./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0217_1.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_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/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_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0217_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/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_9d34143e-efed-41eb-b3c0-cce9d472e6bb/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 e4aac8fd1b71e0bd84f9ab8e5c238dc6bf3a295fcb9cebe504ba6d0c9a6a7b7a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:44:07,095 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:44:07,175 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-14 03:44:07,181 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:44:07,181 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:44:07,217 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:44:07,219 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:44:07,219 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:44:07,220 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:44:07,220 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:44:07,221 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:44:07,222 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:44:07,222 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:44:07,222 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:44:07,222 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:44:07,222 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:44:07,223 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:44:07,223 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:44:07,223 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:44:07,223 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:44:07,223 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:44:07,224 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:44:07,224 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-14 03:44:07,224 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-14 03:44:07,224 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:44:07,225 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:44:07,225 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:44:07,225 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:44:07,225 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:44:07,226 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-14 03:44:07,226 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-14 03:44:07,226 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-14 03:44:07,226 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:44:07,226 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 03:44:07,226 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:44:07,226 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 03:44:07,227 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:44:07,227 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:44:07,228 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:44:07,228 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:44:07,228 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:44:07,228 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:44:07,229 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:44:07,229 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:44:07,229 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:44:07,230 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:44:07,230 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:44:07,230 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:44:07,230 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:44:07,230 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_9d34143e-efed-41eb-b3c0-cce9d472e6bb/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 -> e4aac8fd1b71e0bd84f9ab8e5c238dc6bf3a295fcb9cebe504ba6d0c9a6a7b7a [2024-11-14 03:44:07,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:44:07,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:44:07,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:44:07,553 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:44:07,553 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:44:07,554 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/list-ext-properties/test-0217_1.i Unable to find full path for "g++" [2024-11-14 03:44:09,529 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:44:09,981 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:44:09,982 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/sv-benchmarks/c/list-ext-properties/test-0217_1.i [2024-11-14 03:44:10,008 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/data/234ae4774/3a408203fcfc41a7a901bbcdd8bbf468/FLAG6eb65ed35 [2024-11-14 03:44:10,041 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/data/234ae4774/3a408203fcfc41a7a901bbcdd8bbf468 [2024-11-14 03:44:10,044 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:44:10,046 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:44:10,050 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:44:10,051 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:44:10,061 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:44:10,062 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:44:10" (1/1) ... [2024-11-14 03:44:10,063 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bb302c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:44:10, skipping insertion in model container [2024-11-14 03:44:10,063 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:44:10" (1/1) ... [2024-11-14 03:44:10,122 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:44:10,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:44:10,608 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:44:10,695 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:44:10,732 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:44:10,733 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:44:10 WrapperNode [2024-11-14 03:44:10,734 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:44:10,735 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:44:10,736 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:44:10,736 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:44:10,744 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:44:10" (1/1) ... [2024-11-14 03:44:10,760 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:44:10" (1/1) ... [2024-11-14 03:44:10,786 INFO L138 Inliner]: procedures = 181, calls = 47, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 249 [2024-11-14 03:44:10,786 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:44:10,787 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:44:10,787 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:44:10,787 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:44:10,795 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:44:10" (1/1) ... [2024-11-14 03:44:10,795 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:44:10" (1/1) ... [2024-11-14 03:44:10,799 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:44:10" (1/1) ... [2024-11-14 03:44:10,800 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:44:10" (1/1) ... [2024-11-14 03:44:10,811 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:44:10" (1/1) ... [2024-11-14 03:44:10,815 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:44:10" (1/1) ... [2024-11-14 03:44:10,817 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:44:10" (1/1) ... [2024-11-14 03:44:10,819 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:44:10" (1/1) ... [2024-11-14 03:44:10,822 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:44:10,823 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:44:10,823 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:44:10,823 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:44:10,824 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:44:10" (1/1) ... [2024-11-14 03:44:10,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:44:10,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:44:10,867 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:44:10,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:44:10,905 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2024-11-14 03:44:10,906 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2024-11-14 03:44:10,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 03:44:10,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-14 03:44:10,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:44:10,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-14 03:44:10,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-14 03:44:10,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 03:44:10,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2024-11-14 03:44:10,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:44:10,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:44:10,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:44:11,091 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:44:11,092 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:44:11,856 INFO L? ?]: Removed 186 outVars from TransFormulas that were not future-live. [2024-11-14 03:44:11,856 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:44:12,133 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:44:12,135 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-14 03:44:12,135 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:44:12 BoogieIcfgContainer [2024-11-14 03:44:12,136 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:44:12,140 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:44:12,140 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:44:12,147 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:44:12,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:44:10" (1/3) ... [2024-11-14 03:44:12,149 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b830fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:44:12, skipping insertion in model container [2024-11-14 03:44:12,149 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:44:10" (2/3) ... [2024-11-14 03:44:12,149 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b830fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:44:12, skipping insertion in model container [2024-11-14 03:44:12,149 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:44:12" (3/3) ... [2024-11-14 03:44:12,151 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0217_1.i [2024-11-14 03:44:12,166 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:44:12,167 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG test-0217_1.i that has 2 procedures, 138 locations, 1 initial locations, 6 loop locations, and 67 error locations. [2024-11-14 03:44:12,221 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:44:12,234 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;@204b349e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:44:12,234 INFO L334 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2024-11-14 03:44:12,239 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 67 states have (on average 2.2686567164179103) internal successors, (152), 134 states have internal predecessors, (152), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 03:44:12,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 03:44:12,245 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:44:12,245 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 03:44:12,246 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:44:12,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:44:12,251 INFO L85 PathProgramCache]: Analyzing trace with hash 11088240, now seen corresponding path program 1 times [2024-11-14 03:44:12,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:44:12,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572896455] [2024-11-14 03:44:12,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:12,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:44:12,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:12,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:44:12,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:44:12,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572896455] [2024-11-14 03:44:12,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572896455] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:44:12,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:44:12,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:44:12,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899600308] [2024-11-14 03:44:12,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:44:12,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-14 03:44:12,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:44:12,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-14 03:44:12,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 03:44:12,449 INFO L87 Difference]: Start difference. First operand has 138 states, 67 states have (on average 2.2686567164179103) internal successors, (152), 134 states have internal predecessors, (152), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 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 03:44:12,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:44:12,591 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2024-11-14 03:44:12,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-14 03:44:12,594 INFO L78 Accepts]: Start accepts. Automaton has has 2 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 03:44:12,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:44:12,607 INFO L225 Difference]: With dead ends: 138 [2024-11-14 03:44:12,607 INFO L226 Difference]: Without dead ends: 137 [2024-11-14 03:44:12,610 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 03:44:12,616 INFO L432 NwaCegarLoop]: 126 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:44:12,616 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 126 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:44:12,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-14 03:44:12,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2024-11-14 03:44:12,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 67 states have (on average 2.1940298507462686) internal successors, (147), 133 states have internal predecessors, (147), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 03:44:12,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2024-11-14 03:44:12,668 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 4 [2024-11-14 03:44:12,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:44:12,669 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2024-11-14 03:44:12,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 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 03:44:12,669 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2024-11-14 03:44:12,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 03:44:12,669 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:44:12,670 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 03:44:12,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:44:12,670 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:44:12,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:44:12,671 INFO L85 PathProgramCache]: Analyzing trace with hash 345546031, now seen corresponding path program 1 times [2024-11-14 03:44:12,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:44:12,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7301195] [2024-11-14 03:44:12,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:12,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:44:12,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:44:12,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:44:12,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7301195] [2024-11-14 03:44:12,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7301195] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:44:12,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:44:12,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 03:44:12,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795061357] [2024-11-14 03:44:12,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:44:12,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:44:12,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:44:12,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:44:12,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:44:12,901 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:44:13,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:44:13,276 INFO L93 Difference]: Finished difference Result 267 states and 294 transitions. [2024-11-14 03:44:13,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:44:13,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-14 03:44:13,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:44:13,280 INFO L225 Difference]: With dead ends: 267 [2024-11-14 03:44:13,280 INFO L226 Difference]: Without dead ends: 267 [2024-11-14 03:44:13,280 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 03:44:13,284 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 135 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:44:13,285 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 152 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:44:13,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-11-14 03:44:13,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 180. [2024-11-14 03:44:13,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 107 states have (on average 2.177570093457944) internal successors, (233), 173 states have internal predecessors, (233), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 03:44:13,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 241 transitions. [2024-11-14 03:44:13,313 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 241 transitions. Word has length 5 [2024-11-14 03:44:13,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:44:13,313 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 241 transitions. [2024-11-14 03:44:13,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:44:13,313 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 241 transitions. [2024-11-14 03:44:13,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 03:44:13,314 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:44:13,317 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 03:44:13,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 03:44:13,317 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:44:13,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:44:13,318 INFO L85 PathProgramCache]: Analyzing trace with hash 345546032, now seen corresponding path program 1 times [2024-11-14 03:44:13,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:44:13,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233189809] [2024-11-14 03:44:13,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:13,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:44:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:13,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:44:13,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:44:13,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233189809] [2024-11-14 03:44:13,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233189809] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:44:13,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:44:13,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:44:13,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934195241] [2024-11-14 03:44:13,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:44:13,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:44:13,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:44:13,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:44:13,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:44:13,674 INFO L87 Difference]: Start difference. First operand 180 states and 241 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:44:13,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:44:13,989 INFO L93 Difference]: Finished difference Result 284 states and 363 transitions. [2024-11-14 03:44:13,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:44:13,990 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-14 03:44:13,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:44:13,991 INFO L225 Difference]: With dead ends: 284 [2024-11-14 03:44:13,996 INFO L226 Difference]: Without dead ends: 284 [2024-11-14 03:44:13,996 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:44:13,997 INFO L432 NwaCegarLoop]: 107 mSDtfsCounter, 88 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:44:13,997 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 243 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:44:13,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2024-11-14 03:44:14,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 240. [2024-11-14 03:44:14,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 161 states have (on average 2.0683229813664594) internal successors, (333), 229 states have internal predecessors, (333), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-14 03:44:14,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 349 transitions. [2024-11-14 03:44:14,027 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 349 transitions. Word has length 5 [2024-11-14 03:44:14,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:44:14,027 INFO L471 AbstractCegarLoop]: Abstraction has 240 states and 349 transitions. [2024-11-14 03:44:14,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:44:14,027 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 349 transitions. [2024-11-14 03:44:14,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 03:44:14,028 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:44:14,028 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:44:14,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 03:44:14,028 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:44:14,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:44:14,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1357298966, now seen corresponding path program 1 times [2024-11-14 03:44:14,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:44:14,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632512656] [2024-11-14 03:44:14,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:14,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:44:14,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:44:14,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:44:14,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632512656] [2024-11-14 03:44:14,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632512656] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:44:14,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:44:14,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:44:14,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206723599] [2024-11-14 03:44:14,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:44:14,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:44:14,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:44:14,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:44:14,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:44:14,092 INFO L87 Difference]: Start difference. First operand 240 states and 349 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:44:14,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:44:14,216 INFO L93 Difference]: Finished difference Result 347 states and 468 transitions. [2024-11-14 03:44:14,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:44:14,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-14 03:44:14,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:44:14,219 INFO L225 Difference]: With dead ends: 347 [2024-11-14 03:44:14,219 INFO L226 Difference]: Without dead ends: 347 [2024-11-14 03:44:14,219 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:44:14,220 INFO L432 NwaCegarLoop]: 125 mSDtfsCounter, 126 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:44:14,221 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 248 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:44:14,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2024-11-14 03:44:14,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 241. [2024-11-14 03:44:14,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 162 states have (on average 2.0617283950617282) internal successors, (334), 230 states have internal predecessors, (334), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-14 03:44:14,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 350 transitions. [2024-11-14 03:44:14,237 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 350 transitions. Word has length 7 [2024-11-14 03:44:14,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:44:14,238 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 350 transitions. [2024-11-14 03:44:14,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:44:14,238 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 350 transitions. [2024-11-14 03:44:14,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 03:44:14,238 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:44:14,239 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:44:14,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 03:44:14,239 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:44:14,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:44:14,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1357300716, now seen corresponding path program 1 times [2024-11-14 03:44:14,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:44:14,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339737284] [2024-11-14 03:44:14,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:14,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:44:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:14,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:44:14,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:44:14,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339737284] [2024-11-14 03:44:14,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339737284] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:44:14,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:44:14,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 03:44:14,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306310213] [2024-11-14 03:44:14,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:44:14,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:44:14,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:44:14,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:44:14,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:44:14,274 INFO L87 Difference]: Start difference. First operand 241 states and 350 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:44:14,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:44:14,500 INFO L93 Difference]: Finished difference Result 288 states and 393 transitions. [2024-11-14 03:44:14,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:44:14,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-14 03:44:14,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:44:14,504 INFO L225 Difference]: With dead ends: 288 [2024-11-14 03:44:14,505 INFO L226 Difference]: Without dead ends: 284 [2024-11-14 03:44:14,505 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 03:44:14,506 INFO L432 NwaCegarLoop]: 106 mSDtfsCounter, 59 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:44:14,506 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 180 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:44:14,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2024-11-14 03:44:14,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 239. [2024-11-14 03:44:14,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 160 states have (on average 2.06875) internal successors, (331), 228 states have internal predecessors, (331), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-14 03:44:14,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 347 transitions. [2024-11-14 03:44:14,521 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 347 transitions. Word has length 7 [2024-11-14 03:44:14,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:44:14,521 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 347 transitions. [2024-11-14 03:44:14,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:44:14,521 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 347 transitions. [2024-11-14 03:44:14,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 03:44:14,522 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:44:14,522 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:44:14,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 03:44:14,523 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:44:14,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:44:14,523 INFO L85 PathProgramCache]: Analyzing trace with hash 793186632, now seen corresponding path program 1 times [2024-11-14 03:44:14,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:44:14,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248637957] [2024-11-14 03:44:14,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:14,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:44:14,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:44:14,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:44:14,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248637957] [2024-11-14 03:44:14,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248637957] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:44:14,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:44:14,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 03:44:14,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586613467] [2024-11-14 03:44:14,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:44:14,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:44:14,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:44:14,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:44:14,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:44:14,987 INFO L87 Difference]: Start difference. First operand 239 states and 347 transitions. Second operand has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:15,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:44:15,664 INFO L93 Difference]: Finished difference Result 370 states and 477 transitions. [2024-11-14 03:44:15,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:44:15,665 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-11-14 03:44:15,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:44:15,667 INFO L225 Difference]: With dead ends: 370 [2024-11-14 03:44:15,667 INFO L226 Difference]: Without dead ends: 370 [2024-11-14 03:44:15,667 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:44:15,668 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 197 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:44:15,668 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 243 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:44:15,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2024-11-14 03:44:15,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 254. [2024-11-14 03:44:15,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 175 states have (on average 2.097142857142857) internal successors, (367), 243 states have internal predecessors, (367), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-14 03:44:15,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 383 transitions. [2024-11-14 03:44:15,694 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 383 transitions. Word has length 10 [2024-11-14 03:44:15,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:44:15,694 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 383 transitions. [2024-11-14 03:44:15,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:15,695 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 383 transitions. [2024-11-14 03:44:15,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 03:44:15,695 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:44:15,695 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:44:15,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 03:44:15,695 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:44:15,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:44:15,698 INFO L85 PathProgramCache]: Analyzing trace with hash 793186631, now seen corresponding path program 1 times [2024-11-14 03:44:15,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:44:15,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381605012] [2024-11-14 03:44:15,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:15,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:44:15,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:44:15,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:44:15,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381605012] [2024-11-14 03:44:15,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381605012] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:44:15,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:44:15,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:44:15,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127795598] [2024-11-14 03:44:15,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:44:15,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:44:15,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:44:15,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:44:15,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:44:15,838 INFO L87 Difference]: Start difference. First operand 254 states and 383 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:16,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:44:16,170 INFO L93 Difference]: Finished difference Result 350 states and 464 transitions. [2024-11-14 03:44:16,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:44:16,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-11-14 03:44:16,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:44:16,172 INFO L225 Difference]: With dead ends: 350 [2024-11-14 03:44:16,172 INFO L226 Difference]: Without dead ends: 350 [2024-11-14 03:44:16,172 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:44:16,173 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 187 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:44:16,173 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 195 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:44:16,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2024-11-14 03:44:16,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 250. [2024-11-14 03:44:16,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 175 states have (on average 2.0228571428571427) internal successors, (354), 239 states have internal predecessors, (354), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-14 03:44:16,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 370 transitions. [2024-11-14 03:44:16,189 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 370 transitions. Word has length 10 [2024-11-14 03:44:16,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:44:16,189 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 370 transitions. [2024-11-14 03:44:16,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:16,190 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 370 transitions. [2024-11-14 03:44:16,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-14 03:44:16,191 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:44:16,191 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:44:16,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-14 03:44:16,191 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:44:16,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:44:16,192 INFO L85 PathProgramCache]: Analyzing trace with hash -2045374666, now seen corresponding path program 1 times [2024-11-14 03:44:16,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:44:16,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606046795] [2024-11-14 03:44:16,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:16,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:44:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:16,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:44:16,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:44:16,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606046795] [2024-11-14 03:44:16,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606046795] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:44:16,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:44:16,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:44:16,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912282287] [2024-11-14 03:44:16,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:44:16,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:44:16,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:44:16,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:44:16,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:44:16,296 INFO L87 Difference]: Start difference. First operand 250 states and 370 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:16,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:44:16,615 INFO L93 Difference]: Finished difference Result 347 states and 458 transitions. [2024-11-14 03:44:16,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:44:16,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-11-14 03:44:16,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:44:16,618 INFO L225 Difference]: With dead ends: 347 [2024-11-14 03:44:16,618 INFO L226 Difference]: Without dead ends: 347 [2024-11-14 03:44:16,618 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:44:16,619 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 131 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:44:16,619 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 217 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:44:16,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2024-11-14 03:44:16,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 256. [2024-11-14 03:44:16,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 181 states have (on average 1.988950276243094) internal successors, (360), 245 states have internal predecessors, (360), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-14 03:44:16,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 376 transitions. [2024-11-14 03:44:16,639 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 376 transitions. Word has length 12 [2024-11-14 03:44:16,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:44:16,639 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 376 transitions. [2024-11-14 03:44:16,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:16,640 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 376 transitions. [2024-11-14 03:44:16,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-14 03:44:16,641 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:44:16,641 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:44:16,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 03:44:16,641 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:44:16,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:44:16,642 INFO L85 PathProgramCache]: Analyzing trace with hash -2045374665, now seen corresponding path program 1 times [2024-11-14 03:44:16,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:44:16,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865761229] [2024-11-14 03:44:16,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:16,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:44:16,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:44:16,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:44:16,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865761229] [2024-11-14 03:44:16,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865761229] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:44:16,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:44:16,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:44:16,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032304423] [2024-11-14 03:44:16,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:44:16,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:44:16,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:44:16,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:44:16,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:44:16,803 INFO L87 Difference]: Start difference. First operand 256 states and 376 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:17,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:44:17,094 INFO L93 Difference]: Finished difference Result 288 states and 374 transitions. [2024-11-14 03:44:17,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:44:17,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-11-14 03:44:17,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:44:17,096 INFO L225 Difference]: With dead ends: 288 [2024-11-14 03:44:17,096 INFO L226 Difference]: Without dead ends: 288 [2024-11-14 03:44:17,096 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:44:17,097 INFO L432 NwaCegarLoop]: 105 mSDtfsCounter, 75 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:44:17,097 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 255 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:44:17,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2024-11-14 03:44:17,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 256. [2024-11-14 03:44:17,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 181 states have (on average 1.9558011049723756) internal successors, (354), 245 states have internal predecessors, (354), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-14 03:44:17,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 370 transitions. [2024-11-14 03:44:17,107 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 370 transitions. Word has length 12 [2024-11-14 03:44:17,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:44:17,107 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 370 transitions. [2024-11-14 03:44:17,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:17,107 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 370 transitions. [2024-11-14 03:44:17,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-14 03:44:17,108 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:44:17,108 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:44:17,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 03:44:17,108 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:44:17,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:44:17,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1079474206, now seen corresponding path program 1 times [2024-11-14 03:44:17,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:44:17,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85037360] [2024-11-14 03:44:17,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:17,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:44:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:17,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:44:17,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:44:17,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85037360] [2024-11-14 03:44:17,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85037360] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:44:17,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:44:17,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-14 03:44:17,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44106835] [2024-11-14 03:44:17,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:44:17,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:44:17,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:44:17,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:44:17,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:44:17,404 INFO L87 Difference]: Start difference. First operand 256 states and 370 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:17,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:44:17,822 INFO L93 Difference]: Finished difference Result 337 states and 460 transitions. [2024-11-14 03:44:17,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 03:44:17,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-14 03:44:17,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:44:17,824 INFO L225 Difference]: With dead ends: 337 [2024-11-14 03:44:17,825 INFO L226 Difference]: Without dead ends: 337 [2024-11-14 03:44:17,825 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-14 03:44:17,826 INFO L432 NwaCegarLoop]: 113 mSDtfsCounter, 79 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:44:17,826 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 637 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:44:17,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2024-11-14 03:44:17,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 295. [2024-11-14 03:44:17,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 217 states have (on average 1.9078341013824884) internal successors, (414), 280 states have internal predecessors, (414), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-14 03:44:17,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 434 transitions. [2024-11-14 03:44:17,838 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 434 transitions. Word has length 13 [2024-11-14 03:44:17,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:44:17,838 INFO L471 AbstractCegarLoop]: Abstraction has 295 states and 434 transitions. [2024-11-14 03:44:17,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:17,838 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 434 transitions. [2024-11-14 03:44:17,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 03:44:17,839 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:44:17,839 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:44:17,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-14 03:44:17,839 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:44:17,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:44:17,840 INFO L85 PathProgramCache]: Analyzing trace with hash 896325609, now seen corresponding path program 1 times [2024-11-14 03:44:17,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:44:17,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151984411] [2024-11-14 03:44:17,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:17,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:44:17,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:44:17,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:44:17,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151984411] [2024-11-14 03:44:17,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151984411] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:44:17,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:44:17,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:44:17,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176248408] [2024-11-14 03:44:17,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:44:17,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:44:17,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:44:17,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:44:17,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:44:17,892 INFO L87 Difference]: Start difference. First operand 295 states and 434 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:18,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:44:18,057 INFO L93 Difference]: Finished difference Result 292 states and 425 transitions. [2024-11-14 03:44:18,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:44:18,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-14 03:44:18,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:44:18,061 INFO L225 Difference]: With dead ends: 292 [2024-11-14 03:44:18,061 INFO L226 Difference]: Without dead ends: 292 [2024-11-14 03:44:18,061 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:44:18,062 INFO L432 NwaCegarLoop]: 111 mSDtfsCounter, 19 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:44:18,063 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 172 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:44:18,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2024-11-14 03:44:18,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2024-11-14 03:44:18,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 217 states have (on average 1.8663594470046083) internal successors, (405), 277 states have internal predecessors, (405), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-14 03:44:18,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 425 transitions. [2024-11-14 03:44:18,075 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 425 transitions. Word has length 14 [2024-11-14 03:44:18,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:44:18,075 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 425 transitions. [2024-11-14 03:44:18,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:18,075 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 425 transitions. [2024-11-14 03:44:18,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 03:44:18,077 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:44:18,077 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:44:18,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-14 03:44:18,077 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:44:18,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:44:18,077 INFO L85 PathProgramCache]: Analyzing trace with hash 896325610, now seen corresponding path program 1 times [2024-11-14 03:44:18,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:44:18,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065101407] [2024-11-14 03:44:18,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:18,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:44:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:44:18,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:44:18,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065101407] [2024-11-14 03:44:18,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065101407] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:44:18,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:44:18,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:44:18,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288529100] [2024-11-14 03:44:18,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:44:18,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:44:18,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:44:18,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:44:18,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:44:18,257 INFO L87 Difference]: Start difference. First operand 292 states and 425 transitions. Second operand has 5 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:18,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:44:18,450 INFO L93 Difference]: Finished difference Result 291 states and 422 transitions. [2024-11-14 03:44:18,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:44:18,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-14 03:44:18,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:44:18,452 INFO L225 Difference]: With dead ends: 291 [2024-11-14 03:44:18,452 INFO L226 Difference]: Without dead ends: 291 [2024-11-14 03:44:18,453 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:44:18,453 INFO L432 NwaCegarLoop]: 111 mSDtfsCounter, 11 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:44:18,454 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 404 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:44:18,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2024-11-14 03:44:18,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2024-11-14 03:44:18,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 217 states have (on average 1.8525345622119815) internal successors, (402), 276 states have internal predecessors, (402), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-14 03:44:18,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 422 transitions. [2024-11-14 03:44:18,466 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 422 transitions. Word has length 14 [2024-11-14 03:44:18,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:44:18,466 INFO L471 AbstractCegarLoop]: Abstraction has 291 states and 422 transitions. [2024-11-14 03:44:18,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:18,466 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 422 transitions. [2024-11-14 03:44:18,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 03:44:18,467 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:44:18,467 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:44:18,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-14 03:44:18,467 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:44:18,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:44:18,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1780625594, now seen corresponding path program 1 times [2024-11-14 03:44:18,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:44:18,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253286075] [2024-11-14 03:44:18,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:18,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:44:18,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:44:18,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:44:18,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253286075] [2024-11-14 03:44:18,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253286075] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:44:18,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:44:18,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 03:44:18,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068766236] [2024-11-14 03:44:18,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:44:18,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:44:18,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:44:18,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:44:18,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:44:18,813 INFO L87 Difference]: Start difference. First operand 291 states and 422 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:19,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:44:19,224 INFO L93 Difference]: Finished difference Result 323 states and 433 transitions. [2024-11-14 03:44:19,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:44:19,226 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-11-14 03:44:19,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:44:19,228 INFO L225 Difference]: With dead ends: 323 [2024-11-14 03:44:19,228 INFO L226 Difference]: Without dead ends: 323 [2024-11-14 03:44:19,228 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-11-14 03:44:19,229 INFO L432 NwaCegarLoop]: 114 mSDtfsCounter, 67 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:44:19,229 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 424 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:44:19,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2024-11-14 03:44:19,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 285. [2024-11-14 03:44:19,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 211 states have (on average 1.853080568720379) internal successors, (391), 270 states have internal predecessors, (391), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-14 03:44:19,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 411 transitions. [2024-11-14 03:44:19,257 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 411 transitions. Word has length 16 [2024-11-14 03:44:19,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:44:19,257 INFO L471 AbstractCegarLoop]: Abstraction has 285 states and 411 transitions. [2024-11-14 03:44:19,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:19,257 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 411 transitions. [2024-11-14 03:44:19,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 03:44:19,258 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:44:19,258 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:44:19,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-14 03:44:19,258 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:44:19,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:44:19,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1919513620, now seen corresponding path program 1 times [2024-11-14 03:44:19,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:44:19,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748442592] [2024-11-14 03:44:19,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:19,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:44:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:44:19,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:44:19,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748442592] [2024-11-14 03:44:19,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748442592] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:44:19,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:44:19,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 03:44:19,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141916947] [2024-11-14 03:44:19,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:44:19,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:44:19,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:44:19,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:44:19,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:44:19,435 INFO L87 Difference]: Start difference. First operand 285 states and 411 transitions. Second operand has 6 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:19,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:44:19,651 INFO L93 Difference]: Finished difference Result 284 states and 408 transitions. [2024-11-14 03:44:19,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:44:19,651 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-11-14 03:44:19,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:44:19,653 INFO L225 Difference]: With dead ends: 284 [2024-11-14 03:44:19,653 INFO L226 Difference]: Without dead ends: 284 [2024-11-14 03:44:19,653 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:44:19,654 INFO L432 NwaCegarLoop]: 108 mSDtfsCounter, 31 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:44:19,654 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 492 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:44:19,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2024-11-14 03:44:19,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2024-11-14 03:44:19,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 211 states have (on average 1.838862559241706) internal successors, (388), 269 states have internal predecessors, (388), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-14 03:44:19,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 408 transitions. [2024-11-14 03:44:19,665 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 408 transitions. Word has length 16 [2024-11-14 03:44:19,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:44:19,666 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 408 transitions. [2024-11-14 03:44:19,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:19,666 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 408 transitions. [2024-11-14 03:44:19,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 03:44:19,666 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:44:19,667 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:44:19,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-14 03:44:19,667 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:44:19,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:44:19,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1919513814, now seen corresponding path program 1 times [2024-11-14 03:44:19,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:44:19,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373518829] [2024-11-14 03:44:19,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:19,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:44:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:19,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:44:19,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:44:19,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373518829] [2024-11-14 03:44:19,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373518829] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:44:19,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:44:19,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 03:44:19,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435651449] [2024-11-14 03:44:19,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:44:19,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:44:19,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:44:19,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:44:19,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:44:19,783 INFO L87 Difference]: Start difference. First operand 284 states and 408 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:19,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:44:19,964 INFO L93 Difference]: Finished difference Result 312 states and 445 transitions. [2024-11-14 03:44:19,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:44:19,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-11-14 03:44:19,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:44:19,966 INFO L225 Difference]: With dead ends: 312 [2024-11-14 03:44:19,966 INFO L226 Difference]: Without dead ends: 312 [2024-11-14 03:44:19,967 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:44:19,967 INFO L432 NwaCegarLoop]: 110 mSDtfsCounter, 11 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:44:19,967 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 306 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:44:19,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2024-11-14 03:44:19,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 305. [2024-11-14 03:44:19,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 232 states have (on average 1.7974137931034482) internal successors, (417), 290 states have internal predecessors, (417), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-14 03:44:19,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 437 transitions. [2024-11-14 03:44:19,978 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 437 transitions. Word has length 16 [2024-11-14 03:44:19,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:44:19,978 INFO L471 AbstractCegarLoop]: Abstraction has 305 states and 437 transitions. [2024-11-14 03:44:19,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:19,978 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 437 transitions. [2024-11-14 03:44:19,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 03:44:19,979 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:44:19,979 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:44:19,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-14 03:44:19,979 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:44:19,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:44:19,980 INFO L85 PathProgramCache]: Analyzing trace with hash -634809844, now seen corresponding path program 1 times [2024-11-14 03:44:19,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:44:19,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890939853] [2024-11-14 03:44:19,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:19,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:44:19,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:20,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:44:20,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:44:20,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890939853] [2024-11-14 03:44:20,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890939853] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:44:20,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:44:20,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-14 03:44:20,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557913112] [2024-11-14 03:44:20,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:44:20,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:44:20,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:44:20,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:44:20,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:44:20,204 INFO L87 Difference]: Start difference. First operand 305 states and 437 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:20,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:44:20,479 INFO L93 Difference]: Finished difference Result 234 states and 308 transitions. [2024-11-14 03:44:20,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:44:20,480 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-11-14 03:44:20,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:44:20,481 INFO L225 Difference]: With dead ends: 234 [2024-11-14 03:44:20,481 INFO L226 Difference]: Without dead ends: 234 [2024-11-14 03:44:20,482 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-14 03:44:20,482 INFO L432 NwaCegarLoop]: 113 mSDtfsCounter, 23 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:44:20,482 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 526 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:44:20,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2024-11-14 03:44:20,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2024-11-14 03:44:20,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 165 states have (on average 1.7818181818181817) internal successors, (294), 222 states have internal predecessors, (294), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 03:44:20,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 306 transitions. [2024-11-14 03:44:20,490 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 306 transitions. Word has length 17 [2024-11-14 03:44:20,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:44:20,490 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 306 transitions. [2024-11-14 03:44:20,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:20,491 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 306 transitions. [2024-11-14 03:44:20,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 03:44:20,491 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:44:20,491 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:44:20,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-14 03:44:20,491 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:44:20,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:44:20,492 INFO L85 PathProgramCache]: Analyzing trace with hash 624626678, now seen corresponding path program 1 times [2024-11-14 03:44:20,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:44:20,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247659024] [2024-11-14 03:44:20,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:20,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:44:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:44:20,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:44:20,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247659024] [2024-11-14 03:44:20,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247659024] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:44:20,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:44:20,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:44:20,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417557893] [2024-11-14 03:44:20,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:44:20,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:44:20,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:44:20,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:44:20,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:44:20,585 INFO L87 Difference]: Start difference. First operand 232 states and 306 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:20,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:44:20,721 INFO L93 Difference]: Finished difference Result 231 states and 300 transitions. [2024-11-14 03:44:20,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:44:20,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-11-14 03:44:20,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:44:20,723 INFO L225 Difference]: With dead ends: 231 [2024-11-14 03:44:20,723 INFO L226 Difference]: Without dead ends: 231 [2024-11-14 03:44:20,723 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:44:20,723 INFO L432 NwaCegarLoop]: 108 mSDtfsCounter, 16 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:44:20,724 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 178 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:44:20,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-14 03:44:20,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2024-11-14 03:44:20,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 165 states have (on average 1.7454545454545454) internal successors, (288), 221 states have internal predecessors, (288), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 03:44:20,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 300 transitions. [2024-11-14 03:44:20,731 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 300 transitions. Word has length 17 [2024-11-14 03:44:20,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:44:20,732 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 300 transitions. [2024-11-14 03:44:20,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:20,732 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 300 transitions. [2024-11-14 03:44:20,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-14 03:44:20,732 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:44:20,732 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:44:20,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-14 03:44:20,733 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:44:20,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:44:20,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1833419783, now seen corresponding path program 1 times [2024-11-14 03:44:20,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:44:20,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082573748] [2024-11-14 03:44:20,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:20,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:44:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:20,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:44:20,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:44:20,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082573748] [2024-11-14 03:44:20,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082573748] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:44:20,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:44:20,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:44:20,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86906152] [2024-11-14 03:44:20,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:44:20,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:44:20,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:44:20,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:44:20,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:44:20,880 INFO L87 Difference]: Start difference. First operand 231 states and 300 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:21,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:44:21,095 INFO L93 Difference]: Finished difference Result 232 states and 300 transitions. [2024-11-14 03:44:21,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:44:21,096 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-11-14 03:44:21,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:44:21,097 INFO L225 Difference]: With dead ends: 232 [2024-11-14 03:44:21,097 INFO L226 Difference]: Without dead ends: 232 [2024-11-14 03:44:21,097 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:44:21,098 INFO L432 NwaCegarLoop]: 100 mSDtfsCounter, 38 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:44:21,098 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 292 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:44:21,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-11-14 03:44:21,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 230. [2024-11-14 03:44:21,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 165 states have (on average 1.7333333333333334) internal successors, (286), 220 states have internal predecessors, (286), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 03:44:21,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 298 transitions. [2024-11-14 03:44:21,105 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 298 transitions. Word has length 20 [2024-11-14 03:44:21,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:44:21,106 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 298 transitions. [2024-11-14 03:44:21,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:21,106 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 298 transitions. [2024-11-14 03:44:21,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-14 03:44:21,106 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:44:21,106 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:44:21,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-14 03:44:21,107 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:44:21,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:44:21,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1833419782, now seen corresponding path program 1 times [2024-11-14 03:44:21,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:44:21,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425052416] [2024-11-14 03:44:21,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:21,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:44:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:21,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:44:21,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:44:21,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425052416] [2024-11-14 03:44:21,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425052416] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:44:21,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:44:21,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:44:21,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016111629] [2024-11-14 03:44:21,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:44:21,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:44:21,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:44:21,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:44:21,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:44:21,298 INFO L87 Difference]: Start difference. First operand 230 states and 298 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:21,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:44:21,508 INFO L93 Difference]: Finished difference Result 231 states and 298 transitions. [2024-11-14 03:44:21,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:44:21,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-11-14 03:44:21,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:44:21,511 INFO L225 Difference]: With dead ends: 231 [2024-11-14 03:44:21,511 INFO L226 Difference]: Without dead ends: 231 [2024-11-14 03:44:21,512 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:44:21,513 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 34 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:44:21,513 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 310 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:44:21,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-14 03:44:21,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 229. [2024-11-14 03:44:21,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 165 states have (on average 1.7212121212121212) internal successors, (284), 219 states have internal predecessors, (284), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 03:44:21,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 296 transitions. [2024-11-14 03:44:21,523 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 296 transitions. Word has length 20 [2024-11-14 03:44:21,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:44:21,523 INFO L471 AbstractCegarLoop]: Abstraction has 229 states and 296 transitions. [2024-11-14 03:44:21,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:21,523 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 296 transitions. [2024-11-14 03:44:21,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 03:44:21,524 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:44:21,524 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:44:21,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-14 03:44:21,524 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:44:21,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:44:21,525 INFO L85 PathProgramCache]: Analyzing trace with hash -979816357, now seen corresponding path program 1 times [2024-11-14 03:44:21,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:44:21,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193328893] [2024-11-14 03:44:21,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:21,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:44:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:21,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:44:21,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:44:21,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193328893] [2024-11-14 03:44:21,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193328893] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:44:21,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:44:21,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:44:21,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940079657] [2024-11-14 03:44:21,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:44:21,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:44:21,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:44:21,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:44:21,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:44:21,649 INFO L87 Difference]: Start difference. First operand 229 states and 296 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:21,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:44:21,887 INFO L93 Difference]: Finished difference Result 231 states and 295 transitions. [2024-11-14 03:44:21,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:44:21,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-11-14 03:44:21,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:44:21,889 INFO L225 Difference]: With dead ends: 231 [2024-11-14 03:44:21,889 INFO L226 Difference]: Without dead ends: 231 [2024-11-14 03:44:21,889 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:44:21,891 INFO L432 NwaCegarLoop]: 93 mSDtfsCounter, 26 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:44:21,891 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 245 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:44:21,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-14 03:44:21,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 226. [2024-11-14 03:44:21,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 165 states have (on average 1.6848484848484848) internal successors, (278), 216 states have internal predecessors, (278), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 03:44:21,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 290 transitions. [2024-11-14 03:44:21,902 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 290 transitions. Word has length 22 [2024-11-14 03:44:21,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:44:21,902 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 290 transitions. [2024-11-14 03:44:21,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:21,903 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 290 transitions. [2024-11-14 03:44:21,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 03:44:21,904 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:44:21,905 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:44:21,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-14 03:44:21,906 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:44:21,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:44:21,906 INFO L85 PathProgramCache]: Analyzing trace with hash -979816356, now seen corresponding path program 1 times [2024-11-14 03:44:21,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:44:21,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839454199] [2024-11-14 03:44:21,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:21,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:44:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:44:22,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:44:22,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839454199] [2024-11-14 03:44:22,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839454199] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:44:22,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:44:22,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-14 03:44:22,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248265580] [2024-11-14 03:44:22,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:44:22,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 03:44:22,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:44:22,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 03:44:22,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:44:22,276 INFO L87 Difference]: Start difference. First operand 226 states and 290 transitions. Second operand has 8 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:23,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:44:23,018 INFO L93 Difference]: Finished difference Result 294 states and 335 transitions. [2024-11-14 03:44:23,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 03:44:23,019 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-11-14 03:44:23,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:44:23,022 INFO L225 Difference]: With dead ends: 294 [2024-11-14 03:44:23,022 INFO L226 Difference]: Without dead ends: 294 [2024-11-14 03:44:23,022 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-14 03:44:23,023 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 186 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:44:23,023 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 362 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:44:23,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2024-11-14 03:44:23,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 226. [2024-11-14 03:44:23,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 165 states have (on average 1.6666666666666667) internal successors, (275), 216 states have internal predecessors, (275), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 03:44:23,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 287 transitions. [2024-11-14 03:44:23,033 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 287 transitions. Word has length 22 [2024-11-14 03:44:23,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:44:23,033 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 287 transitions. [2024-11-14 03:44:23,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:23,034 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 287 transitions. [2024-11-14 03:44:23,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-14 03:44:23,035 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:44:23,035 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:44:23,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-14 03:44:23,036 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:44:23,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:44:23,036 INFO L85 PathProgramCache]: Analyzing trace with hash 119804035, now seen corresponding path program 1 times [2024-11-14 03:44:23,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:44:23,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445820883] [2024-11-14 03:44:23,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:23,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:44:23,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:23,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:44:23,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:44:23,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445820883] [2024-11-14 03:44:23,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445820883] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:44:23,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901893380] [2024-11-14 03:44:23,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:23,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:44:23,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:44:23,426 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:44:23,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:44:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:23,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-14 03:44:23,628 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:44:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:44:24,055 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:44:24,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901893380] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:44:24,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:44:24,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 12 [2024-11-14 03:44:24,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113775860] [2024-11-14 03:44:24,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:44:24,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:44:24,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:44:24,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:44:24,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-14 03:44:24,057 INFO L87 Difference]: Start difference. First operand 226 states and 287 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 03:44:24,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:44:24,360 INFO L93 Difference]: Finished difference Result 227 states and 286 transitions. [2024-11-14 03:44:24,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:44:24,364 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2024-11-14 03:44:24,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:44:24,366 INFO L225 Difference]: With dead ends: 227 [2024-11-14 03:44:24,366 INFO L226 Difference]: Without dead ends: 227 [2024-11-14 03:44:24,366 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-11-14 03:44:24,368 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 153 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:44:24,368 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 176 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:44:24,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-11-14 03:44:24,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2024-11-14 03:44:24,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 165 states have (on average 1.6424242424242423) internal successors, (271), 214 states have internal predecessors, (271), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 03:44:24,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 283 transitions. [2024-11-14 03:44:24,376 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 283 transitions. Word has length 33 [2024-11-14 03:44:24,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:44:24,377 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 283 transitions. [2024-11-14 03:44:24,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 03:44:24,378 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 283 transitions. [2024-11-14 03:44:24,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-14 03:44:24,378 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:44:24,378 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:44:24,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:44:24,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:44:24,580 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:44:24,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:44:24,580 INFO L85 PathProgramCache]: Analyzing trace with hash 22614487, now seen corresponding path program 1 times [2024-11-14 03:44:24,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:44:24,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776726779] [2024-11-14 03:44:24,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:24,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:44:24,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:25,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:44:25,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:44:25,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776726779] [2024-11-14 03:44:25,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776726779] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:44:25,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796850302] [2024-11-14 03:44:25,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:25,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:44:25,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:44:25,012 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:44:25,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:44:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:25,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 03:44:25,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:44:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:44:25,622 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:44:25,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796850302] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:44:25,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:44:25,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 12 [2024-11-14 03:44:25,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082429115] [2024-11-14 03:44:25,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:44:25,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:44:25,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:44:25,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:44:25,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-11-14 03:44:25,624 INFO L87 Difference]: Start difference. First operand 224 states and 283 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:25,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:44:25,851 INFO L93 Difference]: Finished difference Result 225 states and 283 transitions. [2024-11-14 03:44:25,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:44:25,852 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2024-11-14 03:44:25,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:44:25,853 INFO L225 Difference]: With dead ends: 225 [2024-11-14 03:44:25,853 INFO L226 Difference]: Without dead ends: 225 [2024-11-14 03:44:25,854 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-14 03:44:25,854 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 211 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:44:25,855 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 203 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:44:25,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-11-14 03:44:25,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2024-11-14 03:44:25,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 165 states have (on average 1.6303030303030304) internal successors, (269), 213 states have internal predecessors, (269), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 03:44:25,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 281 transitions. [2024-11-14 03:44:25,862 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 281 transitions. Word has length 33 [2024-11-14 03:44:25,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:44:25,862 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 281 transitions. [2024-11-14 03:44:25,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:44:25,862 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 281 transitions. [2024-11-14 03:44:25,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 03:44:25,863 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:44:25,863 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:44:25,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 03:44:26,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:44:26,064 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:44:26,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:44:26,064 INFO L85 PathProgramCache]: Analyzing trace with hash -581037498, now seen corresponding path program 1 times [2024-11-14 03:44:26,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:44:26,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16454159] [2024-11-14 03:44:26,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:26,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:44:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:44:26,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:44:26,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16454159] [2024-11-14 03:44:26,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16454159] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:44:26,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21579822] [2024-11-14 03:44:26,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:26,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:44:26,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:44:26,455 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:44:26,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:44:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:26,666 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-14 03:44:26,670 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:44:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:44:26,999 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:44:26,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21579822] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:44:26,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:44:26,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 14 [2024-11-14 03:44:26,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010612533] [2024-11-14 03:44:27,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:44:27,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:44:27,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:44:27,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:44:27,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-14 03:44:27,002 INFO L87 Difference]: Start difference. First operand 223 states and 281 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 03:44:27,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:44:27,281 INFO L93 Difference]: Finished difference Result 225 states and 282 transitions. [2024-11-14 03:44:27,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 03:44:27,281 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2024-11-14 03:44:27,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:44:27,284 INFO L225 Difference]: With dead ends: 225 [2024-11-14 03:44:27,284 INFO L226 Difference]: Without dead ends: 225 [2024-11-14 03:44:27,285 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-11-14 03:44:27,285 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 118 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:44:27,285 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 202 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:44:27,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-11-14 03:44:27,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2024-11-14 03:44:27,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 165 states have (on average 1.6181818181818182) internal successors, (267), 212 states have internal predecessors, (267), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 03:44:27,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 279 transitions. [2024-11-14 03:44:27,293 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 279 transitions. Word has length 34 [2024-11-14 03:44:27,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:44:27,293 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 279 transitions. [2024-11-14 03:44:27,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 03:44:27,293 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 279 transitions. [2024-11-14 03:44:27,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 03:44:27,294 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:44:27,295 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:44:27,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 03:44:27,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-14 03:44:27,499 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:44:27,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:44:27,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1616556054, now seen corresponding path program 1 times [2024-11-14 03:44:27,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:44:27,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260052375] [2024-11-14 03:44:27,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:27,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:44:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:28,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:44:28,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:44:28,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260052375] [2024-11-14 03:44:28,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260052375] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:44:28,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356794027] [2024-11-14 03:44:28,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:44:28,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:44:28,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:44:28,621 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:44:28,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:44:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:44:28,798 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-14 03:44:28,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:44:29,001 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 03:44:29,243 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2024-11-14 03:44:29,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 03:44:29,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-14 03:44:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:44:29,334 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:44:29,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356794027] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:44:29,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1119247232] [2024-11-14 03:44:29,577 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-14 03:44:29,578 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:44:29,584 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:44:29,590 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:44:29,590 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:44:33,028 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 67 for LOIs [2024-11-14 03:44:33,040 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:44:58,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1119247232] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:44:58,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:44:58,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [11, 10] total 36 [2024-11-14 03:44:58,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31538545] [2024-11-14 03:44:58,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:44:58,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 03:44:58,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:44:58,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 03:44:58,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1266, Unknown=6, NotChecked=0, Total=1482 [2024-11-14 03:44:58,073 INFO L87 Difference]: Start difference. First operand 222 states and 279 transitions. Second operand has 17 states, 16 states have (on average 1.5625) internal successors, (25), 14 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:45:01,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:45:03,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:45:05,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:45:22,918 WARN L286 SmtUtils]: Spent 13.81s on a formula simplification. DAG size of input: 265 DAG size of output: 241 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 03:45:25,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:45:29,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:45:29,156 INFO L93 Difference]: Finished difference Result 254 states and 315 transitions. [2024-11-14 03:45:29,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 03:45:29,157 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 14 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2024-11-14 03:45:29,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:45:29,158 INFO L225 Difference]: With dead ends: 254 [2024-11-14 03:45:29,158 INFO L226 Difference]: Without dead ends: 254 [2024-11-14 03:45:29,159 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 9 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 41.7s TimeCoverageRelationStatistics Valid=220, Invalid=1333, Unknown=7, NotChecked=0, Total=1560 [2024-11-14 03:45:29,159 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 47 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 3 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:45:29,161 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 266 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 633 Invalid, 5 Unknown, 0 Unchecked, 14.9s Time] [2024-11-14 03:45:29,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-11-14 03:45:29,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 240. [2024-11-14 03:45:29,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 182 states have (on average 1.565934065934066) internal successors, (285), 229 states have internal predecessors, (285), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-14 03:45:29,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 299 transitions. [2024-11-14 03:45:29,172 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 299 transitions. Word has length 34 [2024-11-14 03:45:29,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:45:29,173 INFO L471 AbstractCegarLoop]: Abstraction has 240 states and 299 transitions. [2024-11-14 03:45:29,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 14 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:45:29,173 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 299 transitions. [2024-11-14 03:45:29,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 03:45:29,175 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:45:29,176 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:45:29,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 03:45:29,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:45:29,377 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:45:29,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:45:29,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1804461240, now seen corresponding path program 1 times [2024-11-14 03:45:29,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:45:29,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37057188] [2024-11-14 03:45:29,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:45:29,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:45:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:45:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:45:30,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:45:30,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37057188] [2024-11-14 03:45:30,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37057188] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:45:30,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788314426] [2024-11-14 03:45:30,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:45:30,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:45:30,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:45:30,791 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:45:30,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:45:30,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:45:30,984 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-14 03:45:30,990 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:45:31,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 03:45:32,086 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2024-11-14 03:45:32,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 03:45:32,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-14 03:45:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:45:32,231 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:45:32,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788314426] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:45:32,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1932301154] [2024-11-14 03:45:32,796 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-14 03:45:32,796 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:45:32,797 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:45:32,797 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:45:32,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:45:35,214 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 67 for LOIs [2024-11-14 03:45:35,232 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:46:22,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1932301154] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:46:22,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:46:22,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [12, 8] total 37 [2024-11-14 03:46:22,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439717059] [2024-11-14 03:46:22,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:46:22,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 03:46:22,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:46:22,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 03:46:22,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1352, Unknown=10, NotChecked=0, Total=1560 [2024-11-14 03:46:22,609 INFO L87 Difference]: Start difference. First operand 240 states and 299 transitions. Second operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 16 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:46:26,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:46:28,321 WARN L539 Checker$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 03:46:30,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:46:33,719 WARN L539 Checker$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 03:46:53,486 WARN L286 SmtUtils]: Spent 15.47s on a formula simplification. DAG size of input: 265 DAG size of output: 241 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 03:47:19,955 WARN L286 SmtUtils]: Spent 16.85s on a formula simplification. DAG size of input: 257 DAG size of output: 233 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 03:47:22,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:47:28,047 WARN L539 Checker$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 03:47:35,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:47:35,169 INFO L93 Difference]: Finished difference Result 257 states and 318 transitions. [2024-11-14 03:47:35,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 03:47:35,169 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 16 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2024-11-14 03:47:35,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:47:35,171 INFO L225 Difference]: With dead ends: 257 [2024-11-14 03:47:35,171 INFO L226 Difference]: Without dead ends: 257 [2024-11-14 03:47:35,172 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 91.1s TimeCoverageRelationStatistics Valid=225, Invalid=1481, Unknown=16, NotChecked=0, Total=1722 [2024-11-14 03:47:35,172 INFO L432 NwaCegarLoop]: 92 mSDtfsCounter, 38 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 1360 mSolverCounterSat, 2 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1360 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:47:35,173 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 422 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1360 Invalid, 8 Unknown, 0 Unchecked, 30.5s Time] [2024-11-14 03:47:35,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2024-11-14 03:47:35,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 243. [2024-11-14 03:47:35,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 185 states have (on average 1.5567567567567568) internal successors, (288), 232 states have internal predecessors, (288), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-14 03:47:35,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 302 transitions. [2024-11-14 03:47:35,180 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 302 transitions. Word has length 35 [2024-11-14 03:47:35,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:47:35,180 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 302 transitions. [2024-11-14 03:47:35,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 16 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:47:35,181 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 302 transitions. [2024-11-14 03:47:35,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-14 03:47:35,181 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:47:35,181 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:47:35,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-14 03:47:35,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-14 03:47:35,382 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:47:35,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:47:35,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1560648798, now seen corresponding path program 1 times [2024-11-14 03:47:35,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:47:35,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736675337] [2024-11-14 03:47:35,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:47:35,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:47:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:47:37,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:47:37,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:47:37,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736675337] [2024-11-14 03:47:37,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736675337] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:47:37,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456816646] [2024-11-14 03:47:37,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:47:37,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:47:37,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:47:37,020 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:47:37,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:47:37,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:47:37,208 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-14 03:47:37,211 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:47:38,033 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 03:47:38,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 27 treesize of output 22 [2024-11-14 03:47:38,910 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2024-11-14 03:47:38,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 03:47:39,115 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:47:39,115 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 30 treesize of output 12 [2024-11-14 03:47:39,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:47:39,124 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:47:39,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456816646] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:47:39,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1236946991] [2024-11-14 03:47:39,562 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2024-11-14 03:47:39,562 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:47:39,562 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:47:39,562 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:47:39,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:47:42,013 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 218 for LOIs [2024-11-14 03:47:42,069 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:48:35,413 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14586#(and (<= 4 (select |#length| 3)) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length~0#1| 1) (= |~#list~0.offset| 0) (= |ULTIMATE.start_create_item_~cursor#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_create_item_~link_field~0#1| 1) (not (= (select |#valid| (select (select |#memory_$Pointer$.base| 3) 0)) 1)) (= 3 |~#list~0.base|) (<= 0 |ULTIMATE.start_main_~y~1#1|) (= (select (select |#memory_$Pointer$.offset| 3) 0) |ULTIMATE.start_create_item_#t~mem7#1.offset|) (= (select |#valid| 3) 1) (= |ULTIMATE.start_create_item_~item~0#1.offset| 0) (= |ULTIMATE.start_create_item_~h~0#1| 2) (= |ULTIMATE.start_create_item_~cursor#1.base| 3) (<= 0 |ULTIMATE.start_main_~length~0#1|) (= |ULTIMATE.start_create_item_~term_field~0#1| 0) (= |ULTIMATE.start_create_item_~y~0#1| 1) (= |ULTIMATE.start_main_~z~0#1| 0) (<= |ULTIMATE.start_main_~y~1#1| 1) (= 3 |ULTIMATE.start_append_one_~list#1.base|) (= |ULTIMATE.start_append_one_~list#1.offset| 0))' at error location [2024-11-14 03:48:35,413 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:48:35,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:48:35,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2024-11-14 03:48:35,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721986079] [2024-11-14 03:48:35,414 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:48:35,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-14 03:48:35,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:48:35,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-14 03:48:35,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=2063, Unknown=9, NotChecked=0, Total=2352 [2024-11-14 03:48:35,416 INFO L87 Difference]: Start difference. First operand 243 states and 302 transitions. Second operand has 22 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 20 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 03:48:44,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:48:44,319 INFO L93 Difference]: Finished difference Result 541 states and 686 transitions. [2024-11-14 03:48:44,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 03:48:44,320 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 20 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2024-11-14 03:48:44,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:48:44,322 INFO L225 Difference]: With dead ends: 541 [2024-11-14 03:48:44,322 INFO L226 Difference]: Without dead ends: 541 [2024-11-14 03:48:44,323 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 58.3s TimeCoverageRelationStatistics Valid=552, Invalid=3995, Unknown=9, NotChecked=0, Total=4556 [2024-11-14 03:48:44,324 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 757 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:48:44,324 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [757 Valid, 1094 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1549 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2024-11-14 03:48:44,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2024-11-14 03:48:44,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 297. [2024-11-14 03:48:44,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 233 states have (on average 1.5407725321888412) internal successors, (359), 280 states have internal predecessors, (359), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-14 03:48:44,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 381 transitions. [2024-11-14 03:48:44,337 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 381 transitions. Word has length 36 [2024-11-14 03:48:44,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:48:44,337 INFO L471 AbstractCegarLoop]: Abstraction has 297 states and 381 transitions. [2024-11-14 03:48:44,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 20 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 03:48:44,338 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 381 transitions. [2024-11-14 03:48:44,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-14 03:48:44,339 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:48:44,339 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:48:44,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 03:48:44,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-14 03:48:44,543 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:48:44,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:48:44,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1560648799, now seen corresponding path program 1 times [2024-11-14 03:48:44,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:48:44,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493124620] [2024-11-14 03:48:44,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:44,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:48:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:46,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:48:46,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:48:46,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493124620] [2024-11-14 03:48:46,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493124620] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:48:46,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690633637] [2024-11-14 03:48:46,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:46,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:48:46,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:48:46,888 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:48:46,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:48:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:47,058 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-14 03:48:47,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:48:47,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-14 03:48:48,314 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 03:48:48,344 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 03:48:48,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 36 treesize of output 27 [2024-11-14 03:48:48,734 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 21 treesize of output 20 [2024-11-14 03:48:49,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:48:49,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-14 03:48:49,686 INFO L349 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2024-11-14 03:48:49,687 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 17 treesize of output 17 [2024-11-14 03:48:49,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 12 [2024-11-14 03:48:50,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:48:50,146 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:48:51,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690633637] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:48:51,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1483256980] [2024-11-14 03:48:51,569 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2024-11-14 03:48:51,569 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:48:51,570 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:48:51,570 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:48:51,570 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:48:54,789 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 218 for LOIs [2024-11-14 03:48:54,839 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:49:09,888 WARN L286 SmtUtils]: Spent 5.08s on a formula simplification. DAG size of input: 232 DAG size of output: 205 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 03:50:19,749 WARN L286 SmtUtils]: Spent 9.20s on a formula simplification. DAG size of input: 264 DAG size of output: 232 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 03:50:34,281 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15643#(and (<= 4 (select |#length| 3)) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length~0#1| 1) (= |~#list~0.offset| 0) (= |ULTIMATE.start_create_item_~cursor#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= 3 |~#list~0.base|) (<= 0 |ULTIMATE.start_main_~y~1#1|) (= (select |#valid| 3) 1) (= |ULTIMATE.start_create_item_~item~0#1.offset| 0) (= |ULTIMATE.start_create_item_~h~0#1| 2) (= |ULTIMATE.start_create_item_~cursor#1.base| 3) (<= 0 |ULTIMATE.start_main_~length~0#1|) (= |ULTIMATE.start_create_item_~term_field~0#1| 0) (= |ULTIMATE.start_create_item_~y~0#1| 1) (= |ULTIMATE.start_main_~z~0#1| 0) (or (< (+ (select (select |#memory_$Pointer$.offset| 3) 0) 4) 0) (< (select |#length| (select (select |#memory_$Pointer$.base| 3) 0)) (+ (select (select |#memory_$Pointer$.offset| 3) 0) 8))) (<= |ULTIMATE.start_main_~y~1#1| 1) (= 3 |ULTIMATE.start_append_one_~list#1.base|) (= |ULTIMATE.start_append_one_~list#1.offset| 0))' at error location [2024-11-14 03:50:34,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:50:34,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:50:34,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 25 [2024-11-14 03:50:34,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635790658] [2024-11-14 03:50:34,281 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:50:34,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-14 03:50:34,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:50:34,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-14 03:50:34,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=2677, Unknown=23, NotChecked=0, Total=2970 [2024-11-14 03:50:34,283 INFO L87 Difference]: Start difference. First operand 297 states and 381 transitions. Second operand has 26 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 03:50:48,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:50:48,586 INFO L93 Difference]: Finished difference Result 580 states and 740 transitions. [2024-11-14 03:50:48,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-14 03:50:48,587 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2024-11-14 03:50:48,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:50:48,590 INFO L225 Difference]: With dead ends: 580 [2024-11-14 03:50:48,590 INFO L226 Difference]: Without dead ends: 580 [2024-11-14 03:50:48,591 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 108.7s TimeCoverageRelationStatistics Valid=619, Invalid=5364, Unknown=23, NotChecked=0, Total=6006 [2024-11-14 03:50:48,592 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 736 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 2195 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 2214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:50:48,592 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 1207 Invalid, 2214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2195 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2024-11-14 03:50:48,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2024-11-14 03:50:48,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 336. [2024-11-14 03:50:48,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 269 states have (on average 1.5650557620817844) internal successors, (421), 316 states have internal predecessors, (421), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-14 03:50:48,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 447 transitions. [2024-11-14 03:50:48,607 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 447 transitions. Word has length 36 [2024-11-14 03:50:48,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:50:48,608 INFO L471 AbstractCegarLoop]: Abstraction has 336 states and 447 transitions. [2024-11-14 03:50:48,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 03:50:48,608 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 447 transitions. [2024-11-14 03:50:48,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-14 03:50:48,609 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:50:48,609 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:50:48,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 03:50:48,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-14 03:50:48,810 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:50:48,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:50:48,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1135762830, now seen corresponding path program 1 times [2024-11-14 03:50:48,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:50:48,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393980382] [2024-11-14 03:50:48,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:48,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:50:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:48,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 03:50:48,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:50:48,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393980382] [2024-11-14 03:50:48,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393980382] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:50:48,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:50:48,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:50:48,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485151171] [2024-11-14 03:50:48,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:50:48,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:50:48,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:50:48,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:50:48,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:50:48,891 INFO L87 Difference]: Start difference. First operand 336 states and 447 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:50:49,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:50:49,182 INFO L93 Difference]: Finished difference Result 336 states and 444 transitions. [2024-11-14 03:50:49,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:50:49,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2024-11-14 03:50:49,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:50:49,184 INFO L225 Difference]: With dead ends: 336 [2024-11-14 03:50:49,184 INFO L226 Difference]: Without dead ends: 336 [2024-11-14 03:50:49,184 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:50:49,185 INFO L432 NwaCegarLoop]: 106 mSDtfsCounter, 0 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:50:49,185 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 209 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:50:49,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2024-11-14 03:50:49,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 335. [2024-11-14 03:50:49,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 268 states have (on average 1.5559701492537314) internal successors, (417), 315 states have internal predecessors, (417), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-14 03:50:49,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 443 transitions. [2024-11-14 03:50:49,193 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 443 transitions. Word has length 37 [2024-11-14 03:50:49,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:50:49,193 INFO L471 AbstractCegarLoop]: Abstraction has 335 states and 443 transitions. [2024-11-14 03:50:49,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:50:49,193 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 443 transitions. [2024-11-14 03:50:49,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-14 03:50:49,194 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:50:49,194 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:50:49,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-11-14 03:50:49,194 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:50:49,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:50:49,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1475395403, now seen corresponding path program 1 times [2024-11-14 03:50:49,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:50:49,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050229582] [2024-11-14 03:50:49,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:49,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:50:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:50:50,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:50:50,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050229582] [2024-11-14 03:50:50,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050229582] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:50:50,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:50:50,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-14 03:50:50,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993514551] [2024-11-14 03:50:50,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:50:50,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 03:50:50,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:50:50,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 03:50:50,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-11-14 03:50:50,484 INFO L87 Difference]: Start difference. First operand 335 states and 443 transitions. Second operand has 11 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:50:52,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:50:52,813 INFO L93 Difference]: Finished difference Result 470 states and 611 transitions. [2024-11-14 03:50:52,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 03:50:52,814 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2024-11-14 03:50:52,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:50:52,816 INFO L225 Difference]: With dead ends: 470 [2024-11-14 03:50:52,816 INFO L226 Difference]: Without dead ends: 470 [2024-11-14 03:50:52,816 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-14 03:50:52,817 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 295 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:50:52,817 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 395 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-14 03:50:52,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2024-11-14 03:50:52,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 378. [2024-11-14 03:50:52,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 306 states have (on average 1.5326797385620916) internal successors, (469), 354 states have internal predecessors, (469), 17 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-14 03:50:52,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 503 transitions. [2024-11-14 03:50:52,828 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 503 transitions. Word has length 37 [2024-11-14 03:50:52,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:50:52,829 INFO L471 AbstractCegarLoop]: Abstraction has 378 states and 503 transitions. [2024-11-14 03:50:52,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:50:52,829 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 503 transitions. [2024-11-14 03:50:52,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-14 03:50:52,830 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:50:52,830 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:50:52,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-11-14 03:50:52,830 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:50:52,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:50:52,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1475395402, now seen corresponding path program 1 times [2024-11-14 03:50:52,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:50:52,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66336255] [2024-11-14 03:50:52,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:52,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:50:52,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:50:56,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:50:56,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66336255] [2024-11-14 03:50:56,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66336255] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:50:56,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275635314] [2024-11-14 03:50:56,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:56,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:50:56,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:50:56,500 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:50:56,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:50:56,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:56,668 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-14 03:50:56,671 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:50:57,129 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-14 03:50:57,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 14 treesize of output 13 [2024-11-14 03:50:57,221 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 03:50:57,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-14 03:50:58,485 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 03:50:58,528 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 03:50:58,917 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 27 treesize of output 22 [2024-11-14 03:50:58,951 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 21 treesize of output 20 [2024-11-14 03:51:00,219 INFO L349 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2024-11-14 03:51:00,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 13 [2024-11-14 03:51:00,321 INFO L349 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2024-11-14 03:51:00,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 15 [2024-11-14 03:51:00,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:51:00,759 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:51:02,606 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 172 treesize of output 166 [2024-11-14 03:51:02,616 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 316 treesize of output 298 [2024-11-14 03:51:02,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:51:02,736 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 52 treesize of output 46 [2024-11-14 03:51:02,807 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 158 treesize of output 154 [2024-11-14 03:51:02,841 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 322 treesize of output 310 [2024-11-14 03:51:02,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:51:02,959 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 62 treesize of output 58 [2024-11-14 03:51:05,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:51:05,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275635314] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 03:51:05,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:51:05,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [14, 8] total 30 [2024-11-14 03:51:05,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780036816] [2024-11-14 03:51:05,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:51:05,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 03:51:05,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:51:05,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 03:51:05,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2024-11-14 03:51:05,641 INFO L87 Difference]: Start difference. First operand 378 states and 503 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:51:09,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:51:09,286 INFO L93 Difference]: Finished difference Result 459 states and 593 transitions. [2024-11-14 03:51:09,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 03:51:09,286 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2024-11-14 03:51:09,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:51:09,288 INFO L225 Difference]: With dead ends: 459 [2024-11-14 03:51:09,289 INFO L226 Difference]: Without dead ends: 459 [2024-11-14 03:51:09,289 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2024-11-14 03:51:09,290 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 105 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:51:09,290 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 668 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-14 03:51:09,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2024-11-14 03:51:09,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 416. [2024-11-14 03:51:09,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 341 states have (on average 1.5513196480938416) internal successors, (529), 390 states have internal predecessors, (529), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-14 03:51:09,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 567 transitions. [2024-11-14 03:51:09,300 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 567 transitions. Word has length 37 [2024-11-14 03:51:09,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:51:09,301 INFO L471 AbstractCegarLoop]: Abstraction has 416 states and 567 transitions. [2024-11-14 03:51:09,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:51:09,301 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 567 transitions. [2024-11-14 03:51:09,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-14 03:51:09,302 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:51:09,302 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:51:09,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 03:51:09,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:51:09,503 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:51:09,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:51:09,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1475393653, now seen corresponding path program 1 times [2024-11-14 03:51:09,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:51:09,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768212641] [2024-11-14 03:51:09,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:09,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:51:09,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:09,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:51:09,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:51:09,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768212641] [2024-11-14 03:51:09,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768212641] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:51:09,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998003595] [2024-11-14 03:51:09,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:09,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:51:09,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:51:09,645 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:51:09,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:51:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:09,827 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:51:09,829 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:51:10,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:51:10,092 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:51:10,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998003595] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:51:10,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:51:10,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2024-11-14 03:51:10,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722502966] [2024-11-14 03:51:10,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:51:10,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:51:10,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:51:10,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:51:10,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:51:10,093 INFO L87 Difference]: Start difference. First operand 416 states and 567 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:51:10,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:51:10,443 INFO L93 Difference]: Finished difference Result 727 states and 1007 transitions. [2024-11-14 03:51:10,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:51:10,444 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2024-11-14 03:51:10,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:51:10,446 INFO L225 Difference]: With dead ends: 727 [2024-11-14 03:51:10,446 INFO L226 Difference]: Without dead ends: 727 [2024-11-14 03:51:10,446 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 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 03:51:10,446 INFO L432 NwaCegarLoop]: 134 mSDtfsCounter, 202 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:51:10,447 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 236 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:51:10,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2024-11-14 03:51:10,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 468. [2024-11-14 03:51:10,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 393 states have (on average 1.529262086513995) internal successors, (601), 442 states have internal predecessors, (601), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-14 03:51:10,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 639 transitions. [2024-11-14 03:51:10,460 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 639 transitions. Word has length 37 [2024-11-14 03:51:10,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:51:10,460 INFO L471 AbstractCegarLoop]: Abstraction has 468 states and 639 transitions. [2024-11-14 03:51:10,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:51:10,461 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 639 transitions. [2024-11-14 03:51:10,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-14 03:51:10,461 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:51:10,461 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:51:10,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 03:51:10,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:51:10,662 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr63ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:51:10,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:51:10,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1507383868, now seen corresponding path program 1 times [2024-11-14 03:51:10,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:51:10,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931607005] [2024-11-14 03:51:10,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:10,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:51:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:51:13,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:51:13,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931607005] [2024-11-14 03:51:13,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931607005] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:51:13,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310700167] [2024-11-14 03:51:13,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:13,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:51:13,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:51:13,595 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:51:13,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 03:51:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:13,777 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-14 03:51:13,779 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:51:14,675 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 03:51:14,982 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 18 [2024-11-14 03:51:15,593 INFO L349 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2024-11-14 03:51:15,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 13 [2024-11-14 03:51:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:51:15,836 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:51:15,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310700167] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:51:15,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:51:15,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2024-11-14 03:51:15,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908122682] [2024-11-14 03:51:15,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:51:15,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 03:51:15,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:51:15,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 03:51:15,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-11-14 03:51:15,838 INFO L87 Difference]: Start difference. First operand 468 states and 639 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:51:17,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:51:17,373 INFO L93 Difference]: Finished difference Result 564 states and 741 transitions. [2024-11-14 03:51:17,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 03:51:17,374 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2024-11-14 03:51:17,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:51:17,376 INFO L225 Difference]: With dead ends: 564 [2024-11-14 03:51:17,376 INFO L226 Difference]: Without dead ends: 564 [2024-11-14 03:51:17,376 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2024-11-14 03:51:17,377 INFO L432 NwaCegarLoop]: 92 mSDtfsCounter, 324 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:51:17,377 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 586 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 03:51:17,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2024-11-14 03:51:17,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 469. [2024-11-14 03:51:17,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 394 states have (on average 1.5279187817258884) internal successors, (602), 443 states have internal predecessors, (602), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-14 03:51:17,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 640 transitions. [2024-11-14 03:51:17,389 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 640 transitions. Word has length 38 [2024-11-14 03:51:17,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:51:17,389 INFO L471 AbstractCegarLoop]: Abstraction has 469 states and 640 transitions. [2024-11-14 03:51:17,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:51:17,389 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 640 transitions. [2024-11-14 03:51:17,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-14 03:51:17,390 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:51:17,390 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:51:17,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 03:51:17,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-14 03:51:17,591 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:51:17,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:51:17,591 INFO L85 PathProgramCache]: Analyzing trace with hash -51053890, now seen corresponding path program 1 times [2024-11-14 03:51:17,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:51:17,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383363768] [2024-11-14 03:51:17,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:17,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:51:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:19,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:51:19,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:51:19,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383363768] [2024-11-14 03:51:19,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383363768] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:51:19,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090327341] [2024-11-14 03:51:19,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:19,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:51:19,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:51:19,223 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:51:19,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 03:51:19,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:19,407 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-14 03:51:19,409 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:51:19,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-14 03:51:20,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 03:51:20,948 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 03:51:21,236 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 24 treesize of output 19 [2024-11-14 03:51:22,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:51:22,193 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:51:22,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 100 [2024-11-14 03:51:22,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 49 [2024-11-14 03:51:22,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:51:22,806 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:51:23,474 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:51:23,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 67 [2024-11-14 03:51:24,308 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 74 treesize of output 70 [2024-11-14 03:51:24,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:51:24,405 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 03:51:24,410 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 22 treesize of output 18 [2024-11-14 03:51:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:51:25,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090327341] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:51:25,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [678438963] [2024-11-14 03:51:25,843 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2024-11-14 03:51:25,843 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:51:25,843 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:51:25,843 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:51:25,843 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:51:28,704 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 241 for LOIs [2024-11-14 03:51:28,782 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:52:02,628 WARN L286 SmtUtils]: Spent 5.58s on a formula simplification. DAG size of input: 241 DAG size of output: 220 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 03:52:39,413 WARN L286 SmtUtils]: Spent 6.59s on a formula simplification. DAG size of input: 231 DAG size of output: 214 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 03:53:01,716 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22044#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length~0#1| 1) (= |~#list~0.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 8 (select |#length| 3)) (= 3 |ULTIMATE.start_remove_one_~list#1.base|) (= 3 |~#list~0.base|) (= (select |#valid| 3) 1) (exists ((|v_ULTIMATE.start_is_empty_~no_end~0#1_13| Int)) (and (or (and (= (select (select |#memory_$Pointer$.base| 3) 4) 0) (= (select (select |#memory_$Pointer$.offset| 3) 4) 0) (= |v_ULTIMATE.start_is_empty_~no_end~0#1_13| 1)) (and (or (not (= (select (select |#memory_$Pointer$.offset| 3) 4) 0)) (not (= (select (select |#memory_$Pointer$.base| 3) 4) 0))) (= |v_ULTIMATE.start_is_empty_~no_end~0#1_13| 0))) (not (= |ULTIMATE.start_is_empty_~no_beg~0#1| |v_ULTIMATE.start_is_empty_~no_end~0#1_13|)))) (= |ULTIMATE.start_remove_one_~from#1| 0) (<= 0 |ULTIMATE.start_main_~length~0#1|) (= |ULTIMATE.start_remove_one_~list#1.offset| 0) (= |ULTIMATE.start_main_~z~0#1| 0) (or (and (= |ULTIMATE.start_main_~y~1#1| 0) (exists ((|v_ULTIMATE.start_main_#t~nondet33#1_13| Int)) (and (<= |v_ULTIMATE.start_main_#t~nondet33#1_13| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_#t~nondet33#1_13| 2147483648)) (not (= |v_ULTIMATE.start_main_#t~nondet33#1_13| 0)))) (= |ULTIMATE.start_main_~length~0#1| 0)) (and (= |ULTIMATE.start_main_~y~1#1| 1) (exists ((|v_ULTIMATE.start_main_#t~nondet33#1_13| Int)) (and (<= |v_ULTIMATE.start_main_#t~nondet33#1_13| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_#t~nondet33#1_13| 2147483648)) (not (= |v_ULTIMATE.start_main_#t~nondet33#1_13| 0)))))) (<= |#StackHeapBarrier| 3) (or (and (= |ULTIMATE.start_is_empty_~no_beg~0#1| 0) (or (not (= (select (select |#memory_$Pointer$.base| 3) 0) 0)) (not (= (select (select |#memory_$Pointer$.offset| 3) 0) 0)))) (and (= (select (select |#memory_$Pointer$.offset| 3) 0) 0) (= |ULTIMATE.start_is_empty_~no_beg~0#1| 1) (= (select (select |#memory_$Pointer$.base| 3) 0) 0))))' at error location [2024-11-14 03:53:01,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:53:01,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:53:01,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 36 [2024-11-14 03:53:01,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846352005] [2024-11-14 03:53:01,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:53:01,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-14 03:53:01,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:53:01,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-14 03:53:01,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=3931, Unknown=11, NotChecked=0, Total=4290 [2024-11-14 03:53:01,719 INFO L87 Difference]: Start difference. First operand 469 states and 640 transitions. Second operand has 36 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 35 states have internal predecessors, (100), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 03:53:17,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:53:17,660 INFO L93 Difference]: Finished difference Result 588 states and 775 transitions. [2024-11-14 03:53:17,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 03:53:17,661 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 35 states have internal predecessors, (100), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2024-11-14 03:53:17,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:53:17,662 INFO L225 Difference]: With dead ends: 588 [2024-11-14 03:53:17,663 INFO L226 Difference]: Without dead ends: 588 [2024-11-14 03:53:17,664 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1853 ImplicationChecksByTransitivity, 101.0s TimeCoverageRelationStatistics Valid=540, Invalid=5929, Unknown=11, NotChecked=0, Total=6480 [2024-11-14 03:53:17,664 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 612 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 2824 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 1881 SdHoareTripleChecker+Invalid, 2840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:53:17,664 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 1881 Invalid, 2840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2824 Invalid, 0 Unknown, 0 Unchecked, 12.5s Time] [2024-11-14 03:53:17,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2024-11-14 03:53:17,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 463. [2024-11-14 03:53:17,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 388 states have (on average 1.5206185567010309) internal successors, (590), 437 states have internal predecessors, (590), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-14 03:53:17,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 628 transitions. [2024-11-14 03:53:17,678 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 628 transitions. Word has length 39 [2024-11-14 03:53:17,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:53:17,678 INFO L471 AbstractCegarLoop]: Abstraction has 463 states and 628 transitions. [2024-11-14 03:53:17,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 35 states have internal predecessors, (100), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 03:53:17,678 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 628 transitions. [2024-11-14 03:53:17,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-14 03:53:17,679 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:53:17,679 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:53:17,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 03:53:17,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-14 03:53:17,880 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:53:17,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:53:17,880 INFO L85 PathProgramCache]: Analyzing trace with hash 274781405, now seen corresponding path program 1 times [2024-11-14 03:53:17,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:53:17,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272926755] [2024-11-14 03:53:17,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:53:17,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:53:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:53:18,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 03:53:18,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:53:18,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272926755] [2024-11-14 03:53:18,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272926755] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:53:18,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:53:18,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:53:18,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922413768] [2024-11-14 03:53:18,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:53:18,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:53:18,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:53:18,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:53:18,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:53:18,190 INFO L87 Difference]: Start difference. First operand 463 states and 628 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:53:19,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:53:19,183 INFO L93 Difference]: Finished difference Result 460 states and 617 transitions. [2024-11-14 03:53:19,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:53:19,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2024-11-14 03:53:19,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:53:19,185 INFO L225 Difference]: With dead ends: 460 [2024-11-14 03:53:19,185 INFO L226 Difference]: Without dead ends: 460 [2024-11-14 03:53:19,185 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:53:19,186 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 24 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:53:19,186 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 306 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:53:19,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2024-11-14 03:53:19,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 439. [2024-11-14 03:53:19,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 368 states have (on average 1.4891304347826086) internal successors, (548), 413 states have internal predecessors, (548), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-14 03:53:19,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 586 transitions. [2024-11-14 03:53:19,196 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 586 transitions. Word has length 39 [2024-11-14 03:53:19,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:53:19,197 INFO L471 AbstractCegarLoop]: Abstraction has 439 states and 586 transitions. [2024-11-14 03:53:19,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:53:19,197 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 586 transitions. [2024-11-14 03:53:19,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-14 03:53:19,203 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:53:19,203 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:53:19,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-11-14 03:53:19,203 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:53:19,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:53:19,203 INFO L85 PathProgramCache]: Analyzing trace with hash 274781404, now seen corresponding path program 1 times [2024-11-14 03:53:19,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:53:19,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959219555] [2024-11-14 03:53:19,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:53:19,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:53:19,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:53:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 03:53:19,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:53:19,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959219555] [2024-11-14 03:53:19,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959219555] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:53:19,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:53:19,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:53:19,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449562184] [2024-11-14 03:53:19,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:53:19,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:53:19,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:53:19,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:53:19,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:53:19,428 INFO L87 Difference]: Start difference. First operand 439 states and 586 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:53:20,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:53:20,681 INFO L93 Difference]: Finished difference Result 439 states and 584 transitions. [2024-11-14 03:53:20,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:53:20,681 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2024-11-14 03:53:20,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:53:20,683 INFO L225 Difference]: With dead ends: 439 [2024-11-14 03:53:20,683 INFO L226 Difference]: Without dead ends: 439 [2024-11-14 03:53:20,683 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:53:20,684 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 24 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:53:20,684 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 289 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 03:53:20,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2024-11-14 03:53:20,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 438. [2024-11-14 03:53:20,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 367 states have (on average 1.4850136239782017) internal successors, (545), 412 states have internal predecessors, (545), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-14 03:53:20,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 583 transitions. [2024-11-14 03:53:20,694 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 583 transitions. Word has length 39 [2024-11-14 03:53:20,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:53:20,694 INFO L471 AbstractCegarLoop]: Abstraction has 438 states and 583 transitions. [2024-11-14 03:53:20,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:53:20,695 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 583 transitions. [2024-11-14 03:53:20,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-14 03:53:20,696 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:53:20,696 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:53:20,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-11-14 03:53:20,696 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:53:20,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:53:20,697 INFO L85 PathProgramCache]: Analyzing trace with hash -515740016, now seen corresponding path program 1 times [2024-11-14 03:53:20,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:53:20,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685867675] [2024-11-14 03:53:20,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:53:20,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:53:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:53:22,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:53:22,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:53:22,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685867675] [2024-11-14 03:53:22,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685867675] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:53:22,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:53:22,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-14 03:53:22,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872412468] [2024-11-14 03:53:22,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:53:22,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 03:53:22,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:53:22,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 03:53:22,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-14 03:53:22,570 INFO L87 Difference]: Start difference. First operand 438 states and 583 transitions. Second operand has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:53:26,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:53:26,588 INFO L93 Difference]: Finished difference Result 698 states and 910 transitions. [2024-11-14 03:53:26,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 03:53:26,588 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2024-11-14 03:53:26,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:53:26,590 INFO L225 Difference]: With dead ends: 698 [2024-11-14 03:53:26,590 INFO L226 Difference]: Without dead ends: 698 [2024-11-14 03:53:26,590 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2024-11-14 03:53:26,590 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 368 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:53:26,591 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 780 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-14 03:53:26,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2024-11-14 03:53:26,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 588. [2024-11-14 03:53:26,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 508 states have (on average 1.484251968503937) internal successors, (754), 556 states have internal predecessors, (754), 25 states have call successors, (25), 12 states have call predecessors, (25), 12 states have return successors, (25), 19 states have call predecessors, (25), 25 states have call successors, (25) [2024-11-14 03:53:26,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 804 transitions. [2024-11-14 03:53:26,604 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 804 transitions. Word has length 39 [2024-11-14 03:53:26,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:53:26,604 INFO L471 AbstractCegarLoop]: Abstraction has 588 states and 804 transitions. [2024-11-14 03:53:26,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:53:26,605 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 804 transitions. [2024-11-14 03:53:26,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-14 03:53:26,605 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:53:26,606 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:53:26,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-11-14 03:53:26,606 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:53:26,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:53:26,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1582299000, now seen corresponding path program 1 times [2024-11-14 03:53:26,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:53:26,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539310077] [2024-11-14 03:53:26,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:53:26,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:53:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:53:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:53:26,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:53:26,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539310077] [2024-11-14 03:53:26,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539310077] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:53:26,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:53:26,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 03:53:26,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196630008] [2024-11-14 03:53:26,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:53:26,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:53:26,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:53:26,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:53:26,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:53:26,845 INFO L87 Difference]: Start difference. First operand 588 states and 804 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 03:53:28,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:53:28,081 INFO L93 Difference]: Finished difference Result 738 states and 990 transitions. [2024-11-14 03:53:28,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:53:28,081 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2024-11-14 03:53:28,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:53:28,084 INFO L225 Difference]: With dead ends: 738 [2024-11-14 03:53:28,084 INFO L226 Difference]: Without dead ends: 738 [2024-11-14 03:53:28,084 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:53:28,085 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 207 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:53:28,085 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 228 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 03:53:28,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2024-11-14 03:53:28,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 596. [2024-11-14 03:53:28,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 517 states have (on average 1.4680851063829787) internal successors, (759), 562 states have internal predecessors, (759), 27 states have call successors, (27), 13 states have call predecessors, (27), 13 states have return successors, (27), 20 states have call predecessors, (27), 27 states have call successors, (27) [2024-11-14 03:53:28,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 813 transitions. [2024-11-14 03:53:28,098 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 813 transitions. Word has length 40 [2024-11-14 03:53:28,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:53:28,098 INFO L471 AbstractCegarLoop]: Abstraction has 596 states and 813 transitions. [2024-11-14 03:53:28,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 03:53:28,098 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 813 transitions. [2024-11-14 03:53:28,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-14 03:53:28,099 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:53:28,099 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:53:28,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-11-14 03:53:28,099 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:53:28,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:53:28,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1582298999, now seen corresponding path program 1 times [2024-11-14 03:53:28,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:53:28,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499386910] [2024-11-14 03:53:28,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:53:28,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:53:28,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:53:28,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:53:28,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:53:28,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499386910] [2024-11-14 03:53:28,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499386910] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:53:28,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789825928] [2024-11-14 03:53:28,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:53:28,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:53:28,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:53:28,745 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:53:28,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 03:53:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:53:28,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 03:53:28,945 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:53:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:53:30,503 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:53:30,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789825928] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:53:30,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:53:30,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2024-11-14 03:53:30,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701131982] [2024-11-14 03:53:30,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:53:30,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:53:30,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:53:30,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:53:30,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-14 03:53:30,504 INFO L87 Difference]: Start difference. First operand 596 states and 813 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 03:53:31,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:53:31,320 INFO L93 Difference]: Finished difference Result 599 states and 803 transitions. [2024-11-14 03:53:31,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:53:31,320 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2024-11-14 03:53:31,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:53:31,322 INFO L225 Difference]: With dead ends: 599 [2024-11-14 03:53:31,322 INFO L226 Difference]: Without dead ends: 599 [2024-11-14 03:53:31,322 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-14 03:53:31,322 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 188 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:53:31,322 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 152 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:53:31,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2024-11-14 03:53:31,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 593. [2024-11-14 03:53:31,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 517 states have (on average 1.437137330754352) internal successors, (743), 559 states have internal predecessors, (743), 27 states have call successors, (27), 13 states have call predecessors, (27), 13 states have return successors, (27), 20 states have call predecessors, (27), 27 states have call successors, (27) [2024-11-14 03:53:31,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 797 transitions. [2024-11-14 03:53:31,333 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 797 transitions. Word has length 40 [2024-11-14 03:53:31,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:53:31,333 INFO L471 AbstractCegarLoop]: Abstraction has 593 states and 797 transitions. [2024-11-14 03:53:31,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 03:53:31,334 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 797 transitions. [2024-11-14 03:53:31,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-14 03:53:31,334 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:53:31,334 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:53:31,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 03:53:31,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-14 03:53:31,535 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:53:31,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:53:31,535 INFO L85 PathProgramCache]: Analyzing trace with hash -127787365, now seen corresponding path program 1 times [2024-11-14 03:53:31,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:53:31,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665777011] [2024-11-14 03:53:31,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:53:31,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:53:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:53:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:53:33,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:53:33,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665777011] [2024-11-14 03:53:33,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665777011] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:53:33,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:53:33,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-14 03:53:33,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606420838] [2024-11-14 03:53:33,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:53:33,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 03:53:33,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:53:33,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 03:53:33,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-14 03:53:33,687 INFO L87 Difference]: Start difference. First operand 593 states and 797 transitions. Second operand has 11 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 03:53:36,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:53:36,385 INFO L93 Difference]: Finished difference Result 610 states and 815 transitions. [2024-11-14 03:53:36,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 03:53:36,386 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2024-11-14 03:53:36,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:53:36,387 INFO L225 Difference]: With dead ends: 610 [2024-11-14 03:53:36,387 INFO L226 Difference]: Without dead ends: 610 [2024-11-14 03:53:36,387 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2024-11-14 03:53:36,388 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 26 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:53:36,388 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 590 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-14 03:53:36,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2024-11-14 03:53:36,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 605. [2024-11-14 03:53:36,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 529 states have (on average 1.4291115311909264) internal successors, (756), 571 states have internal predecessors, (756), 27 states have call successors, (27), 13 states have call predecessors, (27), 13 states have return successors, (27), 20 states have call predecessors, (27), 27 states have call successors, (27) [2024-11-14 03:53:36,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 810 transitions. [2024-11-14 03:53:36,399 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 810 transitions. Word has length 41 [2024-11-14 03:53:36,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:53:36,400 INFO L471 AbstractCegarLoop]: Abstraction has 605 states and 810 transitions. [2024-11-14 03:53:36,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 03:53:36,400 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 810 transitions. [2024-11-14 03:53:36,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-14 03:53:36,401 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:53:36,401 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:53:36,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-11-14 03:53:36,401 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:53:36,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:53:36,401 INFO L85 PathProgramCache]: Analyzing trace with hash 2069312701, now seen corresponding path program 1 times [2024-11-14 03:53:36,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:53:36,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761376923] [2024-11-14 03:53:36,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:53:36,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:53:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:53:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 03:53:36,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:53:36,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761376923] [2024-11-14 03:53:36,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761376923] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:53:36,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:53:36,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:53:36,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942079445] [2024-11-14 03:53:36,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:53:36,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:53:36,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:53:36,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:53:36,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:53:36,622 INFO L87 Difference]: Start difference. First operand 605 states and 810 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:53:37,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:53:37,964 INFO L93 Difference]: Finished difference Result 615 states and 814 transitions. [2024-11-14 03:53:37,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:53:37,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2024-11-14 03:53:37,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:53:37,967 INFO L225 Difference]: With dead ends: 615 [2024-11-14 03:53:37,967 INFO L226 Difference]: Without dead ends: 615 [2024-11-14 03:53:37,967 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:53:37,968 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 11 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:53:37,968 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 265 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 03:53:37,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2024-11-14 03:53:37,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 603. [2024-11-14 03:53:37,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 529 states have (on average 1.4139886578449905) internal successors, (748), 569 states have internal predecessors, (748), 27 states have call successors, (27), 13 states have call predecessors, (27), 13 states have return successors, (27), 20 states have call predecessors, (27), 27 states have call successors, (27) [2024-11-14 03:53:37,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 802 transitions. [2024-11-14 03:53:37,979 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 802 transitions. Word has length 41 [2024-11-14 03:53:37,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:53:37,979 INFO L471 AbstractCegarLoop]: Abstraction has 603 states and 802 transitions. [2024-11-14 03:53:37,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 03:53:37,979 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 802 transitions. [2024-11-14 03:53:37,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-14 03:53:37,980 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:53:37,980 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:53:37,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-11-14 03:53:37,980 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:53:37,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:53:37,981 INFO L85 PathProgramCache]: Analyzing trace with hash 2069312702, now seen corresponding path program 1 times [2024-11-14 03:53:37,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:53:37,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188455352] [2024-11-14 03:53:37,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:53:37,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:53:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:53:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:53:42,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:53:42,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188455352] [2024-11-14 03:53:42,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188455352] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:53:42,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904255461] [2024-11-14 03:53:42,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:53:42,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:53:42,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:53:42,072 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:53:42,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 03:53:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:53:42,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-14 03:53:42,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:53:43,583 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 03:53:43,604 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 03:53:44,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 25 treesize of output 20 [2024-11-14 03:53:44,038 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 17 treesize of output 17 [2024-11-14 03:53:46,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 18 [2024-11-14 03:53:46,124 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:53:46,125 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 41 treesize of output 17 [2024-11-14 03:53:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:53:46,424 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:53:47,012 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:53:47,013 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 41 treesize of output 45 [2024-11-14 03:53:48,917 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 86 treesize of output 82 [2024-11-14 03:53:50,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:53:50,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904255461] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:53:50,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1386133723] [2024-11-14 03:53:50,365 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2024-11-14 03:53:50,365 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:53:50,365 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:53:50,365 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:53:50,365 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:53:54,744 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 20 for LOIs [2024-11-14 03:53:54,750 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:54:37,492 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31691#(exists ((|v_ULTIMATE.start_create_item_~term_field~0#1_128| Int) (|v_ULTIMATE.start_create_item_~link~0#1.base_62| Int) (|v_ULTIMATE.start_create_item_~link~0#1.offset_60| Int)) (and (<= (+ |ULTIMATE.start_create_item_~cursor#1.offset| 4) (select |#length| |ULTIMATE.start_create_item_~cursor#1.base|)) (= (select |#valid| |ULTIMATE.start_create_item_~cursor#1.base|) 1) (or (< (+ |v_ULTIMATE.start_create_item_~link~0#1.offset_60| (* 4 |v_ULTIMATE.start_create_item_~term_field~0#1_128|)) 0) (< (select |#length| |v_ULTIMATE.start_create_item_~link~0#1.base_62|) (+ |v_ULTIMATE.start_create_item_~link~0#1.offset_60| (* 4 |v_ULTIMATE.start_create_item_~term_field~0#1_128|) 4))) (exists ((|v_ULTIMATE.start_create_item_~link_field~0#1_129| Int) (|v_#memory_int_149| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_202| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_198| (Array Int (Array Int Int)))) (and (<= 1 |#StackHeapBarrier|) (= |~#list~0.offset| 0) (= |ULTIMATE.start_create_item_~cursor#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_202| |ULTIMATE.start_create_item_~item~0#1.base| (store (select |v_#memory_$Pointer$.base_202| |ULTIMATE.start_create_item_~item~0#1.base|) 4 |v_ULTIMATE.start_create_item_~link~0#1.base_62|))) (<= |ULTIMATE.start_main_~y~1#1| 3) (= |v_ULTIMATE.start_create_item_~term_field~0#1_128| 0) (= (select (select |v_#memory_$Pointer$.offset_198| 3) 0) |v_ULTIMATE.start_create_item_~link~0#1.offset_60|) (= 3 |~#list~0.base|) (<= 0 |ULTIMATE.start_main_~y~1#1|) (<= 8 (select |#length| |ULTIMATE.start_create_item_~item~0#1.base|)) (= |ULTIMATE.start_create_item_~item~0#1.offset| 0) (= |#memory_int| (store |v_#memory_int_149| |ULTIMATE.start_create_item_~item~0#1.base| (store (select |v_#memory_int_149| |ULTIMATE.start_create_item_~item~0#1.base|) 4 (select (select |#memory_int| |ULTIMATE.start_create_item_~item~0#1.base|) 4)))) (= |ULTIMATE.start_create_item_~h~0#1| 2) (= (select (select |v_#memory_$Pointer$.base_202| 3) 0) |v_ULTIMATE.start_create_item_~link~0#1.base_62|) (= |ULTIMATE.start_create_item_~cursor#1.base| 3) (<= 0 |ULTIMATE.start_main_~length~0#1|) (= |ULTIMATE.start_main_~z~0#1| 0) (= |v_ULTIMATE.start_create_item_~link_field~0#1_129| 1) (= 3 |ULTIMATE.start_append_one_~list#1.base|) (= |ULTIMATE.start_append_one_~list#1.offset| 0) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_198| |ULTIMATE.start_create_item_~item~0#1.base| (store (select |v_#memory_$Pointer$.offset_198| |ULTIMATE.start_create_item_~item~0#1.base|) 4 |v_ULTIMATE.start_create_item_~link~0#1.offset_60|))))) (or (not (= |v_ULTIMATE.start_create_item_~link~0#1.base_62| 0)) (not (= |v_ULTIMATE.start_create_item_~link~0#1.offset_60| 0))) (= 1 (select |#valid| |ULTIMATE.start_create_item_~item~0#1.base|))))' at error location [2024-11-14 03:54:37,492 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:54:37,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:54:37,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 12] total 43 [2024-11-14 03:54:37,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967981994] [2024-11-14 03:54:37,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:54:37,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-14 03:54:37,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:54:37,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-14 03:54:37,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=4527, Unknown=3, NotChecked=0, Total=4970 [2024-11-14 03:54:37,495 INFO L87 Difference]: Start difference. First operand 603 states and 802 transitions. Second operand has 44 states, 40 states have (on average 2.75) internal successors, (110), 41 states have internal predecessors, (110), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 03:55:09,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:55:09,157 INFO L93 Difference]: Finished difference Result 1331 states and 1657 transitions. [2024-11-14 03:55:09,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-11-14 03:55:09,157 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 40 states have (on average 2.75) internal successors, (110), 41 states have internal predecessors, (110), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 41 [2024-11-14 03:55:09,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:55:09,160 INFO L225 Difference]: With dead ends: 1331 [2024-11-14 03:55:09,160 INFO L226 Difference]: Without dead ends: 1331 [2024-11-14 03:55:09,164 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6808 ImplicationChecksByTransitivity, 69.2s TimeCoverageRelationStatistics Valid=1962, Invalid=18915, Unknown=3, NotChecked=0, Total=20880 [2024-11-14 03:55:09,165 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 1236 mSDsluCounter, 2293 mSDsCounter, 0 mSdLazyCounter, 2630 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1239 SdHoareTripleChecker+Valid, 2380 SdHoareTripleChecker+Invalid, 2750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:55:09,165 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1239 Valid, 2380 Invalid, 2750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2630 Invalid, 0 Unknown, 0 Unchecked, 12.5s Time] [2024-11-14 03:55:09,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2024-11-14 03:55:09,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 766. [2024-11-14 03:55:09,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 681 states have (on average 1.4038179148311307) internal successors, (956), 721 states have internal predecessors, (956), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 27 states have call predecessors, (35), 35 states have call successors, (35) [2024-11-14 03:55:09,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1026 transitions. [2024-11-14 03:55:09,177 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1026 transitions. Word has length 41 [2024-11-14 03:55:09,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:55:09,177 INFO L471 AbstractCegarLoop]: Abstraction has 766 states and 1026 transitions. [2024-11-14 03:55:09,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 40 states have (on average 2.75) internal successors, (110), 41 states have internal predecessors, (110), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 03:55:09,178 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1026 transitions. [2024-11-14 03:55:09,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-14 03:55:09,178 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:55:09,178 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:55:09,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-14 03:55:09,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:55:09,381 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:55:09,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:55:09,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1790484187, now seen corresponding path program 1 times [2024-11-14 03:55:09,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:55:09,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469244492] [2024-11-14 03:55:09,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:55:09,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:55:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:55:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:55:10,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:55:10,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469244492] [2024-11-14 03:55:10,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469244492] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:55:10,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985218817] [2024-11-14 03:55:10,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:55:10,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:55:10,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:55:10,580 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:55:10,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 03:55:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:55:10,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-14 03:55:10,799 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:55:11,824 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 03:55:12,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 27 treesize of output 22 [2024-11-14 03:55:13,240 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2024-11-14 03:55:13,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 24 [2024-11-14 03:55:13,476 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:55:13,477 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 30 treesize of output 12 [2024-11-14 03:55:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 03:55:13,613 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:55:14,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985218817] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:55:14,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1796420055] [2024-11-14 03:55:14,238 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2024-11-14 03:55:14,239 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:55:14,239 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:55:14,239 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:55:14,239 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:55:20,630 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 58 for LOIs [2024-11-14 03:55:20,638 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:56:00,337 WARN L286 SmtUtils]: Spent 5.36s on a formula simplification. DAG size of input: 236 DAG size of output: 212 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 03:56:08,776 WARN L286 SmtUtils]: Spent 6.84s on a formula simplification. DAG size of input: 251 DAG size of output: 223 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 03:56:19,714 WARN L286 SmtUtils]: Spent 6.90s on a formula simplification. DAG size of input: 247 DAG size of output: 219 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 03:56:40,348 WARN L286 SmtUtils]: Spent 16.00s on a formula simplification. DAG size of input: 261 DAG size of output: 228 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 03:56:58,845 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34133#(and (<= (+ |ULTIMATE.start_create_item_~cursor#1.offset| 4) (select |#length| |ULTIMATE.start_create_item_~cursor#1.base|)) (<= |ULTIMATE.start_main_~y~1#1| 3) (<= 0 |ULTIMATE.start_append_one_~list#1.offset|) (= (select |#valid| |ULTIMATE.start_create_item_~cursor#1.base|) 1) (= |ULTIMATE.start_create_item_~link_field~0#1| 1) (<= 0 |ULTIMATE.start_create_item_~cursor#1.offset|) (= |ULTIMATE.start_create_item_~item~0#1.offset| 0) (= |ULTIMATE.start_create_item_~h~0#1| 2) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_create_item_~cursor#1.base|) |ULTIMATE.start_create_item_~cursor#1.offset|) |ULTIMATE.start_create_item_#t~mem7#1.offset|) (= |ULTIMATE.start_create_item_~term_field~0#1| 0) (= |ULTIMATE.start_create_item_~y~0#1| 1) (not (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_item_~cursor#1.base|) |ULTIMATE.start_create_item_~cursor#1.offset|)) 1)) (<= 0 |~#list~0.offset|))' at error location [2024-11-14 03:56:58,845 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:56:58,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:56:58,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2024-11-14 03:56:58,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684301080] [2024-11-14 03:56:58,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:56:58,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-14 03:56:58,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:58,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-14 03:56:58,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2333, Unknown=15, NotChecked=0, Total=2550 [2024-11-14 03:56:58,847 INFO L87 Difference]: Start difference. First operand 766 states and 1026 transitions. Second operand has 22 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 03:57:09,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:09,877 INFO L93 Difference]: Finished difference Result 1161 states and 1509 transitions. [2024-11-14 03:57:09,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-14 03:57:09,878 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 42 [2024-11-14 03:57:09,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:09,885 INFO L225 Difference]: With dead ends: 1161 [2024-11-14 03:57:09,885 INFO L226 Difference]: Without dead ends: 1161 [2024-11-14 03:57:09,886 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 104.5s TimeCoverageRelationStatistics Valid=414, Invalid=4683, Unknown=15, NotChecked=0, Total=5112 [2024-11-14 03:57:09,886 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 406 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:09,887 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 1338 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1513 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2024-11-14 03:57:09,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2024-11-14 03:57:09,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 874. [2024-11-14 03:57:09,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 781 states have (on average 1.4058898847631243) internal successors, (1098), 820 states have internal predecessors, (1098), 40 states have call successors, (40), 20 states have call predecessors, (40), 20 states have return successors, (40), 33 states have call predecessors, (40), 40 states have call successors, (40) [2024-11-14 03:57:09,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1178 transitions. [2024-11-14 03:57:09,911 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1178 transitions. Word has length 42 [2024-11-14 03:57:09,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:09,911 INFO L471 AbstractCegarLoop]: Abstraction has 874 states and 1178 transitions. [2024-11-14 03:57:09,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 03:57:09,914 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1178 transitions. [2024-11-14 03:57:09,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-14 03:57:09,915 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:09,915 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:57:09,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 03:57:10,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-14 03:57:10,116 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2024-11-14 03:57:10,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:10,116 INFO L85 PathProgramCache]: Analyzing trace with hash -187195347, now seen corresponding path program 1 times [2024-11-14 03:57:10,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:10,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138995230] [2024-11-14 03:57:10,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:10,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:10,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:57:16,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:16,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138995230] [2024-11-14 03:57:16,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138995230] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:57:16,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626492929] [2024-11-14 03:57:16,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:16,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:57:16,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:57:16,459 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:57:16,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d34143e-efed-41eb-b3c0-cce9d472e6bb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 03:57:16,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:16,689 INFO L255 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-14 03:57:16,694 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:57:17,405 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 03:57:17,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-14 03:57:17,973 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 03:57:18,013 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 03:57:18,653 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 25 treesize of output 13 [2024-11-14 03:57:18,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-14 03:57:18,994 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 29 treesize of output 13 [2024-11-14 03:57:19,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-14 03:57:19,437 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 03:57:19,465 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 03:57:19,937 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 21 treesize of output 20 [2024-11-14 03:57:19,967 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 21 treesize of output 20 [2024-11-14 03:57:20,550 INFO L349 Elim1Store]: treesize reduction 57, result has 18.6 percent of original size [2024-11-14 03:57:20,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 53 [2024-11-14 03:57:20,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 53 [2024-11-14 03:57:23,069 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 03:57:23,121 INFO L349 Elim1Store]: treesize reduction 78, result has 3.7 percent of original size [2024-11-14 03:57:23,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 143 treesize of output 76 [2024-11-14 03:57:23,159 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-14 03:57:23,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 33 [2024-11-14 03:57:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:57:23,445 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:57:27,279 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base|)) (.cse2 (+ |c_ULTIMATE.start_append_one_~list#1.offset| 4)) (.cse6 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|)) (.cse4 (+ |c_ULTIMATE.start_create_item_~item~0#1.offset| 8))) (and (forall ((v_ArrVal_1556 (Array Int Int))) (or (forall ((v_ArrVal_1559 (Array Int Int)) (v_ArrVal_1560 (Array Int Int)) (v_ArrVal_1557 Int)) (= (select (let ((.cse0 (let ((.cse1 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store .cse3 .cse4 v_ArrVal_1557)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1559))) (store .cse1 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse1 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse2 |c_ULTIMATE.start_create_item_~item~0#1.base|))))) (select .cse0 (select (select .cse0 |c_~#list~0.base|) |c_~#list~0.offset|))) (+ (select (select (let ((.cse5 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1556) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1560))) (store .cse5 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse5 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|) .cse2 |c_ULTIMATE.start_create_item_~item~0#1.offset|))) |c_~#list~0.base|) |c_~#list~0.offset|) 4)) 0)) (not (= (store .cse6 .cse4 (select v_ArrVal_1556 .cse4)) v_ArrVal_1556)))) (forall ((v_ArrVal_1556 (Array Int Int))) (or (forall ((v_ArrVal_1559 (Array Int Int)) (v_ArrVal_1560 (Array Int Int)) (v_ArrVal_1557 Int)) (= (let ((.cse7 (let ((.cse9 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1556) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1560))) (store .cse9 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse9 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|) .cse2 |c_ULTIMATE.start_create_item_~item~0#1.offset|))))) (select (select .cse7 (select (select (let ((.cse8 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store .cse3 .cse4 v_ArrVal_1557)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1559))) (store .cse8 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse8 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse2 |c_ULTIMATE.start_create_item_~item~0#1.base|))) |c_~#list~0.base|) |c_~#list~0.offset|)) (+ (select (select .cse7 |c_~#list~0.base|) |c_~#list~0.offset|) 4))) 0)) (not (= (store .cse6 .cse4 (select v_ArrVal_1556 .cse4)) v_ArrVal_1556)))))) is different from false [2024-11-14 03:57:27,471 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (= 2 |c_ULTIMATE.start_create_item_~term_field~0#1|))) (let ((.cse5 (+ |c_ULTIMATE.start_create_item_~item~0#1.offset| (* |c_ULTIMATE.start_create_item_~term_field~0#1| 4))) (.cse9 (not .cse0)) (.cse4 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base|)) (.cse3 (+ |c_ULTIMATE.start_append_one_~list#1.offset| 4)) (.cse8 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|)) (.cse6 (+ |c_ULTIMATE.start_create_item_~item~0#1.offset| 8))) (and (or .cse0 (forall ((v_ArrVal_1559 (Array Int Int)) (|ULTIMATE.start_create_item_#t~ite15#1.base| Int) (v_ArrVal_1556 (Array Int Int)) (v_ArrVal_1560 (Array Int Int)) (v_ArrVal_1557 Int)) (or (= (select (let ((.cse1 (let ((.cse2 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse4 .cse5 |ULTIMATE.start_create_item_#t~ite15#1.base|) .cse6 v_ArrVal_1557)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1559))) (store .cse2 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse2 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse3 |c_ULTIMATE.start_create_item_~item~0#1.base|))))) (select .cse1 (select (select .cse1 |c_~#list~0.base|) |c_~#list~0.offset|))) (+ (select (select (let ((.cse7 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1556) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1560))) (store .cse7 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse7 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|) .cse3 |c_ULTIMATE.start_create_item_~item~0#1.offset|))) |c_~#list~0.base|) |c_~#list~0.offset|) 4)) 0) (not (= (store (store .cse8 .cse5 (select v_ArrVal_1556 .cse5)) .cse6 (select v_ArrVal_1556 .cse6)) v_ArrVal_1556))))) (or .cse9 (forall ((v_ArrVal_1559 (Array Int Int)) (v_ArrVal_1556 (Array Int Int)) (v_ArrVal_1560 (Array Int Int)) (v_ArrVal_1557 Int)) (or (= (let ((.cse10 (let ((.cse12 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1556) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1560))) (store .cse12 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse12 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|) .cse3 |c_ULTIMATE.start_create_item_~item~0#1.offset|))))) (select (select .cse10 (select (select (let ((.cse11 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store .cse4 .cse6 v_ArrVal_1557)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1559))) (store .cse11 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse11 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse3 |c_ULTIMATE.start_create_item_~item~0#1.base|))) |c_~#list~0.base|) |c_~#list~0.offset|)) (+ (select (select .cse10 |c_~#list~0.base|) |c_~#list~0.offset|) 4))) 0) (not (= (store .cse8 .cse6 (select v_ArrVal_1556 .cse6)) v_ArrVal_1556))))) (or .cse0 (forall ((v_ArrVal_1559 (Array Int Int)) (|ULTIMATE.start_create_item_#t~ite15#1.base| Int) (v_ArrVal_1556 (Array Int Int)) (v_ArrVal_1560 (Array Int Int)) (v_ArrVal_1557 Int)) (or (= (let ((.cse13 (let ((.cse15 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1556) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1560))) (store .cse15 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse15 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|) .cse3 |c_ULTIMATE.start_create_item_~item~0#1.offset|))))) (select (select .cse13 (select (select (let ((.cse14 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (store .cse4 .cse5 |ULTIMATE.start_create_item_#t~ite15#1.base|) .cse6 v_ArrVal_1557)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1559))) (store .cse14 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse14 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse3 |c_ULTIMATE.start_create_item_~item~0#1.base|))) |c_~#list~0.base|) |c_~#list~0.offset|)) (+ (select (select .cse13 |c_~#list~0.base|) |c_~#list~0.offset|) 4))) 0) (not (= (store (store .cse8 .cse5 (select v_ArrVal_1556 .cse5)) .cse6 (select v_ArrVal_1556 .cse6)) v_ArrVal_1556))))) (or .cse9 (forall ((v_ArrVal_1559 (Array Int Int)) (v_ArrVal_1556 (Array Int Int)) (v_ArrVal_1560 (Array Int Int)) (v_ArrVal_1557 Int)) (or (= (select (let ((.cse16 (let ((.cse17 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store .cse4 .cse6 v_ArrVal_1557)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1559))) (store .cse17 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse17 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse3 |c_ULTIMATE.start_create_item_~item~0#1.base|))))) (select .cse16 (select (select .cse16 |c_~#list~0.base|) |c_~#list~0.offset|))) (+ (select (select (let ((.cse18 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_1556) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1560))) (store .cse18 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse18 |c_ULTIMATE.start_append_one_~list#1.base|) |c_ULTIMATE.start_append_one_~list#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|) .cse3 |c_ULTIMATE.start_create_item_~item~0#1.offset|))) |c_~#list~0.base|) |c_~#list~0.offset|) 4)) 0) (not (= (store .cse8 .cse6 (select v_ArrVal_1556 .cse6)) v_ArrVal_1556)))))))) is different from false [2024-11-14 03:57:29,577 INFO L349 Elim1Store]: treesize reduction 16, result has 63.6 percent of original size [2024-11-14 03:57:29,578 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 2 case distinctions, treesize of input 120 treesize of output 114 [2024-11-14 03:57:29,976 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:57:29,977 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 504604 treesize of output 481231 [2024-11-14 03:57:30,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:57:30,487 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 110658 treesize of output 106170 [2024-11-14 03:57:32,860 INFO L349 Elim1Store]: treesize reduction 158, result has 66.9 percent of original size [2024-11-14 03:57:32,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 22686 treesize of output 20578 [2024-11-14 03:57:34,241 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 19615 treesize of output 19143 [2024-11-14 03:57:35,288 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 4