), 220 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:33:15,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 253 transitions. [2024-11-14 04:33:15,002 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 253 transitions. Word has length 56 [2024-11-14 04:33:15,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:33:15,002 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 253 transitions. [2024-11-14 04:33:15,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.391304347826087) internal successors, (110), 46 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:33:15,003 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 253 transitions. [2024-11-14 04:33:15,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-14 04:33:15,004 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:33:15,004 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:33:15,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-14 04:33:15,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:33:15,205 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:33:15,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:33:15,205 INFO L85 PathProgramCache]: Analyzing trace with hash 705618950, now seen corresponding path program 12 times [2024-11-14 04:33:15,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:33:15,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884413126] [2024-11-14 04:33:15,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:33:15,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:33:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:33:15,983 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:33:15,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:33:15,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884413126] [2024-11-14 04:33:15,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884413126] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:33:15,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581125186] [2024-11-14 04:33:15,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:33:15,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:33:15,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:33:15,986 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:33:15,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-14 04:33:16,200 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:33:16,201 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:33:16,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-14 04:33:16,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:33:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 56 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:33:16,678 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:33:17,268 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 7 treesize of output 5 [2024-11-14 04:33:17,458 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 56 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:33:17,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581125186] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:33:17,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1042585079] [2024-11-14 04:33:17,459 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:33:17,459 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:33:17,459 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:33:17,459 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:33:17,459 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:33:17,950 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:33:19,515 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16152#(<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|)' at error location [2024-11-14 04:33:19,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:33:19,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:33:19,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 46 [2024-11-14 04:33:19,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044626034] [2024-11-14 04:33:19,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:33:19,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-14 04:33:19,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:33:19,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-14 04:33:19,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=3030, Unknown=2, NotChecked=0, Total=3306 [2024-11-14 04:33:19,518 INFO L87 Difference]: Start difference. First operand 221 states and 253 transitions. Second operand has 47 states, 46 states have (on average 2.630434782608696) internal successors, (121), 47 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:33:20,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:33:20,992 INFO L93 Difference]: Finished difference Result 304 states and 339 transitions. [2024-11-14 04:33:20,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-14 04:33:20,993 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.630434782608696) internal successors, (121), 47 states have internal predecessors, (121), 0 states have call successors, (0), 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 58 [2024-11-14 04:33:20,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:33:20,994 INFO L225 Difference]: With dead ends: 304 [2024-11-14 04:33:20,994 INFO L226 Difference]: Without dead ends: 304 [2024-11-14 04:33:20,995 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 120 SyntacticMatches, 17 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=476, Invalid=5072, Unknown=2, NotChecked=0, Total=5550 [2024-11-14 04:33:20,995 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 199 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:33:20,995 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 565 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1263 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 04:33:20,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2024-11-14 04:33:21,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 237. [2024-11-14 04:33:21,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.152542372881356) internal successors, (272), 236 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:33:21,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 272 transitions. [2024-11-14 04:33:21,003 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 272 transitions. Word has length 58 [2024-11-14 04:33:21,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:33:21,003 INFO L471 AbstractCegarLoop]: Abstraction has 237 states and 272 transitions. [2024-11-14 04:33:21,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.630434782608696) internal successors, (121), 47 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:33:21,003 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 272 transitions. [2024-11-14 04:33:21,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-14 04:33:21,004 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:33:21,004 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:33:21,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-14 04:33:21,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:33:21,208 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:33:21,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:33:21,209 INFO L85 PathProgramCache]: Analyzing trace with hash 32739657, now seen corresponding path program 13 times [2024-11-14 04:33:21,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:33:21,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899066034] [2024-11-14 04:33:21,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:33:21,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:33:21,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:33:22,195 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 23 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:33:22,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:33:22,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899066034] [2024-11-14 04:33:22,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899066034] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:33:22,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320815766] [2024-11-14 04:33:22,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:33:22,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:33:22,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:33:22,197 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:33:22,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-14 04:33:22,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:33:22,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-11-14 04:33:22,384 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:33:22,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:33:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 23 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:33:22,837 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:33:22,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 04:33:22,909 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 16 treesize of output 12 [2024-11-14 04:33:23,025 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 23 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:33:23,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320815766] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:33:23,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1915939395] [2024-11-14 04:33:23,027 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:33:23,027 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:33:23,027 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:33:23,027 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:33:23,027 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:33:23,564 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:33:25,209 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17145#(exists ((|v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_306| Int) (|v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_308| Int)) (and (<= 1 |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_306|) |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_308|) (= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_308|)))' at error location [2024-11-14 04:33:25,209 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:33:25,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:33:25,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 41 [2024-11-14 04:33:25,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047618824] [2024-11-14 04:33:25,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:33:25,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-14 04:33:25,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:33:25,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-14 04:33:25,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2805, Unknown=0, NotChecked=0, Total=2970 [2024-11-14 04:33:25,211 INFO L87 Difference]: Start difference. First operand 237 states and 272 transitions. Second operand has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 41 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 04:33:27,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:33:27,153 INFO L93 Difference]: Finished difference Result 456 states and 515 transitions. [2024-11-14 04:33:27,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-14 04:33:27,153 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 41 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2024-11-14 04:33:27,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:33:27,154 INFO L225 Difference]: With dead ends: 456 [2024-11-14 04:33:27,154 INFO L226 Difference]: Without dead ends: 249 [2024-11-14 04:33:27,155 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=296, Invalid=5404, Unknown=0, NotChecked=0, Total=5700 [2024-11-14 04:33:27,155 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 105 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 1731 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:33:27,155 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 960 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1731 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 04:33:27,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-11-14 04:33:27,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 245. [2024-11-14 04:33:27,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.1475409836065573) internal successors, (280), 244 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:33:27,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 280 transitions. [2024-11-14 04:33:27,160 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 280 transitions. Word has length 62 [2024-11-14 04:33:27,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:33:27,160 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 280 transitions. [2024-11-14 04:33:27,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 41 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 04:33:27,160 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 280 transitions. [2024-11-14 04:33:27,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-14 04:33:27,161 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:33:27,161 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:33:27,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-14 04:33:27,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-14 04:33:27,362 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:33:27,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:33:27,362 INFO L85 PathProgramCache]: Analyzing trace with hash 643352933, now seen corresponding path program 14 times [2024-11-14 04:33:27,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:33:27,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354789262] [2024-11-14 04:33:27,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:33:27,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:33:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:33:28,085 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 56 proven. 153 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:33:28,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:33:28,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354789262] [2024-11-14 04:33:28,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354789262] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:33:28,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8298398] [2024-11-14 04:33:28,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:33:28,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:33:28,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:33:28,088 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:33:28,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-14 04:33:28,327 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-14 04:33:28,327 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:33:28,330 INFO L255 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-14 04:33:28,332 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:33:28,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-14 04:33:43,431 INFO L349 Elim1Store]: treesize reduction 16, result has 89.1 percent of original size [2024-11-14 04:33:43,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 153 [2024-11-14 04:33:44,586 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 48 proven. 131 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-14 04:33:44,586 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:34:45,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 60 [2024-11-14 04:34:45,729 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:34:45,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 106 treesize of output 186 [2024-11-14 04:34:45,746 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 13 treesize of output 9 [2024-11-14 04:34:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 4 proven. 175 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-14 04:34:46,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8298398] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:34:46,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [117595606] [2024-11-14 04:34:46,475 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:34:46,475 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:34:46,475 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:34:46,475 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:34:46,475 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:34:46,863 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:34:49,063 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18360#(and (exists ((|v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_336| Int) (|v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_334| Int)) (and (<= 1 |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset|) (<= 0 |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_336|) (<= (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_334|) |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_336|))) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|))' at error location [2024-11-14 04:34:49,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:34:49,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:34:49,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 28, 28] total 78 [2024-11-14 04:34:49,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232479408] [2024-11-14 04:34:49,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:34:49,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-11-14 04:34:49,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:34:49,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-11-14 04:34:49,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=687, Invalid=8024, Unknown=31, NotChecked=0, Total=8742 [2024-11-14 04:34:49,065 INFO L87 Difference]: Start difference. First operand 245 states and 280 transitions. Second operand has 80 states, 79 states have (on average 2.050632911392405) internal successors, (162), 79 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:35:09,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:35:11,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:35:12,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:35:19,636 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 04:35:42,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:35:42,038 INFO L93 Difference]: Finished difference Result 401 states and 451 transitions. [2024-11-14 04:35:42,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-11-14 04:35:42,038 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 2.050632911392405) internal successors, (162), 79 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2024-11-14 04:35:42,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:35:42,040 INFO L225 Difference]: With dead ends: 401 [2024-11-14 04:35:42,040 INFO L226 Difference]: Without dead ends: 401 [2024-11-14 04:35:42,041 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7497 ImplicationChecksByTransitivity, 117.2s TimeCoverageRelationStatistics Valid=2717, Invalid=24306, Unknown=37, NotChecked=0, Total=27060 [2024-11-14 04:35:42,041 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 351 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 2151 mSolverCounterSat, 44 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 2200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2151 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:35:42,042 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 285 Invalid, 2200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2151 Invalid, 5 Unknown, 0 Unchecked, 12.8s Time] [2024-11-14 04:35:42,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2024-11-14 04:35:42,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 325. [2024-11-14 04:35:42,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.1574074074074074) internal successors, (375), 324 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:35:42,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 375 transitions. [2024-11-14 04:35:42,048 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 375 transitions. Word has length 64 [2024-11-14 04:35:42,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:35:42,048 INFO L471 AbstractCegarLoop]: Abstraction has 325 states and 375 transitions. [2024-11-14 04:35:42,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 2.050632911392405) internal successors, (162), 79 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:35:42,048 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 375 transitions. [2024-11-14 04:35:42,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-14 04:35:42,050 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:35:42,050 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:35:42,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-14 04:35:42,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-14 04:35:42,251 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:35:42,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:35:42,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1588148428, now seen corresponding path program 15 times [2024-11-14 04:35:42,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:35:42,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123362387] [2024-11-14 04:35:42,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:35:42,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:35:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:35:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 0 proven. 419 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:35:44,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:35:44,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123362387] [2024-11-14 04:35:44,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123362387] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:35:44,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593708333] [2024-11-14 04:35:44,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:35:44,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:35:44,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:35:44,352 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:35:44,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-14 04:35:44,707 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:35:44,707 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:35:44,711 INFO L255 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 124 conjuncts are in the unsatisfiable core [2024-11-14 04:35:44,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:35:45,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:35:45,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-14 04:35:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 166 proven. 217 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-14 04:35:45,921 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:35:46,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 04:35:46,056 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 16 treesize of output 12 [2024-11-14 04:35:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 166 proven. 217 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-14 04:35:46,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593708333] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:35:46,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [342384877] [2024-11-14 04:35:46,237 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:35:46,237 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:35:46,238 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:35:46,238 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:35:46,238 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:35:46,665 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:35:50,008 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19800#(<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|)' at error location [2024-11-14 04:35:50,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:35:50,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:35:50,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26, 26] total 60 [2024-11-14 04:35:50,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713218303] [2024-11-14 04:35:50,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:35:50,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-14 04:35:50,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:35:50,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-14 04:35:50,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=4924, Unknown=2, NotChecked=0, Total=5112 [2024-11-14 04:35:50,010 INFO L87 Difference]: Start difference. First operand 325 states and 375 transitions. Second operand has 60 states, 60 states have (on average 2.5833333333333335) internal successors, (155), 60 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:35:54,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:35:54,836 INFO L93 Difference]: Finished difference Result 578 states and 655 transitions. [2024-11-14 04:35:54,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-14 04:35:54,837 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.5833333333333335) internal successors, (155), 60 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2024-11-14 04:35:54,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:35:54,839 INFO L225 Difference]: With dead ends: 578 [2024-11-14 04:35:54,839 INFO L226 Difference]: Without dead ends: 337 [2024-11-14 04:35:54,839 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 197 SyntacticMatches, 14 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2387 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=534, Invalid=10594, Unknown=2, NotChecked=0, Total=11130 [2024-11-14 04:35:54,840 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 146 mSDsluCounter, 1654 mSDsCounter, 0 mSdLazyCounter, 3218 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1690 SdHoareTripleChecker+Invalid, 3245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 3218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:35:54,840 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 1690 Invalid, 3245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 3218 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-14 04:35:54,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2024-11-14 04:35:54,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 333. [2024-11-14 04:35:54,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.1536144578313252) internal successors, (383), 332 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:35:54,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 383 transitions. [2024-11-14 04:35:54,845 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 383 transitions. Word has length 84 [2024-11-14 04:35:54,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:35:54,845 INFO L471 AbstractCegarLoop]: Abstraction has 333 states and 383 transitions. [2024-11-14 04:35:54,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.5833333333333335) internal successors, (155), 60 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:35:54,845 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 383 transitions. [2024-11-14 04:35:54,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-14 04:35:54,846 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:35:54,846 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:35:54,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-14 04:35:55,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-14 04:35:55,050 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:35:55,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:35:55,051 INFO L85 PathProgramCache]: Analyzing trace with hash 854508112, now seen corresponding path program 16 times [2024-11-14 04:35:55,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:35:55,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530821323] [2024-11-14 04:35:55,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:35:55,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:35:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:35:57,170 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 438 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:35:57,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:35:57,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530821323] [2024-11-14 04:35:57,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530821323] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:35:57,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069893044] [2024-11-14 04:35:57,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:35:57,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:35:57,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:35:57,173 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:35:57,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-14 04:35:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:35:57,372 INFO L255 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 114 conjuncts are in the unsatisfiable core [2024-11-14 04:35:57,375 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:35:57,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:35:58,842 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 146 proven. 271 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 04:35:58,842 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:35:58,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 04:35:58,923 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 16 treesize of output 12 [2024-11-14 04:35:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 146 proven. 271 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 04:35:59,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069893044] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:35:59,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [498349390] [2024-11-14 04:35:59,111 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:35:59,111 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:35:59,111 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:35:59,111 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:35:59,111 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:35:59,619 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:36:02,024 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21363#(exists ((|v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_403| Int) (|v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_401| Int)) (and (<= 1 |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_403|) (= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_401|) |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_403|)))' at error location [2024-11-14 04:36:02,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:36:02,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:36:02,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28, 28] total 62 [2024-11-14 04:36:02,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379948148] [2024-11-14 04:36:02,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:36:02,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-14 04:36:02,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:36:02,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-14 04:36:02,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=5513, Unknown=0, NotChecked=0, Total=5700 [2024-11-14 04:36:02,025 INFO L87 Difference]: Start difference. First operand 333 states and 383 transitions. Second operand has 62 states, 62 states have (on average 2.596774193548387) internal successors, (161), 62 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:36:07,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:36:07,183 INFO L93 Difference]: Finished difference Result 611 states and 691 transitions. [2024-11-14 04:36:07,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-14 04:36:07,184 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.596774193548387) internal successors, (161), 62 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2024-11-14 04:36:07,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:36:07,185 INFO L225 Difference]: With dead ends: 611 [2024-11-14 04:36:07,185 INFO L226 Difference]: Without dead ends: 345 [2024-11-14 04:36:07,186 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2280 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=558, Invalid=12098, Unknown=0, NotChecked=0, Total=12656 [2024-11-14 04:36:07,186 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 163 mSDsluCounter, 1767 mSDsCounter, 0 mSdLazyCounter, 3479 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1807 SdHoareTripleChecker+Invalid, 3508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 3479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:36:07,187 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 1807 Invalid, 3508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 3479 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-14 04:36:07,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2024-11-14 04:36:07,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 341. [2024-11-14 04:36:07,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.15) internal successors, (391), 340 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:36:07,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 391 transitions. [2024-11-14 04:36:07,192 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 391 transitions. Word has length 86 [2024-11-14 04:36:07,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:36:07,192 INFO L471 AbstractCegarLoop]: Abstraction has 341 states and 391 transitions. [2024-11-14 04:36:07,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.596774193548387) internal successors, (161), 62 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:36:07,193 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 391 transitions. [2024-11-14 04:36:07,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-14 04:36:07,194 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:36:07,194 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:36:07,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-14 04:36:07,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-14 04:36:07,395 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:36:07,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:36:07,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1099667860, now seen corresponding path program 17 times [2024-11-14 04:36:07,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:36:07,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524948227] [2024-11-14 04:36:07,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:36:07,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:36:07,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:36:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:36:09,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:36:09,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524948227] [2024-11-14 04:36:09,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524948227] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:36:09,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294672075] [2024-11-14 04:36:09,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:36:09,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:36:09,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:36:09,926 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:36:09,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-14 04:36:10,532 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-11-14 04:36:10,532 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:36:10,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 130 conjuncts are in the unsatisfiable core [2024-11-14 04:36:10,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:36:11,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:36:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 118 proven. 331 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 04:36:12,595 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:36:13,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 04:36:13,702 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 16 treesize of output 12 [2024-11-14 04:36:14,885 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 118 proven. 331 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 04:36:14,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294672075] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:36:14,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1163690774] [2024-11-14 04:36:14,886 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:36:14,886 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:36:14,887 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:36:14,887 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:36:14,887 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:36:15,338 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:36:17,589 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23016#(<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|)' at error location [2024-11-14 04:36:17,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:36:17,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:36:17,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 30, 30] total 91 [2024-11-14 04:36:17,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489313131] [2024-11-14 04:36:17,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:36:17,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2024-11-14 04:36:17,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:36:17,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2024-11-14 04:36:17,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=10196, Unknown=2, NotChecked=0, Total=10506 [2024-11-14 04:36:17,590 INFO L87 Difference]: Start difference. First operand 341 states and 391 transitions. Second operand has 91 states, 91 states have (on average 2.6373626373626373) internal successors, (240), 91 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:36:26,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:36:26,455 INFO L93 Difference]: Finished difference Result 644 states and 727 transitions. [2024-11-14 04:36:26,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-14 04:36:26,456 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.6373626373626373) internal successors, (240), 91 states have internal predecessors, (240), 0 states have call successors, (0), 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 88 [2024-11-14 04:36:26,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:36:26,457 INFO L225 Difference]: With dead ends: 644 [2024-11-14 04:36:26,457 INFO L226 Difference]: Without dead ends: 353 [2024-11-14 04:36:26,458 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3283 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=818, Invalid=19486, Unknown=2, NotChecked=0, Total=20306 [2024-11-14 04:36:26,458 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 231 mSDsluCounter, 2463 mSDsCounter, 0 mSdLazyCounter, 4801 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 2507 SdHoareTripleChecker+Invalid, 4833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 4801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:36:26,458 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 2507 Invalid, 4833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 4801 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-14 04:36:26,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2024-11-14 04:36:26,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 349. [2024-11-14 04:36:26,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.146551724137931) internal successors, (399), 348 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:36:26,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 399 transitions. [2024-11-14 04:36:26,463 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 399 transitions. Word has length 88 [2024-11-14 04:36:26,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:36:26,464 INFO L471 AbstractCegarLoop]: Abstraction has 349 states and 399 transitions. [2024-11-14 04:36:26,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.6373626373626373) internal successors, (240), 91 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:36:26,464 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 399 transitions. [2024-11-14 04:36:26,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-14 04:36:26,465 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:36:26,465 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:36:26,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-14 04:36:26,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-14 04:36:26,666 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:36:26,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:36:26,666 INFO L85 PathProgramCache]: Analyzing trace with hash 2132898696, now seen corresponding path program 18 times [2024-11-14 04:36:26,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:36:26,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017201618] [2024-11-14 04:36:26,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:36:26,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:36:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:36:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 482 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:36:28,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:36:28,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017201618] [2024-11-14 04:36:28,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017201618] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:36:28,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126767637] [2024-11-14 04:36:28,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:36:28,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:36:28,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:36:28,945 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:36:28,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-14 04:36:29,349 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:36:29,349 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:36:29,353 INFO L255 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 134 conjuncts are in the unsatisfiable core [2024-11-14 04:36:29,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:36:30,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:36:31,315 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 82 proven. 397 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 04:36:31,315 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:36:32,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 04:36:32,353 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 16 treesize of output 12 [2024-11-14 04:36:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 82 proven. 397 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 04:36:33,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126767637] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:36:33,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [68245321] [2024-11-14 04:36:33,472 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:36:33,472 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:36:33,472 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:36:33,472 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:36:33,472 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:36:34,064 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:36:36,944 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24731#(<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|)' at error location [2024-11-14 04:36:36,945 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:36:36,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:36:36,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32, 32] total 96 [2024-11-14 04:36:36,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110984364] [2024-11-14 04:36:36,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:36:36,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-11-14 04:36:36,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:36:36,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-11-14 04:36:36,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=11447, Unknown=0, NotChecked=0, Total=11772 [2024-11-14 04:36:36,947 INFO L87 Difference]: Start difference. First operand 349 states and 399 transitions. Second operand has 96 states, 96 states have (on average 2.6458333333333335) internal successors, (254), 96 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:36:44,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:36:44,722 INFO L93 Difference]: Finished difference Result 677 states and 763 transitions. [2024-11-14 04:36:44,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-14 04:36:44,723 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.6458333333333335) internal successors, (254), 96 states have internal predecessors, (254), 0 states have call successors, (0), 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 90 [2024-11-14 04:36:44,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:36:44,724 INFO L225 Difference]: With dead ends: 677 [2024-11-14 04:36:44,724 INFO L226 Difference]: Without dead ends: 361 [2024-11-14 04:36:44,725 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5340 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=865, Invalid=22087, Unknown=0, NotChecked=0, Total=22952 [2024-11-14 04:36:44,725 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 276 mSDsluCounter, 2537 mSDsCounter, 0 mSdLazyCounter, 4994 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 2585 SdHoareTripleChecker+Invalid, 5028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 4994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:36:44,725 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 2585 Invalid, 5028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 4994 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-14 04:36:44,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2024-11-14 04:36:44,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 357. [2024-11-14 04:36:44,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 1.1432584269662922) internal successors, (407), 356 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:36:44,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 407 transitions. [2024-11-14 04:36:44,731 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 407 transitions. Word has length 90 [2024-11-14 04:36:44,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:36:44,731 INFO L471 AbstractCegarLoop]: Abstraction has 357 states and 407 transitions. [2024-11-14 04:36:44,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.6458333333333335) internal successors, (254), 96 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:36:44,731 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 407 transitions. [2024-11-14 04:36:44,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-14 04:36:44,732 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:36:44,732 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:36:44,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-14 04:36:44,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-14 04:36:44,933 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:36:44,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:36:44,933 INFO L85 PathProgramCache]: Analyzing trace with hash -926963292, now seen corresponding path program 19 times [2024-11-14 04:36:44,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:36:44,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395045799] [2024-11-14 04:36:44,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:36:44,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:36:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:36:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 38 proven. 469 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:36:46,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:36:46,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395045799] [2024-11-14 04:36:46,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395045799] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:36:46,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891797120] [2024-11-14 04:36:46,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:36:46,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:36:46,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:36:46,323 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:36:46,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-14 04:36:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:36:46,573 INFO L255 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 144 conjuncts are in the unsatisfiable core [2024-11-14 04:36:46,575 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:36:47,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:36:47,293 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 38 proven. 469 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:36:47,293 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:36:47,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 04:36:47,388 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 16 treesize of output 12 [2024-11-14 04:36:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 38 proven. 469 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:36:47,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891797120] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:36:47,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [788542042] [2024-11-14 04:36:47,542 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:36:47,542 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:36:47,542 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:36:47,542 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:36:47,542 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:36:48,302 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:36:50,697 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26466#(<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|)' at error location [2024-11-14 04:36:50,697 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:36:50,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:36:50,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 56 [2024-11-14 04:36:50,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651496337] [2024-11-14 04:36:50,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:36:50,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-14 04:36:50,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:36:50,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-14 04:36:50,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=4487, Unknown=0, NotChecked=0, Total=4692 [2024-11-14 04:36:50,698 INFO L87 Difference]: Start difference. First operand 357 states and 407 transitions. Second operand has 56 states, 56 states have (on average 2.3392857142857144) internal successors, (131), 56 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:36:53,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:36:53,799 INFO L93 Difference]: Finished difference Result 701 states and 790 transitions. [2024-11-14 04:36:53,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-14 04:36:53,799 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.3392857142857144) internal successors, (131), 56 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2024-11-14 04:36:53,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:36:53,800 INFO L225 Difference]: With dead ends: 701 [2024-11-14 04:36:53,800 INFO L226 Difference]: Without dead ends: 369 [2024-11-14 04:36:53,801 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=396, Invalid=9504, Unknown=0, NotChecked=0, Total=9900 [2024-11-14 04:36:53,801 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 170 mSDsluCounter, 2046 mSDsCounter, 0 mSdLazyCounter, 3675 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 2098 SdHoareTripleChecker+Invalid, 3688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 3675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:36:53,801 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 2098 Invalid, 3688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 3675 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-14 04:36:53,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2024-11-14 04:36:53,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 365. [2024-11-14 04:36:53,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.14010989010989) internal successors, (415), 364 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:36:53,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 415 transitions. [2024-11-14 04:36:53,807 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 415 transitions. Word has length 92 [2024-11-14 04:36:53,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:36:53,807 INFO L471 AbstractCegarLoop]: Abstraction has 365 states and 415 transitions. [2024-11-14 04:36:53,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.3392857142857144) internal successors, (131), 56 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:36:53,807 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 415 transitions. [2024-11-14 04:36:53,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-14 04:36:53,808 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:36:53,808 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:36:53,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-14 04:36:54,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-14 04:36:54,009 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:36:54,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:36:54,009 INFO L85 PathProgramCache]: Analyzing trace with hash 598264000, now seen corresponding path program 20 times [2024-11-14 04:36:54,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:36:54,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715206196] [2024-11-14 04:36:54,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:36:54,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:36:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:36:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 156 proven. 378 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:36:55,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:36:55,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715206196] [2024-11-14 04:36:55,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715206196] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:36:55,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141998907] [2024-11-14 04:36:55,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:36:55,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:36:55,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:36:55,582 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:36:55,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-14 04:36:56,220 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-11-14 04:36:56,220 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:36:56,225 INFO L255 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 163 conjuncts are in the unsatisfiable core [2024-11-14 04:36:56,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:36:56,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-14 04:36:56,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:37:03,504 INFO L349 Elim1Store]: treesize reduction 24, result has 88.5 percent of original size [2024-11-14 04:37:03,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 73 treesize of output 215 [2024-11-14 04:37:03,813 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-14 04:37:03,834 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-14 04:37:04,391 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 18 proven. 474 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-14 04:37:04,391 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:37:44,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 88 [2024-11-14 04:37:44,485 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:37:44,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 154 treesize of output 278 [2024-11-14 04:37:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 36 proven. 497 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:37:47,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141998907] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:37:47,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1716396779] [2024-11-14 04:37:47,409 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:37:47,409 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:37:47,409 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:37:47,409 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:37:47,409 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:37:47,846 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:37:51,368 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28287#(exists ((|v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_545| Int) (|v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_543| Int)) (and (<= 1 |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset|) (<= 0 |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_545|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_543|) |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_545|) (= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|)))' at error location [2024-11-14 04:37:51,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:37:51,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:37:51,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 41, 47] total 121 [2024-11-14 04:37:51,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875669628] [2024-11-14 04:37:51,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:37:51,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2024-11-14 04:37:51,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:37:51,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2024-11-14 04:37:51,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1428, Invalid=16920, Unknown=12, NotChecked=0, Total=18360 [2024-11-14 04:37:51,371 INFO L87 Difference]: Start difference. First operand 365 states and 415 transitions. Second operand has 122 states, 121 states have (on average 2.190082644628099) internal successors, (265), 122 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:38:01,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:38:37,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:38:37,426 INFO L93 Difference]: Finished difference Result 598 states and 669 transitions. [2024-11-14 04:38:37,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2024-11-14 04:38:37,427 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 121 states have (on average 2.190082644628099) internal successors, (265), 122 states have internal predecessors, (265), 0 states have call successors, (0), 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 94 [2024-11-14 04:38:37,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:38:37,428 INFO L225 Difference]: With dead ends: 598 [2024-11-14 04:38:37,428 INFO L226 Difference]: Without dead ends: 598 [2024-11-14 04:38:37,430 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16643 ImplicationChecksByTransitivity, 86.3s TimeCoverageRelationStatistics Valid=5780, Invalid=55461, Unknown=15, NotChecked=0, Total=61256 [2024-11-14 04:38:37,430 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 462 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 6000 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 6027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 6000 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:38:37,430 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 741 Invalid, 6027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 6000 Invalid, 1 Unknown, 0 Unchecked, 10.3s Time] [2024-11-14 04:38:37,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2024-11-14 04:38:37,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 477. [2024-11-14 04:38:37,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.1512605042016806) internal successors, (548), 476 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:38:37,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 548 transitions. [2024-11-14 04:38:37,439 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 548 transitions. Word has length 94 [2024-11-14 04:38:37,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:38:37,439 INFO L471 AbstractCegarLoop]: Abstraction has 477 states and 548 transitions. [2024-11-14 04:38:37,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 121 states have (on average 2.190082644628099) internal successors, (265), 122 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:38:37,440 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 548 transitions. [2024-11-14 04:38:37,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-11-14 04:38:37,441 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:38:37,441 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:38:37,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-14 04:38:37,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-14 04:38:37,642 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:38:37,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:38:37,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1455656171, now seen corresponding path program 21 times [2024-11-14 04:38:37,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:38:37,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491771472] [2024-11-14 04:38:37,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:38:37,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:38:37,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:38:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1000 backedges. 0 proven. 996 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:38:41,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:38:41,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491771472] [2024-11-14 04:38:41,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491771472] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:38:41,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649473430] [2024-11-14 04:38:41,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:38:41,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:38:41,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:38:41,313 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:38:41,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-14 04:38:41,858 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:38:41,858 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:38:41,862 INFO L255 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 152 conjuncts are in the unsatisfiable core [2024-11-14 04:38:41,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:38:43,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:38:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1000 backedges. 371 proven. 547 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2024-11-14 04:38:44,715 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:38:44,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 04:38:44,812 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 16 treesize of output 12 [2024-11-14 04:38:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1000 backedges. 371 proven. 547 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2024-11-14 04:38:45,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649473430] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:38:45,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1075549250] [2024-11-14 04:38:45,073 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:38:45,073 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:38:45,073 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:38:45,073 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:38:45,073 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:38:45,498 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:38:48,088 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30407#(<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|)' at error location [2024-11-14 04:38:48,088 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:38:48,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:38:48,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 36, 36] total 81 [2024-11-14 04:38:48,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404625398] [2024-11-14 04:38:48,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:38:48,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-11-14 04:38:48,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:38:48,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-11-14 04:38:48,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=8334, Unknown=2, NotChecked=0, Total=8556 [2024-11-14 04:38:48,090 INFO L87 Difference]: Start difference. First operand 477 states and 548 transitions. Second operand has 81 states, 81 states have (on average 2.728395061728395) internal successors, (221), 81 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:39:00,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:39:00,115 INFO L93 Difference]: Finished difference Result 855 states and 968 transitions. [2024-11-14 04:39:00,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-14 04:39:00,116 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.728395061728395) internal successors, (221), 81 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2024-11-14 04:39:00,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:39:00,117 INFO L225 Difference]: With dead ends: 855 [2024-11-14 04:39:00,117 INFO L226 Difference]: Without dead ends: 489 [2024-11-14 04:39:00,118 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2022 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=802, Invalid=19218, Unknown=2, NotChecked=0, Total=20022 [2024-11-14 04:39:00,118 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 269 mSDsluCounter, 3790 mSDsCounter, 0 mSdLazyCounter, 6706 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 3846 SdHoareTripleChecker+Invalid, 6748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 6706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:39:00,118 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 3846 Invalid, 6748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 6706 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2024-11-14 04:39:00,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2024-11-14 04:39:00,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 485. [2024-11-14 04:39:00,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 1.1487603305785123) internal successors, (556), 484 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:39:00,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 556 transitions. [2024-11-14 04:39:00,124 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 556 transitions. Word has length 122 [2024-11-14 04:39:00,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:39:00,125 INFO L471 AbstractCegarLoop]: Abstraction has 485 states and 556 transitions. [2024-11-14 04:39:00,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.728395061728395) internal successors, (221), 81 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:39:00,125 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 556 transitions. [2024-11-14 04:39:00,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 04:39:00,126 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:39:00,126 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 15, 15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:39:00,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-14 04:39:00,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-14 04:39:00,327 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:39:00,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:39:00,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1075525937, now seen corresponding path program 22 times [2024-11-14 04:39:00,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:39:00,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388982804] [2024-11-14 04:39:00,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:39:00,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:39:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:39:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 0 proven. 1025 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:39:04,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:39:04,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388982804] [2024-11-14 04:39:04,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388982804] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:39:04,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862893816] [2024-11-14 04:39:04,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:39:04,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:39:04,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:39:04,186 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:39:04,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-14 04:39:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:39:04,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 164 conjuncts are in the unsatisfiable core [2024-11-14 04:39:04,436 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:39:05,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:39:07,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 339 proven. 631 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-11-14 04:39:07,601 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:39:07,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 04:39:07,717 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 16 treesize of output 12 [2024-11-14 04:39:07,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 339 proven. 631 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-11-14 04:39:07,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862893816] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:39:07,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [806817010] [2024-11-14 04:39:08,000 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:39:08,000 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:39:08,001 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:39:08,001 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:39:08,001 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:39:08,422 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:39:11,322 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32679#(<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|)' at error location [2024-11-14 04:39:11,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:39:11,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:39:11,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 38, 38] total 84 [2024-11-14 04:39:11,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815128240] [2024-11-14 04:39:11,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:39:11,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-11-14 04:39:11,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:39:11,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-11-14 04:39:11,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=8891, Unknown=2, NotChecked=0, Total=9120 [2024-11-14 04:39:11,323 INFO L87 Difference]: Start difference. First operand 485 states and 556 transitions. Second operand has 84 states, 84 states have (on average 2.7261904761904763) internal successors, (229), 84 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:39:25,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:39:25,814 INFO L93 Difference]: Finished difference Result 888 states and 1004 transitions. [2024-11-14 04:39:25,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-14 04:39:25,814 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.7261904761904763) internal successors, (229), 84 states have internal predecessors, (229), 0 states have call successors, (0), 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 124 [2024-11-14 04:39:25,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:39:25,815 INFO L225 Difference]: With dead ends: 888 [2024-11-14 04:39:25,816 INFO L226 Difference]: Without dead ends: 497 [2024-11-14 04:39:25,816 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2209 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=862, Invalid=20892, Unknown=2, NotChecked=0, Total=21756 [2024-11-14 04:39:25,817 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 288 mSDsluCounter, 4299 mSDsCounter, 0 mSdLazyCounter, 7469 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 4359 SdHoareTripleChecker+Invalid, 7513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 7469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:39:25,817 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 4359 Invalid, 7513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 7469 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2024-11-14 04:39:25,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2024-11-14 04:39:25,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 493. [2024-11-14 04:39:25,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 1.146341463414634) internal successors, (564), 492 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:39:25,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 564 transitions. [2024-11-14 04:39:25,821 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 564 transitions. Word has length 124 [2024-11-14 04:39:25,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:39:25,822 INFO L471 AbstractCegarLoop]: Abstraction has 493 states and 564 transitions. [2024-11-14 04:39:25,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.7261904761904763) internal successors, (229), 84 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:39:25,822 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 564 transitions. [2024-11-14 04:39:25,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-11-14 04:39:25,823 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:39:25,823 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 16, 16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:39:25,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-14 04:39:26,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-14 04:39:26,024 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:39:26,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:39:26,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1704925107, now seen corresponding path program 23 times [2024-11-14 04:39:26,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:39:26,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528095893] [2024-11-14 04:39:26,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:39:26,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:39:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:39:29,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:39:29,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:39:29,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528095893] [2024-11-14 04:39:29,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528095893] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:39:29,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874531133] [2024-11-14 04:39:29,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:39:29,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:39:29,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:39:29,962 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:39:29,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-14 04:39:31,178 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2024-11-14 04:39:31,178 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:39:31,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 176 conjuncts are in the unsatisfiable core [2024-11-14 04:39:31,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:39:32,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:39:34,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 299 proven. 721 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-14 04:39:34,873 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:39:37,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 04:39:37,270 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 16 treesize of output 12 [2024-11-14 04:39:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 299 proven. 721 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-14 04:39:39,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874531133] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:39:39,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [255053228] [2024-11-14 04:39:39,668 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:39:39,668 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:39:39,668 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:39:39,669 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:39:39,669 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:39:40,137 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:39:44,045 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35049#(<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|)' at error location [2024-11-14 04:39:44,045 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:39:44,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:39:44,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 40, 40] total 123 [2024-11-14 04:39:44,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765936] [2024-11-14 04:39:44,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:39:44,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2024-11-14 04:39:44,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:39:44,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2024-11-14 04:39:44,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=17686, Unknown=2, NotChecked=0, Total=18090 [2024-11-14 04:39:44,048 INFO L87 Difference]: Start difference. First operand 493 states and 564 transitions. Second operand has 123 states, 123 states have (on average 2.747967479674797) internal successors, (338), 123 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:40:06,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:40:06,329 INFO L93 Difference]: Finished difference Result 921 states and 1040 transitions. [2024-11-14 04:40:06,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-14 04:40:06,330 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.747967479674797) internal successors, (338), 123 states have internal predecessors, (338), 0 states have call successors, (0), 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 126 [2024-11-14 04:40:06,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:40:06,332 INFO L225 Difference]: With dead ends: 921 [2024-11-14 04:40:06,332 INFO L226 Difference]: Without dead ends: 505 [2024-11-14 04:40:06,333 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5419 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=1197, Invalid=34711, Unknown=2, NotChecked=0, Total=35910 [2024-11-14 04:40:06,334 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 334 mSDsluCounter, 5108 mSDsCounter, 0 mSdLazyCounter, 9434 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 5172 SdHoareTripleChecker+Invalid, 9481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 9434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:40:06,334 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 5172 Invalid, 9481 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [47 Valid, 9434 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2024-11-14 04:40:06,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2024-11-14 04:40:06,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 501. [2024-11-14 04:40:06,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.144) internal successors, (572), 500 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:40:06,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 572 transitions. [2024-11-14 04:40:06,341 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 572 transitions. Word has length 126 [2024-11-14 04:40:06,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:40:06,341 INFO L471 AbstractCegarLoop]: Abstraction has 501 states and 572 transitions. [2024-11-14 04:40:06,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.747967479674797) internal successors, (338), 123 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:40:06,342 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 572 transitions. [2024-11-14 04:40:06,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-14 04:40:06,343 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:40:06,343 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 17, 17, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:40:06,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-14 04:40:06,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-14 04:40:06,544 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:40:06,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:40:06,544 INFO L85 PathProgramCache]: Analyzing trace with hash 2046247017, now seen corresponding path program 24 times [2024-11-14 04:40:06,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:40:06,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961091057] [2024-11-14 04:40:06,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:06,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:40:06,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:40:11,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:40:11,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961091057] [2024-11-14 04:40:11,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961091057] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:40:11,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101964119] [2024-11-14 04:40:11,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:40:11,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:40:11,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:40:11,617 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:40:11,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-14 04:40:12,515 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:40:12,515 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:40:12,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 202 conjuncts are in the unsatisfiable core [2024-11-14 04:40:12,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:40:14,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:40:16,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-14 04:40:17,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 251 proven. 817 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 04:40:17,004 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:40:17,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 04:40:17,282 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 16 treesize of output 12 [2024-11-14 04:40:17,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 251 proven. 817 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 04:40:17,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101964119] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:40:17,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [747570191] [2024-11-14 04:40:17,651 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:40:17,651 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:40:17,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:40:17,652 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:40:17,652 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:40:18,098 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:40:22,124 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37446#(<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|)' at error location [2024-11-14 04:40:22,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:40:22,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:40:22,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 42, 42] total 91 [2024-11-14 04:40:22,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247610596] [2024-11-14 04:40:22,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:40:22,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2024-11-14 04:40:22,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:40:22,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2024-11-14 04:40:22,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=10260, Unknown=2, NotChecked=0, Total=10506 [2024-11-14 04:40:22,126 INFO L87 Difference]: Start difference. First operand 501 states and 572 transitions. Second operand has 91 states, 91 states have (on average 2.7142857142857144) internal successors, (247), 91 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:40:41,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:40:41,924 INFO L93 Difference]: Finished difference Result 954 states and 1076 transitions. [2024-11-14 04:40:41,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-14 04:40:41,924 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.7142857142857144) internal successors, (247), 91 states have internal predecessors, (247), 0 states have call successors, (0), 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 128 [2024-11-14 04:40:41,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:40:41,925 INFO L225 Difference]: With dead ends: 954 [2024-11-14 04:40:41,925 INFO L226 Difference]: Without dead ends: 513 [2024-11-14 04:40:41,927 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2631 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=992, Invalid=24766, Unknown=2, NotChecked=0, Total=25760 [2024-11-14 04:40:41,927 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 326 mSDsluCounter, 5346 mSDsCounter, 0 mSdLazyCounter, 9108 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 5414 SdHoareTripleChecker+Invalid, 9158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 9108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:40:41,927 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 5414 Invalid, 9158 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [50 Valid, 9108 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2024-11-14 04:40:41,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2024-11-14 04:40:41,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 509. [2024-11-14 04:40:41,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 1.141732283464567) internal successors, (580), 508 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:40:41,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 580 transitions. [2024-11-14 04:40:41,932 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 580 transitions. Word has length 128 [2024-11-14 04:40:41,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:40:41,933 INFO L471 AbstractCegarLoop]: Abstraction has 509 states and 580 transitions. [2024-11-14 04:40:41,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.7142857142857144) internal successors, (247), 91 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:40:41,933 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 580 transitions. [2024-11-14 04:40:41,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-14 04:40:41,934 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:40:41,934 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 18, 18, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:40:41,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-14 04:40:42,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-14 04:40:42,135 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:40:42,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:40:42,135 INFO L85 PathProgramCache]: Analyzing trace with hash -849870459, now seen corresponding path program 25 times [2024-11-14 04:40:42,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:40:42,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883890904] [2024-11-14 04:40:42,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:40:42,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:40:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1124 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:40:47,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:40:47,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883890904] [2024-11-14 04:40:47,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883890904] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:40:47,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845677079] [2024-11-14 04:40:47,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:40:47,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:40:47,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:40:47,222 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:40:47,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-14 04:40:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:40:47,556 INFO L255 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 198 conjuncts are in the unsatisfiable core [2024-11-14 04:40:47,561 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:40:49,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:40:52,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-14 04:40:52,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 195 proven. 919 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 04:40:52,908 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:40:53,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 04:40:53,218 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 16 treesize of output 12 [2024-11-14 04:40:53,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 195 proven. 919 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 04:40:53,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845677079] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:40:53,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [971784990] [2024-11-14 04:40:53,590 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:40:53,590 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:40:53,590 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:40:53,590 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:40:53,590 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:40:54,058 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:40:58,320 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39905#(and (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_783| Int) (|v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_785| Int)) (and (<= 1 |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset|) (<= (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_783|) |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_785|) (<= 0 |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_785|))) (= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|))' at error location [2024-11-14 04:40:58,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:40:58,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:40:58,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 44, 44] total 94 [2024-11-14 04:40:58,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678371233] [2024-11-14 04:40:58,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:40:58,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2024-11-14 04:40:58,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:40:58,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2024-11-14 04:40:58,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=11317, Unknown=0, NotChecked=0, Total=11556 [2024-11-14 04:40:58,322 INFO L87 Difference]: Start difference. First operand 509 states and 580 transitions. Second operand has 94 states, 94 states have (on average 2.7127659574468086) internal successors, (255), 94 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:41:22,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:41:22,893 INFO L93 Difference]: Finished difference Result 987 states and 1112 transitions. [2024-11-14 04:41:22,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-11-14 04:41:22,893 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.7127659574468086) internal successors, (255), 94 states have internal predecessors, (255), 0 states have call successors, (0), 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 04:41:22,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:41:22,895 INFO L225 Difference]: With dead ends: 987 [2024-11-14 04:41:22,895 INFO L226 Difference]: Without dead ends: 521 [2024-11-14 04:41:22,896 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2899 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=1011, Invalid=27381, Unknown=0, NotChecked=0, Total=28392 [2024-11-14 04:41:22,896 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 346 mSDsluCounter, 5770 mSDsCounter, 0 mSdLazyCounter, 9866 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 5842 SdHoareTripleChecker+Invalid, 9919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 9866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:41:22,896 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 5842 Invalid, 9919 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [53 Valid, 9866 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2024-11-14 04:41:22,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2024-11-14 04:41:22,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 517. [2024-11-14 04:41:22,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.1395348837209303) internal successors, (588), 516 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:41:22,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 588 transitions. [2024-11-14 04:41:22,902 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 588 transitions. Word has length 130 [2024-11-14 04:41:22,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:41:22,903 INFO L471 AbstractCegarLoop]: Abstraction has 517 states and 588 transitions. [2024-11-14 04:41:22,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.7127659574468086) internal successors, (255), 94 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:41:22,903 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 588 transitions. [2024-11-14 04:41:22,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-11-14 04:41:22,905 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:41:22,905 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 19, 19, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:41:22,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-14 04:41:23,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-14 04:41:23,106 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:41:23,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:41:23,106 INFO L85 PathProgramCache]: Analyzing trace with hash -879957087, now seen corresponding path program 26 times [2024-11-14 04:41:23,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:41:23,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012999499] [2024-11-14 04:41:23,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:41:23,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:41:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:41:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 1161 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:41:27,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:41:27,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012999499] [2024-11-14 04:41:27,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012999499] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:41:27,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924554165] [2024-11-14 04:41:27,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:41:27,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:41:27,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:41:27,927 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:41:27,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-14 04:41:31,971 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2024-11-14 04:41:31,971 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:41:31,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 206 conjuncts are in the unsatisfiable core [2024-11-14 04:41:31,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:41:34,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:41:36,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 131 proven. 1027 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 04:41:36,554 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:41:38,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 04:41:38,852 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 16 treesize of output 12 [2024-11-14 04:41:41,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 131 proven. 1027 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 04:41:41,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924554165] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:41:41,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [857767125] [2024-11-14 04:41:41,333 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:41:41,333 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:41:41,333 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:41:41,333 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:41:41,333 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:41:41,775 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:41:45,268 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '42469#(<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|)' at error location [2024-11-14 04:41:45,268 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:41:45,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:41:45,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 46, 46] total 138 [2024-11-14 04:41:45,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186859776] [2024-11-14 04:41:45,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:41:45,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2024-11-14 04:41:45,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:41:45,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2024-11-14 04:41:45,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=21876, Unknown=2, NotChecked=0, Total=22350 [2024-11-14 04:41:45,271 INFO L87 Difference]: Start difference. First operand 517 states and 588 transitions. Second operand has 138 states, 138 states have (on average 2.753623188405797) internal successors, (380), 138 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:04,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:42:04,431 INFO L93 Difference]: Finished difference Result 1020 states and 1148 transitions. [2024-11-14 04:42:04,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-11-14 04:42:04,431 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.753623188405797) internal successors, (380), 138 states have internal predecessors, (380), 0 states have call successors, (0), 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 132 [2024-11-14 04:42:04,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:42:04,433 INFO L225 Difference]: With dead ends: 1020 [2024-11-14 04:42:04,433 INFO L226 Difference]: Without dead ends: 529 [2024-11-14 04:42:04,435 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10074 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=1462, Invalid=44118, Unknown=2, NotChecked=0, Total=45582 [2024-11-14 04:42:04,436 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 332 mSDsluCounter, 6324 mSDsCounter, 0 mSdLazyCounter, 11553 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 6400 SdHoareTripleChecker+Invalid, 11609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 11553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:42:04,436 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 6400 Invalid, 11609 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [56 Valid, 11553 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2024-11-14 04:42:04,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2024-11-14 04:42:04,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 525. [2024-11-14 04:42:04,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 1.1374045801526718) internal successors, (596), 524 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:04,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 596 transitions. [2024-11-14 04:42:04,440 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 596 transitions. Word has length 132 [2024-11-14 04:42:04,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:42:04,441 INFO L471 AbstractCegarLoop]: Abstraction has 525 states and 596 transitions. [2024-11-14 04:42:04,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.753623188405797) internal successors, (380), 138 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:04,441 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 596 transitions. [2024-11-14 04:42:04,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-14 04:42:04,442 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:42:04,442 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:42:04,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-14 04:42:04,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-14 04:42:04,643 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:42:04,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:42:04,643 INFO L85 PathProgramCache]: Analyzing trace with hash 271564477, now seen corresponding path program 27 times [2024-11-14 04:42:04,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:42:04,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010406811] [2024-11-14 04:42:04,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:04,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:42:04,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:07,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1204 backedges. 59 proven. 1141 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:42:07,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:42:07,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010406811] [2024-11-14 04:42:07,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010406811] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:42:07,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216583748] [2024-11-14 04:42:07,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:42:07,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:42:07,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:42:07,672 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:42:07,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-14 04:42:09,690 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:42:09,690 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:42:09,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 212 conjuncts are in the unsatisfiable core [2024-11-14 04:42:09,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:42:11,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:42:11,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1204 backedges. 59 proven. 1141 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:42:11,431 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:42:11,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 04:42:11,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-14 04:42:11,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1204 backedges. 59 proven. 1141 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:42:11,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216583748] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:42:11,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [96316872] [2024-11-14 04:42:11,873 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:42:11,873 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:42:11,873 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:42:11,873 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:42:11,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:42:12,678 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:42:15,836 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '45029#(<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|)' at error location [2024-11-14 04:42:15,836 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:42:15,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:42:15,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 77 [2024-11-14 04:42:15,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646448688] [2024-11-14 04:42:15,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:42:15,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-14 04:42:15,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:42:15,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-14 04:42:15,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=7751, Unknown=0, NotChecked=0, Total=8010 [2024-11-14 04:42:15,838 INFO L87 Difference]: Start difference. First operand 525 states and 596 transitions. Second operand has 77 states, 77 states have (on average 2.4285714285714284) internal successors, (187), 77 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:23,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:42:23,633 INFO L93 Difference]: Finished difference Result 1044 states and 1175 transitions. [2024-11-14 04:42:23,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-11-14 04:42:23,633 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.4285714285714284) internal successors, (187), 77 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2024-11-14 04:42:23,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:42:23,635 INFO L225 Difference]: With dead ends: 1044 [2024-11-14 04:42:23,635 INFO L226 Difference]: Without dead ends: 537 [2024-11-14 04:42:23,636 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4221 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=562, Invalid=17798, Unknown=0, NotChecked=0, Total=18360 [2024-11-14 04:42:23,636 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 167 mSDsluCounter, 4422 mSDsCounter, 0 mSdLazyCounter, 7515 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 4502 SdHoareTripleChecker+Invalid, 7535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 7515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:42:23,637 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 4502 Invalid, 7535 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [20 Valid, 7515 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-11-14 04:42:23,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2024-11-14 04:42:23,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 533. [2024-11-14 04:42:23,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 1.1353383458646618) internal successors, (604), 532 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:23,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 604 transitions. [2024-11-14 04:42:23,644 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 604 transitions. Word has length 134 [2024-11-14 04:42:23,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:42:23,644 INFO L471 AbstractCegarLoop]: Abstraction has 533 states and 604 transitions. [2024-11-14 04:42:23,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.4285714285714284) internal successors, (187), 77 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:23,644 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 604 transitions. [2024-11-14 04:42:23,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-11-14 04:42:23,646 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:42:23,646 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:42:23,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-14 04:42:23,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:42:23,847 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:42:23,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:42:23,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1217774887, now seen corresponding path program 28 times [2024-11-14 04:42:23,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:42:23,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032556101] [2024-11-14 04:42:23,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:23,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:42:23,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 380 proven. 861 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:42:26,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:42:26,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032556101] [2024-11-14 04:42:26,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032556101] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:42:26,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576081382] [2024-11-14 04:42:26,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:42:26,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:42:26,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:42:26,941 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:42:26,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-14 04:42:27,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:27,263 INFO L255 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 195 conjuncts are in the unsatisfiable core [2024-11-14 04:42:27,266 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:42:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 420 proven. 821 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:42:29,126 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:42:31,634 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 7 treesize of output 5 [2024-11-14 04:42:32,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 420 proven. 821 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:42:32,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576081382] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:42:32,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1826545075] [2024-11-14 04:42:32,780 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:42:32,780 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:42:32,780 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:42:32,781 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:42:32,781 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:42:33,259 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:42:35,980 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '47620#(and (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_929| Int) (|v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_926| Int)) (and (<= 1 |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset|) (<= 0 |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_929|) (<= (select |#length| |v_ULTIMATE.start_cstrpbrk_#t~post4#1.base_926|) |v_ULTIMATE.start_cstrpbrk_#t~post4#1.offset_929|))) (= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|))' at error location [2024-11-14 04:42:35,980 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:42:35,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:42:35,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 98 [2024-11-14 04:42:35,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751513881] [2024-11-14 04:42:35,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:42:35,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2024-11-14 04:42:35,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:42:35,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2024-11-14 04:42:35,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1161, Invalid=11495, Unknown=0, NotChecked=0, Total=12656 [2024-11-14 04:42:35,983 INFO L87 Difference]: Start difference. First operand 533 states and 604 transitions. Second operand has 99 states, 98 states have (on average 2.826530612244898) internal successors, (277), 99 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:41,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:42:41,979 INFO L93 Difference]: Finished difference Result 733 states and 807 transitions. [2024-11-14 04:42:41,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-14 04:42:41,980 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 98 states have (on average 2.826530612244898) internal successors, (277), 99 states have internal predecessors, (277), 0 states have call successors, (0), 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 136 [2024-11-14 04:42:41,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:42:41,982 INFO L225 Difference]: With dead ends: 733 [2024-11-14 04:42:41,982 INFO L226 Difference]: Without dead ends: 733 [2024-11-14 04:42:41,983 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 321 SyntacticMatches, 21 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9739 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=1948, Invalid=22232, Unknown=0, NotChecked=0, Total=24180 [2024-11-14 04:42:41,984 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 485 mSDsluCounter, 2230 mSDsCounter, 0 mSdLazyCounter, 4290 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 2312 SdHoareTripleChecker+Invalid, 4290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:42:41,984 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 2312 Invalid, 4290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4290 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-14 04:42:41,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2024-11-14 04:42:41,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 549. [2024-11-14 04:42:41,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 1.1368613138686132) internal successors, (623), 548 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:41,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 623 transitions. [2024-11-14 04:42:41,991 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 623 transitions. Word has length 136 [2024-11-14 04:42:41,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:42:41,991 INFO L471 AbstractCegarLoop]: Abstraction has 549 states and 623 transitions. [2024-11-14 04:42:41,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 98 states have (on average 2.826530612244898) internal successors, (277), 99 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:41,991 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 623 transitions. [2024-11-14 04:42:41,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-11-14 04:42:41,992 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:42:41,993 INFO L215 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:42:42,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-14 04:42:42,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:42:42,193 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:42:42,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:42:42,194 INFO L85 PathProgramCache]: Analyzing trace with hash 827410076, now seen corresponding path program 29 times [2024-11-14 04:42:42,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:42:42,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295671164] [2024-11-14 04:42:42,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:42,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:42:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:42:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1327 backedges. 62 proven. 1261 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:42:45,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:42:45,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295671164] [2024-11-14 04:42:45,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295671164] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:42:45,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420978937] [2024-11-14 04:42:45,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:42:45,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:42:45,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:42:45,512 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:42:45,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-14 04:42:46,983 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-11-14 04:42:46,984 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:42:46,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 228 conjuncts are in the unsatisfiable core [2024-11-14 04:42:46,997 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:42:48,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:42:48,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-14 04:42:48,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1327 backedges. 62 proven. 1261 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:42:48,853 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:42:48,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 04:42:48,997 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 16 treesize of output 12 [2024-11-14 04:42:49,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1327 backedges. 62 proven. 1261 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:42:49,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420978937] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:42:49,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1677087283] [2024-11-14 04:42:49,189 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:42:49,189 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:42:49,189 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:42:49,189 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:42:49,189 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:42:49,630 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:42:51,727 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '49917#(<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|)' at error location [2024-11-14 04:42:51,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:42:51,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:42:51,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 81 [2024-11-14 04:42:51,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023516951] [2024-11-14 04:42:51,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:42:51,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-11-14 04:42:51,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:42:51,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-11-14 04:42:51,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=8254, Unknown=2, NotChecked=0, Total=8556 [2024-11-14 04:42:51,729 INFO L87 Difference]: Start difference. First operand 549 states and 623 transitions. Second operand has 81 states, 81 states have (on average 2.432098765432099) internal successors, (197), 81 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:58,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:42:58,333 INFO L93 Difference]: Finished difference Result 1093 states and 1230 transitions. [2024-11-14 04:42:58,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-11-14 04:42:58,333 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.432098765432099) internal successors, (197), 81 states have internal predecessors, (197), 0 states have call successors, (0), 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 140 [2024-11-14 04:42:58,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:42:58,335 INFO L225 Difference]: With dead ends: 1093 [2024-11-14 04:42:58,335 INFO L226 Difference]: Without dead ends: 561 [2024-11-14 04:42:58,336 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4467 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=638, Invalid=19100, Unknown=2, NotChecked=0, Total=19740 [2024-11-14 04:42:58,336 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 279 mSDsluCounter, 4557 mSDsCounter, 0 mSdLazyCounter, 7799 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 4641 SdHoareTripleChecker+Invalid, 7820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 7799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:42:58,336 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 4641 Invalid, 7820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 7799 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-11-14 04:42:58,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2024-11-14 04:42:58,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 557. [2024-11-14 04:42:58,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 1.1348920863309353) internal successors, (631), 556 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:58,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 631 transitions. [2024-11-14 04:42:58,342 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 631 transitions. Word has length 140 [2024-11-14 04:42:58,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:42:58,342 INFO L471 AbstractCegarLoop]: Abstraction has 557 states and 631 transitions. [2024-11-14 04:42:58,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.432098765432099) internal successors, (197), 81 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:42:58,342 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 631 transitions. [2024-11-14 04:42:58,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-11-14 04:42:58,343 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:42:58,344 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:42:58,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-14 04:42:58,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:42:58,544 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:42:58,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:42:58,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1391279544, now seen corresponding path program 30 times [2024-11-14 04:42:58,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:42:58,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502631820] [2024-11-14 04:42:58,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:42:58,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:42:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:43:00,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 420 proven. 946 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:43:00,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:43:00,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502631820] [2024-11-14 04:43:00,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502631820] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:43:00,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910890809] [2024-11-14 04:43:00,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:43:00,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:43:00,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:43:00,995 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:43:00,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-14 04:43:01,874 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:43:01,874 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:43:01,881 INFO L255 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 202 conjuncts are in the unsatisfiable core [2024-11-14 04:43:01,884 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:43:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 462 proven. 904 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:43:03,865 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:43:06,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-14 04:43:07,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 462 proven. 904 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:43:07,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910890809] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:43:07,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [168741980] [2024-11-14 04:43:07,887 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:43:07,887 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:43:07,887 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:43:07,888 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:43:07,888 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:43:08,460 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:43:12,425 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '52624#(<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|)' at error location [2024-11-14 04:43:12,425 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:43:12,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:43:12,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 102 [2024-11-14 04:43:12,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523056853] [2024-11-14 04:43:12,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:43:12,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2024-11-14 04:43:12,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:43:12,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2024-11-14 04:43:12,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1240, Invalid=11640, Unknown=2, NotChecked=0, Total=12882 [2024-11-14 04:43:12,428 INFO L87 Difference]: Start difference. First operand 557 states and 631 transitions. Second operand has 103 states, 102 states have (on average 2.8333333333333335) internal successors, (289), 103 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:19,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:43:19,058 INFO L93 Difference]: Finished difference Result 766 states and 843 transitions. [2024-11-14 04:43:19,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-14 04:43:19,059 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 102 states have (on average 2.8333333333333335) internal successors, (289), 103 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2024-11-14 04:43:19,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:43:19,061 INFO L225 Difference]: With dead ends: 766 [2024-11-14 04:43:19,061 INFO L226 Difference]: Without dead ends: 766 [2024-11-14 04:43:19,062 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 316 SyntacticMatches, 45 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12375 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=2086, Invalid=23034, Unknown=2, NotChecked=0, Total=25122 [2024-11-14 04:43:19,063 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 510 mSDsluCounter, 2664 mSDsCounter, 0 mSdLazyCounter, 5135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 2750 SdHoareTripleChecker+Invalid, 5135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:43:19,063 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 2750 Invalid, 5135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5135 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-11-14 04:43:19,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2024-11-14 04:43:19,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 573. [2024-11-14 04:43:19,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 1.1363636363636365) internal successors, (650), 572 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:19,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 650 transitions. [2024-11-14 04:43:19,075 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 650 transitions. Word has length 142 [2024-11-14 04:43:19,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:43:19,075 INFO L471 AbstractCegarLoop]: Abstraction has 573 states and 650 transitions. [2024-11-14 04:43:19,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 102 states have (on average 2.8333333333333335) internal successors, (289), 103 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:19,076 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 650 transitions. [2024-11-14 04:43:19,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2024-11-14 04:43:19,077 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:43:19,077 INFO L215 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:43:19,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-11-14 04:43:19,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:43:19,278 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:43:19,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:43:19,278 INFO L85 PathProgramCache]: Analyzing trace with hash 2076819963, now seen corresponding path program 31 times [2024-11-14 04:43:19,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:43:19,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545325510] [2024-11-14 04:43:19,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:43:19,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:43:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:43:22,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1456 backedges. 65 proven. 1387 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:43:22,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:43:22,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545325510] [2024-11-14 04:43:22,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545325510] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:43:22,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608622016] [2024-11-14 04:43:22,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:43:22,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:43:22,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:43:22,700 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:43:22,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-14 04:43:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:43:23,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 234 conjuncts are in the unsatisfiable core [2024-11-14 04:43:23,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:43:24,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:43:25,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1456 backedges. 65 proven. 1387 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:43:25,168 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:43:25,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-14 04:43:25,393 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 16 treesize of output 12 [2024-11-14 04:43:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1456 backedges. 65 proven. 1387 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:43:25,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608622016] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:43:25,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [228363067] [2024-11-14 04:43:25,663 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-14 04:43:25,663 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:43:25,664 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:43:25,664 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:43:25,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:43:26,194 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:43:28,902 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '55017#(<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|)' at error location [2024-11-14 04:43:28,902 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:43:28,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:43:28,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 83 [2024-11-14 04:43:28,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948381164] [2024-11-14 04:43:28,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:43:28,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-14 04:43:28,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:43:28,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-14 04:43:28,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=8621, Unknown=2, NotChecked=0, Total=8930 [2024-11-14 04:43:28,905 INFO L87 Difference]: Start difference. First operand 573 states and 650 transitions. Second operand has 83 states, 83 states have (on average 2.4457831325301207) internal successors, (203), 83 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:38,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:43:38,315 INFO L93 Difference]: Finished difference Result 1142 states and 1285 transitions. [2024-11-14 04:43:38,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-11-14 04:43:38,316 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.4457831325301207) internal successors, (203), 83 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2024-11-14 04:43:38,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:43:38,318 INFO L225 Difference]: With dead ends: 1142 [2024-11-14 04:43:38,318 INFO L226 Difference]: Without dead ends: 585 [2024-11-14 04:43:38,319 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4673 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=658, Invalid=20220, Unknown=2, NotChecked=0, Total=20880 [2024-11-14 04:43:38,320 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 292 mSDsluCounter, 5266 mSDsCounter, 0 mSdLazyCounter, 8986 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 5354 SdHoareTripleChecker+Invalid, 9008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 8986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:43:38,320 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 5354 Invalid, 9008 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [22 Valid, 8986 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2024-11-14 04:43:38,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2024-11-14 04:43:38,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 581. [2024-11-14 04:43:38,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 580 states have (on average 1.1344827586206896) internal successors, (658), 580 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:38,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 658 transitions. [2024-11-14 04:43:38,328 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 658 transitions. Word has length 146 [2024-11-14 04:43:38,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:43:38,328 INFO L471 AbstractCegarLoop]: Abstraction has 581 states and 658 transitions. [2024-11-14 04:43:38,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.4457831325301207) internal successors, (203), 83 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:38,329 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 658 transitions. [2024-11-14 04:43:38,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-14 04:43:38,330 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:43:38,330 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:43:38,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-14 04:43:38,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:43:38,531 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-14 04:43:38,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:43:38,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1451297769, now seen corresponding path program 32 times [2024-11-14 04:43:38,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:43:38,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027556015] [2024-11-14 04:43:38,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:43:38,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:43:38,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:43:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1501 backedges. 462 proven. 1035 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:43:43,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:43:43,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027556015] [2024-11-14 04:43:43,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027556015] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:43:43,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168839286] [2024-11-14 04:43:43,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:43:43,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:43:43,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:43:43,086 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:43:43,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcb99524-6fbc-47ed-9f2a-7ff1af68b1cf/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-14 04:43:46,148 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2024-11-14 04:43:46,148 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:43:46,159 INFO L255 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 233 conjuncts are in the unsatisfiable core [2024-11-14 04:43:46,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:43:47,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10