./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/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_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/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_597f98c5-3eeb-4326-ab1a-edb5808115ea/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 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:48:06,751 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:48:06,832 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-14 03:48:06,838 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:48:06,841 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:48:06,864 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:48:06,864 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:48:06,865 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:48:06,865 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:48:06,865 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:48:06,865 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:48:06,865 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:48:06,865 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:48:06,865 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:48:06,866 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:48:06,866 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:48:06,866 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:48:06,866 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:48:06,866 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:48:06,866 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:48:06,866 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:48:06,866 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:48:06,867 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-14 03:48:06,867 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-14 03:48:06,867 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:48:06,867 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:48:06,867 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:48:06,867 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:48:06,867 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:48:06,867 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-14 03:48:06,868 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-14 03:48:06,868 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-14 03:48:06,868 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:48:06,868 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 03:48:06,868 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:48:06,868 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 03:48:06,868 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:48:06,868 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:48:06,868 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:48:06,868 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:48:06,868 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:48:06,869 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:48:06,869 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:48:06,870 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:48:06,870 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:48:06,871 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:48:06,871 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:48:06,871 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:48:06,871 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:48:06,871 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_597f98c5-3eeb-4326-ab1a-edb5808115ea/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 -> 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 [2024-11-14 03:48:07,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:48:07,243 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:48:07,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:48:07,248 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:48:07,249 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:48:07,251 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i Unable to find full path for "g++" [2024-11-14 03:48:09,112 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:48:09,534 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:48:09,535 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2024-11-14 03:48:09,549 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/data/4817badde/2245764f006d4856ad763e344da4622c/FLAGd35be3e31 [2024-11-14 03:48:09,563 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/data/4817badde/2245764f006d4856ad763e344da4622c [2024-11-14 03:48:09,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:48:09,566 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:48:09,568 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:48:09,568 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:48:09,572 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:48:09,573 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:48:09" (1/1) ... [2024-11-14 03:48:09,577 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a0ce71f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:48:09, skipping insertion in model container [2024-11-14 03:48:09,577 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:48:09" (1/1) ... [2024-11-14 03:48:09,605 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:48:10,038 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:48:10,050 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:48:10,114 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:48:10,140 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:48:10,141 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:48:10 WrapperNode [2024-11-14 03:48:10,141 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:48:10,142 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:48:10,142 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:48:10,142 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:48:10,148 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:48:10" (1/1) ... [2024-11-14 03:48:10,169 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:48:10" (1/1) ... [2024-11-14 03:48:10,202 INFO L138 Inliner]: procedures = 129, calls = 34, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 131 [2024-11-14 03:48:10,202 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:48:10,203 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:48:10,203 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:48:10,203 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:48:10,211 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:48:10" (1/1) ... [2024-11-14 03:48:10,212 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:48:10" (1/1) ... [2024-11-14 03:48:10,216 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:48:10" (1/1) ... [2024-11-14 03:48:10,216 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:48:10" (1/1) ... [2024-11-14 03:48:10,231 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:48:10" (1/1) ... [2024-11-14 03:48:10,238 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:48:10" (1/1) ... [2024-11-14 03:48:10,244 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:48:10" (1/1) ... [2024-11-14 03:48:10,245 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:48:10" (1/1) ... [2024-11-14 03:48:10,250 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:48:10,251 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:48:10,251 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:48:10,252 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:48:10,253 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:48:10" (1/1) ... [2024-11-14 03:48:10,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:48:10,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:48:10,294 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:48:10,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:48:10,323 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2024-11-14 03:48:10,323 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2024-11-14 03:48:10,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-14 03:48:10,323 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2024-11-14 03:48:10,323 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2024-11-14 03:48:10,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:48:10,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 03:48:10,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-14 03:48:10,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-14 03:48:10,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 03:48:10,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2024-11-14 03:48:10,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:48:10,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:48:10,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:48:10,480 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:48:10,482 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:48:10,512 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2024-11-14 03:48:10,834 INFO L? ?]: Removed 89 outVars from TransFormulas that were not future-live. [2024-11-14 03:48:10,835 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:48:10,938 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:48:10,938 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-14 03:48:10,939 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:48:10 BoogieIcfgContainer [2024-11-14 03:48:10,939 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:48:10,942 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:48:10,942 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:48:10,953 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:48:10,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:48:09" (1/3) ... [2024-11-14 03:48:10,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e549e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:48:10, skipping insertion in model container [2024-11-14 03:48:10,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:48:10" (2/3) ... [2024-11-14 03:48:10,956 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e549e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:48:10, skipping insertion in model container [2024-11-14 03:48:10,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:48:10" (3/3) ... [2024-11-14 03:48:10,957 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-2.i [2024-11-14 03:48:10,975 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:48:10,978 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG sll_nondet_insert-2.i that has 3 procedures, 74 locations, 1 initial locations, 6 loop locations, and 25 error locations. [2024-11-14 03:48:11,045 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:48:11,077 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;@1ce2cc57, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:48:11,077 INFO L334 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2024-11-14 03:48:11,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 41 states have (on average 1.951219512195122) internal successors, (80), 67 states have internal predecessors, (80), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:48:11,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 03:48:11,108 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:48:11,109 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:48:11,110 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:48:11,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:48:11,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1065371151, now seen corresponding path program 1 times [2024-11-14 03:48:11,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:48:11,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977516238] [2024-11-14 03:48:11,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:11,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:48:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:11,403 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 03:48:11,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:48:11,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977516238] [2024-11-14 03:48:11,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977516238] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:48:11,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:48:11,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:48:11,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738663179] [2024-11-14 03:48:11,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:48:11,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-14 03:48:11,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:48:11,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-14 03:48:11,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 03:48:11,440 INFO L87 Difference]: Start difference. First operand has 73 states, 41 states have (on average 1.951219512195122) internal successors, (80), 67 states have internal predecessors, (80), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 03:48:11,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:48:11,514 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2024-11-14 03:48:11,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-14 03:48:11,518 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 11 [2024-11-14 03:48:11,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:48:11,525 INFO L225 Difference]: With dead ends: 72 [2024-11-14 03:48:11,526 INFO L226 Difference]: Without dead ends: 67 [2024-11-14 03:48:11,528 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 03:48:11,533 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:48:11,535 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:48:11,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-14 03:48:11,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-14 03:48:11,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 62 states have internal predecessors, (69), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:48:11,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2024-11-14 03:48:11,575 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 11 [2024-11-14 03:48:11,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:48:11,575 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2024-11-14 03:48:11,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 03:48:11,576 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2024-11-14 03:48:11,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-14 03:48:11,577 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:48:11,577 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:48:11,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:48:11,577 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:48:11,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:48:11,578 INFO L85 PathProgramCache]: Analyzing trace with hash -472986569, now seen corresponding path program 1 times [2024-11-14 03:48:11,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:48:11,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385179592] [2024-11-14 03:48:11,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:11,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:48:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:11,783 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 03:48:11,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:48:11,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385179592] [2024-11-14 03:48:11,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385179592] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:48:11,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:48:11,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:48:11,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979314584] [2024-11-14 03:48:11,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:48:11,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:48:11,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:48:11,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:48:11,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:48:11,786 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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 03:48:11,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:48:11,903 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2024-11-14 03:48:11,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:48:11,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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 03:48:11,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:48:11,906 INFO L225 Difference]: With dead ends: 66 [2024-11-14 03:48:11,906 INFO L226 Difference]: Without dead ends: 66 [2024-11-14 03:48:11,906 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 03:48:11,908 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 0 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:48:11,908 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 96 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:48:11,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-14 03:48:11,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-11-14 03:48:11,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 61 states have internal predecessors, (68), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:48:11,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2024-11-14 03:48:11,916 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 12 [2024-11-14 03:48:11,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:48:11,917 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2024-11-14 03:48:11,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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 03:48:11,918 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2024-11-14 03:48:11,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-14 03:48:11,918 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:48:11,918 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:48:11,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 03:48:11,919 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:48:11,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:48:11,919 INFO L85 PathProgramCache]: Analyzing trace with hash -472986568, now seen corresponding path program 1 times [2024-11-14 03:48:11,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:48:11,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629442946] [2024-11-14 03:48:11,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:11,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:48:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:12,072 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 03:48:12,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:48:12,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629442946] [2024-11-14 03:48:12,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629442946] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:48:12,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:48:12,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:48:12,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815331518] [2024-11-14 03:48:12,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:48:12,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:48:12,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:48:12,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:48:12,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:48:12,075 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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 03:48:12,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:48:12,188 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2024-11-14 03:48:12,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:48:12,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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 03:48:12,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:48:12,191 INFO L225 Difference]: With dead ends: 65 [2024-11-14 03:48:12,191 INFO L226 Difference]: Without dead ends: 65 [2024-11-14 03:48:12,191 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 03:48:12,192 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:48:12,192 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 99 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:48:12,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-14 03:48:12,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-11-14 03:48:12,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 38 states have (on average 1.763157894736842) internal successors, (67), 60 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:48:12,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2024-11-14 03:48:12,204 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 12 [2024-11-14 03:48:12,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:48:12,204 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2024-11-14 03:48:12,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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 03:48:12,205 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2024-11-14 03:48:12,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-14 03:48:12,206 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:48:12,206 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:48:12,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 03:48:12,206 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:48:12,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:48:12,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1785275454, now seen corresponding path program 1 times [2024-11-14 03:48:12,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:48:12,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194904171] [2024-11-14 03:48:12,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:12,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:48:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:12,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:48:12,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:48:12,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194904171] [2024-11-14 03:48:12,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194904171] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:48:12,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14108052] [2024-11-14 03:48:12,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:12,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:48:12,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:48:12,422 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:48:12,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:48:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:12,526 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 03:48:12,533 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:48:12,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:48:12,668 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:48:12,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14108052] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:48:12,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:48:12,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2024-11-14 03:48:12,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700563249] [2024-11-14 03:48:12,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:48:12,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:48:12,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:48:12,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:48:12,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-14 03:48:12,670 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 03:48:12,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:48:12,854 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2024-11-14 03:48:12,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:48:12,854 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 20 [2024-11-14 03:48:12,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:48:12,855 INFO L225 Difference]: With dead ends: 67 [2024-11-14 03:48:12,855 INFO L226 Difference]: Without dead ends: 67 [2024-11-14 03:48:12,856 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-14 03:48:12,856 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:48:12,857 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 296 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:48:12,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-14 03:48:12,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-14 03:48:12,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 40 states have (on average 1.725) internal successors, (69), 62 states have internal predecessors, (69), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:48:12,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2024-11-14 03:48:12,869 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 20 [2024-11-14 03:48:12,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:48:12,869 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2024-11-14 03:48:12,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 03:48:12,870 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2024-11-14 03:48:12,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-14 03:48:12,870 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:48:12,870 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:48:12,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:48:13,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:48:13,071 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:48:13,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:48:13,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1837258746, now seen corresponding path program 1 times [2024-11-14 03:48:13,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:48:13,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361538096] [2024-11-14 03:48:13,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:13,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:48:13,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:13,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:48:13,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:48:13,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361538096] [2024-11-14 03:48:13,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361538096] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:48:13,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242609729] [2024-11-14 03:48:13,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:13,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:48:13,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:48:13,343 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:48:13,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:48:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:13,453 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 03:48:13,456 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:48:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:48:13,565 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:48:13,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:48:13,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242609729] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:48:13,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1074152479] [2024-11-14 03:48:13,838 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 03:48:13,839 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:48:13,843 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:48:13,849 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:48:13,849 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:48:15,080 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 47 for LOIs [2024-11-14 03:48:15,210 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:48:16,766 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '841#(and (= |ULTIMATE.start_main_~len~2#1| 2) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~k~0#1| 0) (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_31| Int)) (and (not (= (select |#valid| |v_ULTIMATE.start_main_~#s~0#1.base_31|) 1)) (<= 2 |v_ULTIMATE.start_main_~#s~0#1.base_31|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~#s~0#1.base_31|) 0) 0))) (= |ULTIMATE.start_main_~#s~0#1.offset| 0))' at error location [2024-11-14 03:48:16,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:48:16,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:48:16,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2024-11-14 03:48:16,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513023241] [2024-11-14 03:48:16,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:48:16,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-14 03:48:16,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:48:16,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-14 03:48:16,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2024-11-14 03:48:16,770 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:48:17,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:48:17,133 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2024-11-14 03:48:17,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 03:48:17,134 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 24 [2024-11-14 03:48:17,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:48:17,136 INFO L225 Difference]: With dead ends: 85 [2024-11-14 03:48:17,137 INFO L226 Difference]: Without dead ends: 85 [2024-11-14 03:48:17,137 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2024-11-14 03:48:17,138 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 7 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:48:17,139 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 452 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:48:17,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-14 03:48:17,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 71. [2024-11-14 03:48:17,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 44 states have (on average 1.6590909090909092) internal successors, (73), 66 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:48:17,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2024-11-14 03:48:17,146 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 24 [2024-11-14 03:48:17,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:48:17,146 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2024-11-14 03:48:17,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:48:17,146 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2024-11-14 03:48:17,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-14 03:48:17,147 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:48:17,147 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:48:17,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 03:48:17,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:48:17,351 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:48:17,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:48:17,352 INFO L85 PathProgramCache]: Analyzing trace with hash 354635190, now seen corresponding path program 2 times [2024-11-14 03:48:17,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:48:17,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538396885] [2024-11-14 03:48:17,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:17,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:48:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:48:17,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:48:17,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538396885] [2024-11-14 03:48:17,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538396885] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:48:17,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130857894] [2024-11-14 03:48:17,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:48:17,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:48:17,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:48:17,599 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:48:17,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:48:17,713 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 03:48:17,713 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:48:17,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 03:48:17,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:48:17,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 03:48:17,804 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-14 03:48:17,805 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 19 treesize of output 16 [2024-11-14 03:48:17,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:48:17,842 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 03:48:17,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:48:17,895 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:48:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:48:18,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130857894] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:48:18,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [793714768] [2024-11-14 03:48:18,097 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 03:48:18,097 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:48:18,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:48:18,097 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:48:18,097 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:48:18,581 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 47 for LOIs [2024-11-14 03:48:18,652 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:48:19,751 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1191#(and (= |ULTIMATE.start_main_~len~2#1| 2) (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_33| Int)) (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~#s~0#1.base_33|) 0) 0) (<= 2 |v_ULTIMATE.start_main_~#s~0#1.base_33|) (not (= (select |#valid| |v_ULTIMATE.start_main_~#s~0#1.base_33|) 1)))) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#s~0#1.offset| 0))' at error location [2024-11-14 03:48:19,752 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:48:19,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:48:19,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-14 03:48:19,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952399099] [2024-11-14 03:48:19,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:48:19,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 03:48:19,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:48:19,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 03:48:19,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2024-11-14 03:48:19,754 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 9 states, 8 states have (on average 4.625) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 03:48:19,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:48:19,947 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2024-11-14 03:48:19,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:48:19,948 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.625) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2024-11-14 03:48:19,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:48:19,950 INFO L225 Difference]: With dead ends: 79 [2024-11-14 03:48:19,950 INFO L226 Difference]: Without dead ends: 79 [2024-11-14 03:48:19,953 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2024-11-14 03:48:19,953 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 198 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:48:19,954 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 87 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:48:19,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-14 03:48:19,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2024-11-14 03:48:19,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 64 states have internal predecessors, (71), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:48:19,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2024-11-14 03:48:19,966 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 28 [2024-11-14 03:48:19,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:48:19,966 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2024-11-14 03:48:19,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.625) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 03:48:19,967 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2024-11-14 03:48:19,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-14 03:48:19,967 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:48:19,967 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:48:19,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 03:48:20,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-14 03:48:20,172 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:48:20,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:48:20,172 INFO L85 PathProgramCache]: Analyzing trace with hash 354635191, now seen corresponding path program 1 times [2024-11-14 03:48:20,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:48:20,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409120156] [2024-11-14 03:48:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:20,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:48:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:20,631 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:48:20,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:48:20,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409120156] [2024-11-14 03:48:20,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409120156] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:48:20,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157786593] [2024-11-14 03:48:20,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:20,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:48:20,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:48:20,635 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:48:20,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:48:20,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:20,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 03:48:20,753 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:48:20,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 03:48:20,778 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 03:48:20,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:48:20,823 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 03:48:20,842 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 03:48:20,843 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 03:48:20,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:48:20,894 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 03:48:20,989 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:48:20,989 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:48:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:48:21,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157786593] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:48:21,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [984356096] [2024-11-14 03:48:21,347 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 03:48:21,347 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:48:21,347 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:48:21,348 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:48:21,348 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:48:21,903 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 47 for LOIs [2024-11-14 03:48:21,991 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:48:23,145 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1531#(and (= |ULTIMATE.start_main_~len~2#1| 2) (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_35| Int)) (and (<= (select |#length| |v_ULTIMATE.start_main_~#s~0#1.base_35|) 3) (<= 2 |v_ULTIMATE.start_main_~#s~0#1.base_35|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~#s~0#1.base_35|) 0) 0))) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~k~0#1| 0))' at error location [2024-11-14 03:48:23,146 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:48:23,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:48:23,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 4] total 13 [2024-11-14 03:48:23,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909708120] [2024-11-14 03:48:23,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:48:23,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 03:48:23,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:48:23,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 03:48:23,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2024-11-14 03:48:23,148 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-14 03:48:23,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:48:23,413 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2024-11-14 03:48:23,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:48:23,414 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2024-11-14 03:48:23,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:48:23,415 INFO L225 Difference]: With dead ends: 67 [2024-11-14 03:48:23,415 INFO L226 Difference]: Without dead ends: 67 [2024-11-14 03:48:23,416 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2024-11-14 03:48:23,416 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 170 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:48:23,417 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 114 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:48:23,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-14 03:48:23,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-14 03:48:23,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 62 states have internal predecessors, (69), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:48:23,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2024-11-14 03:48:23,425 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 28 [2024-11-14 03:48:23,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:48:23,426 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2024-11-14 03:48:23,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-14 03:48:23,426 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2024-11-14 03:48:23,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-14 03:48:23,428 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:48:23,428 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:48:23,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 03:48:23,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:48:23,632 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:48:23,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:48:23,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1502087918, now seen corresponding path program 1 times [2024-11-14 03:48:23,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:48:23,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246605062] [2024-11-14 03:48:23,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:23,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:48:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:23,773 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 03:48:23,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:48:23,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246605062] [2024-11-14 03:48:23,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246605062] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:48:23,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:48:23,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:48:23,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357120955] [2024-11-14 03:48:23,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:48:23,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:48:23,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:48:23,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:48:23,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:48:23,775 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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 03:48:23,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:48:23,942 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2024-11-14 03:48:23,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:48:23,943 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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 30 [2024-11-14 03:48:23,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:48:23,944 INFO L225 Difference]: With dead ends: 95 [2024-11-14 03:48:23,944 INFO L226 Difference]: Without dead ends: 95 [2024-11-14 03:48:23,944 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:48:23,945 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 29 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:48:23,945 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 149 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:48:23,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-14 03:48:23,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 71. [2024-11-14 03:48:23,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 66 states have internal predecessors, (76), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:48:23,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2024-11-14 03:48:23,956 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 30 [2024-11-14 03:48:23,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:48:23,959 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2024-11-14 03:48:23,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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 03:48:23,959 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2024-11-14 03:48:23,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-14 03:48:23,959 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:48:23,960 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:48:23,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 03:48:23,960 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:48:23,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:48:23,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1502087919, now seen corresponding path program 1 times [2024-11-14 03:48:23,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:48:23,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408744513] [2024-11-14 03:48:23,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:23,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:48:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 03:48:24,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:48:24,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408744513] [2024-11-14 03:48:24,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408744513] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:48:24,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:48:24,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 03:48:24,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266083199] [2024-11-14 03:48:24,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:48:24,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:48:24,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:48:24,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:48:24,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:48:24,188 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 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 03:48:24,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:48:24,360 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2024-11-14 03:48:24,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:48:24,361 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 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 30 [2024-11-14 03:48:24,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:48:24,361 INFO L225 Difference]: With dead ends: 95 [2024-11-14 03:48:24,362 INFO L226 Difference]: Without dead ends: 95 [2024-11-14 03:48:24,362 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:48:24,362 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 28 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:48:24,363 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 189 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:48:24,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-14 03:48:24,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 71. [2024-11-14 03:48:24,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.5625) internal successors, (75), 66 states have internal predecessors, (75), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:48:24,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2024-11-14 03:48:24,367 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 30 [2024-11-14 03:48:24,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:48:24,367 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2024-11-14 03:48:24,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 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 03:48:24,367 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2024-11-14 03:48:24,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-14 03:48:24,368 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:48:24,368 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:48:24,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 03:48:24,369 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:48:24,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:48:24,369 INFO L85 PathProgramCache]: Analyzing trace with hash 400118405, now seen corresponding path program 1 times [2024-11-14 03:48:24,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:48:24,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14234241] [2024-11-14 03:48:24,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:24,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:48:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:24,459 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 03:48:24,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:48:24,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14234241] [2024-11-14 03:48:24,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14234241] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:48:24,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:48:24,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 03:48:24,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267333330] [2024-11-14 03:48:24,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:48:24,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:48:24,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:48:24,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:48:24,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:48:24,462 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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 03:48:24,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:48:24,613 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2024-11-14 03:48:24,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:48:24,614 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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 32 [2024-11-14 03:48:24,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:48:24,615 INFO L225 Difference]: With dead ends: 95 [2024-11-14 03:48:24,615 INFO L226 Difference]: Without dead ends: 95 [2024-11-14 03:48:24,615 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:48:24,616 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 30 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:48:24,616 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 245 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:48:24,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-14 03:48:24,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 71. [2024-11-14 03:48:24,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 66 states have internal predecessors, (74), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:48:24,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2024-11-14 03:48:24,630 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 32 [2024-11-14 03:48:24,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:48:24,630 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2024-11-14 03:48:24,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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 03:48:24,630 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2024-11-14 03:48:24,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-14 03:48:24,631 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:48:24,631 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] [2024-11-14 03:48:24,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-14 03:48:24,632 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:48:24,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:48:24,632 INFO L85 PathProgramCache]: Analyzing trace with hash 397549078, now seen corresponding path program 1 times [2024-11-14 03:48:24,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:48:24,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138629368] [2024-11-14 03:48:24,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:24,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:48:24,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:25,002 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:48:25,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:48:25,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138629368] [2024-11-14 03:48:25,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138629368] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:48:25,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386423823] [2024-11-14 03:48:25,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:25,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:48:25,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:48:25,005 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:48:25,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:48:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:25,133 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-14 03:48:25,137 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:48:25,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 03:48:25,173 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-14 03:48:25,174 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 03:48:25,220 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 03:48:25,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-14 03:48:25,699 INFO L349 Elim1Store]: treesize reduction 32, result has 70.6 percent of original size [2024-11-14 03:48:25,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 103 [2024-11-14 03:48:26,674 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:48:26,674 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:48:26,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386423823] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:48:26,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1782791760] [2024-11-14 03:48:26,845 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:48:26,846 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:48:26,846 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:48:26,846 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:48:26,846 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:48:27,308 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 47 for LOIs [2024-11-14 03:48:27,359 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:48:29,013 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2341#(and (= |ULTIMATE.start_main_~len~2#1| 2) (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_sll_length_~len~0#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (exists ((|v_ULTIMATE.start_sll_length_~head#1.base_28| Int)) (not (= (select |#valid| |v_ULTIMATE.start_sll_length_~head#1.base_28|) 1))) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))' at error location [2024-11-14 03:48:29,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:48:29,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:48:29,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2024-11-14 03:48:29,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930860496] [2024-11-14 03:48:29,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:48:29,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 03:48:29,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:48:29,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 03:48:29,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=913, Unknown=0, NotChecked=0, Total=992 [2024-11-14 03:48:29,015 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 14 states, 13 states have (on average 3.0) internal successors, (39), 14 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:48:30,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:48:30,011 INFO L93 Difference]: Finished difference Result 119 states and 135 transitions. [2024-11-14 03:48:30,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 03:48:30,012 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 14 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2024-11-14 03:48:30,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:48:30,013 INFO L225 Difference]: With dead ends: 119 [2024-11-14 03:48:30,013 INFO L226 Difference]: Without dead ends: 119 [2024-11-14 03:48:30,013 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=146, Invalid=1414, Unknown=0, NotChecked=0, Total=1560 [2024-11-14 03:48:30,014 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 78 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:48:30,014 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 454 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:48:30,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-14 03:48:30,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 79. [2024-11-14 03:48:30,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 54 states have (on average 1.537037037037037) internal successors, (83), 73 states have internal predecessors, (83), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 03:48:30,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2024-11-14 03:48:30,019 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 32 [2024-11-14 03:48:30,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:48:30,019 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2024-11-14 03:48:30,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 14 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:48:30,019 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2024-11-14 03:48:30,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-14 03:48:30,020 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:48:30,020 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] [2024-11-14 03:48:30,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-14 03:48:30,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:48:30,221 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:48:30,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:48:30,221 INFO L85 PathProgramCache]: Analyzing trace with hash 397549079, now seen corresponding path program 1 times [2024-11-14 03:48:30,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:48:30,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247302792] [2024-11-14 03:48:30,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:30,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:48:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:48:30,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:48:30,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247302792] [2024-11-14 03:48:30,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247302792] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:48:30,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988783708] [2024-11-14 03:48:30,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:30,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:48:30,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:48:30,711 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:48:30,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:48:30,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:30,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-14 03:48:30,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:48:30,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 03:48:30,849 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 03:48:30,911 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-14 03:48:30,912 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 03:48:30,929 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 03:48:30,929 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 03:48:30,978 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 15 treesize of output 1 [2024-11-14 03:48:30,982 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 03:48:31,333 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 03:48:31,351 INFO L349 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2024-11-14 03:48:31,352 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 42 [2024-11-14 03:48:31,388 INFO L349 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2024-11-14 03:48:31,388 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 29 treesize of output 16 [2024-11-14 03:48:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:48:31,398 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:48:31,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988783708] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:48:31,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1831481606] [2024-11-14 03:48:31,613 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:48:31,613 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:48:31,614 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:48:31,614 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:48:31,614 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:48:31,981 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 47 for LOIs [2024-11-14 03:48:32,024 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:48:33,573 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2708#(and (= |ULTIMATE.start_main_~len~2#1| 2) (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_sll_length_~len~0#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))' at error location [2024-11-14 03:48:33,573 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:48:33,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:48:33,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2024-11-14 03:48:33,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452022490] [2024-11-14 03:48:33,574 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:48:33,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-14 03:48:33,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:48:33,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-14 03:48:33,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=973, Unknown=0, NotChecked=0, Total=1056 [2024-11-14 03:48:33,576 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand has 15 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:48:34,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:48:34,596 INFO L93 Difference]: Finished difference Result 121 states and 135 transitions. [2024-11-14 03:48:34,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 03:48:34,597 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2024-11-14 03:48:34,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:48:34,598 INFO L225 Difference]: With dead ends: 121 [2024-11-14 03:48:34,598 INFO L226 Difference]: Without dead ends: 121 [2024-11-14 03:48:34,598 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=162, Invalid=1560, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 03:48:34,599 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 108 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:48:34,599 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 484 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:48:34,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-11-14 03:48:34,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 79. [2024-11-14 03:48:34,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 54 states have (on average 1.5185185185185186) internal successors, (82), 73 states have internal predecessors, (82), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 03:48:34,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2024-11-14 03:48:34,604 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 32 [2024-11-14 03:48:34,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:48:34,604 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2024-11-14 03:48:34,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:48:34,604 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2024-11-14 03:48:34,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 03:48:34,605 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:48:34,605 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:48:34,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 03:48:34,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-14 03:48:34,809 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:48:34,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:48:34,810 INFO L85 PathProgramCache]: Analyzing trace with hash -204784723, now seen corresponding path program 1 times [2024-11-14 03:48:34,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:48:34,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587874065] [2024-11-14 03:48:34,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:34,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:48:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:48:35,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:48:35,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587874065] [2024-11-14 03:48:35,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587874065] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:48:35,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346821215] [2024-11-14 03:48:35,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:35,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:48:35,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:48:35,008 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:48:35,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:48:35,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:35,123 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 03:48:35,127 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:48:35,159 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 15 treesize of output 1 [2024-11-14 03:48:35,308 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 15 treesize of output 7 [2024-11-14 03:48:35,365 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:48:35,365 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2024-11-14 03:48:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:48:35,368 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:48:35,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346821215] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:48:35,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [400182109] [2024-11-14 03:48:35,497 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-14 03:48:35,497 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:48:35,497 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:48:35,498 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:48:35,498 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:48:35,987 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 47 for LOIs [2024-11-14 03:48:36,040 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:48:37,740 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3087#(exists ((|v_ULTIMATE.start_main_#t~ret21#1_21| Int) (|v_ULTIMATE.start_main_~k~0#1_22| Int) (|v_ULTIMATE.start_main_~len~2#1_21| Int)) (and (<= 1 |#StackHeapBarrier|) (not (= 2 |v_ULTIMATE.start_main_#t~ret21#1_21|)) (or (and (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= (select |#valid| |ULTIMATE.start_main_~#s~0#1.base|) 1) (<= 4 (select |#length| |ULTIMATE.start_main_~#s~0#1.base|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= |v_ULTIMATE.start_main_#t~ret21#1_21| 0)) (and (<= 1 |v_ULTIMATE.start_main_#t~ret21#1_21|) (exists ((|v_ULTIMATE.start_sll_length_~head#1.offset_37| Int) (|v_ULTIMATE.start_sll_length_~head#1.base_42| Int)) (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_length_~head#1.base_42|) |v_ULTIMATE.start_sll_length_~head#1.offset_37|) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_length_~head#1.base_42|) |v_ULTIMATE.start_sll_length_~head#1.offset_37|) 0) (<= (+ |v_ULTIMATE.start_sll_length_~head#1.offset_37| 4) (select |#length| |v_ULTIMATE.start_sll_length_~head#1.base_42|)) (= (select |#valid| |v_ULTIMATE.start_sll_length_~head#1.base_42|) 1) (<= 0 |v_ULTIMATE.start_sll_length_~head#1.offset_37|))))) (<= |v_ULTIMATE.start_main_#t~ret21#1_21| 2147483647) (= |v_ULTIMATE.start_main_~k~0#1_22| 0) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|) (= |v_ULTIMATE.start_main_~len~2#1_21| 2)))' at error location [2024-11-14 03:48:37,740 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:48:37,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:48:37,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 13 [2024-11-14 03:48:37,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182765330] [2024-11-14 03:48:37,741 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:48:37,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 03:48:37,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:48:37,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 03:48:37,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=914, Unknown=0, NotChecked=0, Total=992 [2024-11-14 03:48:37,742 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:48:38,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:48:38,266 INFO L93 Difference]: Finished difference Result 121 states and 134 transitions. [2024-11-14 03:48:38,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 03:48:38,267 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 34 [2024-11-14 03:48:38,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:48:38,268 INFO L225 Difference]: With dead ends: 121 [2024-11-14 03:48:38,268 INFO L226 Difference]: Without dead ends: 121 [2024-11-14 03:48:38,269 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=140, Invalid=1420, Unknown=0, NotChecked=0, Total=1560 [2024-11-14 03:48:38,269 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 82 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:48:38,269 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 578 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:48:38,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-11-14 03:48:38,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 79. [2024-11-14 03:48:38,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 54 states have (on average 1.5) internal successors, (81), 73 states have internal predecessors, (81), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 03:48:38,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2024-11-14 03:48:38,274 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 34 [2024-11-14 03:48:38,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:48:38,275 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2024-11-14 03:48:38,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:48:38,275 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2024-11-14 03:48:38,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 03:48:38,276 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:48:38,276 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:48:38,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 03:48:38,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 03:48:38,477 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:48:38,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:48:38,477 INFO L85 PathProgramCache]: Analyzing trace with hash -207354050, now seen corresponding path program 2 times [2024-11-14 03:48:38,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:48:38,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749311300] [2024-11-14 03:48:38,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:38,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:48:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:38,968 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:48:38,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:48:38,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749311300] [2024-11-14 03:48:38,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749311300] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:48:38,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510180991] [2024-11-14 03:48:38,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:48:38,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:48:38,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:48:38,971 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:48:38,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:48:39,093 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 03:48:39,093 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:48:39,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-14 03:48:39,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:48:39,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 03:48:39,159 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 03:48:39,164 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 03:48:39,214 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 03:48:39,214 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 03:48:39,267 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 15 [2024-11-14 03:48:39,276 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 15 [2024-11-14 03:48:39,915 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 03:48:39,977 INFO L349 Elim1Store]: treesize reduction 76, result has 26.9 percent of original size [2024-11-14 03:48:39,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 99 treesize of output 75 [2024-11-14 03:48:40,012 INFO L349 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2024-11-14 03:48:40,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 25 [2024-11-14 03:48:40,017 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:48:40,018 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:48:40,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510180991] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:48:40,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [234206825] [2024-11-14 03:48:40,512 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:48:40,512 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:48:40,513 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:48:40,513 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:48:40,513 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:48:40,920 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 47 for LOIs [2024-11-14 03:48:40,954 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:48:42,646 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3472#(and (= |ULTIMATE.start_main_~len~2#1| 2) (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_sll_length_~len~0#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|) (exists ((|v_ULTIMATE.start_sll_length_~head#1.base_52| Int)) (not (= (select |#valid| |v_ULTIMATE.start_sll_length_~head#1.base_52|) 1))))' at error location [2024-11-14 03:48:42,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:48:42,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:48:42,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2024-11-14 03:48:42,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687989176] [2024-11-14 03:48:42,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:48:42,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-14 03:48:42,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:48:42,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-14 03:48:42,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1242, Unknown=0, NotChecked=0, Total=1332 [2024-11-14 03:48:42,648 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:48:43,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:48:43,750 INFO L93 Difference]: Finished difference Result 132 states and 147 transitions. [2024-11-14 03:48:43,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 03:48:43,750 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 34 [2024-11-14 03:48:43,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:48:43,751 INFO L225 Difference]: With dead ends: 132 [2024-11-14 03:48:43,751 INFO L226 Difference]: Without dead ends: 132 [2024-11-14 03:48:43,751 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=139, Invalid=1753, Unknown=0, NotChecked=0, Total=1892 [2024-11-14 03:48:43,752 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 70 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:48:43,752 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 759 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:48:43,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-14 03:48:43,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 99. [2024-11-14 03:48:43,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 71 states have (on average 1.4225352112676057) internal successors, (101), 91 states have internal predecessors, (101), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 03:48:43,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 113 transitions. [2024-11-14 03:48:43,757 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 113 transitions. Word has length 34 [2024-11-14 03:48:43,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:48:43,757 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 113 transitions. [2024-11-14 03:48:43,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:48:43,757 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 113 transitions. [2024-11-14 03:48:43,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-14 03:48:43,758 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:48:43,758 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:48:43,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 03:48:43,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 03:48:43,962 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:48:43,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:48:43,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1696105771, now seen corresponding path program 2 times [2024-11-14 03:48:43,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:48:43,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341496512] [2024-11-14 03:48:43,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:43,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:48:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 03:48:44,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:48:44,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341496512] [2024-11-14 03:48:44,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341496512] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:48:44,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327595229] [2024-11-14 03:48:44,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:48:44,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:48:44,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:48:44,292 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:48:44,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:48:44,408 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 03:48:44,409 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:48:44,410 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-14 03:48:44,412 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:48:44,497 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 03:48:44,498 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:48:44,762 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 03:48:44,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327595229] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:48:44,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1237554621] [2024-11-14 03:48:44,765 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-14 03:48:44,766 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:48:44,766 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:48:44,766 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:48:44,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:48:45,257 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 47 for LOIs [2024-11-14 03:48:45,307 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:48:46,971 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3965#(exists ((|v_ULTIMATE.start_main_~k~0#1_26| Int) (|v_ULTIMATE.start_main_#t~ret21#1_24| Int) (|v_ULTIMATE.start_main_~len~2#1_24| Int)) (and (<= 1 |#StackHeapBarrier|) (not (= 2 |v_ULTIMATE.start_main_#t~ret21#1_24|)) (= |v_ULTIMATE.start_main_~k~0#1_26| 0) (= |v_ULTIMATE.start_main_~len~2#1_24| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= |v_ULTIMATE.start_main_#t~ret21#1_24| 2147483647) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|) (or (and (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= |v_ULTIMATE.start_main_#t~ret21#1_24| 0) (= (select |#valid| |ULTIMATE.start_main_~#s~0#1.base|) 1) (<= 4 (select |#length| |ULTIMATE.start_main_~#s~0#1.base|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0)) (and (<= 1 |v_ULTIMATE.start_main_#t~ret21#1_24|) (exists ((|v_ULTIMATE.start_sll_length_~head#1.base_58| Int) (|v_ULTIMATE.start_sll_length_~head#1.offset_52| Int)) (and (= (select |#valid| |v_ULTIMATE.start_sll_length_~head#1.base_58|) 1) (<= (+ |v_ULTIMATE.start_sll_length_~head#1.offset_52| 4) (select |#length| |v_ULTIMATE.start_sll_length_~head#1.base_58|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_length_~head#1.base_58|) |v_ULTIMATE.start_sll_length_~head#1.offset_52|) 0) (<= 0 |v_ULTIMATE.start_sll_length_~head#1.offset_52|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_length_~head#1.base_58|) |v_ULTIMATE.start_sll_length_~head#1.offset_52|) 0)))))))' at error location [2024-11-14 03:48:46,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:48:46,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:48:46,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14] total 22 [2024-11-14 03:48:46,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826023257] [2024-11-14 03:48:46,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:48:46,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-14 03:48:46,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:48:46,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-14 03:48:46,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1342, Unknown=0, NotChecked=0, Total=1482 [2024-11-14 03:48:46,974 INFO L87 Difference]: Start difference. First operand 99 states and 113 transitions. Second operand has 22 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 03:48:47,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:48:47,443 INFO L93 Difference]: Finished difference Result 241 states and 298 transitions. [2024-11-14 03:48:47,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 03:48:47,443 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2024-11-14 03:48:47,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:48:47,446 INFO L225 Difference]: With dead ends: 241 [2024-11-14 03:48:47,446 INFO L226 Difference]: Without dead ends: 241 [2024-11-14 03:48:47,447 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 80 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=162, Invalid=1644, Unknown=0, NotChecked=0, Total=1806 [2024-11-14 03:48:47,447 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 82 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:48:47,447 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 999 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:48:47,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2024-11-14 03:48:47,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 168. [2024-11-14 03:48:47,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 132 states have (on average 1.4318181818181819) internal successors, (189), 156 states have internal predecessors, (189), 11 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (22), 8 states have call predecessors, (22), 11 states have call successors, (22) [2024-11-14 03:48:47,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 222 transitions. [2024-11-14 03:48:47,459 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 222 transitions. Word has length 36 [2024-11-14 03:48:47,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:48:47,459 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 222 transitions. [2024-11-14 03:48:47,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 03:48:47,460 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 222 transitions. [2024-11-14 03:48:47,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-14 03:48:47,460 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:48:47,461 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:48:47,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 03:48:47,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 03:48:47,664 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:48:47,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:48:47,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1663718370, now seen corresponding path program 1 times [2024-11-14 03:48:47,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:48:47,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573510668] [2024-11-14 03:48:47,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:47,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:48:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:47,775 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 03:48:47,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:48:47,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573510668] [2024-11-14 03:48:47,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573510668] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:48:47,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907385542] [2024-11-14 03:48:47,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:47,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:48:47,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:48:47,778 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:48:47,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 03:48:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:47,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 03:48:47,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:48:47,954 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 03:48:47,954 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:48:47,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907385542] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:48:47,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:48:47,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-11-14 03:48:47,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83946560] [2024-11-14 03:48:47,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:48:47,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:48:47,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:48:47,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:48:47,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-14 03:48:47,956 INFO L87 Difference]: Start difference. First operand 168 states and 222 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 03:48:48,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:48:48,049 INFO L93 Difference]: Finished difference Result 151 states and 178 transitions. [2024-11-14 03:48:48,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:48:48,049 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2024-11-14 03:48:48,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:48:48,050 INFO L225 Difference]: With dead ends: 151 [2024-11-14 03:48:48,051 INFO L226 Difference]: Without dead ends: 151 [2024-11-14 03:48:48,051 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-14 03:48:48,051 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:48:48,051 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 235 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:48:48,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-14 03:48:48,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2024-11-14 03:48:48,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 118 states have (on average 1.305084745762712) internal successors, (154), 138 states have internal predecessors, (154), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) [2024-11-14 03:48:48,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 178 transitions. [2024-11-14 03:48:48,064 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 178 transitions. Word has length 37 [2024-11-14 03:48:48,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:48:48,064 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 178 transitions. [2024-11-14 03:48:48,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 03:48:48,065 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 178 transitions. [2024-11-14 03:48:48,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-14 03:48:48,066 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:48:48,066 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-14 03:48:48,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 03:48:48,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 03:48:48,267 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:48:48,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:48:48,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1041525774, now seen corresponding path program 1 times [2024-11-14 03:48:48,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:48:48,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144726268] [2024-11-14 03:48:48,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:48,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:48:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:48,406 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 03:48:48,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:48:48,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144726268] [2024-11-14 03:48:48,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144726268] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:48:48,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106397258] [2024-11-14 03:48:48,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:48,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:48:48,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:48:48,409 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:48:48,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 03:48:48,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:48,538 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 03:48:48,540 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:48:48,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-14 03:48:48,666 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 16 treesize of output 8 [2024-11-14 03:48:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 03:48:48,668 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:48:48,730 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 8 treesize of output 4 [2024-11-14 03:48:48,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-14 03:48:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 03:48:48,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106397258] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 03:48:48,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:48:48,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 10] total 16 [2024-11-14 03:48:48,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541079611] [2024-11-14 03:48:48,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:48:48,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 03:48:48,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:48:48,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 03:48:48,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-11-14 03:48:48,784 INFO L87 Difference]: Start difference. First operand 151 states and 178 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 03:48:48,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:48:48,959 INFO L93 Difference]: Finished difference Result 180 states and 213 transitions. [2024-11-14 03:48:48,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 03:48:48,960 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 37 [2024-11-14 03:48:48,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:48:48,961 INFO L225 Difference]: With dead ends: 180 [2024-11-14 03:48:48,961 INFO L226 Difference]: Without dead ends: 180 [2024-11-14 03:48:48,961 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-11-14 03:48:48,962 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 42 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:48:48,962 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 243 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:48:48,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-11-14 03:48:48,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 156. [2024-11-14 03:48:48,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 123 states have (on average 1.3252032520325203) internal successors, (163), 143 states have internal predecessors, (163), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) [2024-11-14 03:48:48,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 187 transitions. [2024-11-14 03:48:48,970 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 187 transitions. Word has length 37 [2024-11-14 03:48:48,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:48:48,970 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 187 transitions. [2024-11-14 03:48:48,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 03:48:48,970 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 187 transitions. [2024-11-14 03:48:48,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-14 03:48:48,971 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:48:48,971 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-14 03:48:48,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 03:48:49,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 03:48:49,172 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:48:49,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:48:49,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1041527566, now seen corresponding path program 1 times [2024-11-14 03:48:49,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:48:49,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588052847] [2024-11-14 03:48:49,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:49,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:48:49,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 03:48:49,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:48:49,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588052847] [2024-11-14 03:48:49,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588052847] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:48:49,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:48:49,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:48:49,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119165344] [2024-11-14 03:48:49,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:48:49,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:48:49,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:48:49,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:48:49,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:48:49,266 INFO L87 Difference]: Start difference. First operand 156 states and 187 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 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 03:48:49,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:48:49,404 INFO L93 Difference]: Finished difference Result 175 states and 205 transitions. [2024-11-14 03:48:49,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:48:49,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 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 37 [2024-11-14 03:48:49,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:48:49,406 INFO L225 Difference]: With dead ends: 175 [2024-11-14 03:48:49,406 INFO L226 Difference]: Without dead ends: 175 [2024-11-14 03:48:49,406 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 03:48:49,406 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 24 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:48:49,406 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 135 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:48:49,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-14 03:48:49,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 156. [2024-11-14 03:48:49,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 124 states have (on average 1.3225806451612903) internal successors, (164), 143 states have internal predecessors, (164), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) [2024-11-14 03:48:49,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 188 transitions. [2024-11-14 03:48:49,419 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 188 transitions. Word has length 37 [2024-11-14 03:48:49,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:48:49,420 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 188 transitions. [2024-11-14 03:48:49,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 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 03:48:49,421 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 188 transitions. [2024-11-14 03:48:49,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-14 03:48:49,422 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:48:49,422 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-14 03:48:49,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-14 03:48:49,422 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:48:49,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:48:49,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1041527565, now seen corresponding path program 1 times [2024-11-14 03:48:49,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:48:49,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381215255] [2024-11-14 03:48:49,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:49,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:48:49,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:48:49,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:48:49,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381215255] [2024-11-14 03:48:49,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381215255] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:48:49,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:48:49,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 03:48:49,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794639381] [2024-11-14 03:48:49,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:48:49,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:48:49,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:48:49,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:48:49,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:48:49,588 INFO L87 Difference]: Start difference. First operand 156 states and 188 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 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 03:48:49,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:48:49,781 INFO L93 Difference]: Finished difference Result 176 states and 205 transitions. [2024-11-14 03:48:49,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:48:49,781 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 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 37 [2024-11-14 03:48:49,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:48:49,782 INFO L225 Difference]: With dead ends: 176 [2024-11-14 03:48:49,782 INFO L226 Difference]: Without dead ends: 176 [2024-11-14 03:48:49,783 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 03:48:49,783 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 21 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:48:49,783 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 174 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:48:49,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-11-14 03:48:49,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 157. [2024-11-14 03:48:49,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 125 states have (on average 1.312) internal successors, (164), 144 states have internal predecessors, (164), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) [2024-11-14 03:48:49,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 188 transitions. [2024-11-14 03:48:49,798 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 188 transitions. Word has length 37 [2024-11-14 03:48:49,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:48:49,798 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 188 transitions. [2024-11-14 03:48:49,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 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 03:48:49,798 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 188 transitions. [2024-11-14 03:48:49,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-14 03:48:49,798 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:48:49,799 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-14 03:48:49,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-14 03:48:49,799 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:48:49,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:48:49,799 INFO L85 PathProgramCache]: Analyzing trace with hash 280473553, now seen corresponding path program 1 times [2024-11-14 03:48:49,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:48:49,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699003470] [2024-11-14 03:48:49,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:49,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:48:49,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:49,945 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 03:48:49,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:48:49,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699003470] [2024-11-14 03:48:49,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699003470] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:48:49,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729413909] [2024-11-14 03:48:49,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:49,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:48:49,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:48:49,948 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:48:49,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 03:48:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:50,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 03:48:50,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:48:50,149 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 03:48:50,150 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:48:50,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729413909] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:48:50,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:48:50,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2024-11-14 03:48:50,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007380688] [2024-11-14 03:48:50,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:48:50,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:48:50,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:48:50,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:48:50,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-14 03:48:50,151 INFO L87 Difference]: Start difference. First operand 157 states and 188 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 03:48:50,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:48:50,273 INFO L93 Difference]: Finished difference Result 179 states and 210 transitions. [2024-11-14 03:48:50,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:48:50,274 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2024-11-14 03:48:50,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:48:50,275 INFO L225 Difference]: With dead ends: 179 [2024-11-14 03:48:50,275 INFO L226 Difference]: Without dead ends: 179 [2024-11-14 03:48:50,275 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-14 03:48:50,276 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 25 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:48:50,278 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 288 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:48:50,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-11-14 03:48:50,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 157. [2024-11-14 03:48:50,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 125 states have (on average 1.296) internal successors, (162), 144 states have internal predecessors, (162), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) [2024-11-14 03:48:50,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 186 transitions. [2024-11-14 03:48:50,285 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 186 transitions. Word has length 38 [2024-11-14 03:48:50,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:48:50,285 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 186 transitions. [2024-11-14 03:48:50,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 03:48:50,286 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 186 transitions. [2024-11-14 03:48:50,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-14 03:48:50,287 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:48:50,287 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:48:50,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 03:48:50,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:48:50,487 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:48:50,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:48:50,488 INFO L85 PathProgramCache]: Analyzing trace with hash -519301470, now seen corresponding path program 1 times [2024-11-14 03:48:50,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:48:50,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136557409] [2024-11-14 03:48:50,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:50,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:48:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 03:48:50,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:48:50,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136557409] [2024-11-14 03:48:50,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136557409] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:48:50,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820406589] [2024-11-14 03:48:50,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:50,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:48:50,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:48:50,762 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:48:50,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 03:48:50,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:50,898 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 03:48:50,900 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:48:50,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 03:48:50,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:48:50,929 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 03:48:50,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:48:50,948 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 03:48:51,039 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 03:48:51,039 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 12 treesize of output 14 [2024-11-14 03:48:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:48:51,053 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:48:51,225 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-14 03:48:51,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820406589] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:48:51,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [943916672] [2024-11-14 03:48:51,227 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2024-11-14 03:48:51,227 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:48:51,228 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:48:51,228 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:48:51,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:48:51,778 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 6 for LOIs [2024-11-14 03:48:51,885 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:48:52,775 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6771#(and (<= 0 (+ |ULTIMATE.start_sll_insert_~position#1| 2147483648)) (= |ULTIMATE.start_main_~i~0#1| 0) (exists ((|v_#valid_136| (Array Int Int))) (and (= |#valid| (store |v_#valid_136| |ULTIMATE.start_sll_insert_~new_node~0#1.base| 1)) (= (select |v_#valid_136| |ULTIMATE.start_sll_insert_~new_node~0#1.base|) 0))) (= |ULTIMATE.start_sll_insert_~head#1.offset| 0) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 0) (exists ((|v_ULTIMATE.start_sll_create_~len#1_80| Int)) (and (or (and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~len~2#1| 2147483647) (= (+ |v_ULTIMATE.start_sll_create_~len#1_80| 1) 0) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|)) (and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~len~2#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~len~2#1| 2147483648)) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 (+ 2147483649 |v_ULTIMATE.start_sll_create_~len#1_80|)))) (<= (+ |v_ULTIMATE.start_sll_create_~len#1_80| 1) 0))) (not (= |ULTIMATE.start_sll_insert_~new_node~0#1.base| 0)) (<= (+ |ULTIMATE.start_sll_insert_~new_node~0#1.base| 1) |#StackHeapBarrier|) (= |ULTIMATE.start_sll_insert_~second_to_last~0#1.base| 0) (<= |ULTIMATE.start_sll_insert_~position#1| 2147483647) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (not (= (select |#valid| |ULTIMATE.start_main_~#s~0#1.base|) 1)) (= |ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| 0) (exists ((|v_#length_110| (Array Int Int))) (= |#length| (store |v_#length_110| |ULTIMATE.start_sll_insert_~new_node~0#1.base| 4))))' at error location [2024-11-14 03:48:52,776 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:48:52,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:48:52,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 11 [2024-11-14 03:48:52,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950067164] [2024-11-14 03:48:52,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:48:52,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 03:48:52,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:48:52,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 03:48:52,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2024-11-14 03:48:52,778 INFO L87 Difference]: Start difference. First operand 157 states and 186 transitions. Second operand has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:48:53,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:48:53,005 INFO L93 Difference]: Finished difference Result 165 states and 195 transitions. [2024-11-14 03:48:53,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 03:48:53,006 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2024-11-14 03:48:53,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:48:53,007 INFO L225 Difference]: With dead ends: 165 [2024-11-14 03:48:53,007 INFO L226 Difference]: Without dead ends: 165 [2024-11-14 03:48:53,008 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2024-11-14 03:48:53,008 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 153 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:48:53,008 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 134 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:48:53,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-11-14 03:48:53,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 155. [2024-11-14 03:48:53,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 125 states have (on average 1.28) internal successors, (160), 142 states have internal predecessors, (160), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) [2024-11-14 03:48:53,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 184 transitions. [2024-11-14 03:48:53,015 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 184 transitions. Word has length 39 [2024-11-14 03:48:53,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:48:53,016 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 184 transitions. [2024-11-14 03:48:53,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:48:53,016 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 184 transitions. [2024-11-14 03:48:53,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-14 03:48:53,017 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:48:53,017 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:48:53,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 03:48:53,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:48:53,221 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:48:53,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:48:53,222 INFO L85 PathProgramCache]: Analyzing trace with hash -519301469, now seen corresponding path program 1 times [2024-11-14 03:48:53,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:48:53,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459454141] [2024-11-14 03:48:53,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:53,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:48:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:53,614 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 03:48:53,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:48:53,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459454141] [2024-11-14 03:48:53,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459454141] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:48:53,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422579473] [2024-11-14 03:48:53,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:53,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:48:53,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:48:53,617 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:48:53,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 03:48:53,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:53,766 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 03:48:53,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:48:53,774 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 03:48:53,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:48:53,796 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 03:48:53,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:48:53,833 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 03:48:54,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:48:54,025 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 03:48:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 03:48:54,037 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:48:54,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422579473] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:48:54,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:48:54,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 9 [2024-11-14 03:48:54,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509254219] [2024-11-14 03:48:54,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:48:54,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:48:54,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:48:54,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:48:54,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-14 03:48:54,039 INFO L87 Difference]: Start difference. First operand 155 states and 184 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 03:48:54,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:48:54,150 INFO L93 Difference]: Finished difference Result 163 states and 192 transitions. [2024-11-14 03:48:54,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:48:54,151 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2024-11-14 03:48:54,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:48:54,152 INFO L225 Difference]: With dead ends: 163 [2024-11-14 03:48:54,152 INFO L226 Difference]: Without dead ends: 163 [2024-11-14 03:48:54,152 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-14 03:48:54,154 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 58 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:48:54,154 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 81 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:48:54,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-14 03:48:54,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 158. [2024-11-14 03:48:54,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 129 states have (on average 1.2635658914728682) internal successors, (163), 144 states have internal predecessors, (163), 8 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (15), 9 states have call predecessors, (15), 8 states have call successors, (15) [2024-11-14 03:48:54,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 186 transitions. [2024-11-14 03:48:54,167 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 186 transitions. Word has length 39 [2024-11-14 03:48:54,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:48:54,167 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 186 transitions. [2024-11-14 03:48:54,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 03:48:54,167 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 186 transitions. [2024-11-14 03:48:54,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-14 03:48:54,168 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:48:54,168 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:48:54,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-14 03:48:54,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:48:54,370 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:48:54,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:48:54,370 INFO L85 PathProgramCache]: Analyzing trace with hash -901119494, now seen corresponding path program 3 times [2024-11-14 03:48:54,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:48:54,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387989284] [2024-11-14 03:48:54,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:54,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:48:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:48:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 03:48:54,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:48:54,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387989284] [2024-11-14 03:48:54,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387989284] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:48:54,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64555600] [2024-11-14 03:48:54,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:48:54,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:48:54,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:48:54,541 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:48:54,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 03:48:54,687 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:48:54,687 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:48:54,693 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-14 03:48:54,695 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:48:54,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 03:48:54,741 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 03:48:54,741 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 12 treesize of output 14 [2024-11-14 03:48:54,788 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 03:48:54,878 INFO L349 Elim1Store]: treesize reduction 64, result has 29.7 percent of original size [2024-11-14 03:48:54,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 36 [2024-11-14 03:48:54,944 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 41 treesize of output 21 [2024-11-14 03:48:54,956 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 03:48:55,430 INFO L349 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2024-11-14 03:48:55,431 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 37 treesize of output 16 [2024-11-14 03:48:55,558 INFO L349 Elim1Store]: treesize reduction 10, result has 69.7 percent of original size [2024-11-14 03:48:55,558 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 51 [2024-11-14 03:48:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:48:55,634 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:48:55,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64555600] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:48:55,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [215690444] [2024-11-14 03:48:55,972 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:48:55,972 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:48:55,972 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:48:55,972 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:48:55,972 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:48:56,310 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 47 for LOIs [2024-11-14 03:48:56,363 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:48:57,931 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7727#(and (= |ULTIMATE.start_main_~len~2#1| 2) (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_sll_length_~len~0#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (exists ((|v_ULTIMATE.start_sll_length_~head#1.base_71| Int)) (not (= (select |#valid| |v_ULTIMATE.start_sll_length_~head#1.base_71|) 1))) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))' at error location [2024-11-14 03:48:57,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:48:57,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:48:57,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2024-11-14 03:48:57,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864938730] [2024-11-14 03:48:57,931 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:48:57,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 03:48:57,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:48:57,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 03:48:57,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1526, Unknown=0, NotChecked=0, Total=1640 [2024-11-14 03:48:57,933 INFO L87 Difference]: Start difference. First operand 158 states and 186 transitions. Second operand has 21 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-14 03:48:59,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:48:59,721 INFO L93 Difference]: Finished difference Result 182 states and 208 transitions. [2024-11-14 03:48:59,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-14 03:48:59,722 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2024-11-14 03:48:59,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:48:59,726 INFO L225 Difference]: With dead ends: 182 [2024-11-14 03:48:59,726 INFO L226 Difference]: Without dead ends: 182 [2024-11-14 03:48:59,727 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=232, Invalid=2960, Unknown=0, NotChecked=0, Total=3192 [2024-11-14 03:48:59,730 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 75 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:48:59,731 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 813 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 03:48:59,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-11-14 03:48:59,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 146. [2024-11-14 03:48:59,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 118 states have (on average 1.2796610169491525) internal successors, (151), 133 states have internal predecessors, (151), 7 states have call successors, (7), 4 states have call predecessors, (7), 7 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-14 03:48:59,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 171 transitions. [2024-11-14 03:48:59,744 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 171 transitions. Word has length 38 [2024-11-14 03:48:59,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:48:59,744 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 171 transitions. [2024-11-14 03:48:59,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-14 03:48:59,745 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 171 transitions. [2024-11-14 03:48:59,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-14 03:48:59,745 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:48:59,746 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-14 03:48:59,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 03:48:59,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:48:59,949 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:48:59,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:48:59,950 INFO L85 PathProgramCache]: Analyzing trace with hash 9981841, now seen corresponding path program 2 times [2024-11-14 03:48:59,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:48:59,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263475190] [2024-11-14 03:48:59,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:48:59,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:48:59,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:49:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:49:00,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:49:00,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263475190] [2024-11-14 03:49:00,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263475190] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:49:00,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567130025] [2024-11-14 03:49:00,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:49:00,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:49:00,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:49:00,135 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:49:00,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 03:49:00,289 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 03:49:00,289 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:49:00,291 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 03:49:00,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:49:00,367 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 03:49:00,367 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:49:00,547 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:49:00,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567130025] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:49:00,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1237634165] [2024-11-14 03:49:00,548 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-14 03:49:00,549 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:49:00,549 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:49:00,549 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:49:00,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:49:01,007 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 59 for LOIs [2024-11-14 03:49:01,083 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:49:02,580 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8343#(exists ((|v_ULTIMATE.start_main_#t~ret21#1_27| Int) (|v_ULTIMATE.start_main_~len~2#1_27| Int) (|v_ULTIMATE.start_main_~k~0#1_31| Int)) (and (not (= (+ |v_ULTIMATE.start_main_~len~2#1_27| |v_ULTIMATE.start_main_~k~0#1_31|) |v_ULTIMATE.start_main_#t~ret21#1_27|)) (or (and (exists ((|v_ULTIMATE.start_sll_length_~head#1.offset_69| Int) (|v_ULTIMATE.start_sll_length_~head#1.base_77| Int)) (and (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_length_~head#1.base_77|) |v_ULTIMATE.start_sll_length_~head#1.offset_69|) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_length_~head#1.base_77|) |v_ULTIMATE.start_sll_length_~head#1.offset_69|) 0) (<= (+ |v_ULTIMATE.start_sll_length_~head#1.offset_69| 4) (select |#length| |v_ULTIMATE.start_sll_length_~head#1.base_77|)) (<= 0 |v_ULTIMATE.start_sll_length_~head#1.offset_69|) (= (select |#valid| |v_ULTIMATE.start_sll_length_~head#1.base_77|) 1))) (<= 1 |v_ULTIMATE.start_main_#t~ret21#1_27|)) (and (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (exists ((|v_ULTIMATE.start_sll_create_~len#1_97| Int)) (and (<= (+ |v_ULTIMATE.start_sll_create_~len#1_97| 1) 0) (or (and (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_~len~2#1_27| 2147483647) (= (+ |v_ULTIMATE.start_sll_create_~len#1_97| 1) 0) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|)) (and (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_~len~2#1_27| 2147483647) (<= 0 (+ 2147483649 |v_ULTIMATE.start_sll_create_~len#1_97|)) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 (+ |v_ULTIMATE.start_main_~len~2#1_27| 2147483648)))))) (= (select |#valid| |ULTIMATE.start_main_~#s~0#1.base|) 1) (= |v_ULTIMATE.start_main_#t~ret21#1_27| 0) (<= 4 (select |#length| |ULTIMATE.start_main_~#s~0#1.base|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0))) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_31| 2147483648)) (<= |v_ULTIMATE.start_main_~k~0#1_31| 0) (<= |v_ULTIMATE.start_main_#t~ret21#1_27| 2147483647) (= |ULTIMATE.start_main_~#s~0#1.offset| 0)))' at error location [2024-11-14 03:49:02,580 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:49:02,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:49:02,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2024-11-14 03:49:02,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477830896] [2024-11-14 03:49:02,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:49:02,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 03:49:02,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:49:02,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 03:49:02,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=853, Unknown=0, NotChecked=0, Total=930 [2024-11-14 03:49:02,582 INFO L87 Difference]: Start difference. First operand 146 states and 171 transitions. Second operand has 16 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 15 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:49:02,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:49:02,924 INFO L93 Difference]: Finished difference Result 140 states and 163 transitions. [2024-11-14 03:49:02,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 03:49:02,925 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 15 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2024-11-14 03:49:02,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:49:02,926 INFO L225 Difference]: With dead ends: 140 [2024-11-14 03:49:02,926 INFO L226 Difference]: Without dead ends: 140 [2024-11-14 03:49:02,926 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2024-11-14 03:49:02,927 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 9 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:49:02,927 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 527 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:49:02,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-14 03:49:02,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 136. [2024-11-14 03:49:02,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 109 states have (on average 1.2935779816513762) internal successors, (141), 124 states have internal predecessors, (141), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-14 03:49:02,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 158 transitions. [2024-11-14 03:49:02,931 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 158 transitions. Word has length 38 [2024-11-14 03:49:02,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:49:02,931 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 158 transitions. [2024-11-14 03:49:02,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 15 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:49:02,932 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 158 transitions. [2024-11-14 03:49:02,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-14 03:49:02,932 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:49:02,933 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-14 03:49:02,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-14 03:49:03,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-14 03:49:03,136 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:49:03,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:49:03,137 INFO L85 PathProgramCache]: Analyzing trace with hash -180557787, now seen corresponding path program 1 times [2024-11-14 03:49:03,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:49:03,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007156342] [2024-11-14 03:49:03,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:49:03,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:49:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:49:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:49:03,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:49:03,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007156342] [2024-11-14 03:49:03,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007156342] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:49:03,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:49:03,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 03:49:03,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328943594] [2024-11-14 03:49:03,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:49:03,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:49:03,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:49:03,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:49:03,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:49:03,224 INFO L87 Difference]: Start difference. First operand 136 states and 158 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 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 03:49:03,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:49:03,374 INFO L93 Difference]: Finished difference Result 154 states and 174 transitions. [2024-11-14 03:49:03,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:49:03,375 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 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 39 [2024-11-14 03:49:03,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:49:03,376 INFO L225 Difference]: With dead ends: 154 [2024-11-14 03:49:03,376 INFO L226 Difference]: Without dead ends: 154 [2024-11-14 03:49:03,376 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 03:49:03,377 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 21 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:49:03,377 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 186 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:49:03,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-11-14 03:49:03,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 137. [2024-11-14 03:49:03,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 110 states have (on average 1.290909090909091) internal successors, (142), 125 states have internal predecessors, (142), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-14 03:49:03,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 159 transitions. [2024-11-14 03:49:03,383 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 159 transitions. Word has length 39 [2024-11-14 03:49:03,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:49:03,383 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 159 transitions. [2024-11-14 03:49:03,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 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 03:49:03,383 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 159 transitions. [2024-11-14 03:49:03,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-14 03:49:03,384 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:49:03,384 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:49:03,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-14 03:49:03,384 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:49:03,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:49:03,385 INFO L85 PathProgramCache]: Analyzing trace with hash -2028431433, now seen corresponding path program 1 times [2024-11-14 03:49:03,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:49:03,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047645957] [2024-11-14 03:49:03,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:49:03,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:49:03,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:49:04,061 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 03:49:04,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:49:04,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047645957] [2024-11-14 03:49:04,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047645957] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:49:04,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824736222] [2024-11-14 03:49:04,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:49:04,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:49:04,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:49:04,064 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:49:04,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 03:49:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:49:04,226 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-14 03:49:04,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:49:04,238 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 03:49:04,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 03:49:04,329 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-14 03:49:04,329 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 17 treesize of output 21 [2024-11-14 03:49:04,342 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 03:49:04,404 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 15 treesize of output 1 [2024-11-14 03:49:04,410 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 03:49:04,485 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2024-11-14 03:49:04,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 20 treesize of output 22 [2024-11-14 03:49:04,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 03:49:04,559 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 57 treesize of output 29 [2024-11-14 03:49:04,570 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 15 [2024-11-14 03:49:05,250 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 03:49:05,313 INFO L349 Elim1Store]: treesize reduction 75, result has 27.9 percent of original size [2024-11-14 03:49:05,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 129 treesize of output 82 [2024-11-14 03:49:05,355 INFO L349 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2024-11-14 03:49:05,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 25 [2024-11-14 03:49:05,397 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:49:05,398 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:49:05,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824736222] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:49:05,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1643465128] [2024-11-14 03:49:05,955 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:49:05,955 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:49:05,955 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:49:05,955 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:49:05,955 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:49:06,348 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 59 for LOIs [2024-11-14 03:49:06,418 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:49:07,632 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9120#(and (<= 0 (+ |ULTIMATE.start_main_~k~0#1| 2147483648)) (<= 1 |ULTIMATE.start_sll_length_~len~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#s~0#1.offset| 0))' at error location [2024-11-14 03:49:07,632 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:49:07,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:49:07,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2024-11-14 03:49:07,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219274483] [2024-11-14 03:49:07,632 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:49:07,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-14 03:49:07,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:49:07,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-14 03:49:07,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2024-11-14 03:49:07,634 INFO L87 Difference]: Start difference. First operand 137 states and 159 transitions. Second operand has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:49:09,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:49:09,866 INFO L93 Difference]: Finished difference Result 177 states and 197 transitions. [2024-11-14 03:49:09,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 03:49:09,866 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 40 [2024-11-14 03:49:09,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:49:09,867 INFO L225 Difference]: With dead ends: 177 [2024-11-14 03:49:09,867 INFO L226 Difference]: Without dead ends: 177 [2024-11-14 03:49:09,868 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=230, Invalid=2422, Unknown=0, NotChecked=0, Total=2652 [2024-11-14 03:49:09,868 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 82 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:49:09,869 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 1170 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1233 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 03:49:09,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-11-14 03:49:09,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 137. [2024-11-14 03:49:09,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 110 states have (on average 1.2818181818181817) internal successors, (141), 125 states have internal predecessors, (141), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-14 03:49:09,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 158 transitions. [2024-11-14 03:49:09,877 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 158 transitions. Word has length 40 [2024-11-14 03:49:09,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:49:09,877 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 158 transitions. [2024-11-14 03:49:09,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:49:09,877 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 158 transitions. [2024-11-14 03:49:09,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-14 03:49:09,878 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:49:09,878 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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 03:49:09,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-14 03:49:10,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-14 03:49:10,079 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:49:10,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:49:10,079 INFO L85 PathProgramCache]: Analyzing trace with hash -34174557, now seen corresponding path program 1 times [2024-11-14 03:49:10,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:49:10,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093106546] [2024-11-14 03:49:10,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:49:10,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:49:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:49:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-14 03:49:10,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:49:10,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093106546] [2024-11-14 03:49:10,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093106546] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:49:10,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:49:10,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:49:10,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464145153] [2024-11-14 03:49:10,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:49:10,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:49:10,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:49:10,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:49:10,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:49:10,141 INFO L87 Difference]: Start difference. First operand 137 states and 158 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-14 03:49:10,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:49:10,192 INFO L93 Difference]: Finished difference Result 136 states and 157 transitions. [2024-11-14 03:49:10,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:49:10,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2024-11-14 03:49:10,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:49:10,195 INFO L225 Difference]: With dead ends: 136 [2024-11-14 03:49:10,195 INFO L226 Difference]: Without dead ends: 136 [2024-11-14 03:49:10,195 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 03:49:10,196 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:49:10,196 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 66 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:49:10,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-14 03:49:10,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2024-11-14 03:49:10,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 110 states have (on average 1.2727272727272727) internal successors, (140), 124 states have internal predecessors, (140), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-14 03:49:10,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 157 transitions. [2024-11-14 03:49:10,203 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 157 transitions. Word has length 42 [2024-11-14 03:49:10,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:49:10,204 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 157 transitions. [2024-11-14 03:49:10,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-14 03:49:10,204 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 157 transitions. [2024-11-14 03:49:10,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-14 03:49:10,204 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:49:10,205 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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 03:49:10,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-14 03:49:10,205 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:49:10,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:49:10,207 INFO L85 PathProgramCache]: Analyzing trace with hash -34174556, now seen corresponding path program 1 times [2024-11-14 03:49:10,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:49:10,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797186603] [2024-11-14 03:49:10,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:49:10,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:49:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:49:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-14 03:49:10,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:49:10,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797186603] [2024-11-14 03:49:10,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797186603] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:49:10,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:49:10,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:49:10,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246261009] [2024-11-14 03:49:10,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:49:10,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:49:10,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:49:10,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:49:10,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:49:10,286 INFO L87 Difference]: Start difference. First operand 136 states and 157 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-14 03:49:10,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:49:10,338 INFO L93 Difference]: Finished difference Result 135 states and 156 transitions. [2024-11-14 03:49:10,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:49:10,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2024-11-14 03:49:10,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:49:10,340 INFO L225 Difference]: With dead ends: 135 [2024-11-14 03:49:10,340 INFO L226 Difference]: Without dead ends: 135 [2024-11-14 03:49:10,340 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 03:49:10,340 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:49:10,341 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 68 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:49:10,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-14 03:49:10,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2024-11-14 03:49:10,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 110 states have (on average 1.2636363636363637) internal successors, (139), 123 states have internal predecessors, (139), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-14 03:49:10,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 156 transitions. [2024-11-14 03:49:10,350 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 156 transitions. Word has length 42 [2024-11-14 03:49:10,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:49:10,351 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 156 transitions. [2024-11-14 03:49:10,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-14 03:49:10,351 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 156 transitions. [2024-11-14 03:49:10,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-14 03:49:10,352 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:49:10,352 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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 03:49:10,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-14 03:49:10,352 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:49:10,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:49:10,353 INFO L85 PathProgramCache]: Analyzing trace with hash -34174502, now seen corresponding path program 1 times [2024-11-14 03:49:10,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:49:10,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516659171] [2024-11-14 03:49:10,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:49:10,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:49:10,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:49:10,458 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 03:49:10,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:49:10,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516659171] [2024-11-14 03:49:10,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516659171] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:49:10,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:49:10,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-14 03:49:10,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730006426] [2024-11-14 03:49:10,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:49:10,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:49:10,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:49:10,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:49:10,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:49:10,461 INFO L87 Difference]: Start difference. First operand 135 states and 156 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-14 03:49:10,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:49:10,567 INFO L93 Difference]: Finished difference Result 145 states and 167 transitions. [2024-11-14 03:49:10,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:49:10,567 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2024-11-14 03:49:10,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:49:10,568 INFO L225 Difference]: With dead ends: 145 [2024-11-14 03:49:10,568 INFO L226 Difference]: Without dead ends: 145 [2024-11-14 03:49:10,569 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:49:10,575 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:49:10,575 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 230 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:49:10,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-14 03:49:10,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2024-11-14 03:49:10,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 119 states have (on average 1.2521008403361344) internal successors, (149), 132 states have internal predecessors, (149), 6 states have call successors, (6), 4 states have call predecessors, (6), 8 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-14 03:49:10,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 167 transitions. [2024-11-14 03:49:10,583 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 167 transitions. Word has length 42 [2024-11-14 03:49:10,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:49:10,583 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 167 transitions. [2024-11-14 03:49:10,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-14 03:49:10,583 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 167 transitions. [2024-11-14 03:49:10,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-14 03:49:10,584 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:49:10,584 INFO L215 NwaCegarLoop]: trace histogram [3, 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 03:49:10,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-11-14 03:49:10,584 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:49:10,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:49:10,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1697783808, now seen corresponding path program 1 times [2024-11-14 03:49:10,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:49:10,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070985317] [2024-11-14 03:49:10,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:49:10,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:49:10,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:49:10,754 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 03:49:10,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:49:10,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070985317] [2024-11-14 03:49:10,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070985317] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:49:10,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423316073] [2024-11-14 03:49:10,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:49:10,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:49:10,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:49:10,759 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:49:10,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 03:49:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:49:10,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 03:49:10,924 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:49:10,957 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 15 treesize of output 1 [2024-11-14 03:49:11,136 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:49:11,136 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 43 [2024-11-14 03:49:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 03:49:11,184 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:49:11,308 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:49:11,308 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 131 [2024-11-14 03:49:11,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 03:49:11,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423316073] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:49:11,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [878099993] [2024-11-14 03:49:11,512 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2024-11-14 03:49:11,512 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:49:11,512 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:49:11,512 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:49:11,512 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:49:12,118 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 47 for LOIs [2024-11-14 03:49:12,165 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:49:20,965 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10583#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_old_#valid#1_10| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_10| |#valid|))) (exists ((|v_#valid_174| (Array Int Int)) (|v_ULTIMATE.start_main_~#s~0#1.base_39| Int)) (and (<= 2 |v_ULTIMATE.start_main_~#s~0#1.base_39|) (= (store |v_#valid_174| |v_ULTIMATE.start_main_~#s~0#1.base_39| 0) |#valid|) (or (exists ((|v_ULTIMATE.start_sll_destroy_~head#1.base_30| Int) (|v_#valid_173| (Array Int Int))) (and (or (= (select |v_#valid_173| |v_ULTIMATE.start_sll_destroy_~head#1.base_30|) 1) (= |v_ULTIMATE.start_sll_destroy_~head#1.base_30| 0)) (<= (+ |v_ULTIMATE.start_sll_destroy_~head#1.base_30| 1) |#StackHeapBarrier|) (= |v_#valid_174| (store |v_#valid_173| |v_ULTIMATE.start_sll_destroy_~head#1.base_30| 0)))) (and (= (select |v_#valid_174| |v_ULTIMATE.start_main_~#s~0#1.base_39|) 1) (<= 4 (select |#length| |v_ULTIMATE.start_main_~#s~0#1.base_39|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~#s~0#1.base_39|) 0) 0) (exists ((|v_ULTIMATE.start_sll_length_~head#1.offset_85| Int) (|v_ULTIMATE.start_sll_length_~head#1.base_93| Int)) (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_length_~head#1.base_93|) |v_ULTIMATE.start_sll_length_~head#1.offset_85|) 0) (<= (+ |v_ULTIMATE.start_sll_length_~head#1.offset_85| 4) (select |#length| |v_ULTIMATE.start_sll_length_~head#1.base_93|)) (= (select |v_#valid_174| |v_ULTIMATE.start_sll_length_~head#1.base_93|) 1) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_length_~head#1.base_93|) |v_ULTIMATE.start_sll_length_~head#1.offset_85|) 0) (<= 0 |v_ULTIMATE.start_sll_length_~head#1.offset_85|))) (= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#s~0#1.base_39|) 0)))))) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-14 03:49:20,966 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:49:20,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:49:20,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 11] total 18 [2024-11-14 03:49:20,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120651257] [2024-11-14 03:49:20,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:49:20,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-14 03:49:20,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:49:20,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-14 03:49:20,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1435, Unknown=14, NotChecked=0, Total=1560 [2024-11-14 03:49:20,967 INFO L87 Difference]: Start difference. First operand 145 states and 167 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-14 03:49:23,101 WARN L539 Checker$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 03:49:25,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:49:28,258 WARN L539 Checker$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 03:49:30,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:49:32,295 WARN L539 Checker$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 03:49:34,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:49:36,393 WARN L539 Checker$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 03:49:36,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:49:36,426 INFO L93 Difference]: Finished difference Result 186 states and 209 transitions. [2024-11-14 03:49:36,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 03:49:36,427 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 42 [2024-11-14 03:49:36,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:49:36,428 INFO L225 Difference]: With dead ends: 186 [2024-11-14 03:49:36,428 INFO L226 Difference]: Without dead ends: 186 [2024-11-14 03:49:36,428 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 91 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=186, Invalid=2250, Unknown=14, NotChecked=0, Total=2450 [2024-11-14 03:49:36,429 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 75 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 4 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:49:36,430 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 561 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 503 Invalid, 7 Unknown, 0 Unchecked, 14.8s Time] [2024-11-14 03:49:36,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-11-14 03:49:36,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 147. [2024-11-14 03:49:36,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 121 states have (on average 1.2479338842975207) internal successors, (151), 134 states have internal predecessors, (151), 6 states have call successors, (6), 4 states have call predecessors, (6), 8 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-14 03:49:36,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 169 transitions. [2024-11-14 03:49:36,436 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 169 transitions. Word has length 42 [2024-11-14 03:49:36,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:49:36,436 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 169 transitions. [2024-11-14 03:49:36,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-14 03:49:36,436 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 169 transitions. [2024-11-14 03:49:36,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-14 03:49:36,437 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:49:36,437 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-14 03:49:36,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-14 03:49:36,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:49:36,642 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:49:36,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:49:36,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1697785600, now seen corresponding path program 1 times [2024-11-14 03:49:36,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:49:36,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358101016] [2024-11-14 03:49:36,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:49:36,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:49:36,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:49:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:49:37,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:49:37,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358101016] [2024-11-14 03:49:37,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358101016] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:49:37,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065420252] [2024-11-14 03:49:37,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:49:37,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:49:37,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:49:37,111 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:49:37,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-14 03:49:37,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:49:37,266 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-14 03:49:37,267 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:49:37,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 03:49:37,327 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 03:49:37,327 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 03:49:37,387 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 15 treesize of output 1 [2024-11-14 03:49:37,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-14 03:49:38,073 INFO L349 Elim1Store]: treesize reduction 7, result has 81.1 percent of original size [2024-11-14 03:49:38,073 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 48 [2024-11-14 03:49:38,201 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 03:49:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:49:38,208 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:49:38,453 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:49:38,453 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 37 treesize of output 41 [2024-11-14 03:49:38,669 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 49 treesize of output 41 [2024-11-14 03:49:39,001 INFO L349 Elim1Store]: treesize reduction 49, result has 50.5 percent of original size [2024-11-14 03:49:39,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 348 treesize of output 325 [2024-11-14 03:49:39,199 INFO L349 Elim1Store]: treesize reduction 11, result has 64.5 percent of original size [2024-11-14 03:49:39,199 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 99 [2024-11-14 03:49:39,385 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:49:39,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065420252] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:49:39,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2042524067] [2024-11-14 03:49:39,387 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-14 03:49:39,387 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:49:39,387 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:49:39,387 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:49:39,387 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:49:39,884 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 47 for LOIs [2024-11-14 03:49:39,919 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:49:54,220 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11235#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_sll_destroy_~head#1.base_39| Int)) (not (= (select |#valid| |v_ULTIMATE.start_sll_destroy_~head#1.base_39|) 1))) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))' at error location [2024-11-14 03:49:54,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:49:54,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:49:54,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 13] total 28 [2024-11-14 03:49:54,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620283193] [2024-11-14 03:49:54,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:49:54,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-14 03:49:54,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:49:54,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-14 03:49:54,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2392, Unknown=13, NotChecked=0, Total=2550 [2024-11-14 03:49:54,222 INFO L87 Difference]: Start difference. First operand 147 states and 169 transitions. Second operand has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 29 states have internal predecessors, (78), 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 03:50:03,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:50:03,993 INFO L93 Difference]: Finished difference Result 182 states and 203 transitions. [2024-11-14 03:50:03,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 03:50:03,994 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 29 states have internal predecessors, (78), 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) Word has length 42 [2024-11-14 03:50:03,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:50:03,995 INFO L225 Difference]: With dead ends: 182 [2024-11-14 03:50:03,995 INFO L226 Difference]: Without dead ends: 182 [2024-11-14 03:50:03,996 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 82 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=255, Invalid=3638, Unknown=13, NotChecked=0, Total=3906 [2024-11-14 03:50:03,997 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 101 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:50:03,997 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 792 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-14 03:50:03,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-11-14 03:50:04,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 148. [2024-11-14 03:50:04,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 122 states have (on average 1.2540983606557377) internal successors, (153), 135 states have internal predecessors, (153), 6 states have call successors, (6), 4 states have call predecessors, (6), 8 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-14 03:50:04,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 171 transitions. [2024-11-14 03:50:04,004 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 171 transitions. Word has length 42 [2024-11-14 03:50:04,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:50:04,004 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 171 transitions. [2024-11-14 03:50:04,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 29 states have internal predecessors, (78), 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 03:50:04,005 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 171 transitions. [2024-11-14 03:50:04,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-14 03:50:04,005 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:50:04,005 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-14 03:50:04,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-14 03:50:04,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-14 03:50:04,206 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:50:04,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:50:04,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1697785599, now seen corresponding path program 1 times [2024-11-14 03:50:04,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:50:04,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026889456] [2024-11-14 03:50:04,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:04,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:50:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:04,954 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:50:04,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:50:04,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026889456] [2024-11-14 03:50:04,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026889456] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:50:04,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545066207] [2024-11-14 03:50:04,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:04,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:50:04,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:50:04,957 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:50:04,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-14 03:50:05,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:05,134 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-14 03:50:05,137 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:50:05,153 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 03:50:05,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 03:50:05,540 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 03:50:05,541 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 03:50:05,557 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 03:50:05,719 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 15 treesize of output 1 [2024-11-14 03:50:05,728 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 03:50:07,330 INFO L349 Elim1Store]: treesize reduction 3, result has 90.9 percent of original size [2024-11-14 03:50:07,331 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 59 [2024-11-14 03:50:07,471 INFO L349 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2024-11-14 03:50:07,471 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 22 treesize of output 30 [2024-11-14 03:50:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:50:07,699 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:50:08,857 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:50:08,858 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 231 treesize of output 233 [2024-11-14 03:50:09,023 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:50:09,024 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 255 treesize of output 265 [2024-11-14 03:50:11,374 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 78 [2024-11-14 03:50:11,539 INFO L349 Elim1Store]: treesize reduction 11, result has 64.5 percent of original size [2024-11-14 03:50:11,540 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 88 treesize of output 95 [2024-11-14 03:50:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 03:50:12,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545066207] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:50:12,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [936689625] [2024-11-14 03:50:12,397 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-14 03:50:12,397 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:50:12,397 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:50:12,398 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:50:12,398 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:50:13,092 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 47 for LOIs [2024-11-14 03:50:13,163 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:50:20,853 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11889#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))' at error location [2024-11-14 03:50:20,853 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:50:20,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:50:20,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 29 [2024-11-14 03:50:20,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462494196] [2024-11-14 03:50:20,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:50:20,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-14 03:50:20,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:50:20,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-14 03:50:20,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=2375, Unknown=12, NotChecked=0, Total=2550 [2024-11-14 03:50:20,856 INFO L87 Difference]: Start difference. First operand 148 states and 171 transitions. Second operand has 30 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 30 states have internal predecessors, (86), 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 03:50:26,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:50:26,248 INFO L93 Difference]: Finished difference Result 183 states and 203 transitions. [2024-11-14 03:50:26,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 03:50:26,249 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 30 states have internal predecessors, (86), 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) Word has length 42 [2024-11-14 03:50:26,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:50:26,250 INFO L225 Difference]: With dead ends: 183 [2024-11-14 03:50:26,250 INFO L226 Difference]: Without dead ends: 183 [2024-11-14 03:50:26,251 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 84 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=292, Invalid=3728, Unknown=12, NotChecked=0, Total=4032 [2024-11-14 03:50:26,252 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 44 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:50:26,252 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 745 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-14 03:50:26,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-14 03:50:26,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 149. [2024-11-14 03:50:26,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 123 states have (on average 1.2439024390243902) internal successors, (153), 136 states have internal predecessors, (153), 6 states have call successors, (6), 4 states have call predecessors, (6), 8 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-14 03:50:26,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 171 transitions. [2024-11-14 03:50:26,260 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 171 transitions. Word has length 42 [2024-11-14 03:50:26,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:50:26,260 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 171 transitions. [2024-11-14 03:50:26,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 30 states have internal predecessors, (86), 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 03:50:26,260 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 171 transitions. [2024-11-14 03:50:26,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-14 03:50:26,261 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:50:26,261 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:50:26,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-14 03:50:26,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:50:26,465 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:50:26,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:50:26,466 INFO L85 PathProgramCache]: Analyzing trace with hash 595184973, now seen corresponding path program 3 times [2024-11-14 03:50:26,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:50:26,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315247797] [2024-11-14 03:50:26,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:26,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:50:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 03:50:27,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:50:27,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315247797] [2024-11-14 03:50:27,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315247797] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:50:27,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597845702] [2024-11-14 03:50:27,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:50:27,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:50:27,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:50:27,150 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:50:27,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-14 03:50:27,323 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:50:27,324 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:50:27,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-14 03:50:27,327 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:50:27,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 03:50:27,500 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 15 treesize of output 1 [2024-11-14 03:50:27,690 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-14 03:50:27,690 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 03:50:27,873 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 28 treesize of output 16 [2024-11-14 03:50:27,888 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 03:50:29,024 INFO L349 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2024-11-14 03:50:29,024 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 37 treesize of output 16 [2024-11-14 03:50:29,366 INFO L349 Elim1Store]: treesize reduction 11, result has 66.7 percent of original size [2024-11-14 03:50:29,366 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 39 [2024-11-14 03:50:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:50:29,375 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:50:30,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597845702] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:50:30,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1935404777] [2024-11-14 03:50:30,274 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-14 03:50:30,274 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:50:30,274 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:50:30,274 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:50:30,275 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:50:30,790 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 68 for LOIs [2024-11-14 03:50:30,884 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:50:35,999 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12452#(= |ULTIMATE.start_main_~#s~0#1.offset| 0)' at error location [2024-11-14 03:50:35,999 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:50:35,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:50:35,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2024-11-14 03:50:36,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165714636] [2024-11-14 03:50:36,000 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:50:36,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 03:50:36,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:50:36,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 03:50:36,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1239, Unknown=0, NotChecked=0, Total=1332 [2024-11-14 03:50:36,001 INFO L87 Difference]: Start difference. First operand 149 states and 171 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:50:42,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:50:42,686 INFO L93 Difference]: Finished difference Result 197 states and 217 transitions. [2024-11-14 03:50:42,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 03:50:42,687 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2024-11-14 03:50:42,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:50:42,688 INFO L225 Difference]: With dead ends: 197 [2024-11-14 03:50:42,689 INFO L226 Difference]: Without dead ends: 197 [2024-11-14 03:50:42,689 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=199, Invalid=2057, Unknown=0, NotChecked=0, Total=2256 [2024-11-14 03:50:42,690 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 81 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:50:42,690 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 1120 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-14 03:50:42,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-14 03:50:42,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 149. [2024-11-14 03:50:42,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 123 states have (on average 1.2357723577235773) internal successors, (152), 136 states have internal predecessors, (152), 6 states have call successors, (6), 4 states have call predecessors, (6), 8 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-14 03:50:42,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 170 transitions. [2024-11-14 03:50:42,697 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 170 transitions. Word has length 42 [2024-11-14 03:50:42,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:50:42,697 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 170 transitions. [2024-11-14 03:50:42,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:50:42,697 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 170 transitions. [2024-11-14 03:50:42,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-14 03:50:42,698 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:50:42,698 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:50:42,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-14 03:50:42,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:50:42,899 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:50:42,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:50:42,899 INFO L85 PathProgramCache]: Analyzing trace with hash 592615646, now seen corresponding path program 1 times [2024-11-14 03:50:42,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:50:42,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312857598] [2024-11-14 03:50:42,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:42,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:50:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:44,975 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 03:50:44,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:50:44,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312857598] [2024-11-14 03:50:44,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312857598] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:50:44,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874534266] [2024-11-14 03:50:44,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:50:44,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:50:44,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:50:44,978 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:50:44,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-14 03:50:45,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:50:45,159 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-14 03:50:45,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:50:45,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 03:50:45,389 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 03:50:45,403 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 03:50:45,649 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-14 03:50:45,649 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 17 treesize of output 21 [2024-11-14 03:50:45,896 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 15 [2024-11-14 03:50:45,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-14 03:50:46,230 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2024-11-14 03:50:46,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 20 treesize of output 22 [2024-11-14 03:50:46,537 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2024-11-14 03:50:46,538 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 74 treesize of output 44 [2024-11-14 03:50:46,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2024-11-14 03:50:49,386 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 03:50:49,934 INFO L349 Elim1Store]: treesize reduction 180, result has 19.6 percent of original size [2024-11-14 03:50:49,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 173 treesize of output 115 [2024-11-14 03:50:50,135 INFO L349 Elim1Store]: treesize reduction 87, result has 10.3 percent of original size [2024-11-14 03:50:50,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 57 treesize of output 34 [2024-11-14 03:50:50,297 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:50:50,297 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:50:52,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874534266] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:50:52,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [152249050] [2024-11-14 03:50:52,249 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:50:52,249 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:50:52,249 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:50:52,250 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:50:52,250 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:50:52,795 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 59 for LOIs [2024-11-14 03:50:52,900 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:50:57,832 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13028#(and (<= 0 (+ |ULTIMATE.start_main_~k~0#1| 2147483648)) (<= 1 |ULTIMATE.start_sll_length_~len~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (exists ((|v_ULTIMATE.start_sll_length_~head#1.base_131| Int)) (not (= (select |#valid| |v_ULTIMATE.start_sll_length_~head#1.base_131|) 1))))' at error location [2024-11-14 03:50:57,832 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:50:57,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:50:57,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2024-11-14 03:50:57,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319490087] [2024-11-14 03:50:57,833 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:50:57,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-14 03:50:57,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:50:57,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-14 03:50:57,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1874, Unknown=0, NotChecked=0, Total=1980 [2024-11-14 03:50:57,835 INFO L87 Difference]: Start difference. First operand 149 states and 170 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:51:04,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:51:04,344 INFO L93 Difference]: Finished difference Result 219 states and 246 transitions. [2024-11-14 03:51:04,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 03:51:04,344 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2024-11-14 03:51:04,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:51:04,345 INFO L225 Difference]: With dead ends: 219 [2024-11-14 03:51:04,346 INFO L226 Difference]: Without dead ends: 219 [2024-11-14 03:51:04,347 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=172, Invalid=2690, Unknown=0, NotChecked=0, Total=2862 [2024-11-14 03:51:04,347 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 86 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:51:04,348 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 1091 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-14 03:51:04,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-11-14 03:51:04,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 177. [2024-11-14 03:51:04,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 147 states have (on average 1.217687074829932) internal successors, (179), 161 states have internal predecessors, (179), 8 states have call successors, (8), 5 states have call predecessors, (8), 10 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2024-11-14 03:51:04,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 203 transitions. [2024-11-14 03:51:04,354 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 203 transitions. Word has length 42 [2024-11-14 03:51:04,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:51:04,354 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 203 transitions. [2024-11-14 03:51:04,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 03:51:04,354 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 203 transitions. [2024-11-14 03:51:04,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-14 03:51:04,355 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:51:04,355 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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 03:51:04,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-14 03:51:04,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:51:04,556 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:51:04,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:51:04,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1517991396, now seen corresponding path program 1 times [2024-11-14 03:51:04,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:51:04,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448336340] [2024-11-14 03:51:04,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:04,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:51:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:04,637 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-14 03:51:04,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:51:04,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448336340] [2024-11-14 03:51:04,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448336340] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:51:04,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:51:04,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:51:04,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888776357] [2024-11-14 03:51:04,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:51:04,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:51:04,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:51:04,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:51:04,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:51:04,639 INFO L87 Difference]: Start difference. First operand 177 states and 203 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-14 03:51:04,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:51:04,852 INFO L93 Difference]: Finished difference Result 181 states and 208 transitions. [2024-11-14 03:51:04,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:51:04,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2024-11-14 03:51:04,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:51:04,854 INFO L225 Difference]: With dead ends: 181 [2024-11-14 03:51:04,854 INFO L226 Difference]: Without dead ends: 181 [2024-11-14 03:51:04,854 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 03:51:04,855 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:51:04,855 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:51:04,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-14 03:51:04,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2024-11-14 03:51:04,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 151 states have (on average 1.218543046357616) internal successors, (184), 165 states have internal predecessors, (184), 8 states have call successors, (8), 5 states have call predecessors, (8), 10 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2024-11-14 03:51:04,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 208 transitions. [2024-11-14 03:51:04,861 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 208 transitions. Word has length 44 [2024-11-14 03:51:04,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:51:04,862 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 208 transitions. [2024-11-14 03:51:04,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-14 03:51:04,862 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 208 transitions. [2024-11-14 03:51:04,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-14 03:51:04,863 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:51:04,863 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:51:04,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-11-14 03:51:04,863 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:51:04,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:51:04,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1843687638, now seen corresponding path program 2 times [2024-11-14 03:51:04,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:51:04,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515500642] [2024-11-14 03:51:04,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:04,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:51:04,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:05,225 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-14 03:51:05,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:51:05,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515500642] [2024-11-14 03:51:05,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515500642] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:51:05,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:51:05,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 03:51:05,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221517129] [2024-11-14 03:51:05,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:51:05,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:51:05,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:51:05,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:51:05,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:51:05,226 INFO L87 Difference]: Start difference. First operand 181 states and 208 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 03:51:06,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:51:06,098 INFO L93 Difference]: Finished difference Result 208 states and 235 transitions. [2024-11-14 03:51:06,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 03:51:06,098 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2024-11-14 03:51:06,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:51:06,100 INFO L225 Difference]: With dead ends: 208 [2024-11-14 03:51:06,100 INFO L226 Difference]: Without dead ends: 208 [2024-11-14 03:51:06,100 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-14 03:51:06,101 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 41 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:51:06,101 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 194 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 03:51:06,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2024-11-14 03:51:06,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 188. [2024-11-14 03:51:06,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 158 states have (on average 1.2215189873417722) internal successors, (193), 171 states have internal predecessors, (193), 8 states have call successors, (8), 5 states have call predecessors, (8), 10 states have return successors, (16), 11 states have call predecessors, (16), 8 states have call successors, (16) [2024-11-14 03:51:06,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 217 transitions. [2024-11-14 03:51:06,107 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 217 transitions. Word has length 44 [2024-11-14 03:51:06,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:51:06,108 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 217 transitions. [2024-11-14 03:51:06,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 03:51:06,108 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 217 transitions. [2024-11-14 03:51:06,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-14 03:51:06,109 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:51:06,109 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:51:06,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-11-14 03:51:06,110 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:51:06,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:51:06,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1843687639, now seen corresponding path program 1 times [2024-11-14 03:51:06,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:51:06,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075535197] [2024-11-14 03:51:06,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:06,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:51:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:06,714 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-14 03:51:06,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:51:06,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075535197] [2024-11-14 03:51:06,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075535197] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:51:06,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:51:06,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 03:51:06,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604554520] [2024-11-14 03:51:06,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:51:06,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:51:06,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:51:06,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:51:06,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:51:06,717 INFO L87 Difference]: Start difference. First operand 188 states and 217 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 03:51:07,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:51:07,662 INFO L93 Difference]: Finished difference Result 208 states and 234 transitions. [2024-11-14 03:51:07,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 03:51:07,663 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2024-11-14 03:51:07,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:51:07,664 INFO L225 Difference]: With dead ends: 208 [2024-11-14 03:51:07,664 INFO L226 Difference]: Without dead ends: 208 [2024-11-14 03:51:07,664 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-14 03:51:07,665 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 38 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:51:07,665 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 188 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 03:51:07,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2024-11-14 03:51:07,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 188. [2024-11-14 03:51:07,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 158 states have (on average 1.2151898734177216) internal successors, (192), 171 states have internal predecessors, (192), 8 states have call successors, (8), 5 states have call predecessors, (8), 10 states have return successors, (16), 11 states have call predecessors, (16), 8 states have call successors, (16) [2024-11-14 03:51:07,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 216 transitions. [2024-11-14 03:51:07,673 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 216 transitions. Word has length 44 [2024-11-14 03:51:07,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:51:07,673 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 216 transitions. [2024-11-14 03:51:07,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 03:51:07,673 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 216 transitions. [2024-11-14 03:51:07,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-14 03:51:07,674 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:51:07,674 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 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] [2024-11-14 03:51:07,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-11-14 03:51:07,674 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:51:07,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:51:07,674 INFO L85 PathProgramCache]: Analyzing trace with hash 515664051, now seen corresponding path program 1 times [2024-11-14 03:51:07,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:51:07,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569221136] [2024-11-14 03:51:07,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:07,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:51:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 03:51:08,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:51:08,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569221136] [2024-11-14 03:51:08,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569221136] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:51:08,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097163804] [2024-11-14 03:51:08,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:08,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:51:08,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:51:08,114 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:51:08,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-14 03:51:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:08,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 03:51:08,327 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:51:08,477 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 03:51:09,263 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:51:09,264 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 44 [2024-11-14 03:51:09,629 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 03:51:09,629 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:51:10,529 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 03:51:10,530 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 138 treesize of output 148 [2024-11-14 03:51:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 03:51:11,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097163804] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:51:11,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [458150531] [2024-11-14 03:51:11,096 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-14 03:51:11,097 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:51:11,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:51:11,097 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:51:11,097 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:51:11,635 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 47 for LOIs [2024-11-14 03:51:11,689 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:51:24,121 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14915#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))' at error location [2024-11-14 03:51:24,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:51:24,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:51:24,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 10] total 17 [2024-11-14 03:51:24,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44187407] [2024-11-14 03:51:24,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:51:24,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-14 03:51:24,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:51:24,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-14 03:51:24,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1359, Unknown=13, NotChecked=0, Total=1482 [2024-11-14 03:51:24,123 INFO L87 Difference]: Start difference. First operand 188 states and 216 transitions. Second operand has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 18 states have internal predecessors, (63), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-14 03:51:26,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:51:30,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 03:51:30,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:51:30,658 INFO L93 Difference]: Finished difference Result 218 states and 244 transitions. [2024-11-14 03:51:30,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 03:51:30,659 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 18 states have internal predecessors, (63), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 44 [2024-11-14 03:51:30,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:51:30,660 INFO L225 Difference]: With dead ends: 218 [2024-11-14 03:51:30,660 INFO L226 Difference]: Without dead ends: 218 [2024-11-14 03:51:30,661 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 92 SyntacticMatches, 11 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=195, Invalid=2242, Unknown=13, NotChecked=0, Total=2450 [2024-11-14 03:51:30,661 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 66 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:51:30,661 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 524 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 533 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2024-11-14 03:51:30,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-11-14 03:51:30,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 189. [2024-11-14 03:51:30,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 159 states have (on average 1.2138364779874213) internal successors, (193), 172 states have internal predecessors, (193), 8 states have call successors, (8), 5 states have call predecessors, (8), 10 states have return successors, (16), 11 states have call predecessors, (16), 8 states have call successors, (16) [2024-11-14 03:51:30,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 217 transitions. [2024-11-14 03:51:30,667 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 217 transitions. Word has length 44 [2024-11-14 03:51:30,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:51:30,667 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 217 transitions. [2024-11-14 03:51:30,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 18 states have internal predecessors, (63), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-14 03:51:30,667 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 217 transitions. [2024-11-14 03:51:30,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-14 03:51:30,668 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:51:30,668 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:51:30,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-14 03:51:30,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-14 03:51:30,868 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:51:30,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:51:30,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1724373899, now seen corresponding path program 4 times [2024-11-14 03:51:30,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:51:30,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067441127] [2024-11-14 03:51:30,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:30,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:51:30,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 03:51:31,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:51:31,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067441127] [2024-11-14 03:51:31,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067441127] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:51:31,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680155126] [2024-11-14 03:51:31,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:51:31,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:51:31,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:51:31,892 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:51:31,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-14 03:51:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:32,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-14 03:51:32,075 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:51:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 03:51:33,063 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:51:34,682 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 03:51:34,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680155126] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:51:34,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1577584227] [2024-11-14 03:51:34,683 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-14 03:51:34,683 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:51:34,683 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:51:34,683 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:51:34,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:51:35,227 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 59 for LOIs [2024-11-14 03:51:35,315 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:51:41,475 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15657#(exists ((|v_ULTIMATE.start_main_#t~ret21#1_40| Int) (|v_ULTIMATE.start_main_~k~0#1_46| Int) (|v_ULTIMATE.start_main_~len~2#1_35| Int)) (and (<= |v_ULTIMATE.start_main_#t~ret21#1_40| 2147483647) (not (= |v_ULTIMATE.start_main_#t~ret21#1_40| (+ |v_ULTIMATE.start_main_~len~2#1_35| |v_ULTIMATE.start_main_~k~0#1_46|))) (<= |v_ULTIMATE.start_main_~k~0#1_46| 0) (or (and (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= (select |#valid| |ULTIMATE.start_main_~#s~0#1.base|) 1) (<= 4 (select |#length| |ULTIMATE.start_main_~#s~0#1.base|)) (= |v_ULTIMATE.start_main_#t~ret21#1_40| 0) (exists ((|v_ULTIMATE.start_sll_create_~len#1_155| Int)) (and (or (and (<= 1 |#StackHeapBarrier|) (= (+ |v_ULTIMATE.start_sll_create_~len#1_155| 1) 0) (<= |v_ULTIMATE.start_main_~len~2#1_35| 2147483647) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|)) (and (<= 0 (+ 2147483649 |v_ULTIMATE.start_sll_create_~len#1_155|)) (<= 1 |#StackHeapBarrier|) (<= 0 (+ |v_ULTIMATE.start_main_~len~2#1_35| 2147483648)) (<= |v_ULTIMATE.start_main_~len~2#1_35| 2147483647) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))) (<= (+ |v_ULTIMATE.start_sll_create_~len#1_155| 1) 0))) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0)) (and (exists ((|v_ULTIMATE.start_sll_length_~head#1.offset_132| Int) (|v_ULTIMATE.start_sll_length_~head#1.base_145| Int)) (and (<= 0 |v_ULTIMATE.start_sll_length_~head#1.offset_132|) (<= (+ |v_ULTIMATE.start_sll_length_~head#1.offset_132| 4) (select |#length| |v_ULTIMATE.start_sll_length_~head#1.base_145|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_length_~head#1.base_145|) |v_ULTIMATE.start_sll_length_~head#1.offset_132|) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_length_~head#1.base_145|) |v_ULTIMATE.start_sll_length_~head#1.offset_132|) 0) (= (select |#valid| |v_ULTIMATE.start_sll_length_~head#1.base_145|) 1))) (<= 1 |v_ULTIMATE.start_main_#t~ret21#1_40|))) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_46| 2147483648)) (= |ULTIMATE.start_main_~#s~0#1.offset| 0)))' at error location [2024-11-14 03:51:41,475 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:51:41,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:51:41,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 32 [2024-11-14 03:51:41,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706394102] [2024-11-14 03:51:41,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:51:41,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-14 03:51:41,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:51:41,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-14 03:51:41,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2024-11-14 03:51:41,477 INFO L87 Difference]: Start difference. First operand 189 states and 217 transitions. Second operand has 32 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 29 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 03:51:45,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:51:45,332 INFO L93 Difference]: Finished difference Result 305 states and 368 transitions. [2024-11-14 03:51:45,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-14 03:51:45,333 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 29 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2024-11-14 03:51:45,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:51:45,335 INFO L225 Difference]: With dead ends: 305 [2024-11-14 03:51:45,335 INFO L226 Difference]: Without dead ends: 305 [2024-11-14 03:51:45,335 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=187, Invalid=2783, Unknown=0, NotChecked=0, Total=2970 [2024-11-14 03:51:45,336 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 71 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:51:45,336 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 800 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-14 03:51:45,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2024-11-14 03:51:45,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 231. [2024-11-14 03:51:45,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 198 states have (on average 1.1919191919191918) internal successors, (236), 211 states have internal predecessors, (236), 10 states have call successors, (10), 5 states have call predecessors, (10), 11 states have return successors, (21), 14 states have call predecessors, (21), 10 states have call successors, (21) [2024-11-14 03:51:45,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 267 transitions. [2024-11-14 03:51:45,352 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 267 transitions. Word has length 44 [2024-11-14 03:51:45,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:51:45,352 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 267 transitions. [2024-11-14 03:51:45,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 29 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 03:51:45,352 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 267 transitions. [2024-11-14 03:51:45,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 03:51:45,353 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:51:45,353 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:51:45,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-14 03:51:45,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-14 03:51:45,554 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:51:45,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:51:45,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1260002994, now seen corresponding path program 1 times [2024-11-14 03:51:45,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:51:45,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858712703] [2024-11-14 03:51:45,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:45,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:51:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:45,957 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 03:51:45,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:51:45,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858712703] [2024-11-14 03:51:45,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858712703] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:51:45,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56934336] [2024-11-14 03:51:45,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:45,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:51:45,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:51:45,960 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:51:45,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-14 03:51:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:46,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 03:51:46,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:51:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 03:51:46,416 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:51:47,061 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 03:51:47,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56934336] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:51:47,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1301899181] [2024-11-14 03:51:47,063 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 03:51:47,063 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:51:47,063 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:51:47,063 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:51:47,063 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:51:47,822 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 36 for LOIs [2024-11-14 03:51:47,885 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:51:52,824 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16516#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= |ULTIMATE.start_sll_insert_~position#1| 2147483646) (= |ULTIMATE.start_sll_insert_~head#1.offset| 0) (<= |ULTIMATE.start_main_~k~0#1| 2147483647) (= |ULTIMATE.start_sll_insert_~new_node~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_sll_insert_~second_to_last~0#1.base|) 1)) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (<= 0 |ULTIMATE.start_sll_insert_~position#1|) (= |ULTIMATE.start_sll_insert_~second_to_last~0#1.offset| |ULTIMATE.start_sll_insert_~last~0#1.offset|))' at error location [2024-11-14 03:51:52,824 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:51:52,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:51:52,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-11-14 03:51:52,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802204083] [2024-11-14 03:51:52,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:51:52,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-14 03:51:52,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:51:52,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-14 03:51:52,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2024-11-14 03:51:52,826 INFO L87 Difference]: Start difference. First operand 231 states and 267 transitions. Second operand has 15 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-14 03:51:53,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:51:53,884 INFO L93 Difference]: Finished difference Result 274 states and 322 transitions. [2024-11-14 03:51:53,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 03:51:53,885 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2024-11-14 03:51:53,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:51:53,887 INFO L225 Difference]: With dead ends: 274 [2024-11-14 03:51:53,887 INFO L226 Difference]: Without dead ends: 274 [2024-11-14 03:51:53,887 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 113 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=135, Invalid=1271, Unknown=0, NotChecked=0, Total=1406 [2024-11-14 03:51:53,888 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 46 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:51:53,888 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 272 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 03:51:53,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2024-11-14 03:51:53,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 263. [2024-11-14 03:51:53,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 226 states have (on average 1.2035398230088497) internal successors, (272), 241 states have internal predecessors, (272), 10 states have call successors, (10), 5 states have call predecessors, (10), 15 states have return successors, (30), 16 states have call predecessors, (30), 10 states have call successors, (30) [2024-11-14 03:51:53,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 312 transitions. [2024-11-14 03:51:53,897 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 312 transitions. Word has length 47 [2024-11-14 03:51:53,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:51:53,897 INFO L471 AbstractCegarLoop]: Abstraction has 263 states and 312 transitions. [2024-11-14 03:51:53,897 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-14 03:51:53,897 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 312 transitions. [2024-11-14 03:51:53,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 03:51:53,898 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:51:53,898 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:51:53,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-14 03:51:54,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-14 03:51:54,099 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:51:54,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:51:54,099 INFO L85 PathProgramCache]: Analyzing trace with hash -645474150, now seen corresponding path program 2 times [2024-11-14 03:51:54,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:51:54,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833415137] [2024-11-14 03:51:54,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:51:54,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:51:54,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:51:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 03:51:54,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:51:54,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833415137] [2024-11-14 03:51:54,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833415137] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:51:54,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676644987] [2024-11-14 03:51:54,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:51:54,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:51:54,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:51:54,801 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:51:54,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-14 03:51:55,022 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 03:51:55,023 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:51:55,024 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-14 03:51:55,026 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:51:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 36 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:51:55,340 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:51:56,093 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 03:51:56,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676644987] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:51:56,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [676039654] [2024-11-14 03:51:56,095 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 03:51:56,095 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:51:56,095 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:51:56,096 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:51:56,096 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:51:56,477 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 59 for LOIs [2024-11-14 03:51:56,565 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:52:00,093 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17368#(and (<= 0 (+ |ULTIMATE.start_main_~k~0#1| 2147483648)) (<= 1 |ULTIMATE.start_sll_length_~len~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 0) (exists ((|v_ULTIMATE.start_sll_length_~head#1.base_154| Int)) (not (= (select |#valid| |v_ULTIMATE.start_sll_length_~head#1.base_154|) 1))) (= |ULTIMATE.start_main_~#s~0#1.offset| 0))' at error location [2024-11-14 03:52:00,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:52:00,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:52:00,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-14 03:52:00,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235409536] [2024-11-14 03:52:00,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:52:00,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 03:52:00,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:52:00,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 03:52:00,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2024-11-14 03:52:00,095 INFO L87 Difference]: Start difference. First operand 263 states and 312 transitions. Second operand has 17 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 16 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:52:01,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:52:01,460 INFO L93 Difference]: Finished difference Result 247 states and 290 transitions. [2024-11-14 03:52:01,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 03:52:01,460 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 16 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2024-11-14 03:52:01,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:52:01,461 INFO L225 Difference]: With dead ends: 247 [2024-11-14 03:52:01,461 INFO L226 Difference]: Without dead ends: 247 [2024-11-14 03:52:01,461 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 114 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 03:52:01,462 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 14 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:52:01,462 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 433 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:52:01,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-11-14 03:52:01,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2024-11-14 03:52:01,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 211 states have (on average 1.2037914691943128) internal successors, (254), 226 states have internal predecessors, (254), 9 states have call successors, (9), 5 states have call predecessors, (9), 15 states have return successors, (27), 15 states have call predecessors, (27), 9 states have call successors, (27) [2024-11-14 03:52:01,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 290 transitions. [2024-11-14 03:52:01,469 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 290 transitions. Word has length 46 [2024-11-14 03:52:01,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:52:01,469 INFO L471 AbstractCegarLoop]: Abstraction has 247 states and 290 transitions. [2024-11-14 03:52:01,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 16 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:52:01,469 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 290 transitions. [2024-11-14 03:52:01,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 03:52:01,470 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:52:01,470 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:52:01,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-14 03:52:01,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-14 03:52:01,671 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:52:01,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:52:01,672 INFO L85 PathProgramCache]: Analyzing trace with hash -585728719, now seen corresponding path program 5 times [2024-11-14 03:52:01,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:52:01,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772162237] [2024-11-14 03:52:01,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:52:01,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:52:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:52:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 03:52:02,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:52:02,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772162237] [2024-11-14 03:52:02,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772162237] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:52:02,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030790642] [2024-11-14 03:52:02,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:52:02,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:52:02,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:52:02,338 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:52:02,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-14 03:52:02,551 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 03:52:02,551 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:52:02,553 INFO L255 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 03:52:02,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:52:03,000 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 03:52:03,000 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:52:04,022 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 03:52:04,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030790642] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:52:04,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [143579508] [2024-11-14 03:52:04,023 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-14 03:52:04,023 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:52:04,023 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:52:04,023 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:52:04,023 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:52:04,518 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 59 for LOIs [2024-11-14 03:52:04,596 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:52:09,837 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18177#(exists ((|v_ULTIMATE.start_main_~k~0#1_49| Int) (|v_ULTIMATE.start_main_~len~2#1_38| Int) (|v_ULTIMATE.start_main_#t~ret21#1_42| Int)) (and (or (and (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= (select |#valid| |ULTIMATE.start_main_~#s~0#1.base|) 1) (<= 4 (select |#length| |ULTIMATE.start_main_~#s~0#1.base|)) (exists ((|v_ULTIMATE.start_sll_create_~len#1_189| Int)) (and (<= (+ |v_ULTIMATE.start_sll_create_~len#1_189| 1) 0) (or (and (<= 1 |#StackHeapBarrier|) (<= 0 (+ |v_ULTIMATE.start_main_~len~2#1_38| 2147483648)) (<= 0 (+ 2147483649 |v_ULTIMATE.start_sll_create_~len#1_189|)) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|) (<= |v_ULTIMATE.start_main_~len~2#1_38| 2147483647)) (and (<= 1 |#StackHeapBarrier|) (= (+ |v_ULTIMATE.start_sll_create_~len#1_189| 1) 0) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|) (<= |v_ULTIMATE.start_main_~len~2#1_38| 2147483647))))) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0) (= |v_ULTIMATE.start_main_#t~ret21#1_42| 0)) (and (exists ((|v_ULTIMATE.start_sll_length_~head#1.base_161| Int) (|v_ULTIMATE.start_sll_length_~head#1.offset_147| Int)) (and (<= (+ |v_ULTIMATE.start_sll_length_~head#1.offset_147| 4) (select |#length| |v_ULTIMATE.start_sll_length_~head#1.base_161|)) (= (select |#valid| |v_ULTIMATE.start_sll_length_~head#1.base_161|) 1) (<= 0 |v_ULTIMATE.start_sll_length_~head#1.offset_147|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_length_~head#1.base_161|) |v_ULTIMATE.start_sll_length_~head#1.offset_147|) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_length_~head#1.base_161|) |v_ULTIMATE.start_sll_length_~head#1.offset_147|) 0))) (<= 1 |v_ULTIMATE.start_main_#t~ret21#1_42|))) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_49| 2147483648)) (not (= |v_ULTIMATE.start_main_#t~ret21#1_42| (+ |v_ULTIMATE.start_main_~len~2#1_38| |v_ULTIMATE.start_main_~k~0#1_49|))) (<= |v_ULTIMATE.start_main_#t~ret21#1_42| 2147483647) (<= |v_ULTIMATE.start_main_~k~0#1_49| 0) (= |ULTIMATE.start_main_~#s~0#1.offset| 0)))' at error location [2024-11-14 03:52:09,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:52:09,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:52:09,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 20 [2024-11-14 03:52:09,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78416232] [2024-11-14 03:52:09,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:52:09,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 03:52:09,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:52:09,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 03:52:09,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 03:52:09,838 INFO L87 Difference]: Start difference. First operand 247 states and 290 transitions. Second operand has 20 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:52:12,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:52:12,008 INFO L93 Difference]: Finished difference Result 235 states and 274 transitions. [2024-11-14 03:52:12,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 03:52:12,009 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2024-11-14 03:52:12,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:52:12,010 INFO L225 Difference]: With dead ends: 235 [2024-11-14 03:52:12,010 INFO L226 Difference]: Without dead ends: 235 [2024-11-14 03:52:12,010 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 110 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=166, Invalid=1726, Unknown=0, NotChecked=0, Total=1892 [2024-11-14 03:52:12,011 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 11 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:52:12,011 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 560 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-14 03:52:12,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-11-14 03:52:12,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2024-11-14 03:52:12,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 200 states have (on average 1.21) internal successors, (242), 215 states have internal predecessors, (242), 8 states have call successors, (8), 5 states have call predecessors, (8), 15 states have return successors, (24), 14 states have call predecessors, (24), 8 states have call successors, (24) [2024-11-14 03:52:12,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 274 transitions. [2024-11-14 03:52:12,019 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 274 transitions. Word has length 46 [2024-11-14 03:52:12,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:52:12,020 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 274 transitions. [2024-11-14 03:52:12,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:52:12,020 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 274 transitions. [2024-11-14 03:52:12,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 03:52:12,021 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:52:12,021 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 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] [2024-11-14 03:52:12,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-14 03:52:12,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-14 03:52:12,222 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-14 03:52:12,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:52:12,222 INFO L85 PathProgramCache]: Analyzing trace with hash -950080334, now seen corresponding path program 2 times [2024-11-14 03:52:12,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:52:12,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967599995] [2024-11-14 03:52:12,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:52:12,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:52:12,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:52:14,025 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 03:52:14,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:52:14,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967599995] [2024-11-14 03:52:14,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967599995] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:52:14,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844684938] [2024-11-14 03:52:14,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:52:14,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:52:14,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:52:14,027 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:52:14,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_597f98c5-3eeb-4326-ab1a-edb5808115ea/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-14 03:52:14,237 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 03:52:14,238 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:52:14,240 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-14 03:52:14,243 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:52:14,454 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-14 03:52:14,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 20 treesize of output 27 [2024-11-14 03:52:15,783 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 03:52:17,839 INFO L349 Elim1Store]: treesize reduction 505, result has 17.3 percent of original size [2024-11-14 03:52:17,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 1691 treesize of output 1853 [2024-11-14 03:52:18,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:52:18,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:52:18,646 INFO L349 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2024-11-14 03:52:18,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 278 treesize of output 225 [2024-11-14 03:52:19,973 INFO L349 Elim1Store]: treesize reduction 73, result has 15.1 percent of original size [2024-11-14 03:52:19,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 29 [2024-11-14 03:52:20,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 03:52:20,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 42 treesize of output 13 [2024-11-14 03:52:22,612 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| Int) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_95| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_95|))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| .cse0) 0))) (and (not (= .cse0 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|)) (= (select |c_#valid| .cse1) 0) (not (= .cse1 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|)))))) (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| Int) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_95| Int)) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_95|))) (let ((.cse5 (select |c_#valid| .cse2)) (.cse3 (select (select |c_#memory_$Pointer$.base| .cse2) 0))) (and (= .cse2 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) (= .cse2 .cse3) (exists ((v_DerPreprocessor_15 Int) (v_DerPreprocessor_16 Int)) (let ((.cse4 (store (store (store |c_#valid| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| v_DerPreprocessor_15) .cse3 v_DerPreprocessor_16) .cse2 .cse5))) (and (= (select .cse4 .cse3) v_DerPreprocessor_16) (= (select .cse4 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) v_DerPreprocessor_15)))) (exists ((v_DerPreprocessor_5 Int) (v_DerPreprocessor_20 Int)) (let ((.cse6 (store |c_#valid| .cse3 v_DerPreprocessor_20))) (and (= (select (store (store .cse6 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| v_DerPreprocessor_5) .cse2 .cse5) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) v_DerPreprocessor_5) (= v_DerPreprocessor_20 (select (store .cse6 .cse2 .cse5) .cse3))))))))) (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| Int) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_95| Int) (v_DerPreprocessor_7 Int)) (let ((.cse7 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_95|))) (let ((.cse9 (select |c_#valid| .cse7)) (.cse8 (select (select |c_#memory_$Pointer$.base| .cse7) 0))) (and (not (= .cse7 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|)) (= (select (store (store (store |c_#valid| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| 0) .cse8 0) .cse7 .cse9) .cse8) 0) (= (select (store (store (store |c_#valid| .cse8 0) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| v_DerPreprocessor_7) .cse7 .cse9) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) (select |c_#valid| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|)) (not (= .cse8 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|)))))) (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| Int) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_95| Int)) (let ((.cse10 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_95|))) (let ((.cse13 (select (select |c_#memory_$Pointer$.base| .cse10) 0))) (let ((.cse11 (store |c_#valid| .cse13 0)) (.cse12 (select |c_#valid| .cse10))) (and (= .cse10 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) (= 0 (select (store .cse11 .cse10 .cse12) .cse13)) (exists ((v_DerPreprocessor_3 Int)) (= v_DerPreprocessor_3 (select (store (store .cse11 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| v_DerPreprocessor_3) .cse10 .cse12) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|))) (exists ((v_DerPreprocessor_9 Int) (v_DerPreprocessor_10 Int)) (let ((.cse15 (store (store (store |c_#valid| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| v_DerPreprocessor_9) .cse13 v_DerPreprocessor_10) .cse10 .cse12))) (let ((.cse14 (select .cse15 .cse13))) (and (= (select |c_#valid| .cse13) .cse14) (= (select .cse15 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) v_DerPreprocessor_9) (= v_DerPreprocessor_10 .cse14)))))))))) (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| Int) (v_DerPreprocessor_15 Int) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_95| Int) (v_DerPreprocessor_16 Int) (v_DerPreprocessor_5 Int)) (let ((.cse21 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_95|))) (let ((.cse22 (select |c_#valid| .cse21)) (.cse19 (select (select |c_#memory_$Pointer$.base| .cse21) 0))) (let ((.cse20 (store |c_#valid| .cse19 0)) (.cse18 (store (store (store |c_#valid| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| v_DerPreprocessor_15) .cse19 v_DerPreprocessor_16) .cse21 .cse22))) (let ((.cse16 (select .cse18 .cse19)) (.cse17 (select (store (store .cse20 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| v_DerPreprocessor_5) .cse21 .cse22) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|))) (and (= .cse16 v_DerPreprocessor_16) (= .cse17 (select |c_#valid| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|)) (= (select .cse18 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) v_DerPreprocessor_15) (= .cse19 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) (= .cse16 (select |c_#valid| .cse19)) (= .cse17 v_DerPreprocessor_5) (= (select (store .cse20 .cse21 .cse22) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) 0))))))) (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| Int) (v_DerPreprocessor_9 Int) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_95| Int) (v_DerPreprocessor_3 Int) (v_DerPreprocessor_10 Int)) (let ((.cse24 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_95|))) (let ((.cse26 (select (select |c_#memory_$Pointer$.base| .cse24) 0)) (.cse25 (select |c_#valid| .cse24))) (let ((.cse28 (store (store (store |c_#valid| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| v_DerPreprocessor_9) .cse26 v_DerPreprocessor_10) .cse24 .cse25))) (let ((.cse23 (store |c_#valid| .cse26 0)) (.cse27 (select .cse28 .cse26))) (and (= v_DerPreprocessor_3 (select (store (store .cse23 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| v_DerPreprocessor_3) .cse24 .cse25) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|)) (= .cse24 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) (= (select |c_#valid| .cse26) .cse27) (= (select .cse28 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) v_DerPreprocessor_9) (= (select (store .cse23 .cse24 .cse25) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) 0) (= v_DerPreprocessor_10 .cse27))))))) (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| Int) (v_DerPreprocessor_15 Int) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_95| Int) (v_DerPreprocessor_16 Int) (v_DerPreprocessor_5 Int) (v_DerPreprocessor_30 Int)) (let ((.cse32 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_95|))) (let ((.cse30 (select (select |c_#memory_$Pointer$.base| .cse32) 0))) (let ((.cse31 (store |c_#valid| .cse30 v_DerPreprocessor_30)) (.cse33 (select |c_#valid| .cse32))) (let ((.cse29 (store (store (store |c_#valid| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| v_DerPreprocessor_15) .cse30 v_DerPreprocessor_16) .cse32 .cse33)) (.cse34 (store .cse31 .cse32 .cse33))) (and (= (select .cse29 .cse30) v_DerPreprocessor_16) (= (select .cse29 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) v_DerPreprocessor_15) (= .cse30 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) (= v_DerPreprocessor_5 (select (store (store .cse31 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| v_DerPreprocessor_5) .cse32 .cse33) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|)) (= .cse32 .cse30) (= (select .cse34 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) 0) (= v_DerPreprocessor_30 (select .cse34 .cse30)))))))) (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| Int) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_95| Int)) (let ((.cse35 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_95|))) (let ((.cse36 (select (select |c_#memory_$Pointer$.base| .cse35) 0))) (and (= .cse35 .cse36) (not (= .cse36 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|)))))) (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| Int) (v_DerPreprocessor_9 Int) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_95| Int) (v_DerPreprocessor_27 Int) (v_DerPreprocessor_3 Int) (v_DerPreprocessor_10 Int)) (let ((.cse39 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_95|))) (let ((.cse38 (select (select |c_#memory_$Pointer$.base| .cse39) 0))) (let ((.cse41 (store |c_#valid| .cse38 v_DerPreprocessor_27)) (.cse42 (select |c_#valid| .cse39))) (let ((.cse37 (store .cse41 .cse39 .cse42)) (.cse40 (store (store (store |c_#valid| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| v_DerPreprocessor_9) .cse38 v_DerPreprocessor_10) .cse39 .cse42))) (and (= v_DerPreprocessor_27 (select .cse37 .cse38)) (= (select .cse37 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) 0) (= .cse39 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) (= .cse39 .cse38) (= (select .cse40 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) v_DerPreprocessor_9) (= v_DerPreprocessor_10 (select .cse40 .cse38)) (= v_DerPreprocessor_3 (select (store (store .cse41 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| v_DerPreprocessor_3) .cse39 .cse42) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|)))))))) (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| Int) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_95| Int)) (let ((.cse44 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_95|))) (let ((.cse45 (select |c_#valid| .cse44)) (.cse46 (select (select |c_#memory_$Pointer$.base| .cse44) 0))) (and (exists ((v_DerPreprocessor_22 Int) (v_DerPreprocessor_3 Int)) (let ((.cse43 (store |c_#valid| .cse46 v_DerPreprocessor_22))) (and (= (select (store (store .cse43 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| v_DerPreprocessor_3) .cse44 .cse45) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) v_DerPreprocessor_3) (= v_DerPreprocessor_22 (select (store .cse43 .cse44 .cse45) .cse46))))) (= .cse44 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) (exists ((v_DerPreprocessor_9 Int) (v_DerPreprocessor_10 Int)) (let ((.cse47 (store (store (store |c_#valid| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| v_DerPreprocessor_9) .cse46 v_DerPreprocessor_10) .cse44 .cse45))) (and (= (select .cse47 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) v_DerPreprocessor_9) (= v_DerPreprocessor_10 (select .cse47 .cse46))))) (= .cse44 .cse46))))) (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| Int) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_95| Int)) (let ((.cse48 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_95|))) (let ((.cse49 (select (select |c_#memory_$Pointer$.base| .cse48) 0))) (let ((.cse50 (store |c_#valid| .cse49 0)) (.cse51 (select |c_#valid| .cse48))) (and (= .cse48 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) (= .cse49 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) (exists ((v_DerPreprocessor_5 Int)) (= (select (store (store .cse50 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| v_DerPreprocessor_5) .cse48 .cse51) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) v_DerPreprocessor_5)) (exists ((v_DerPreprocessor_15 Int) (v_DerPreprocessor_16 Int)) (let ((.cse52 (store (store (store |c_#valid| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| v_DerPreprocessor_15) .cse49 v_DerPreprocessor_16) .cse48 .cse51))) (and (= (select .cse52 .cse49) v_DerPreprocessor_16) (= (select .cse52 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) v_DerPreprocessor_15)))) (= 0 (select (store .cse50 .cse48 .cse51) .cse49))))))) (exists ((v_DerPreprocessor_25 Int) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| Int) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_95| Int) (v_DerPreprocessor_7 Int)) (let ((.cse54 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_95|))) (let ((.cse55 (select |c_#valid| .cse54)) (.cse53 (select (select |c_#memory_$Pointer$.base| .cse54) 0))) (and (= (select (store (store (store |c_#valid| .cse53 v_DerPreprocessor_25) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| v_DerPreprocessor_7) .cse54 .cse55) |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|) (select |c_#valid| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|)) (= .cse54 .cse53) (= (select (store (store (store |c_#valid| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101| 0) .cse53 v_DerPreprocessor_25) .cse54 .cse55) .cse53) v_DerPreprocessor_25) (not (= .cse53 |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_101|))))))) is different from true [2024-11-14 03:52:47,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-14 03:56:04,691 WARN L286 SmtUtils]: Spent 3.18m on a formula simplification. DAG size of input: 2794 DAG size of output: 2746 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-14 03:56:04,692 INFO L349 Elim1Store]: treesize reduction 144, result has 98.0 percent of original size [2024-11-14 03:56:04,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 37 select indices, 37 select index equivalence classes, 0 disjoint index pairs (out of 666 index pairs), introduced 55 new quantified variables, introduced 666 case distinctions, treesize of input 2415 treesize of output 8245