./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fabf091179f48b7141dc193b5040f4974c042bd8a2afb03b99137d693bf63ce7 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:10:45,008 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:10:45,097 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 03:10:45,107 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:10:45,108 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:10:45,151 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:10:45,152 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:10:45,153 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:10:45,153 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:10:45,154 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:10:45,155 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:10:45,155 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:10:45,155 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:10:45,155 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:10:45,156 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:10:45,156 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:10:45,156 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:10:45,156 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:10:45,156 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:10:45,156 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:10:45,156 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 03:10:45,156 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 03:10:45,156 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 03:10:45,156 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:10:45,156 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 03:10:45,157 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 03:10:45,157 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:10:45,157 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:10:45,157 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:10:45,157 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:10:45,157 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:10:45,158 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:10:45,158 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:10:45,159 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:10:45,159 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:10:45,159 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:10:45,159 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:10:45,159 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:10:45,159 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:10:45,159 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:10:45,160 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:10:45,160 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:10:45,160 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:10:45,160 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:10:45,160 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:10:45,161 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:10:45,161 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:10:45,161 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB 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 -> Automizer 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 -> fabf091179f48b7141dc193b5040f4974c042bd8a2afb03b99137d693bf63ce7 [2024-11-28 03:10:45,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:10:45,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:10:45,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:10:45,535 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:10:45,536 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:10:45,538 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i [2024-11-28 03:10:48,780 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/data/4d0512f6b/c5f42d39311d4609837074b971468b14/FLAG61677da4b [2024-11-28 03:10:49,139 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:10:49,140 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i [2024-11-28 03:10:49,155 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/data/4d0512f6b/c5f42d39311d4609837074b971468b14/FLAG61677da4b [2024-11-28 03:10:49,178 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/data/4d0512f6b/c5f42d39311d4609837074b971468b14 [2024-11-28 03:10:49,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:10:49,185 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:10:49,189 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:10:49,190 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:10:49,196 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:10:49,198 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:10:49" (1/1) ... [2024-11-28 03:10:49,201 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9326104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:10:49, skipping insertion in model container [2024-11-28 03:10:49,201 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:10:49" (1/1) ... [2024-11-28 03:10:49,248 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:10:49,647 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:10:49,661 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:10:49,735 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:10:49,775 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:10:49,776 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:10:49 WrapperNode [2024-11-28 03:10:49,776 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:10:49,777 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:10:49,778 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:10:49,778 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:10:49,785 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:10:49" (1/1) ... [2024-11-28 03:10:49,798 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:10:49" (1/1) ... [2024-11-28 03:10:49,820 INFO L138 Inliner]: procedures = 129, calls = 40, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 182 [2024-11-28 03:10:49,820 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:10:49,821 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:10:49,824 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:10:49,824 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:10:49,835 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:10:49" (1/1) ... [2024-11-28 03:10:49,836 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:10:49" (1/1) ... [2024-11-28 03:10:49,841 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:10:49" (1/1) ... [2024-11-28 03:10:49,870 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 5, 13]. 65 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0]. The 6 writes are split as follows [0, 1, 5]. [2024-11-28 03:10:49,870 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:10:49" (1/1) ... [2024-11-28 03:10:49,871 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:10:49" (1/1) ... [2024-11-28 03:10:49,880 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:10:49" (1/1) ... [2024-11-28 03:10:49,881 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:10:49" (1/1) ... [2024-11-28 03:10:49,890 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:10:49" (1/1) ... [2024-11-28 03:10:49,892 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:10:49" (1/1) ... [2024-11-28 03:10:49,896 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:10:49" (1/1) ... [2024-11-28 03:10:49,903 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:10:49,904 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:10:49,908 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:10:49,908 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:10:49,910 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:10:49" (1/1) ... [2024-11-28 03:10:49,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:10:49,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:10:49,956 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:10:49,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:10:49,989 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2024-11-28 03:10:49,989 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2024-11-28 03:10:49,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 03:10:49,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:10:49,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 03:10:49,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-28 03:10:49,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-28 03:10:49,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-28 03:10:49,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-28 03:10:49,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-28 03:10:49,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-28 03:10:49,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 03:10:49,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-28 03:10:49,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-28 03:10:49,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-28 03:10:49,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 03:10:49,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 03:10:49,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-28 03:10:49,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:10:49,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:10:50,163 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:10:50,165 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:10:50,189 INFO L727 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2024-11-28 03:10:50,677 INFO L? ?]: Removed 130 outVars from TransFormulas that were not future-live. [2024-11-28 03:10:50,678 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:10:50,696 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:10:50,696 INFO L312 CfgBuilder]: Removed 9 assume(true) statements. [2024-11-28 03:10:50,696 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:10:50 BoogieIcfgContainer [2024-11-28 03:10:50,697 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:10:50,699 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:10:50,699 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:10:50,705 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:10:50,705 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:10:49" (1/3) ... [2024-11-28 03:10:50,706 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a367fde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:10:50, skipping insertion in model container [2024-11-28 03:10:50,706 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:10:49" (2/3) ... [2024-11-28 03:10:50,707 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a367fde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:10:50, skipping insertion in model container [2024-11-28 03:10:50,707 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:10:50" (3/3) ... [2024-11-28 03:10:50,709 INFO L128 eAbstractionObserver]: Analyzing ICFG sll_of_sll_nondet_append-1.i [2024-11-28 03:10:50,729 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:10:50,731 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sll_of_sll_nondet_append-1.i that has 2 procedures, 125 locations, 1 initial locations, 9 loop locations, and 42 error locations. [2024-11-28 03:10:50,788 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:10:50,809 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=PETRI_NET, 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;@5a737e4b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:10:50,809 INFO L334 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2024-11-28 03:10:50,814 INFO L276 IsEmpty]: Start isEmpty. Operand has 124 states, 79 states have (on average 1.8734177215189873) internal successors, (148), 122 states have internal predecessors, (148), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:50,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-28 03:10:50,822 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:10:50,822 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-28 03:10:50,823 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:10:50,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:10:50,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1083175, now seen corresponding path program 1 times [2024-11-28 03:10:50,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:10:50,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467248074] [2024-11-28 03:10:50,855 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:10:50,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:10:50,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:10:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:10:51,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:10:51,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467248074] [2024-11-28 03:10:51,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467248074] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:10:51,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:10:51,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:10:51,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60152273] [2024-11-28 03:10:51,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:10:51,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 03:10:51,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:10:51,058 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 03:10:51,058 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 03:10:51,062 INFO L87 Difference]: Start difference. First operand has 124 states, 79 states have (on average 1.8734177215189873) internal successors, (148), 122 states have internal predecessors, (148), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:51,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:10:51,090 INFO L93 Difference]: Finished difference Result 123 states and 138 transitions. [2024-11-28 03:10:51,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 03:10:51,092 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-28 03:10:51,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:10:51,099 INFO L225 Difference]: With dead ends: 123 [2024-11-28 03:10:51,100 INFO L226 Difference]: Without dead ends: 117 [2024-11-28 03:10:51,101 INFO L434 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 [2024-11-28 03:10:51,107 INFO L435 NwaCegarLoop]: 138 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:10:51,108 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:10:51,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-28 03:10:51,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2024-11-28 03:10:51,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 75 states have (on average 1.7333333333333334) internal successors, (130), 116 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:51,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 130 transitions. [2024-11-28 03:10:51,158 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 130 transitions. Word has length 4 [2024-11-28 03:10:51,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:10:51,159 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 130 transitions. [2024-11-28 03:10:51,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:51,160 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 130 transitions. [2024-11-28 03:10:51,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-28 03:10:51,160 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:10:51,161 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-28 03:10:51,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 03:10:51,161 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:10:51,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:10:51,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1079796, now seen corresponding path program 1 times [2024-11-28 03:10:51,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:10:51,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601798600] [2024-11-28 03:10:51,162 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:10:51,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:10:51,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:10:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:10:51,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:10:51,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601798600] [2024-11-28 03:10:51,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601798600] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:10:51,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:10:51,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:10:51,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543164588] [2024-11-28 03:10:51,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:10:51,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:10:51,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:10:51,305 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:10:51,305 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:10:51,305 INFO L87 Difference]: Start difference. First operand 117 states and 130 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:51,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:10:51,385 INFO L93 Difference]: Finished difference Result 167 states and 185 transitions. [2024-11-28 03:10:51,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:10:51,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-28 03:10:51,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:10:51,388 INFO L225 Difference]: With dead ends: 167 [2024-11-28 03:10:51,390 INFO L226 Difference]: Without dead ends: 167 [2024-11-28 03:10:51,391 INFO L434 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 [2024-11-28 03:10:51,392 INFO L435 NwaCegarLoop]: 127 mSDtfsCounter, 54 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:10:51,392 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 242 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:10:51,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-11-28 03:10:51,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 118. [2024-11-28 03:10:51,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 76 states have (on average 1.7236842105263157) internal successors, (131), 117 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:51,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 131 transitions. [2024-11-28 03:10:51,409 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 131 transitions. Word has length 4 [2024-11-28 03:10:51,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:10:51,409 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 131 transitions. [2024-11-28 03:10:51,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:51,410 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 131 transitions. [2024-11-28 03:10:51,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 03:10:51,410 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:10:51,410 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:10:51,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 03:10:51,411 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:10:51,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:10:51,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1462008149, now seen corresponding path program 1 times [2024-11-28 03:10:51,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:10:51,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353303975] [2024-11-28 03:10:51,412 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:10:51,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:10:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:10:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:10:51,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:10:51,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353303975] [2024-11-28 03:10:51,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353303975] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:10:51,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418351907] [2024-11-28 03:10:51,567 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:10:51,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:10:51,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:10:51,571 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:10:51,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:10:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:10:51,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:10:51,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:10:51,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:10:51,803 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:10:51,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:10:51,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418351907] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:10:51,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:10:51,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-28 03:10:51,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194071440] [2024-11-28 03:10:51,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:10:51,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:10:51,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:10:51,863 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:10:51,863 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:10:51,863 INFO L87 Difference]: Start difference. First operand 118 states and 131 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:52,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:10:52,018 INFO L93 Difference]: Finished difference Result 255 states and 280 transitions. [2024-11-28 03:10:52,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:10:52,019 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-28 03:10:52,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:10:52,021 INFO L225 Difference]: With dead ends: 255 [2024-11-28 03:10:52,021 INFO L226 Difference]: Without dead ends: 255 [2024-11-28 03:10:52,021 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:10:52,022 INFO L435 NwaCegarLoop]: 156 mSDtfsCounter, 217 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:10:52,022 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 760 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:10:52,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2024-11-28 03:10:52,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 185. [2024-11-28 03:10:52,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 143 states have (on average 1.7132867132867133) internal successors, (245), 184 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:52,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 245 transitions. [2024-11-28 03:10:52,036 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 245 transitions. Word has length 10 [2024-11-28 03:10:52,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:10:52,036 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 245 transitions. [2024-11-28 03:10:52,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:52,037 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 245 transitions. [2024-11-28 03:10:52,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 03:10:52,037 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:10:52,037 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:10:52,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 03:10:52,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:10:52,242 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:10:52,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:10:52,242 INFO L85 PathProgramCache]: Analyzing trace with hash -99947209, now seen corresponding path program 1 times [2024-11-28 03:10:52,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:10:52,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705110090] [2024-11-28 03:10:52,243 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:10:52,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:10:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:10:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:10:52,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:10:52,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705110090] [2024-11-28 03:10:52,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705110090] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:10:52,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:10:52,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:10:52,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263181645] [2024-11-28 03:10:52,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:10:52,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:10:52,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:10:52,331 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:10:52,331 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:10:52,331 INFO L87 Difference]: Start difference. First operand 185 states and 245 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:52,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:10:52,417 INFO L93 Difference]: Finished difference Result 184 states and 242 transitions. [2024-11-28 03:10:52,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:10:52,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-28 03:10:52,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:10:52,418 INFO L225 Difference]: With dead ends: 184 [2024-11-28 03:10:52,418 INFO L226 Difference]: Without dead ends: 184 [2024-11-28 03:10:52,419 INFO L434 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 [2024-11-28 03:10:52,419 INFO L435 NwaCegarLoop]: 125 mSDtfsCounter, 1 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:10:52,420 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 206 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:10:52,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-11-28 03:10:52,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2024-11-28 03:10:52,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 143 states have (on average 1.6923076923076923) internal successors, (242), 183 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:52,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 242 transitions. [2024-11-28 03:10:52,430 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 242 transitions. Word has length 14 [2024-11-28 03:10:52,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:10:52,430 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 242 transitions. [2024-11-28 03:10:52,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:52,431 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 242 transitions. [2024-11-28 03:10:52,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 03:10:52,431 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:10:52,431 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:10:52,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 03:10:52,432 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:10:52,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:10:52,432 INFO L85 PathProgramCache]: Analyzing trace with hash -99947208, now seen corresponding path program 1 times [2024-11-28 03:10:52,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:10:52,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405757123] [2024-11-28 03:10:52,432 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:10:52,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:10:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:10:52,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:10:52,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:10:52,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405757123] [2024-11-28 03:10:52,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405757123] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:10:52,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:10:52,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:10:52,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956551196] [2024-11-28 03:10:52,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:10:52,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:10:52,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:10:52,629 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:10:52,629 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:10:52,632 INFO L87 Difference]: Start difference. First operand 184 states and 242 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:52,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:10:52,727 INFO L93 Difference]: Finished difference Result 183 states and 239 transitions. [2024-11-28 03:10:52,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:10:52,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-28 03:10:52,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:10:52,728 INFO L225 Difference]: With dead ends: 183 [2024-11-28 03:10:52,729 INFO L226 Difference]: Without dead ends: 183 [2024-11-28 03:10:52,729 INFO L434 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 [2024-11-28 03:10:52,730 INFO L435 NwaCegarLoop]: 125 mSDtfsCounter, 1 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:10:52,730 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 212 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:10:52,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-28 03:10:52,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2024-11-28 03:10:52,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 143 states have (on average 1.6713286713286712) internal successors, (239), 182 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:52,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 239 transitions. [2024-11-28 03:10:52,752 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 239 transitions. Word has length 14 [2024-11-28 03:10:52,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:10:52,753 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 239 transitions. [2024-11-28 03:10:52,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:52,753 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 239 transitions. [2024-11-28 03:10:52,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 03:10:52,754 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:10:52,754 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:10:52,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 03:10:52,754 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:10:52,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:10:52,759 INFO L85 PathProgramCache]: Analyzing trace with hash -99872861, now seen corresponding path program 1 times [2024-11-28 03:10:52,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:10:52,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487023486] [2024-11-28 03:10:52,759 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:10:52,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:10:52,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:10:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:10:52,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:10:52,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487023486] [2024-11-28 03:10:52,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487023486] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:10:52,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:10:52,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:10:52,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585446538] [2024-11-28 03:10:52,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:10:52,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:10:52,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:10:52,836 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:10:52,836 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:10:52,836 INFO L87 Difference]: Start difference. First operand 183 states and 239 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:52,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:10:52,928 INFO L93 Difference]: Finished difference Result 181 states and 233 transitions. [2024-11-28 03:10:52,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:10:52,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-28 03:10:52,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:10:52,931 INFO L225 Difference]: With dead ends: 181 [2024-11-28 03:10:52,931 INFO L226 Difference]: Without dead ends: 181 [2024-11-28 03:10:52,931 INFO L434 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 [2024-11-28 03:10:52,932 INFO L435 NwaCegarLoop]: 118 mSDtfsCounter, 7 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:10:52,932 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 190 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:10:52,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-28 03:10:52,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2024-11-28 03:10:52,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.6293706293706294) internal successors, (233), 180 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:52,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 233 transitions. [2024-11-28 03:10:52,952 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 233 transitions. Word has length 14 [2024-11-28 03:10:52,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:10:52,952 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 233 transitions. [2024-11-28 03:10:52,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:52,952 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 233 transitions. [2024-11-28 03:10:52,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 03:10:52,953 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:10:52,953 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:10:52,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 03:10:52,953 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:10:52,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:10:52,953 INFO L85 PathProgramCache]: Analyzing trace with hash -99872860, now seen corresponding path program 1 times [2024-11-28 03:10:52,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:10:52,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337399450] [2024-11-28 03:10:52,954 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:10:52,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:10:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:10:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:10:53,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:10:53,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337399450] [2024-11-28 03:10:53,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337399450] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:10:53,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:10:53,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:10:53,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789439595] [2024-11-28 03:10:53,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:10:53,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:10:53,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:10:53,047 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:10:53,048 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:10:53,048 INFO L87 Difference]: Start difference. First operand 181 states and 233 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:53,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:10:53,129 INFO L93 Difference]: Finished difference Result 179 states and 227 transitions. [2024-11-28 03:10:53,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:10:53,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-28 03:10:53,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:10:53,131 INFO L225 Difference]: With dead ends: 179 [2024-11-28 03:10:53,131 INFO L226 Difference]: Without dead ends: 179 [2024-11-28 03:10:53,131 INFO L434 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 [2024-11-28 03:10:53,132 INFO L435 NwaCegarLoop]: 118 mSDtfsCounter, 7 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:10:53,132 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 196 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:10:53,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-11-28 03:10:53,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2024-11-28 03:10:53,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 143 states have (on average 1.5874125874125875) internal successors, (227), 178 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:53,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 227 transitions. [2024-11-28 03:10:53,139 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 227 transitions. Word has length 14 [2024-11-28 03:10:53,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:10:53,139 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 227 transitions. [2024-11-28 03:10:53,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:53,139 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 227 transitions. [2024-11-28 03:10:53,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-28 03:10:53,140 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:10:53,140 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:10:53,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 03:10:53,140 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:10:53,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:10:53,141 INFO L85 PathProgramCache]: Analyzing trace with hash 515762124, now seen corresponding path program 1 times [2024-11-28 03:10:53,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:10:53,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29628381] [2024-11-28 03:10:53,141 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:10:53,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:10:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:10:53,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:10:53,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:10:53,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29628381] [2024-11-28 03:10:53,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29628381] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:10:53,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:10:53,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:10:53,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164113381] [2024-11-28 03:10:53,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:10:53,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:10:53,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:10:53,251 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:10:53,251 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:10:53,251 INFO L87 Difference]: Start difference. First operand 179 states and 227 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:53,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:10:53,390 INFO L93 Difference]: Finished difference Result 178 states and 224 transitions. [2024-11-28 03:10:53,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:10:53,391 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-28 03:10:53,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:10:53,392 INFO L225 Difference]: With dead ends: 178 [2024-11-28 03:10:53,392 INFO L226 Difference]: Without dead ends: 178 [2024-11-28 03:10:53,392 INFO L434 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 [2024-11-28 03:10:53,393 INFO L435 NwaCegarLoop]: 104 mSDtfsCounter, 29 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:10:53,393 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 321 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:10:53,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-28 03:10:53,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2024-11-28 03:10:53,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 143 states have (on average 1.5664335664335665) internal successors, (224), 177 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:53,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 224 transitions. [2024-11-28 03:10:53,399 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 224 transitions. Word has length 19 [2024-11-28 03:10:53,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:10:53,399 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 224 transitions. [2024-11-28 03:10:53,399 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:53,399 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 224 transitions. [2024-11-28 03:10:53,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-28 03:10:53,400 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:10:53,400 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:10:53,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 03:10:53,404 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:10:53,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:10:53,405 INFO L85 PathProgramCache]: Analyzing trace with hash 515762125, now seen corresponding path program 1 times [2024-11-28 03:10:53,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:10:53,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527541960] [2024-11-28 03:10:53,405 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:10:53,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:10:53,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:10:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:10:53,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:10:53,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527541960] [2024-11-28 03:10:53,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527541960] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:10:53,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:10:53,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:10:53,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030183959] [2024-11-28 03:10:53,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:10:53,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:10:53,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:10:53,625 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:10:53,626 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:10:53,626 INFO L87 Difference]: Start difference. First operand 178 states and 224 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:53,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:10:53,730 INFO L93 Difference]: Finished difference Result 253 states and 308 transitions. [2024-11-28 03:10:53,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:10:53,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-28 03:10:53,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:10:53,736 INFO L225 Difference]: With dead ends: 253 [2024-11-28 03:10:53,736 INFO L226 Difference]: Without dead ends: 253 [2024-11-28 03:10:53,736 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:10:53,739 INFO L435 NwaCegarLoop]: 172 mSDtfsCounter, 112 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:10:53,739 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 575 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:10:53,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2024-11-28 03:10:53,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 181. [2024-11-28 03:10:53,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 146 states have (on average 1.5547945205479452) internal successors, (227), 180 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:53,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 227 transitions. [2024-11-28 03:10:53,747 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 227 transitions. Word has length 19 [2024-11-28 03:10:53,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:10:53,748 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 227 transitions. [2024-11-28 03:10:53,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:53,748 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 227 transitions. [2024-11-28 03:10:53,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 03:10:53,749 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:10:53,749 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2024-11-28 03:10:53,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 03:10:53,750 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:10:53,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:10:53,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1777115607, now seen corresponding path program 2 times [2024-11-28 03:10:53,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:10:53,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743695251] [2024-11-28 03:10:53,751 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:10:53,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:10:53,773 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:10:53,773 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:10:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 03:10:53,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:10:53,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743695251] [2024-11-28 03:10:53,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743695251] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:10:53,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:10:53,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:10:53,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873200187] [2024-11-28 03:10:53,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:10:53,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:10:53,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:10:53,830 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:10:53,830 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:10:53,830 INFO L87 Difference]: Start difference. First operand 181 states and 227 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:53,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:10:53,915 INFO L93 Difference]: Finished difference Result 179 states and 225 transitions. [2024-11-28 03:10:53,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:10:53,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-28 03:10:53,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:10:53,916 INFO L225 Difference]: With dead ends: 179 [2024-11-28 03:10:53,916 INFO L226 Difference]: Without dead ends: 179 [2024-11-28 03:10:53,917 INFO L434 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 [2024-11-28 03:10:53,917 INFO L435 NwaCegarLoop]: 94 mSDtfsCounter, 76 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:10:53,917 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 118 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:10:53,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-11-28 03:10:53,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2024-11-28 03:10:53,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 146 states have (on average 1.5410958904109588) internal successors, (225), 178 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:53,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 225 transitions. [2024-11-28 03:10:53,924 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 225 transitions. Word has length 22 [2024-11-28 03:10:53,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:10:53,924 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 225 transitions. [2024-11-28 03:10:53,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:53,924 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 225 transitions. [2024-11-28 03:10:53,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 03:10:53,925 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:10:53,925 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2024-11-28 03:10:53,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-28 03:10:53,925 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:10:53,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:10:53,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1777115606, now seen corresponding path program 1 times [2024-11-28 03:10:53,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:10:53,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441541677] [2024-11-28 03:10:53,926 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:10:53,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:10:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:10:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 03:10:54,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:10:54,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441541677] [2024-11-28 03:10:54,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441541677] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:10:54,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:10:54,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:10:54,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747697847] [2024-11-28 03:10:54,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:10:54,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:10:54,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:10:54,037 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:10:54,037 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:10:54,038 INFO L87 Difference]: Start difference. First operand 179 states and 225 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:54,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:10:54,133 INFO L93 Difference]: Finished difference Result 204 states and 252 transitions. [2024-11-28 03:10:54,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:10:54,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-28 03:10:54,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:10:54,136 INFO L225 Difference]: With dead ends: 204 [2024-11-28 03:10:54,136 INFO L226 Difference]: Without dead ends: 204 [2024-11-28 03:10:54,136 INFO L434 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 [2024-11-28 03:10:54,137 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 104 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:10:54,137 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 102 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:10:54,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-11-28 03:10:54,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 177. [2024-11-28 03:10:54,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 146 states have (on average 1.5273972602739727) internal successors, (223), 176 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:54,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 223 transitions. [2024-11-28 03:10:54,150 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 223 transitions. Word has length 22 [2024-11-28 03:10:54,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:10:54,151 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 223 transitions. [2024-11-28 03:10:54,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:54,151 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 223 transitions. [2024-11-28 03:10:54,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-28 03:10:54,156 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:10:54,156 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:10:54,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-28 03:10:54,156 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:10:54,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:10:54,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1739826412, now seen corresponding path program 1 times [2024-11-28 03:10:54,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:10:54,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062098507] [2024-11-28 03:10:54,157 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:10:54,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:10:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:10:54,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:10:54,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:10:54,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062098507] [2024-11-28 03:10:54,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062098507] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:10:54,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463759032] [2024-11-28 03:10:54,385 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:10:54,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:10:54,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:10:54,388 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:10:54,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:10:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:10:54,542 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:10:54,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:10:54,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:10:54,613 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:10:54,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:10:54,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463759032] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:10:54,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:10:54,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2024-11-28 03:10:54,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690969404] [2024-11-28 03:10:54,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:10:54,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 03:10:54,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:10:54,720 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 03:10:54,721 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:10:54,722 INFO L87 Difference]: Start difference. First operand 177 states and 223 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:54,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:10:54,904 INFO L93 Difference]: Finished difference Result 265 states and 320 transitions. [2024-11-28 03:10:54,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:10:54,904 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-28 03:10:54,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:10:54,906 INFO L225 Difference]: With dead ends: 265 [2024-11-28 03:10:54,906 INFO L226 Difference]: Without dead ends: 265 [2024-11-28 03:10:54,906 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-11-28 03:10:54,907 INFO L435 NwaCegarLoop]: 166 mSDtfsCounter, 116 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:10:54,907 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 937 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:10:54,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-11-28 03:10:54,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 207. [2024-11-28 03:10:54,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 176 states have (on average 1.4375) internal successors, (253), 206 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:54,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 253 transitions. [2024-11-28 03:10:54,921 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 253 transitions. Word has length 24 [2024-11-28 03:10:54,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:10:54,921 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 253 transitions. [2024-11-28 03:10:54,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:54,921 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 253 transitions. [2024-11-28 03:10:54,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-28 03:10:54,922 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:10:54,922 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:10:54,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 03:10:55,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-28 03:10:55,129 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:10:55,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:10:55,129 INFO L85 PathProgramCache]: Analyzing trace with hash 413244633, now seen corresponding path program 1 times [2024-11-28 03:10:55,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:10:55,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485340491] [2024-11-28 03:10:55,130 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:10:55,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:10:55,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:10:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 03:10:55,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:10:55,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485340491] [2024-11-28 03:10:55,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485340491] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:10:55,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:10:55,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:10:55,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194305141] [2024-11-28 03:10:55,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:10:55,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:10:55,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:10:55,268 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:10:55,268 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:10:55,269 INFO L87 Difference]: Start difference. First operand 207 states and 253 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:55,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:10:55,368 INFO L93 Difference]: Finished difference Result 352 states and 436 transitions. [2024-11-28 03:10:55,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:10:55,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-28 03:10:55,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:10:55,371 INFO L225 Difference]: With dead ends: 352 [2024-11-28 03:10:55,371 INFO L226 Difference]: Without dead ends: 352 [2024-11-28 03:10:55,371 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:10:55,372 INFO L435 NwaCegarLoop]: 113 mSDtfsCounter, 45 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:10:55,372 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 439 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:10:55,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2024-11-28 03:10:55,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 336. [2024-11-28 03:10:55,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 305 states have (on average 1.3934426229508197) internal successors, (425), 335 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:55,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 425 transitions. [2024-11-28 03:10:55,391 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 425 transitions. Word has length 27 [2024-11-28 03:10:55,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:10:55,392 INFO L471 AbstractCegarLoop]: Abstraction has 336 states and 425 transitions. [2024-11-28 03:10:55,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:55,392 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 425 transitions. [2024-11-28 03:10:55,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-28 03:10:55,393 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:10:55,393 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:10:55,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 03:10:55,393 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:10:55,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:10:55,397 INFO L85 PathProgramCache]: Analyzing trace with hash -70565403, now seen corresponding path program 1 times [2024-11-28 03:10:55,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:10:55,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531508030] [2024-11-28 03:10:55,397 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:10:55,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:10:55,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:10:55,608 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 03:10:55,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:10:55,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531508030] [2024-11-28 03:10:55,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531508030] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:10:55,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:10:55,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:10:55,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290353584] [2024-11-28 03:10:55,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:10:55,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:10:55,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:10:55,609 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:10:55,610 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:10:55,610 INFO L87 Difference]: Start difference. First operand 336 states and 425 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:55,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:10:55,693 INFO L93 Difference]: Finished difference Result 354 states and 438 transitions. [2024-11-28 03:10:55,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:10:55,694 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-28 03:10:55,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:10:55,696 INFO L225 Difference]: With dead ends: 354 [2024-11-28 03:10:55,696 INFO L226 Difference]: Without dead ends: 354 [2024-11-28 03:10:55,696 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:10:55,697 INFO L435 NwaCegarLoop]: 113 mSDtfsCounter, 41 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 433 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 [2024-11-28 03:10:55,697 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 433 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:10:55,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2024-11-28 03:10:55,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 340. [2024-11-28 03:10:55,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 309 states have (on average 1.3883495145631068) internal successors, (429), 339 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:55,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 429 transitions. [2024-11-28 03:10:55,721 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 429 transitions. Word has length 28 [2024-11-28 03:10:55,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:10:55,722 INFO L471 AbstractCegarLoop]: Abstraction has 340 states and 429 transitions. [2024-11-28 03:10:55,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:55,722 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 429 transitions. [2024-11-28 03:10:55,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-28 03:10:55,726 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:10:55,726 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:10:55,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-28 03:10:55,726 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:10:55,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:10:55,727 INFO L85 PathProgramCache]: Analyzing trace with hash 2107443173, now seen corresponding path program 1 times [2024-11-28 03:10:55,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:10:55,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533260335] [2024-11-28 03:10:55,730 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:10:55,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:10:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:10:55,922 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 03:10:55,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:10:55,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533260335] [2024-11-28 03:10:55,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533260335] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:10:55,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:10:55,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:10:55,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264916518] [2024-11-28 03:10:55,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:10:55,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:10:55,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:10:55,924 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:10:55,924 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:10:55,925 INFO L87 Difference]: Start difference. First operand 340 states and 429 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:56,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:10:56,037 INFO L93 Difference]: Finished difference Result 368 states and 463 transitions. [2024-11-28 03:10:56,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:10:56,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-28 03:10:56,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:10:56,039 INFO L225 Difference]: With dead ends: 368 [2024-11-28 03:10:56,040 INFO L226 Difference]: Without dead ends: 360 [2024-11-28 03:10:56,042 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:10:56,043 INFO L435 NwaCegarLoop]: 115 mSDtfsCounter, 2 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:10:56,043 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 277 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:10:56,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2024-11-28 03:10:56,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 355. [2024-11-28 03:10:56,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 324 states have (on average 1.3888888888888888) internal successors, (450), 354 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:56,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 450 transitions. [2024-11-28 03:10:56,059 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 450 transitions. Word has length 29 [2024-11-28 03:10:56,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:10:56,060 INFO L471 AbstractCegarLoop]: Abstraction has 355 states and 450 transitions. [2024-11-28 03:10:56,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:56,060 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 450 transitions. [2024-11-28 03:10:56,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-28 03:10:56,062 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:10:56,062 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:10:56,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-28 03:10:56,063 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:10:56,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:10:56,063 INFO L85 PathProgramCache]: Analyzing trace with hash 96346804, now seen corresponding path program 2 times [2024-11-28 03:10:56,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:10:56,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278822076] [2024-11-28 03:10:56,063 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:10:56,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:10:56,103 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:10:56,103 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:10:56,313 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 03:10:56,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:10:56,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278822076] [2024-11-28 03:10:56,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278822076] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:10:56,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:10:56,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:10:56,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678649655] [2024-11-28 03:10:56,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:10:56,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:10:56,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:10:56,317 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:10:56,317 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:10:56,317 INFO L87 Difference]: Start difference. First operand 355 states and 450 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:56,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:10:56,446 INFO L93 Difference]: Finished difference Result 354 states and 444 transitions. [2024-11-28 03:10:56,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:10:56,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-28 03:10:56,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:10:56,449 INFO L225 Difference]: With dead ends: 354 [2024-11-28 03:10:56,449 INFO L226 Difference]: Without dead ends: 354 [2024-11-28 03:10:56,449 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:10:56,450 INFO L435 NwaCegarLoop]: 100 mSDtfsCounter, 29 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:10:56,450 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 345 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:10:56,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2024-11-28 03:10:56,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2024-11-28 03:10:56,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 324 states have (on average 1.3703703703703705) internal successors, (444), 353 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:56,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 444 transitions. [2024-11-28 03:10:56,462 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 444 transitions. Word has length 34 [2024-11-28 03:10:56,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:10:56,463 INFO L471 AbstractCegarLoop]: Abstraction has 354 states and 444 transitions. [2024-11-28 03:10:56,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:56,463 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 444 transitions. [2024-11-28 03:10:56,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 03:10:56,464 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:10:56,464 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:10:56,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-28 03:10:56,465 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:10:56,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:10:56,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1308216350, now seen corresponding path program 1 times [2024-11-28 03:10:56,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:10:56,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919308706] [2024-11-28 03:10:56,466 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:10:56,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:10:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:10:56,957 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:10:56,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:10:56,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919308706] [2024-11-28 03:10:56,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919308706] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:10:56,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725826273] [2024-11-28 03:10:56,958 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:10:56,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:10:56,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:10:56,960 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:10:56,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:10:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:10:57,123 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 03:10:57,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:10:57,155 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 [2024-11-28 03:10:57,228 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-28 03:10:57,228 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 [2024-11-28 03:10:57,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:10:57,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-28 03:10:57,365 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2024-11-28 03:10:57,365 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 16 treesize of output 22 [2024-11-28 03:10:57,547 INFO L349 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2024-11-28 03:10:57,548 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 3 case distinctions, treesize of input 22 treesize of output 43 [2024-11-28 03:10:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:10:57,887 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:10:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 03:10:58,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725826273] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:10:58,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:10:58,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 15 [2024-11-28 03:10:58,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535694639] [2024-11-28 03:10:58,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:10:58,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 03:10:58,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:10:58,396 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 03:10:58,396 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:10:58,396 INFO L87 Difference]: Start difference. First operand 354 states and 444 transitions. Second operand has 16 states, 15 states have (on average 5.2) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:58,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:10:58,717 INFO L93 Difference]: Finished difference Result 382 states and 467 transitions. [2024-11-28 03:10:58,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:10:58,718 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 5.2) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-28 03:10:58,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:10:58,719 INFO L225 Difference]: With dead ends: 382 [2024-11-28 03:10:58,720 INFO L226 Difference]: Without dead ends: 382 [2024-11-28 03:10:58,721 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:10:58,722 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 206 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:10:58,722 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 477 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:10:58,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2024-11-28 03:10:58,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 352. [2024-11-28 03:10:58,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 324 states have (on average 1.3425925925925926) internal successors, (435), 351 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:58,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 435 transitions. [2024-11-28 03:10:58,733 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 435 transitions. Word has length 35 [2024-11-28 03:10:58,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:10:58,734 INFO L471 AbstractCegarLoop]: Abstraction has 352 states and 435 transitions. [2024-11-28 03:10:58,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 5.2) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:10:58,734 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 435 transitions. [2024-11-28 03:10:58,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 03:10:58,736 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:10:58,736 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:10:58,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 03:10:58,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 03:10:58,936 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:10:58,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:10:58,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1308216349, now seen corresponding path program 1 times [2024-11-28 03:10:58,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:10:58,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584910674] [2024-11-28 03:10:58,937 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:10:58,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:10:58,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:10:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:10:59,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:10:59,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584910674] [2024-11-28 03:10:59,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584910674] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:10:59,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635245888] [2024-11-28 03:10:59,662 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:10:59,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:10:59,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:10:59,665 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:10:59,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:10:59,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:10:59,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 03:10:59,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:10:59,840 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 [2024-11-28 03:10:59,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:10:59,927 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 [2024-11-28 03:10:59,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:10:59,992 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 [2024-11-28 03:11:00,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:11:00,047 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 [2024-11-28 03:11:00,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:11:00,102 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 [2024-11-28 03:11:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 03:11:00,162 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:11:04,454 WARN L851 $PredicateComparison]: unable to prove that (and (<= 0 |c_ULTIMATE.start_sll_append_~head#1.offset|) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_21| Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_21| 1)) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_20| Int) (v_ArrVal_352 Int)) (or (forall ((v_ArrVal_353 Int)) (<= (+ |c_ULTIMATE.start_sll_append_~head#1.offset| 4) (select (store (store |c_#length| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_21| v_ArrVal_352) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_20| v_ArrVal_353) |c_ULTIMATE.start_sll_append_~head#1.base|))) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_20| 1))))))) is different from false [2024-11-28 03:11:08,650 WARN L851 $PredicateComparison]: unable to prove that (and (<= 0 |c_ULTIMATE.start_sll_append_~head#1.offset|) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_22| Int)) (or (forall ((v_ArrVal_351 Int) (|v_ULTIMATE.start_sll_create_~new_head~0#1.base_21| Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_21| 1)) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_20| Int) (v_ArrVal_352 Int)) (or (forall ((v_ArrVal_353 Int)) (<= (+ |c_ULTIMATE.start_sll_append_~head#1.offset| 4) (select (store (store (store |c_#length| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_22| v_ArrVal_351) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_21| v_ArrVal_352) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_20| v_ArrVal_353) |c_ULTIMATE.start_sll_append_~head#1.base|))) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_20| 1)))))) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_22| 1))))) is different from false [2024-11-28 03:11:12,865 WARN L851 $PredicateComparison]: unable to prove that (and (<= 0 |c_ULTIMATE.start_main_~#head~1#1.offset|) (forall ((|v_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base_19| Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base_19| 1)) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_22| Int) (v_ArrVal_350 Int)) (or (forall ((v_ArrVal_351 Int) (|v_ULTIMATE.start_sll_create_~new_head~0#1.base_21| Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_21| 1)) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_20| Int) (v_ArrVal_352 Int)) (or (forall ((v_ArrVal_353 Int)) (<= (+ 4 |c_ULTIMATE.start_main_~#head~1#1.offset|) (select (store (store (store (store |c_#length| |v_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base_19| v_ArrVal_350) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_22| v_ArrVal_351) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_21| v_ArrVal_352) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_20| v_ArrVal_353) |c_ULTIMATE.start_main_~#head~1#1.base|))) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_20| 1)))))) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_22| 1))))))) is different from false [2024-11-28 03:11:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 14 not checked. [2024-11-28 03:11:13,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635245888] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:11:13,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:11:13,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 6] total 13 [2024-11-28 03:11:13,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014141743] [2024-11-28 03:11:13,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:11:13,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:11:13,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:13,141 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:11:13,142 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=78, Unknown=3, NotChecked=60, Total=182 [2024-11-28 03:11:13,142 INFO L87 Difference]: Start difference. First operand 352 states and 435 transitions. Second operand has 14 states, 13 states have (on average 6.230769230769231) internal successors, (81), 14 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:13,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:13,389 INFO L93 Difference]: Finished difference Result 353 states and 429 transitions. [2024-11-28 03:11:13,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:11:13,389 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 6.230769230769231) internal successors, (81), 14 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-28 03:11:13,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:13,391 INFO L225 Difference]: With dead ends: 353 [2024-11-28 03:11:13,391 INFO L226 Difference]: Without dead ends: 353 [2024-11-28 03:11:13,391 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=63, Invalid=102, Unknown=3, NotChecked=72, Total=240 [2024-11-28 03:11:13,392 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 281 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:13,392 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 240 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 269 Unchecked, 0.1s Time] [2024-11-28 03:11:13,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2024-11-28 03:11:13,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 350. [2024-11-28 03:11:13,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 324 states have (on average 1.3148148148148149) internal successors, (426), 349 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:13,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 426 transitions. [2024-11-28 03:11:13,401 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 426 transitions. Word has length 35 [2024-11-28 03:11:13,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:13,401 INFO L471 AbstractCegarLoop]: Abstraction has 350 states and 426 transitions. [2024-11-28 03:11:13,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 6.230769230769231) internal successors, (81), 14 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:13,402 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 426 transitions. [2024-11-28 03:11:13,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-28 03:11:13,402 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:13,402 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:13,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 03:11:13,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 03:11:13,608 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:11:13,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:13,609 INFO L85 PathProgramCache]: Analyzing trace with hash -539983238, now seen corresponding path program 1 times [2024-11-28 03:11:13,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:13,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132519196] [2024-11-28 03:11:13,609 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:13,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:13,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 03:11:13,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:13,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132519196] [2024-11-28 03:11:13,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132519196] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:13,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:13,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:11:13,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124164328] [2024-11-28 03:11:13,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:13,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:11:13,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:13,861 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:11:13,861 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:11:13,861 INFO L87 Difference]: Start difference. First operand 350 states and 426 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:13,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:13,966 INFO L93 Difference]: Finished difference Result 312 states and 357 transitions. [2024-11-28 03:11:13,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:11:13,966 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-11-28 03:11:13,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:13,968 INFO L225 Difference]: With dead ends: 312 [2024-11-28 03:11:13,968 INFO L226 Difference]: Without dead ends: 312 [2024-11-28 03:11:13,968 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:11:13,968 INFO L435 NwaCegarLoop]: 109 mSDtfsCounter, 26 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:13,969 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 528 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:11:13,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2024-11-28 03:11:13,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 309. [2024-11-28 03:11:13,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 283 states have (on average 1.2508833922261484) internal successors, (354), 308 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:13,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 354 transitions. [2024-11-28 03:11:13,977 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 354 transitions. Word has length 38 [2024-11-28 03:11:13,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:13,977 INFO L471 AbstractCegarLoop]: Abstraction has 309 states and 354 transitions. [2024-11-28 03:11:13,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:13,978 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 354 transitions. [2024-11-28 03:11:13,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-28 03:11:13,978 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:13,978 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:13,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-28 03:11:13,979 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:11:13,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:13,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1890204804, now seen corresponding path program 1 times [2024-11-28 03:11:13,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:13,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453973586] [2024-11-28 03:11:13,979 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:13,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:14,374 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-28 03:11:14,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:14,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453973586] [2024-11-28 03:11:14,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453973586] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:14,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:14,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 03:11:14,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786661915] [2024-11-28 03:11:14,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:14,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 03:11:14,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:14,376 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 03:11:14,378 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:11:14,378 INFO L87 Difference]: Start difference. First operand 309 states and 354 transitions. Second operand has 9 states, 8 states have (on average 5.25) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:14,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:14,782 INFO L93 Difference]: Finished difference Result 318 states and 365 transitions. [2024-11-28 03:11:14,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:11:14,782 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2024-11-28 03:11:14,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:14,783 INFO L225 Difference]: With dead ends: 318 [2024-11-28 03:11:14,784 INFO L226 Difference]: Without dead ends: 318 [2024-11-28 03:11:14,784 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:11:14,784 INFO L435 NwaCegarLoop]: 102 mSDtfsCounter, 121 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:14,785 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 591 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:11:14,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2024-11-28 03:11:14,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 310. [2024-11-28 03:11:14,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 285 states have (on average 1.2526315789473683) internal successors, (357), 309 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:14,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 357 transitions. [2024-11-28 03:11:14,798 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 357 transitions. Word has length 62 [2024-11-28 03:11:14,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:14,798 INFO L471 AbstractCegarLoop]: Abstraction has 310 states and 357 transitions. [2024-11-28 03:11:14,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:14,798 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 357 transitions. [2024-11-28 03:11:14,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-28 03:11:14,799 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:14,799 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:14,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-28 03:11:14,800 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:11:14,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:14,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1890204805, now seen corresponding path program 1 times [2024-11-28 03:11:14,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:14,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267296042] [2024-11-28 03:11:14,801 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:14,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:11:15,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:15,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267296042] [2024-11-28 03:11:15,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267296042] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:11:15,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798890203] [2024-11-28 03:11:15,139 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:15,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:15,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:15,141 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:15,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:11:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:15,327 INFO L256 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 03:11:15,330 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:15,398 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:11:15,399 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:11:15,528 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:11:15,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798890203] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:11:15,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:11:15,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2024-11-28 03:11:15,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023979267] [2024-11-28 03:11:15,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:11:15,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 03:11:15,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:15,530 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 03:11:15,530 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-28 03:11:15,531 INFO L87 Difference]: Start difference. First operand 310 states and 357 transitions. Second operand has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:15,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:15,922 INFO L93 Difference]: Finished difference Result 413 states and 458 transitions. [2024-11-28 03:11:15,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 03:11:15,922 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2024-11-28 03:11:15,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:15,924 INFO L225 Difference]: With dead ends: 413 [2024-11-28 03:11:15,924 INFO L226 Difference]: Without dead ends: 413 [2024-11-28 03:11:15,924 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 116 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2024-11-28 03:11:15,925 INFO L435 NwaCegarLoop]: 235 mSDtfsCounter, 266 mSDsluCounter, 1835 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 2070 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:15,925 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 2070 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:11:15,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2024-11-28 03:11:15,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 362. [2024-11-28 03:11:15,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 337 states have (on average 1.2551928783382789) internal successors, (423), 361 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:15,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 423 transitions. [2024-11-28 03:11:15,935 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 423 transitions. Word has length 62 [2024-11-28 03:11:15,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:15,936 INFO L471 AbstractCegarLoop]: Abstraction has 362 states and 423 transitions. [2024-11-28 03:11:15,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:15,936 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 423 transitions. [2024-11-28 03:11:15,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-28 03:11:15,937 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:15,937 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:15,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 03:11:16,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-28 03:11:16,142 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:11:16,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:16,142 INFO L85 PathProgramCache]: Analyzing trace with hash 680031297, now seen corresponding path program 2 times [2024-11-28 03:11:16,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:16,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410837747] [2024-11-28 03:11:16,142 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:11:16,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:16,179 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:11:16,180 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:11:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-28 03:11:16,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:16,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410837747] [2024-11-28 03:11:16,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410837747] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:16,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:16,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 03:11:16,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20014660] [2024-11-28 03:11:16,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:16,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 03:11:16,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:16,783 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 03:11:16,783 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:11:16,783 INFO L87 Difference]: Start difference. First operand 362 states and 423 transitions. Second operand has 9 states, 8 states have (on average 5.25) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:17,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:17,208 INFO L93 Difference]: Finished difference Result 408 states and 483 transitions. [2024-11-28 03:11:17,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:11:17,208 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2024-11-28 03:11:17,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:17,213 INFO L225 Difference]: With dead ends: 408 [2024-11-28 03:11:17,214 INFO L226 Difference]: Without dead ends: 408 [2024-11-28 03:11:17,214 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:11:17,216 INFO L435 NwaCegarLoop]: 102 mSDtfsCounter, 140 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:17,218 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 581 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:11:17,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2024-11-28 03:11:17,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 397. [2024-11-28 03:11:17,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 372 states have (on average 1.2768817204301075) internal successors, (475), 396 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:17,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 475 transitions. [2024-11-28 03:11:17,231 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 475 transitions. Word has length 62 [2024-11-28 03:11:17,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:17,232 INFO L471 AbstractCegarLoop]: Abstraction has 397 states and 475 transitions. [2024-11-28 03:11:17,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:17,233 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 475 transitions. [2024-11-28 03:11:17,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-28 03:11:17,234 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:17,234 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:17,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-28 03:11:17,234 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:11:17,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:17,235 INFO L85 PathProgramCache]: Analyzing trace with hash -393816501, now seen corresponding path program 1 times [2024-11-28 03:11:17,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:17,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830345815] [2024-11-28 03:11:17,235 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:17,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:17,362 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-28 03:11:17,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:17,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830345815] [2024-11-28 03:11:17,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830345815] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:17,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:17,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:11:17,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278070333] [2024-11-28 03:11:17,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:17,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:11:17,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:17,364 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:11:17,364 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:11:17,364 INFO L87 Difference]: Start difference. First operand 397 states and 475 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:17,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:17,453 INFO L93 Difference]: Finished difference Result 470 states and 554 transitions. [2024-11-28 03:11:17,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:11:17,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2024-11-28 03:11:17,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:17,455 INFO L225 Difference]: With dead ends: 470 [2024-11-28 03:11:17,455 INFO L226 Difference]: Without dead ends: 470 [2024-11-28 03:11:17,456 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:11:17,456 INFO L435 NwaCegarLoop]: 100 mSDtfsCounter, 127 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:17,457 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 255 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:11:17,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2024-11-28 03:11:17,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 395. [2024-11-28 03:11:17,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 370 states have (on average 1.272972972972973) internal successors, (471), 394 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:17,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 471 transitions. [2024-11-28 03:11:17,467 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 471 transitions. Word has length 63 [2024-11-28 03:11:17,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:17,468 INFO L471 AbstractCegarLoop]: Abstraction has 395 states and 471 transitions. [2024-11-28 03:11:17,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:17,468 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 471 transitions. [2024-11-28 03:11:17,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-28 03:11:17,471 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:17,471 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:17,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-28 03:11:17,472 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:11:17,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:17,472 INFO L85 PathProgramCache]: Analyzing trace with hash -390113442, now seen corresponding path program 1 times [2024-11-28 03:11:17,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:17,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585976808] [2024-11-28 03:11:17,473 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:17,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:17,697 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-28 03:11:17,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:17,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585976808] [2024-11-28 03:11:17,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585976808] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:17,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:17,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 03:11:17,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281408330] [2024-11-28 03:11:17,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:17,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:11:17,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:17,699 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:11:17,699 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:11:17,700 INFO L87 Difference]: Start difference. First operand 395 states and 471 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:17,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:17,830 INFO L93 Difference]: Finished difference Result 409 states and 482 transitions. [2024-11-28 03:11:17,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:11:17,831 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2024-11-28 03:11:17,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:17,832 INFO L225 Difference]: With dead ends: 409 [2024-11-28 03:11:17,832 INFO L226 Difference]: Without dead ends: 409 [2024-11-28 03:11:17,833 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:11:17,833 INFO L435 NwaCegarLoop]: 100 mSDtfsCounter, 56 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:17,833 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 573 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:11:17,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2024-11-28 03:11:17,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 400. [2024-11-28 03:11:17,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 375 states have (on average 1.2693333333333334) internal successors, (476), 399 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:17,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 476 transitions. [2024-11-28 03:11:17,844 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 476 transitions. Word has length 63 [2024-11-28 03:11:17,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:17,845 INFO L471 AbstractCegarLoop]: Abstraction has 400 states and 476 transitions. [2024-11-28 03:11:17,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:17,845 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 476 transitions. [2024-11-28 03:11:17,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-28 03:11:17,849 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:17,849 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:17,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-28 03:11:17,849 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:11:17,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:17,850 INFO L85 PathProgramCache]: Analyzing trace with hash 791388556, now seen corresponding path program 1 times [2024-11-28 03:11:17,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:17,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395437447] [2024-11-28 03:11:17,850 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:17,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-28 03:11:18,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:18,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395437447] [2024-11-28 03:11:18,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395437447] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:18,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:18,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 03:11:18,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981842640] [2024-11-28 03:11:18,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:18,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 03:11:18,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:18,143 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 03:11:18,143 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:11:18,143 INFO L87 Difference]: Start difference. First operand 400 states and 476 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:18,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:18,359 INFO L93 Difference]: Finished difference Result 404 states and 472 transitions. [2024-11-28 03:11:18,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:11:18,360 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2024-11-28 03:11:18,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:18,362 INFO L225 Difference]: With dead ends: 404 [2024-11-28 03:11:18,362 INFO L226 Difference]: Without dead ends: 404 [2024-11-28 03:11:18,362 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-11-28 03:11:18,363 INFO L435 NwaCegarLoop]: 117 mSDtfsCounter, 133 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:18,363 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 697 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:11:18,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2024-11-28 03:11:18,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 395. [2024-11-28 03:11:18,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 370 states have (on average 1.2594594594594595) internal successors, (466), 394 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:18,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 466 transitions. [2024-11-28 03:11:18,379 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 466 transitions. Word has length 64 [2024-11-28 03:11:18,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:18,379 INFO L471 AbstractCegarLoop]: Abstraction has 395 states and 466 transitions. [2024-11-28 03:11:18,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:18,380 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 466 transitions. [2024-11-28 03:11:18,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-28 03:11:18,380 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:18,380 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:18,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-28 03:11:18,381 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:11:18,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:18,385 INFO L85 PathProgramCache]: Analyzing trace with hash 183475079, now seen corresponding path program 1 times [2024-11-28 03:11:18,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:18,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919290737] [2024-11-28 03:11:18,385 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:18,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:19,941 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-28 03:11:19,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:19,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919290737] [2024-11-28 03:11:19,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919290737] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:19,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:19,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2024-11-28 03:11:19,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453095129] [2024-11-28 03:11:19,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:19,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:11:19,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:19,943 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:11:19,943 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:11:19,944 INFO L87 Difference]: Start difference. First operand 395 states and 466 transitions. Second operand has 17 states, 16 states have (on average 3.0) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:20,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:20,609 INFO L93 Difference]: Finished difference Result 540 states and 652 transitions. [2024-11-28 03:11:20,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 03:11:20,609 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2024-11-28 03:11:20,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:20,611 INFO L225 Difference]: With dead ends: 540 [2024-11-28 03:11:20,612 INFO L226 Difference]: Without dead ends: 540 [2024-11-28 03:11:20,612 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2024-11-28 03:11:20,613 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 129 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:20,614 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 843 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 03:11:20,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2024-11-28 03:11:20,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 456. [2024-11-28 03:11:20,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 431 states have (on average 1.2761020881670533) internal successors, (550), 455 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:20,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 550 transitions. [2024-11-28 03:11:20,626 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 550 transitions. Word has length 66 [2024-11-28 03:11:20,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:20,627 INFO L471 AbstractCegarLoop]: Abstraction has 456 states and 550 transitions. [2024-11-28 03:11:20,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:20,627 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 550 transitions. [2024-11-28 03:11:20,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-28 03:11:20,629 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:20,629 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:20,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-28 03:11:20,630 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:11:20,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:20,631 INFO L85 PathProgramCache]: Analyzing trace with hash 183475080, now seen corresponding path program 1 times [2024-11-28 03:11:20,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:20,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417967304] [2024-11-28 03:11:20,631 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:20,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 03:11:22,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:22,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417967304] [2024-11-28 03:11:22,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417967304] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:11:22,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:11:22,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2024-11-28 03:11:22,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244055197] [2024-11-28 03:11:22,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:11:22,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:11:22,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:11:22,291 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:11:22,291 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:11:22,291 INFO L87 Difference]: Start difference. First operand 456 states and 550 transitions. Second operand has 17 states, 16 states have (on average 3.125) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:23,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:11:23,545 INFO L93 Difference]: Finished difference Result 648 states and 779 transitions. [2024-11-28 03:11:23,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 03:11:23,545 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.125) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2024-11-28 03:11:23,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:11:23,548 INFO L225 Difference]: With dead ends: 648 [2024-11-28 03:11:23,548 INFO L226 Difference]: Without dead ends: 648 [2024-11-28 03:11:23,549 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2024-11-28 03:11:23,550 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 172 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 03:11:23,550 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 861 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 03:11:23,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2024-11-28 03:11:23,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 456. [2024-11-28 03:11:23,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 431 states have (on average 1.271461716937355) internal successors, (548), 455 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:23,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 548 transitions. [2024-11-28 03:11:23,564 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 548 transitions. Word has length 66 [2024-11-28 03:11:23,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:11:23,565 INFO L471 AbstractCegarLoop]: Abstraction has 456 states and 548 transitions. [2024-11-28 03:11:23,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.125) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:11:23,565 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 548 transitions. [2024-11-28 03:11:23,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-28 03:11:23,566 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:11:23,566 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:11:23,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-28 03:11:23,567 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:11:23,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:11:23,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1957026688, now seen corresponding path program 1 times [2024-11-28 03:11:23,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:11:23,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636492812] [2024-11-28 03:11:23,568 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:23,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:11:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 03:11:26,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:11:26,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636492812] [2024-11-28 03:11:26,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636492812] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:11:26,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495484754] [2024-11-28 03:11:26,283 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:11:26,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:11:26,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:11:26,286 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:11:26,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:11:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:11:26,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-11-28 03:11:26,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:11:26,750 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 [2024-11-28 03:11:26,954 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-28 03:11:26,954 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 [2024-11-28 03:11:27,097 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 [2024-11-28 03:11:27,525 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 45 treesize of output 25 [2024-11-28 03:11:27,546 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 [2024-11-28 03:11:27,690 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2024-11-28 03:11:27,690 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 41 treesize of output 38 [2024-11-28 03:11:27,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-28 03:11:28,119 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-28 03:11:28,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 55 treesize of output 40 [2024-11-28 03:11:28,143 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2024-11-28 03:11:28,381 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 [2024-11-28 03:11:28,391 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 [2024-11-28 03:11:30,469 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:11:30,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 205 treesize of output 193 [2024-11-28 03:11:30,537 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:11:30,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 149 treesize of output 181 [2024-11-28 03:11:33,348 INFO L349 Elim1Store]: treesize reduction 16, result has 89.0 percent of original size [2024-11-28 03:11:33,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 36 case distinctions, treesize of input 140 treesize of output 222 [2024-11-28 03:11:33,428 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:11:33,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 92 treesize of output 136 [2024-11-28 03:11:41,225 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 03:11:41,226 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:11:42,067 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 474 treesize of output 442 [2024-11-28 03:11:42,073 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 662 treesize of output 598 [2024-11-28 03:13:10,184 WARN L286 SmtUtils]: Spent 1.36m on a formula simplification. DAG size of input: 1851 DAG size of output: 1551 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-28 03:13:10,186 INFO L349 Elim1Store]: treesize reduction 3570, result has 74.6 percent of original size [2024-11-28 03:13:10,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 32 select indices, 32 select index equivalence classes, 0 disjoint index pairs (out of 496 index pairs), introduced 37 new quantified variables, introduced 496 case distinctions, treesize of input 16950 treesize of output 25645 [2024-11-28 03:13:16,205 WARN L286 SmtUtils]: Spent 6.00s on a formula simplification. DAG size of input: 2574 DAG size of output: 2386 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 03:18:56,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2024-11-28 03:18:56,946 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-28 03:18:56,948 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-28 03:18:56,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 03:18:57,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-28 03:18:57,149 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:281) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:275) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:499) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:484) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:590) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:728) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:234) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:395) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:267) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:325) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:181) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:428) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:314) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:275) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:132) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 68 more [2024-11-28 03:18:57,154 INFO L158 Benchmark]: Toolchain (without parser) took 487969.63ms. Allocated memory was 142.6MB in the beginning and 931.1MB in the end (delta: 788.5MB). Free memory was 117.4MB in the beginning and 442.2MB in the end (delta: -324.8MB). Peak memory consumption was 572.8MB. Max. memory is 16.1GB. [2024-11-28 03:18:57,154 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 142.6MB. Free memory is still 80.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:18:57,154 INFO L158 Benchmark]: CACSL2BoogieTranslator took 587.37ms. Allocated memory is still 142.6MB. Free memory was 117.2MB in the beginning and 98.7MB in the end (delta: 18.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 03:18:57,155 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.97ms. Allocated memory is still 142.6MB. Free memory was 98.7MB in the beginning and 96.7MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:18:57,155 INFO L158 Benchmark]: Boogie Preprocessor took 82.69ms. Allocated memory is still 142.6MB. Free memory was 96.7MB in the beginning and 93.7MB in the end (delta: 3.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 03:18:57,155 INFO L158 Benchmark]: RCFGBuilder took 792.59ms. Allocated memory is still 142.6MB. Free memory was 93.7MB in the beginning and 68.1MB in the end (delta: 25.6MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-11-28 03:18:57,157 INFO L158 Benchmark]: TraceAbstraction took 486454.23ms. Allocated memory was 142.6MB in the beginning and 931.1MB in the end (delta: 788.5MB). Free memory was 67.4MB in the beginning and 442.2MB in the end (delta: -374.8MB). Peak memory consumption was 522.4MB. Max. memory is 16.1GB. [2024-11-28 03:18:57,158 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 142.6MB. Free memory is still 80.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 587.37ms. Allocated memory is still 142.6MB. Free memory was 117.2MB in the beginning and 98.7MB in the end (delta: 18.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.97ms. Allocated memory is still 142.6MB. Free memory was 98.7MB in the beginning and 96.7MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 82.69ms. Allocated memory is still 142.6MB. Free memory was 96.7MB in the beginning and 93.7MB in the end (delta: 3.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 792.59ms. Allocated memory is still 142.6MB. Free memory was 93.7MB in the beginning and 68.1MB in the end (delta: 25.6MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 486454.23ms. Allocated memory was 142.6MB in the beginning and 931.1MB in the end (delta: 788.5MB). Free memory was 67.4MB in the beginning and 442.2MB in the end (delta: -374.8MB). Peak memory consumption was 522.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fabf091179f48b7141dc193b5040f4974c042bd8a2afb03b99137d693bf63ce7 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:18:59,577 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:18:59,712 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-11-28 03:18:59,721 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:18:59,724 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:18:59,765 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:18:59,766 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:18:59,766 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:18:59,767 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:18:59,768 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:18:59,769 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:18:59,769 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:18:59,769 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:18:59,769 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:18:59,770 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:18:59,770 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:18:59,770 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:18:59,770 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:18:59,770 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:18:59,770 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:18:59,771 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 03:18:59,771 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 03:18:59,771 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 03:18:59,771 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:18:59,771 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 03:18:59,771 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-28 03:18:59,772 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-28 03:18:59,772 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 03:18:59,772 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:18:59,772 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:18:59,772 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:18:59,772 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:18:59,772 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:18:59,774 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:18:59,774 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:18:59,774 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:18:59,774 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:18:59,774 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:18:59,774 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:18:59,775 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:18:59,775 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:18:59,775 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:18:59,775 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:18:59,775 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-28 03:18:59,775 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-28 03:18:59,775 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:18:59,775 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:18:59,775 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:18:59,775 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:18:59,775 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB 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 -> Automizer 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 -> fabf091179f48b7141dc193b5040f4974c042bd8a2afb03b99137d693bf63ce7 [2024-11-28 03:19:00,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:19:00,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:19:00,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:19:00,098 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:19:00,098 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:19:00,099 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i [2024-11-28 03:19:03,306 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/data/7f896ef95/6e9b7d3ef8ce4102a3c989c0a83340c7/FLAG2d560b15a [2024-11-28 03:19:03,765 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:19:03,766 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i [2024-11-28 03:19:03,792 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/data/7f896ef95/6e9b7d3ef8ce4102a3c989c0a83340c7/FLAG2d560b15a [2024-11-28 03:19:03,815 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/data/7f896ef95/6e9b7d3ef8ce4102a3c989c0a83340c7 [2024-11-28 03:19:03,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:19:03,823 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:19:03,826 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:19:03,826 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:19:03,834 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:19:03,837 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:19:03" (1/1) ... [2024-11-28 03:19:03,838 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c186a25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:03, skipping insertion in model container [2024-11-28 03:19:03,838 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:19:03" (1/1) ... [2024-11-28 03:19:03,883 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:19:04,269 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:19:04,282 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:19:04,355 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:19:04,400 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:19:04,401 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:04 WrapperNode [2024-11-28 03:19:04,402 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:19:04,403 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:19:04,403 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:19:04,403 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:19:04,411 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:04" (1/1) ... [2024-11-28 03:19:04,438 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:04" (1/1) ... [2024-11-28 03:19:04,477 INFO L138 Inliner]: procedures = 130, calls = 40, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 181 [2024-11-28 03:19:04,480 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:19:04,481 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:19:04,483 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:19:04,483 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:19:04,494 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:04" (1/1) ... [2024-11-28 03:19:04,495 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:04" (1/1) ... [2024-11-28 03:19:04,503 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:04" (1/1) ... [2024-11-28 03:19:04,548 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 5, 13]. 65 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0]. The 6 writes are split as follows [0, 1, 5]. [2024-11-28 03:19:04,551 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:04" (1/1) ... [2024-11-28 03:19:04,552 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:04" (1/1) ... [2024-11-28 03:19:04,572 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:04" (1/1) ... [2024-11-28 03:19:04,577 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:04" (1/1) ... [2024-11-28 03:19:04,582 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:04" (1/1) ... [2024-11-28 03:19:04,587 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:04" (1/1) ... [2024-11-28 03:19:04,593 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:04" (1/1) ... [2024-11-28 03:19:04,600 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:19:04,602 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:19:04,602 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:19:04,605 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:19:04,606 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:04" (1/1) ... [2024-11-28 03:19:04,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:19:04,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:04,659 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:19:04,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:19:04,701 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2024-11-28 03:19:04,702 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2024-11-28 03:19:04,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 03:19:04,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:19:04,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 03:19:04,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-28 03:19:04,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-28 03:19:04,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-28 03:19:04,703 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-28 03:19:04,703 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-28 03:19:04,703 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-28 03:19:04,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 03:19:04,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-28 03:19:04,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-28 03:19:04,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-28 03:19:04,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-28 03:19:04,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-28 03:19:04,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-28 03:19:04,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:19:04,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:19:04,872 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:19:04,873 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:19:04,902 INFO L727 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2024-11-28 03:19:05,565 INFO L? ?]: Removed 130 outVars from TransFormulas that were not future-live. [2024-11-28 03:19:05,566 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:19:05,577 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:19:05,578 INFO L312 CfgBuilder]: Removed 9 assume(true) statements. [2024-11-28 03:19:05,578 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:19:05 BoogieIcfgContainer [2024-11-28 03:19:05,578 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:19:05,580 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:19:05,581 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:19:05,587 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:19:05,587 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:19:03" (1/3) ... [2024-11-28 03:19:05,588 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@94ffb84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:19:05, skipping insertion in model container [2024-11-28 03:19:05,588 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:04" (2/3) ... [2024-11-28 03:19:05,590 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@94ffb84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:19:05, skipping insertion in model container [2024-11-28 03:19:05,590 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:19:05" (3/3) ... [2024-11-28 03:19:05,592 INFO L128 eAbstractionObserver]: Analyzing ICFG sll_of_sll_nondet_append-1.i [2024-11-28 03:19:05,608 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:19:05,610 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sll_of_sll_nondet_append-1.i that has 2 procedures, 125 locations, 1 initial locations, 9 loop locations, and 42 error locations. [2024-11-28 03:19:05,654 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:19:05,666 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=PETRI_NET, 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;@45398e6f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:19:05,666 INFO L334 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2024-11-28 03:19:05,670 INFO L276 IsEmpty]: Start isEmpty. Operand has 124 states, 79 states have (on average 1.8734177215189873) internal successors, (148), 122 states have internal predecessors, (148), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:05,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-28 03:19:05,675 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:05,676 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-28 03:19:05,676 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:19:05,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:05,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1083175, now seen corresponding path program 1 times [2024-11-28 03:19:05,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:19:05,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254465558] [2024-11-28 03:19:05,692 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:05,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:05,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:05,697 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:05,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:19:05,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:05,829 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-28 03:19:05,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:05,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:05,856 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:19:05,857 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:19:05,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254465558] [2024-11-28 03:19:05,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254465558] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:05,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:05,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:19:05,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007005150] [2024-11-28 03:19:05,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:05,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 03:19:05,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:19:05,896 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 03:19:05,897 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 03:19:05,899 INFO L87 Difference]: Start difference. First operand has 124 states, 79 states have (on average 1.8734177215189873) internal successors, (148), 122 states have internal predecessors, (148), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:05,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:05,918 INFO L93 Difference]: Finished difference Result 123 states and 138 transitions. [2024-11-28 03:19:05,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 03:19:05,920 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-28 03:19:05,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:05,928 INFO L225 Difference]: With dead ends: 123 [2024-11-28 03:19:05,928 INFO L226 Difference]: Without dead ends: 117 [2024-11-28 03:19:05,930 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 03:19:05,933 INFO L435 NwaCegarLoop]: 138 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:05,934 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:19:05,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-28 03:19:05,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2024-11-28 03:19:05,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 75 states have (on average 1.7333333333333334) internal successors, (130), 116 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:05,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 130 transitions. [2024-11-28 03:19:06,000 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 130 transitions. Word has length 4 [2024-11-28 03:19:06,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:06,001 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 130 transitions. [2024-11-28 03:19:06,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:06,001 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 130 transitions. [2024-11-28 03:19:06,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-28 03:19:06,001 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:06,001 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-28 03:19:06,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 03:19:06,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:06,202 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:19:06,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:06,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1079796, now seen corresponding path program 1 times [2024-11-28 03:19:06,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:19:06,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636536407] [2024-11-28 03:19:06,204 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:06,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:06,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:06,207 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:06,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:19:06,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:06,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 03:19:06,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:06,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:06,332 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:19:06,332 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:19:06,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636536407] [2024-11-28 03:19:06,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636536407] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:06,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:06,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:19:06,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412610729] [2024-11-28 03:19:06,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:06,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:19:06,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:19:06,336 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:19:06,336 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:19:06,336 INFO L87 Difference]: Start difference. First operand 117 states and 130 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:06,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:06,410 INFO L93 Difference]: Finished difference Result 167 states and 185 transitions. [2024-11-28 03:19:06,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:19:06,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-28 03:19:06,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:06,412 INFO L225 Difference]: With dead ends: 167 [2024-11-28 03:19:06,414 INFO L226 Difference]: Without dead ends: 167 [2024-11-28 03:19:06,414 INFO L434 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 [2024-11-28 03:19:06,415 INFO L435 NwaCegarLoop]: 127 mSDtfsCounter, 54 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:06,416 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 242 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:19:06,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-11-28 03:19:06,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 118. [2024-11-28 03:19:06,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 76 states have (on average 1.7236842105263157) internal successors, (131), 117 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:06,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 131 transitions. [2024-11-28 03:19:06,433 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 131 transitions. Word has length 4 [2024-11-28 03:19:06,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:06,434 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 131 transitions. [2024-11-28 03:19:06,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:06,434 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 131 transitions. [2024-11-28 03:19:06,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 03:19:06,434 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:06,434 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:06,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 03:19:06,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:06,635 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:19:06,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:06,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1462008149, now seen corresponding path program 1 times [2024-11-28 03:19:06,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:19:06,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075055986] [2024-11-28 03:19:06,637 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:06,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:06,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:06,639 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:06,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:19:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:06,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:19:06,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:06,834 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:19:06,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:06,902 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:19:06,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075055986] [2024-11-28 03:19:06,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075055986] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:19:06,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:19:06,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2024-11-28 03:19:06,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498879731] [2024-11-28 03:19:06,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:19:06,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:19:06,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:19:06,905 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:19:06,905 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:19:06,905 INFO L87 Difference]: Start difference. First operand 118 states and 131 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:07,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:07,074 INFO L93 Difference]: Finished difference Result 255 states and 280 transitions. [2024-11-28 03:19:07,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:19:07,075 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-28 03:19:07,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:07,076 INFO L225 Difference]: With dead ends: 255 [2024-11-28 03:19:07,076 INFO L226 Difference]: Without dead ends: 255 [2024-11-28 03:19:07,076 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:19:07,077 INFO L435 NwaCegarLoop]: 208 mSDtfsCounter, 418 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:07,077 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 506 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:19:07,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2024-11-28 03:19:07,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 185. [2024-11-28 03:19:07,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 143 states have (on average 1.7132867132867133) internal successors, (245), 184 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:07,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 245 transitions. [2024-11-28 03:19:07,089 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 245 transitions. Word has length 10 [2024-11-28 03:19:07,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:07,090 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 245 transitions. [2024-11-28 03:19:07,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:07,090 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 245 transitions. [2024-11-28 03:19:07,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 03:19:07,091 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:07,091 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:07,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 03:19:07,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:07,295 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:19:07,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:07,295 INFO L85 PathProgramCache]: Analyzing trace with hash -99947209, now seen corresponding path program 1 times [2024-11-28 03:19:07,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:19:07,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1160049408] [2024-11-28 03:19:07,296 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:07,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:07,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:07,300 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:07,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:19:07,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:07,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 03:19:07,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:07,437 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 7 [2024-11-28 03:19:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:07,451 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:19:07,452 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:19:07,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160049408] [2024-11-28 03:19:07,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160049408] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:07,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:07,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:19:07,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649787261] [2024-11-28 03:19:07,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:07,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:19:07,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:19:07,454 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:19:07,455 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:19:07,455 INFO L87 Difference]: Start difference. First operand 185 states and 245 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:07,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:07,640 INFO L93 Difference]: Finished difference Result 184 states and 242 transitions. [2024-11-28 03:19:07,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:19:07,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-28 03:19:07,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:07,642 INFO L225 Difference]: With dead ends: 184 [2024-11-28 03:19:07,642 INFO L226 Difference]: Without dead ends: 184 [2024-11-28 03:19:07,642 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:19:07,644 INFO L435 NwaCegarLoop]: 125 mSDtfsCounter, 1 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:07,644 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 206 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:19:07,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-11-28 03:19:07,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2024-11-28 03:19:07,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 143 states have (on average 1.6923076923076923) internal successors, (242), 183 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:07,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 242 transitions. [2024-11-28 03:19:07,662 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 242 transitions. Word has length 14 [2024-11-28 03:19:07,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:07,662 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 242 transitions. [2024-11-28 03:19:07,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:07,662 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 242 transitions. [2024-11-28 03:19:07,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 03:19:07,663 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:07,663 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:07,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 03:19:07,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:07,864 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:19:07,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:07,864 INFO L85 PathProgramCache]: Analyzing trace with hash -99947208, now seen corresponding path program 1 times [2024-11-28 03:19:07,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:19:07,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303976208] [2024-11-28 03:19:07,865 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:07,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:07,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:07,867 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:07,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:19:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:07,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 03:19:07,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:07,960 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 [2024-11-28 03:19:07,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:07,980 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:19:07,980 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:19:07,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303976208] [2024-11-28 03:19:07,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303976208] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:07,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:07,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:19:07,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578570344] [2024-11-28 03:19:07,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:07,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:19:07,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:19:07,982 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:19:07,982 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:19:07,982 INFO L87 Difference]: Start difference. First operand 184 states and 242 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:08,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:08,173 INFO L93 Difference]: Finished difference Result 183 states and 239 transitions. [2024-11-28 03:19:08,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:19:08,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-28 03:19:08,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:08,175 INFO L225 Difference]: With dead ends: 183 [2024-11-28 03:19:08,176 INFO L226 Difference]: Without dead ends: 183 [2024-11-28 03:19:08,176 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:19:08,177 INFO L435 NwaCegarLoop]: 125 mSDtfsCounter, 1 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:08,177 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 212 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:19:08,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-28 03:19:08,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2024-11-28 03:19:08,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 143 states have (on average 1.6713286713286712) internal successors, (239), 182 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:08,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 239 transitions. [2024-11-28 03:19:08,185 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 239 transitions. Word has length 14 [2024-11-28 03:19:08,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:08,185 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 239 transitions. [2024-11-28 03:19:08,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:08,185 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 239 transitions. [2024-11-28 03:19:08,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 03:19:08,186 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:08,186 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:08,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 03:19:08,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:08,387 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:19:08,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:08,387 INFO L85 PathProgramCache]: Analyzing trace with hash -99872861, now seen corresponding path program 1 times [2024-11-28 03:19:08,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:19:08,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1124745404] [2024-11-28 03:19:08,387 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:08,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:08,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:08,390 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:08,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:19:08,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:08,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 03:19:08,483 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:08,490 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 7 [2024-11-28 03:19:08,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:08,527 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:19:08,527 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:19:08,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124745404] [2024-11-28 03:19:08,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124745404] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:08,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:08,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:19:08,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142466442] [2024-11-28 03:19:08,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:08,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:19:08,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:19:08,528 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:19:08,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:19:08,529 INFO L87 Difference]: Start difference. First operand 183 states and 239 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:08,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:08,686 INFO L93 Difference]: Finished difference Result 181 states and 233 transitions. [2024-11-28 03:19:08,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:19:08,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-28 03:19:08,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:08,688 INFO L225 Difference]: With dead ends: 181 [2024-11-28 03:19:08,688 INFO L226 Difference]: Without dead ends: 181 [2024-11-28 03:19:08,688 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:19:08,689 INFO L435 NwaCegarLoop]: 118 mSDtfsCounter, 7 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:08,689 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 190 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:19:08,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-28 03:19:08,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2024-11-28 03:19:08,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 143 states have (on average 1.6293706293706294) internal successors, (233), 180 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:08,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 233 transitions. [2024-11-28 03:19:08,705 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 233 transitions. Word has length 14 [2024-11-28 03:19:08,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:08,705 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 233 transitions. [2024-11-28 03:19:08,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:08,705 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 233 transitions. [2024-11-28 03:19:08,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 03:19:08,706 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:08,706 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:08,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 03:19:08,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:08,906 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:19:08,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:08,907 INFO L85 PathProgramCache]: Analyzing trace with hash -99872860, now seen corresponding path program 1 times [2024-11-28 03:19:08,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:19:08,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418334025] [2024-11-28 03:19:08,907 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:08,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:08,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:08,909 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:08,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:19:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:08,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:19:08,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:09,035 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:19:09,035 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:19:09,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418334025] [2024-11-28 03:19:09,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418334025] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:09,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:09,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:19:09,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524734459] [2024-11-28 03:19:09,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:09,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:19:09,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:19:09,036 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:19:09,036 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:19:09,037 INFO L87 Difference]: Start difference. First operand 181 states and 233 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:09,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:09,118 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2024-11-28 03:19:09,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:19:09,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-28 03:19:09,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:09,120 INFO L225 Difference]: With dead ends: 200 [2024-11-28 03:19:09,120 INFO L226 Difference]: Without dead ends: 200 [2024-11-28 03:19:09,120 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:19:09,121 INFO L435 NwaCegarLoop]: 120 mSDtfsCounter, 54 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:09,121 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 468 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:19:09,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2024-11-28 03:19:09,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 182. [2024-11-28 03:19:09,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 144 states have (on average 1.625) internal successors, (234), 181 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:09,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 234 transitions. [2024-11-28 03:19:09,128 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 234 transitions. Word has length 14 [2024-11-28 03:19:09,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:09,128 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 234 transitions. [2024-11-28 03:19:09,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:09,128 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 234 transitions. [2024-11-28 03:19:09,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-28 03:19:09,129 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:09,129 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:09,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 03:19:09,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:09,330 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:19:09,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:09,331 INFO L85 PathProgramCache]: Analyzing trace with hash -2005505027, now seen corresponding path program 1 times [2024-11-28 03:19:09,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:19:09,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443551145] [2024-11-28 03:19:09,331 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:09,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:09,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:09,333 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:09,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:19:09,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:09,436 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 03:19:09,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:09,523 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:19:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:09,711 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:19:09,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443551145] [2024-11-28 03:19:09,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443551145] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:19:09,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:19:09,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2024-11-28 03:19:09,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698005792] [2024-11-28 03:19:09,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:19:09,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 03:19:09,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:19:09,712 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 03:19:09,712 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:19:09,713 INFO L87 Difference]: Start difference. First operand 182 states and 234 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:10,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:10,041 INFO L93 Difference]: Finished difference Result 227 states and 252 transitions. [2024-11-28 03:19:10,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 03:19:10,042 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-28 03:19:10,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:10,043 INFO L225 Difference]: With dead ends: 227 [2024-11-28 03:19:10,043 INFO L226 Difference]: Without dead ends: 227 [2024-11-28 03:19:10,043 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2024-11-28 03:19:10,044 INFO L435 NwaCegarLoop]: 157 mSDtfsCounter, 126 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:10,044 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 835 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:19:10,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-11-28 03:19:10,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 198. [2024-11-28 03:19:10,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 160 states have (on average 1.56875) internal successors, (251), 197 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:10,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 251 transitions. [2024-11-28 03:19:10,055 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 251 transitions. Word has length 19 [2024-11-28 03:19:10,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:10,056 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 251 transitions. [2024-11-28 03:19:10,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:10,056 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 251 transitions. [2024-11-28 03:19:10,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-28 03:19:10,058 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:10,059 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:10,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 03:19:10,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:10,259 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:19:10,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:10,260 INFO L85 PathProgramCache]: Analyzing trace with hash 236259781, now seen corresponding path program 1 times [2024-11-28 03:19:10,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:19:10,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343450233] [2024-11-28 03:19:10,260 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:10,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:10,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:10,262 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:10,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:19:10,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:10,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 03:19:10,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:10,348 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 [2024-11-28 03:19:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 03:19:10,402 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:19:10,402 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:19:10,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343450233] [2024-11-28 03:19:10,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343450233] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:10,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:10,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:19:10,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463321248] [2024-11-28 03:19:10,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:10,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:19:10,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:19:10,404 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:19:10,404 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:19:10,404 INFO L87 Difference]: Start difference. First operand 198 states and 251 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:10,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:10,573 INFO L93 Difference]: Finished difference Result 196 states and 245 transitions. [2024-11-28 03:19:10,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:19:10,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-28 03:19:10,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:10,575 INFO L225 Difference]: With dead ends: 196 [2024-11-28 03:19:10,575 INFO L226 Difference]: Without dead ends: 196 [2024-11-28 03:19:10,575 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:19:10,575 INFO L435 NwaCegarLoop]: 118 mSDtfsCounter, 7 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:10,576 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 196 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:19:10,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2024-11-28 03:19:10,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2024-11-28 03:19:10,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 160 states have (on average 1.53125) internal successors, (245), 195 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:10,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 245 transitions. [2024-11-28 03:19:10,582 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 245 transitions. Word has length 20 [2024-11-28 03:19:10,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:10,582 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 245 transitions. [2024-11-28 03:19:10,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:10,582 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 245 transitions. [2024-11-28 03:19:10,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 03:19:10,583 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:10,583 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2024-11-28 03:19:10,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 03:19:10,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:10,788 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:19:10,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:10,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1777115607, now seen corresponding path program 2 times [2024-11-28 03:19:10,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:19:10,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097792418] [2024-11-28 03:19:10,788 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:19:10,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:10,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:10,790 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:10,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:19:10,861 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:19:10,861 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:10,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 03:19:10,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:10,884 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 [2024-11-28 03:19:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 03:19:11,048 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:19:11,048 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:19:11,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097792418] [2024-11-28 03:19:11,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097792418] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:11,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:11,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:19:11,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559304778] [2024-11-28 03:19:11,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:11,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:19:11,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:19:11,050 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:19:11,050 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:19:11,050 INFO L87 Difference]: Start difference. First operand 196 states and 245 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:11,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:11,253 INFO L93 Difference]: Finished difference Result 250 states and 315 transitions. [2024-11-28 03:19:11,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:19:11,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-28 03:19:11,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:11,254 INFO L225 Difference]: With dead ends: 250 [2024-11-28 03:19:11,254 INFO L226 Difference]: Without dead ends: 250 [2024-11-28 03:19:11,255 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:19:11,255 INFO L435 NwaCegarLoop]: 113 mSDtfsCounter, 38 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:11,256 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 199 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:19:11,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2024-11-28 03:19:11,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 237. [2024-11-28 03:19:11,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 201 states have (on average 1.537313432835821) internal successors, (309), 236 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:11,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 309 transitions. [2024-11-28 03:19:11,262 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 309 transitions. Word has length 22 [2024-11-28 03:19:11,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:11,263 INFO L471 AbstractCegarLoop]: Abstraction has 237 states and 309 transitions. [2024-11-28 03:19:11,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:11,263 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 309 transitions. [2024-11-28 03:19:11,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 03:19:11,263 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:11,263 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2024-11-28 03:19:11,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 03:19:11,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:11,464 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:19:11,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:11,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1777115606, now seen corresponding path program 1 times [2024-11-28 03:19:11,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:19:11,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15589853] [2024-11-28 03:19:11,465 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:11,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:11,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:11,467 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:11,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 03:19:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:11,533 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 03:19:11,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:11,539 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 7 [2024-11-28 03:19:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 03:19:11,594 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:19:11,594 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:19:11,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15589853] [2024-11-28 03:19:11,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15589853] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:11,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:11,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:19:11,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323153664] [2024-11-28 03:19:11,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:11,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:19:11,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:19:11,595 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:19:11,595 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:19:11,595 INFO L87 Difference]: Start difference. First operand 237 states and 309 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:11,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:11,762 INFO L93 Difference]: Finished difference Result 262 states and 334 transitions. [2024-11-28 03:19:11,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:19:11,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-28 03:19:11,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:11,766 INFO L225 Difference]: With dead ends: 262 [2024-11-28 03:19:11,766 INFO L226 Difference]: Without dead ends: 262 [2024-11-28 03:19:11,766 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:19:11,766 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 105 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:11,767 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 102 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:19:11,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2024-11-28 03:19:11,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 235. [2024-11-28 03:19:11,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 201 states have (on average 1.5174129353233832) internal successors, (305), 234 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:11,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 305 transitions. [2024-11-28 03:19:11,777 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 305 transitions. Word has length 22 [2024-11-28 03:19:11,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:11,777 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 305 transitions. [2024-11-28 03:19:11,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:11,777 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 305 transitions. [2024-11-28 03:19:11,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-28 03:19:11,779 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:11,779 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:11,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 03:19:11,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:11,980 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:19:11,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:11,981 INFO L85 PathProgramCache]: Analyzing trace with hash 596712011, now seen corresponding path program 1 times [2024-11-28 03:19:11,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:19:11,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [239105075] [2024-11-28 03:19:11,981 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:11,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:11,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:11,983 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:11,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 03:19:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:12,071 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 03:19:12,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:12,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 03:19:12,106 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:19:12,106 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:19:12,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239105075] [2024-11-28 03:19:12,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239105075] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:12,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:12,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:19:12,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754659156] [2024-11-28 03:19:12,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:12,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:19:12,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:19:12,108 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:19:12,108 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:19:12,108 INFO L87 Difference]: Start difference. First operand 235 states and 305 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:12,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:12,387 INFO L93 Difference]: Finished difference Result 234 states and 302 transitions. [2024-11-28 03:19:12,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:19:12,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-28 03:19:12,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:12,389 INFO L225 Difference]: With dead ends: 234 [2024-11-28 03:19:12,390 INFO L226 Difference]: Without dead ends: 234 [2024-11-28 03:19:12,390 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:19:12,390 INFO L435 NwaCegarLoop]: 102 mSDtfsCounter, 29 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:12,391 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 319 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:19:12,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2024-11-28 03:19:12,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2024-11-28 03:19:12,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 201 states have (on average 1.5024875621890548) internal successors, (302), 233 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:12,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 302 transitions. [2024-11-28 03:19:12,397 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 302 transitions. Word has length 25 [2024-11-28 03:19:12,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:12,397 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 302 transitions. [2024-11-28 03:19:12,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:12,397 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 302 transitions. [2024-11-28 03:19:12,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-28 03:19:12,398 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:12,398 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:12,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-28 03:19:12,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:12,599 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:19:12,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:12,599 INFO L85 PathProgramCache]: Analyzing trace with hash 596712012, now seen corresponding path program 1 times [2024-11-28 03:19:12,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:19:12,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531235780] [2024-11-28 03:19:12,600 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:12,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:12,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:12,601 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:12,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 03:19:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:12,691 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:19:12,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:12,704 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 [2024-11-28 03:19:12,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 03:19:12,801 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:19:12,801 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:19:12,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531235780] [2024-11-28 03:19:12,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531235780] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:12,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:12,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:19:12,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237646905] [2024-11-28 03:19:12,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:12,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:19:12,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:19:12,802 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:19:12,803 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:19:12,803 INFO L87 Difference]: Start difference. First operand 234 states and 302 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:13,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:13,106 INFO L93 Difference]: Finished difference Result 233 states and 299 transitions. [2024-11-28 03:19:13,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:19:13,107 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-28 03:19:13,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:13,108 INFO L225 Difference]: With dead ends: 233 [2024-11-28 03:19:13,108 INFO L226 Difference]: Without dead ends: 233 [2024-11-28 03:19:13,108 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:19:13,109 INFO L435 NwaCegarLoop]: 102 mSDtfsCounter, 24 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:13,109 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 331 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:19:13,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2024-11-28 03:19:13,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2024-11-28 03:19:13,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 201 states have (on average 1.4875621890547264) internal successors, (299), 232 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:13,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 299 transitions. [2024-11-28 03:19:13,115 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 299 transitions. Word has length 25 [2024-11-28 03:19:13,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:13,115 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 299 transitions. [2024-11-28 03:19:13,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:13,116 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 299 transitions. [2024-11-28 03:19:13,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-28 03:19:13,116 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:13,116 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:13,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 03:19:13,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:13,317 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:19:13,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:13,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1318203210, now seen corresponding path program 1 times [2024-11-28 03:19:13,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:19:13,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [695235140] [2024-11-28 03:19:13,318 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:13,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:13,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:13,319 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:13,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 03:19:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:13,422 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:19:13,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:13,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:13,494 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:19:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:13,587 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:19:13,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695235140] [2024-11-28 03:19:13,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695235140] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:19:13,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:19:13,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-11-28 03:19:13,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000440492] [2024-11-28 03:19:13,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:19:13,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:19:13,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:19:13,588 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:19:13,589 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:19:13,589 INFO L87 Difference]: Start difference. First operand 233 states and 299 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:13,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:13,969 INFO L93 Difference]: Finished difference Result 507 states and 612 transitions. [2024-11-28 03:19:13,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 03:19:13,970 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-28 03:19:13,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:13,972 INFO L225 Difference]: With dead ends: 507 [2024-11-28 03:19:13,972 INFO L226 Difference]: Without dead ends: 507 [2024-11-28 03:19:13,972 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:19:13,973 INFO L435 NwaCegarLoop]: 209 mSDtfsCounter, 594 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 1273 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:13,974 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [594 Valid, 1273 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:19:13,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2024-11-28 03:19:13,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 307. [2024-11-28 03:19:13,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 275 states have (on average 1.4836363636363636) internal successors, (408), 306 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:13,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 408 transitions. [2024-11-28 03:19:13,997 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 408 transitions. Word has length 26 [2024-11-28 03:19:13,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:13,997 INFO L471 AbstractCegarLoop]: Abstraction has 307 states and 408 transitions. [2024-11-28 03:19:13,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:13,997 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 408 transitions. [2024-11-28 03:19:13,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-28 03:19:13,999 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:13,999 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:14,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 03:19:14,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:14,200 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:19:14,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:14,201 INFO L85 PathProgramCache]: Analyzing trace with hash 413244633, now seen corresponding path program 1 times [2024-11-28 03:19:14,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:19:14,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [959937854] [2024-11-28 03:19:14,202 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:14,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:14,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:14,204 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:14,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 03:19:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:14,288 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 03:19:14,289 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 03:19:14,482 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:19:14,483 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:19:14,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959937854] [2024-11-28 03:19:14,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959937854] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:14,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:14,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:19:14,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820211568] [2024-11-28 03:19:14,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:14,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:19:14,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:19:14,484 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:19:14,484 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:19:14,484 INFO L87 Difference]: Start difference. First operand 307 states and 408 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:14,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:14,641 INFO L93 Difference]: Finished difference Result 479 states and 635 transitions. [2024-11-28 03:19:14,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:19:14,642 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-28 03:19:14,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:14,643 INFO L225 Difference]: With dead ends: 479 [2024-11-28 03:19:14,644 INFO L226 Difference]: Without dead ends: 479 [2024-11-28 03:19:14,644 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:19:14,644 INFO L435 NwaCegarLoop]: 114 mSDtfsCounter, 44 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:14,645 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 441 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:19:14,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2024-11-28 03:19:14,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 462. [2024-11-28 03:19:14,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 430 states have (on average 1.4348837209302325) internal successors, (617), 461 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:14,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 617 transitions. [2024-11-28 03:19:14,664 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 617 transitions. Word has length 27 [2024-11-28 03:19:14,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:14,665 INFO L471 AbstractCegarLoop]: Abstraction has 462 states and 617 transitions. [2024-11-28 03:19:14,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:14,665 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 617 transitions. [2024-11-28 03:19:14,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-28 03:19:14,666 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:14,666 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:14,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 03:19:14,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:14,867 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:19:14,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:14,868 INFO L85 PathProgramCache]: Analyzing trace with hash -70565403, now seen corresponding path program 1 times [2024-11-28 03:19:14,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:19:14,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [559370910] [2024-11-28 03:19:14,868 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:14,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:14,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:14,871 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:14,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 03:19:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:14,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:19:14,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 03:19:15,210 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:19:15,210 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:19:15,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559370910] [2024-11-28 03:19:15,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559370910] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:15,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:15,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:19:15,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673734897] [2024-11-28 03:19:15,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:15,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:19:15,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:19:15,212 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:19:15,212 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:19:15,212 INFO L87 Difference]: Start difference. First operand 462 states and 617 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:15,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:15,361 INFO L93 Difference]: Finished difference Result 481 states and 637 transitions. [2024-11-28 03:19:15,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:19:15,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-28 03:19:15,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:15,364 INFO L225 Difference]: With dead ends: 481 [2024-11-28 03:19:15,364 INFO L226 Difference]: Without dead ends: 481 [2024-11-28 03:19:15,364 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:19:15,365 INFO L435 NwaCegarLoop]: 114 mSDtfsCounter, 40 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:15,365 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 435 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:19:15,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2024-11-28 03:19:15,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 466. [2024-11-28 03:19:15,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 434 states have (on average 1.433179723502304) internal successors, (622), 465 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:15,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 622 transitions. [2024-11-28 03:19:15,400 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 622 transitions. Word has length 28 [2024-11-28 03:19:15,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:15,402 INFO L471 AbstractCegarLoop]: Abstraction has 466 states and 622 transitions. [2024-11-28 03:19:15,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:15,403 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 622 transitions. [2024-11-28 03:19:15,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-28 03:19:15,403 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:15,403 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:15,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 03:19:15,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:15,604 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:19:15,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:15,605 INFO L85 PathProgramCache]: Analyzing trace with hash 2107443173, now seen corresponding path program 1 times [2024-11-28 03:19:15,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:19:15,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154237420] [2024-11-28 03:19:15,605 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:15,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:15,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:15,607 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:15,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 03:19:15,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:15,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 03:19:15,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:15,908 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#head~1#1.base_18| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#head~1#1.base_18|)) (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#head~1#1.base_18| (_ bv0 1))))) is different from true [2024-11-28 03:19:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 03:19:15,908 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:19:15,909 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:19:15,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154237420] [2024-11-28 03:19:15,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154237420] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:15,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:15,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:19:15,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130774817] [2024-11-28 03:19:15,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:15,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:19:15,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:19:15,910 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:19:15,910 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=4, Unknown=1, NotChecked=2, Total=12 [2024-11-28 03:19:15,910 INFO L87 Difference]: Start difference. First operand 466 states and 622 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:16,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:16,097 INFO L93 Difference]: Finished difference Result 475 states and 630 transitions. [2024-11-28 03:19:16,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:19:16,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-28 03:19:16,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:16,099 INFO L225 Difference]: With dead ends: 475 [2024-11-28 03:19:16,100 INFO L226 Difference]: Without dead ends: 467 [2024-11-28 03:19:16,100 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=4, Unknown=1, NotChecked=2, Total=12 [2024-11-28 03:19:16,101 INFO L435 NwaCegarLoop]: 116 mSDtfsCounter, 2 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:16,101 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 196 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 136 Unchecked, 0.2s Time] [2024-11-28 03:19:16,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2024-11-28 03:19:16,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 462. [2024-11-28 03:19:16,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 430 states have (on average 1.4325581395348836) internal successors, (616), 461 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:16,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 616 transitions. [2024-11-28 03:19:16,113 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 616 transitions. Word has length 29 [2024-11-28 03:19:16,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:16,113 INFO L471 AbstractCegarLoop]: Abstraction has 462 states and 616 transitions. [2024-11-28 03:19:16,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:16,113 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 616 transitions. [2024-11-28 03:19:16,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 03:19:16,114 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:16,114 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:16,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-28 03:19:16,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:16,319 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:19:16,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:16,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1308216350, now seen corresponding path program 1 times [2024-11-28 03:19:16,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:19:16,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876507218] [2024-11-28 03:19:16,319 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:16,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:16,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:16,324 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:16,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 03:19:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:16,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 03:19:16,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:16,496 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 7 [2024-11-28 03:19:16,557 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-28 03:19:16,557 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 27 [2024-11-28 03:19:16,705 INFO L349 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2024-11-28 03:19:16,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2024-11-28 03:19:16,853 INFO L349 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2024-11-28 03:19:16,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2024-11-28 03:19:16,958 INFO L349 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2024-11-28 03:19:16,959 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 2 case distinctions, treesize of input 21 treesize of output 32 [2024-11-28 03:19:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 03:19:17,149 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:19:17,149 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:19:17,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876507218] [2024-11-28 03:19:17,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876507218] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:17,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:17,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:19:17,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093723489] [2024-11-28 03:19:17,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:17,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:19:17,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:19:17,150 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:19:17,150 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:19:17,150 INFO L87 Difference]: Start difference. First operand 462 states and 616 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:17,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:17,485 INFO L93 Difference]: Finished difference Result 492 states and 635 transitions. [2024-11-28 03:19:17,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:19:17,486 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-28 03:19:17,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:17,487 INFO L225 Difference]: With dead ends: 492 [2024-11-28 03:19:17,488 INFO L226 Difference]: Without dead ends: 492 [2024-11-28 03:19:17,488 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:19:17,488 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 122 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:17,489 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 164 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:19:17,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2024-11-28 03:19:17,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 460. [2024-11-28 03:19:17,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 430 states have (on average 1.3976744186046512) internal successors, (601), 459 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:17,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 601 transitions. [2024-11-28 03:19:17,500 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 601 transitions. Word has length 35 [2024-11-28 03:19:17,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:17,501 INFO L471 AbstractCegarLoop]: Abstraction has 460 states and 601 transitions. [2024-11-28 03:19:17,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:17,501 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 601 transitions. [2024-11-28 03:19:17,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 03:19:17,501 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:17,501 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:17,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 03:19:17,702 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:17,702 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:19:17,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:17,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1308216349, now seen corresponding path program 1 times [2024-11-28 03:19:17,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:19:17,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [411590628] [2024-11-28 03:19:17,703 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:17,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:17,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:17,706 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:17,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 03:19:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:17,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 03:19:17,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:17,888 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 7 [2024-11-28 03:19:17,896 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 [2024-11-28 03:19:18,007 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-28 03:19:18,007 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 27 [2024-11-28 03:19:18,024 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 [2024-11-28 03:19:18,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:19:18,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-28 03:19:18,209 INFO L349 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2024-11-28 03:19:18,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2024-11-28 03:19:18,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:19:18,494 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 14 treesize of output 9 [2024-11-28 03:19:18,548 INFO L349 Elim1Store]: treesize reduction 18, result has 41.9 percent of original size [2024-11-28 03:19:18,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 31 [2024-11-28 03:19:18,644 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2024-11-28 03:19:18,645 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 1 case distinctions, treesize of input 12 treesize of output 18 [2024-11-28 03:19:19,064 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:19,064 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:19:49,028 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:49,028 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:19:49,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411590628] [2024-11-28 03:19:49,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411590628] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:19:49,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:19:49,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2024-11-28 03:19:49,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695435918] [2024-11-28 03:19:49,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:19:49,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:19:49,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:19:49,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:19:49,031 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=128, Unknown=5, NotChecked=0, Total=182 [2024-11-28 03:19:49,031 INFO L87 Difference]: Start difference. First operand 460 states and 601 transitions. Second operand has 14 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:51,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:51,229 INFO L93 Difference]: Finished difference Result 481 states and 609 transitions. [2024-11-28 03:19:51,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:19:51,231 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-28 03:19:51,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:51,232 INFO L225 Difference]: With dead ends: 481 [2024-11-28 03:19:51,232 INFO L226 Difference]: Without dead ends: 481 [2024-11-28 03:19:51,233 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=97, Invalid=204, Unknown=5, NotChecked=0, Total=306 [2024-11-28 03:19:51,233 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 236 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:51,233 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 362 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-28 03:19:51,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2024-11-28 03:19:51,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 456. [2024-11-28 03:19:51,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 430 states have (on average 1.3534883720930233) internal successors, (582), 455 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:51,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 582 transitions. [2024-11-28 03:19:51,244 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 582 transitions. Word has length 35 [2024-11-28 03:19:51,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:51,244 INFO L471 AbstractCegarLoop]: Abstraction has 456 states and 582 transitions. [2024-11-28 03:19:51,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:51,244 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 582 transitions. [2024-11-28 03:19:51,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-28 03:19:51,245 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:51,245 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:51,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 03:19:51,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:51,450 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:19:51,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:51,450 INFO L85 PathProgramCache]: Analyzing trace with hash -539983238, now seen corresponding path program 1 times [2024-11-28 03:19:51,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:19:51,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [527160390] [2024-11-28 03:19:51,450 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:51,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:51,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:51,452 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:51,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 03:19:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:51,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 03:19:51,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 03:19:52,124 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:19:52,125 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:19:52,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527160390] [2024-11-28 03:19:52,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527160390] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:52,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:52,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:19:52,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346381853] [2024-11-28 03:19:52,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:52,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:19:52,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:19:52,126 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:19:52,126 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:19:52,126 INFO L87 Difference]: Start difference. First operand 456 states and 582 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:52,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:52,523 INFO L93 Difference]: Finished difference Result 398 states and 472 transitions. [2024-11-28 03:19:52,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:19:52,524 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-11-28 03:19:52,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:52,525 INFO L225 Difference]: With dead ends: 398 [2024-11-28 03:19:52,525 INFO L226 Difference]: Without dead ends: 398 [2024-11-28 03:19:52,525 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:19:52,526 INFO L435 NwaCegarLoop]: 109 mSDtfsCounter, 26 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:52,526 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 528 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:19:52,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2024-11-28 03:19:52,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 393. [2024-11-28 03:19:52,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 367 states have (on average 1.2724795640326976) internal successors, (467), 392 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:52,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 467 transitions. [2024-11-28 03:19:52,535 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 467 transitions. Word has length 38 [2024-11-28 03:19:52,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:52,536 INFO L471 AbstractCegarLoop]: Abstraction has 393 states and 467 transitions. [2024-11-28 03:19:52,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:52,536 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 467 transitions. [2024-11-28 03:19:52,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 03:19:52,537 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:52,537 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:52,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 03:19:52,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:52,738 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:19:52,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:52,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1995280228, now seen corresponding path program 1 times [2024-11-28 03:19:52,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:19:52,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193422478] [2024-11-28 03:19:52,739 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:52,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:52,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:52,741 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:52,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 03:19:52,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:52,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:19:52,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:53,210 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 [2024-11-28 03:19:53,274 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 19 treesize of output 11 [2024-11-28 03:19:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 03:19:53,362 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:19:53,362 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:19:53,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193422478] [2024-11-28 03:19:53,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193422478] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:53,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:53,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:19:53,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434768398] [2024-11-28 03:19:53,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:53,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:19:53,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:19:53,363 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:19:53,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:19:53,363 INFO L87 Difference]: Start difference. First operand 393 states and 467 transitions. Second operand has 7 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:54,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:54,399 INFO L93 Difference]: Finished difference Result 406 states and 482 transitions. [2024-11-28 03:19:54,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:19:54,400 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-11-28 03:19:54,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:54,401 INFO L225 Difference]: With dead ends: 406 [2024-11-28 03:19:54,401 INFO L226 Difference]: Without dead ends: 406 [2024-11-28 03:19:54,401 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:19:54,402 INFO L435 NwaCegarLoop]: 113 mSDtfsCounter, 124 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:54,402 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 409 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 03:19:54,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2024-11-28 03:19:54,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 394. [2024-11-28 03:19:54,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 369 states have (on average 1.2737127371273713) internal successors, (470), 393 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:54,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 470 transitions. [2024-11-28 03:19:54,412 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 470 transitions. Word has length 52 [2024-11-28 03:19:54,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:54,412 INFO L471 AbstractCegarLoop]: Abstraction has 394 states and 470 transitions. [2024-11-28 03:19:54,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:54,412 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 470 transitions. [2024-11-28 03:19:54,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 03:19:54,413 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:54,414 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:54,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 03:19:54,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:54,614 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:19:54,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:54,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1995280229, now seen corresponding path program 1 times [2024-11-28 03:19:54,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:19:54,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582586783] [2024-11-28 03:19:54,615 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:54,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:54,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:54,617 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:54,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 03:19:54,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:54,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 03:19:54,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:55,026 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:55,026 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:19:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:55,802 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:19:55,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582586783] [2024-11-28 03:19:55,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582586783] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:19:55,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:19:55,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2024-11-28 03:19:55,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943127850] [2024-11-28 03:19:55,803 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:19:55,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 03:19:55,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:19:55,804 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 03:19:55,804 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:19:55,804 INFO L87 Difference]: Start difference. First operand 394 states and 470 transitions. Second operand has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:58,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:58,711 INFO L93 Difference]: Finished difference Result 841 states and 951 transitions. [2024-11-28 03:19:58,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-28 03:19:58,713 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-11-28 03:19:58,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:58,716 INFO L225 Difference]: With dead ends: 841 [2024-11-28 03:19:58,716 INFO L226 Difference]: Without dead ends: 841 [2024-11-28 03:19:58,717 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=370, Invalid=1352, Unknown=0, NotChecked=0, Total=1722 [2024-11-28 03:19:58,719 INFO L435 NwaCegarLoop]: 249 mSDtfsCounter, 1027 mSDsluCounter, 1984 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1027 SdHoareTripleChecker+Valid, 2233 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:58,719 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1027 Valid, 2233 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 03:19:58,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2024-11-28 03:19:58,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 590. [2024-11-28 03:19:58,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 565 states have (on average 1.2601769911504426) internal successors, (712), 589 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:58,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 712 transitions. [2024-11-28 03:19:58,737 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 712 transitions. Word has length 52 [2024-11-28 03:19:58,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:58,737 INFO L471 AbstractCegarLoop]: Abstraction has 590 states and 712 transitions. [2024-11-28 03:19:58,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:58,738 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 712 transitions. [2024-11-28 03:19:58,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-28 03:19:58,739 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:58,739 INFO L218 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:58,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 03:19:58,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:58,940 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:19:58,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:58,941 INFO L85 PathProgramCache]: Analyzing trace with hash -777708038, now seen corresponding path program 2 times [2024-11-28 03:19:58,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:19:58,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843468256] [2024-11-28 03:19:58,942 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:19:58,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:58,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:58,944 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:58,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 03:19:59,093 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:19:59,093 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:59,097 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 03:19:59,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:59,318 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 03:19:59,318 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:20:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 03:20:00,014 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:20:00,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843468256] [2024-11-28 03:20:00,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843468256] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:20:00,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:20:00,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2024-11-28 03:20:00,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697638826] [2024-11-28 03:20:00,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:20:00,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 03:20:00,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:20:00,016 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 03:20:00,016 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:20:00,016 INFO L87 Difference]: Start difference. First operand 590 states and 712 transitions. Second operand has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:02,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:20:02,353 INFO L93 Difference]: Finished difference Result 761 states and 867 transitions. [2024-11-28 03:20:02,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-28 03:20:02,353 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-11-28 03:20:02,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:20:02,355 INFO L225 Difference]: With dead ends: 761 [2024-11-28 03:20:02,356 INFO L226 Difference]: Without dead ends: 761 [2024-11-28 03:20:02,356 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=332, Invalid=1390, Unknown=0, NotChecked=0, Total=1722 [2024-11-28 03:20:02,357 INFO L435 NwaCegarLoop]: 218 mSDtfsCounter, 604 mSDsluCounter, 1924 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 2142 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:20:02,357 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 2142 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 03:20:02,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2024-11-28 03:20:02,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 640. [2024-11-28 03:20:02,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 615 states have (on average 1.2422764227642276) internal successors, (764), 639 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:02,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 764 transitions. [2024-11-28 03:20:02,378 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 764 transitions. Word has length 57 [2024-11-28 03:20:02,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:20:02,378 INFO L471 AbstractCegarLoop]: Abstraction has 640 states and 764 transitions. [2024-11-28 03:20:02,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:02,379 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 764 transitions. [2024-11-28 03:20:02,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-28 03:20:02,380 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:20:02,380 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:20:02,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-28 03:20:02,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:02,585 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:20:02,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:20:02,585 INFO L85 PathProgramCache]: Analyzing trace with hash 192290712, now seen corresponding path program 1 times [2024-11-28 03:20:02,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:20:02,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311337628] [2024-11-28 03:20:02,585 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:20:02,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:02,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:20:02,587 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:20:02,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 03:20:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:20:02,731 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 03:20:02,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:20:02,758 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 [2024-11-28 03:20:03,258 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 [2024-11-28 03:20:03,274 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 [2024-11-28 03:20:03,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-28 03:20:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-28 03:20:03,538 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:20:03,538 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:20:03,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311337628] [2024-11-28 03:20:03,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311337628] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:20:03,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:20:03,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 03:20:03,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584966161] [2024-11-28 03:20:03,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:20:03,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 03:20:03,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:20:03,540 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 03:20:03,540 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:20:03,540 INFO L87 Difference]: Start difference. First operand 640 states and 764 transitions. Second operand has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:04,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:20:04,916 INFO L93 Difference]: Finished difference Result 686 states and 822 transitions. [2024-11-28 03:20:04,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:20:04,917 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2024-11-28 03:20:04,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:20:04,919 INFO L225 Difference]: With dead ends: 686 [2024-11-28 03:20:04,919 INFO L226 Difference]: Without dead ends: 686 [2024-11-28 03:20:04,919 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-11-28 03:20:04,919 INFO L435 NwaCegarLoop]: 102 mSDtfsCounter, 137 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:20:04,920 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 574 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 03:20:04,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2024-11-28 03:20:04,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 671. [2024-11-28 03:20:04,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 646 states have (on average 1.2538699690402477) internal successors, (810), 670 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:04,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 810 transitions. [2024-11-28 03:20:04,935 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 810 transitions. Word has length 59 [2024-11-28 03:20:04,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:20:04,935 INFO L471 AbstractCegarLoop]: Abstraction has 671 states and 810 transitions. [2024-11-28 03:20:04,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:04,935 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 810 transitions. [2024-11-28 03:20:04,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-28 03:20:04,937 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:20:04,937 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:20:04,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 03:20:05,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:05,138 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:20:05,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:20:05,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1666094548, now seen corresponding path program 1 times [2024-11-28 03:20:05,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:20:05,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715749471] [2024-11-28 03:20:05,139 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:20:05,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:05,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:20:05,141 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:20:05,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 03:20:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:20:05,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 03:20:05,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:20:05,856 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-28 03:20:05,856 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:20:05,856 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:20:05,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715749471] [2024-11-28 03:20:05,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715749471] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:20:05,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:20:05,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:20:05,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678433936] [2024-11-28 03:20:05,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:20:05,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:20:05,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:20:05,857 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:20:05,857 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:20:05,857 INFO L87 Difference]: Start difference. First operand 671 states and 810 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:05,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:20:05,979 INFO L93 Difference]: Finished difference Result 744 states and 889 transitions. [2024-11-28 03:20:05,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:20:05,980 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2024-11-28 03:20:05,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:20:05,981 INFO L225 Difference]: With dead ends: 744 [2024-11-28 03:20:05,981 INFO L226 Difference]: Without dead ends: 744 [2024-11-28 03:20:05,982 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:20:05,982 INFO L435 NwaCegarLoop]: 113 mSDtfsCounter, 124 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:20:05,982 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 268 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:20:05,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2024-11-28 03:20:05,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 669. [2024-11-28 03:20:05,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 644 states have (on average 1.2515527950310559) internal successors, (806), 668 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:05,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 806 transitions. [2024-11-28 03:20:05,997 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 806 transitions. Word has length 60 [2024-11-28 03:20:05,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:20:05,998 INFO L471 AbstractCegarLoop]: Abstraction has 669 states and 806 transitions. [2024-11-28 03:20:05,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:05,998 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 806 transitions. [2024-11-28 03:20:05,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-28 03:20:05,999 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:20:05,999 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:20:06,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-28 03:20:06,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:06,204 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:20:06,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:20:06,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1669797607, now seen corresponding path program 1 times [2024-11-28 03:20:06,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:20:06,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1542650458] [2024-11-28 03:20:06,204 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:20:06,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:06,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:20:06,209 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:20:06,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 03:20:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:20:06,339 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 03:20:06,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:20:06,718 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 [2024-11-28 03:20:06,776 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 [2024-11-28 03:20:06,842 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-28 03:20:06,842 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:20:06,842 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:20:06,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542650458] [2024-11-28 03:20:06,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542650458] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:20:06,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:20:06,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 03:20:06,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785206073] [2024-11-28 03:20:06,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:20:06,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 03:20:06,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:20:06,844 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 03:20:06,844 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:20:06,844 INFO L87 Difference]: Start difference. First operand 669 states and 806 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:07,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:20:07,657 INFO L93 Difference]: Finished difference Result 682 states and 812 transitions. [2024-11-28 03:20:07,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:20:07,658 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2024-11-28 03:20:07,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:20:07,660 INFO L225 Difference]: With dead ends: 682 [2024-11-28 03:20:07,660 INFO L226 Difference]: Without dead ends: 682 [2024-11-28 03:20:07,660 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-11-28 03:20:07,660 INFO L435 NwaCegarLoop]: 117 mSDtfsCounter, 140 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:20:07,661 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 697 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 03:20:07,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2024-11-28 03:20:07,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 669. [2024-11-28 03:20:07,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 644 states have (on average 1.2453416149068324) internal successors, (802), 668 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:07,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 802 transitions. [2024-11-28 03:20:07,675 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 802 transitions. Word has length 60 [2024-11-28 03:20:07,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:20:07,675 INFO L471 AbstractCegarLoop]: Abstraction has 669 states and 802 transitions. [2024-11-28 03:20:07,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:07,675 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 802 transitions. [2024-11-28 03:20:07,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-28 03:20:07,677 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:20:07,677 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:20:07,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-28 03:20:07,877 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:07,877 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:20:07,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:20:07,878 INFO L85 PathProgramCache]: Analyzing trace with hash 500810590, now seen corresponding path program 1 times [2024-11-28 03:20:07,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:20:07,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1464046681] [2024-11-28 03:20:07,878 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:20:07,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:07,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:20:07,880 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:20:07,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 03:20:08,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:20:08,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 03:20:08,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:20:08,561 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:08,561 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:20:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 3 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:09,712 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:20:09,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464046681] [2024-11-28 03:20:09,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464046681] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:20:09,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:20:09,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2024-11-28 03:20:09,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700408214] [2024-11-28 03:20:09,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:20:09,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 03:20:09,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:20:09,714 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 03:20:09,714 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:20:09,714 INFO L87 Difference]: Start difference. First operand 669 states and 802 transitions. Second operand has 18 states, 18 states have (on average 6.388888888888889) internal successors, (115), 18 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:12,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:20:12,463 INFO L93 Difference]: Finished difference Result 798 states and 901 transitions. [2024-11-28 03:20:12,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 03:20:12,464 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.388888888888889) internal successors, (115), 18 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2024-11-28 03:20:12,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:20:12,465 INFO L225 Difference]: With dead ends: 798 [2024-11-28 03:20:12,465 INFO L226 Difference]: Without dead ends: 796 [2024-11-28 03:20:12,465 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2024-11-28 03:20:12,466 INFO L435 NwaCegarLoop]: 299 mSDtfsCounter, 1136 mSDsluCounter, 2079 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1136 SdHoareTripleChecker+Valid, 2378 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:20:12,466 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1136 Valid, 2378 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-28 03:20:12,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2024-11-28 03:20:12,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 397. [2024-11-28 03:20:12,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 372 states have (on average 1.25) internal successors, (465), 396 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:12,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 465 transitions. [2024-11-28 03:20:12,474 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 465 transitions. Word has length 63 [2024-11-28 03:20:12,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:20:12,474 INFO L471 AbstractCegarLoop]: Abstraction has 397 states and 465 transitions. [2024-11-28 03:20:12,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.388888888888889) internal successors, (115), 18 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:12,475 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 465 transitions. [2024-11-28 03:20:12,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-28 03:20:12,475 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:20:12,476 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:20:12,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-28 03:20:12,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:12,676 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:20:12,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:20:12,677 INFO L85 PathProgramCache]: Analyzing trace with hash 183475079, now seen corresponding path program 1 times [2024-11-28 03:20:12,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:20:12,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966071406] [2024-11-28 03:20:12,677 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:20:12,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:12,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:20:12,680 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:20:12,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 03:20:12,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:20:12,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-28 03:20:12,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:20:13,177 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 7 [2024-11-28 03:20:13,536 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 [2024-11-28 03:20:13,665 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 23 treesize of output 22 [2024-11-28 03:20:13,971 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:20:13,971 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2024-11-28 03:20:14,115 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 [2024-11-28 03:20:14,138 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 [2024-11-28 03:20:14,623 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 34 treesize of output 22 [2024-11-28 03:20:14,804 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:20:14,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2024-11-28 03:20:14,911 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 03:20:14,911 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:20:14,911 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:20:14,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966071406] [2024-11-28 03:20:14,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966071406] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:20:14,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:20:14,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2024-11-28 03:20:14,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303690419] [2024-11-28 03:20:14,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:20:14,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:20:14,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:20:14,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:20:14,913 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:20:14,913 INFO L87 Difference]: Start difference. First operand 397 states and 465 transitions. Second operand has 17 states, 16 states have (on average 3.125) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:17,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:20:17,805 INFO L93 Difference]: Finished difference Result 534 states and 639 transitions. [2024-11-28 03:20:17,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 03:20:17,805 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.125) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2024-11-28 03:20:17,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:20:17,807 INFO L225 Difference]: With dead ends: 534 [2024-11-28 03:20:17,807 INFO L226 Difference]: Without dead ends: 534 [2024-11-28 03:20:17,807 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2024-11-28 03:20:17,808 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 154 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:20:17,808 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 1018 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-28 03:20:17,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2024-11-28 03:20:17,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 454. [2024-11-28 03:20:17,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 429 states have (on average 1.2657342657342658) internal successors, (543), 453 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:17,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 543 transitions. [2024-11-28 03:20:17,816 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 543 transitions. Word has length 66 [2024-11-28 03:20:17,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:20:17,817 INFO L471 AbstractCegarLoop]: Abstraction has 454 states and 543 transitions. [2024-11-28 03:20:17,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.125) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:17,817 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 543 transitions. [2024-11-28 03:20:17,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-28 03:20:17,818 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:20:17,818 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:20:17,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-28 03:20:18,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:18,019 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:20:18,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:20:18,020 INFO L85 PathProgramCache]: Analyzing trace with hash 183475080, now seen corresponding path program 1 times [2024-11-28 03:20:18,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:20:18,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1160277891] [2024-11-28 03:20:18,020 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:20:18,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:18,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:20:18,024 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:20:18,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 03:20:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:20:18,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-28 03:20:18,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:20:18,749 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 [2024-11-28 03:20:19,246 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 [2024-11-28 03:20:19,268 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 [2024-11-28 03:20:19,404 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 23 treesize of output 11 [2024-11-28 03:20:19,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 03:20:19,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-28 03:20:19,832 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2024-11-28 03:20:20,130 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 [2024-11-28 03:20:20,150 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 [2024-11-28 03:20:21,126 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 54 treesize of output 34 [2024-11-28 03:20:21,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-11-28 03:20:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 03:20:21,575 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:20:21,575 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:20:21,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160277891] [2024-11-28 03:20:21,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160277891] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:20:21,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:20:21,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2024-11-28 03:20:21,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26017870] [2024-11-28 03:20:21,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:20:21,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 03:20:21,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:20:21,577 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 03:20:21,577 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:20:21,577 INFO L87 Difference]: Start difference. First operand 454 states and 543 transitions. Second operand has 18 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:24,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:20:24,869 INFO L93 Difference]: Finished difference Result 534 states and 637 transitions. [2024-11-28 03:20:24,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 03:20:24,870 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2024-11-28 03:20:24,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:20:24,871 INFO L225 Difference]: With dead ends: 534 [2024-11-28 03:20:24,871 INFO L226 Difference]: Without dead ends: 534 [2024-11-28 03:20:24,872 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2024-11-28 03:20:24,872 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 152 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:20:24,872 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 1062 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-28 03:20:24,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2024-11-28 03:20:24,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 454. [2024-11-28 03:20:24,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 429 states have (on average 1.2610722610722611) internal successors, (541), 453 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:24,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 541 transitions. [2024-11-28 03:20:24,880 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 541 transitions. Word has length 66 [2024-11-28 03:20:24,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:20:24,881 INFO L471 AbstractCegarLoop]: Abstraction has 454 states and 541 transitions. [2024-11-28 03:20:24,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:24,881 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 541 transitions. [2024-11-28 03:20:24,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-28 03:20:24,882 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:20:24,882 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:20:24,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-28 03:20:25,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:25,087 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-28 03:20:25,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:20:25,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1957026688, now seen corresponding path program 1 times [2024-11-28 03:20:25,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:20:25,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2108018504] [2024-11-28 03:20:25,087 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:20:25,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:25,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:20:25,089 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:20:25,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 03:20:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:20:25,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-28 03:20:25,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:20:25,329 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 7 [2024-11-28 03:20:25,531 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 03:20:25,531 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 21 treesize of output 20 [2024-11-28 03:20:25,720 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 03:20:25,720 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 21 treesize of output 20 [2024-11-28 03:20:26,164 INFO L349 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2024-11-28 03:20:26,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2024-11-28 03:20:26,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2024-11-28 03:20:27,186 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 71 treesize of output 35 [2024-11-28 03:20:27,233 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 [2024-11-28 03:20:27,514 INFO L349 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2024-11-28 03:20:27,514 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 75 treesize of output 48 [2024-11-28 03:20:27,525 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 71 treesize of output 51 [2024-11-28 03:20:28,179 INFO L349 Elim1Store]: treesize reduction 69, result has 13.8 percent of original size [2024-11-28 03:20:28,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 51 [2024-11-28 03:20:28,192 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 67 treesize of output 58 [2024-11-28 03:20:28,669 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 [2024-11-28 03:20:28,710 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 [2024-11-28 03:20:30,027 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 144 treesize of output 88 [2024-11-28 03:20:30,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 50 [2024-11-28 03:20:31,017 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-28 03:20:31,018 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 29 [2024-11-28 03:20:31,283 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 03:20:31,283 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:20:32,229 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 120 treesize of output 112 [2024-11-28 03:20:32,235 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 162 treesize of output 146 [2024-11-28 03:20:51,651 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-28 03:20:51,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101 [2024-11-28 03:20:51,652 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:20:51,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108018504] [2024-11-28 03:20:51,652 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-28 03:20:51,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-28 03:20:51,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:51,853 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:281) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:912) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:786) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:374) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:323) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:555) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:395) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:267) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:325) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:181) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:210) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:428) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:314) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:275) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:132) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 45 more [2024-11-28 03:20:51,862 INFO L158 Benchmark]: Toolchain (without parser) took 108039.92ms. Allocated memory was 83.9MB in the beginning and 167.8MB in the end (delta: 83.9MB). Free memory was 59.6MB in the beginning and 59.1MB in the end (delta: 450.4kB). Peak memory consumption was 84.4MB. Max. memory is 16.1GB. [2024-11-28 03:20:51,863 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 83.9MB. Free memory is still 64.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:20:51,863 INFO L158 Benchmark]: CACSL2BoogieTranslator took 576.86ms. Allocated memory is still 83.9MB. Free memory was 59.6MB in the beginning and 40.3MB in the end (delta: 19.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 03:20:51,863 INFO L158 Benchmark]: Boogie Procedure Inliner took 77.75ms. Allocated memory is still 83.9MB. Free memory was 40.3MB in the beginning and 38.1MB in the end (delta: 2.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 03:20:51,868 INFO L158 Benchmark]: Boogie Preprocessor took 119.34ms. Allocated memory is still 83.9MB. Free memory was 38.1MB in the beginning and 35.0MB in the end (delta: 3.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:20:51,868 INFO L158 Benchmark]: RCFGBuilder took 976.57ms. Allocated memory is still 83.9MB. Free memory was 35.0MB in the beginning and 40.7MB in the end (delta: -5.7MB). Peak memory consumption was 21.8MB. Max. memory is 16.1GB. [2024-11-28 03:20:51,869 INFO L158 Benchmark]: TraceAbstraction took 106281.43ms. Allocated memory was 83.9MB in the beginning and 167.8MB in the end (delta: 83.9MB). Free memory was 40.2MB in the beginning and 59.1MB in the end (delta: -18.9MB). Peak memory consumption was 62.6MB. Max. memory is 16.1GB. [2024-11-28 03:20:51,870 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 83.9MB. Free memory is still 64.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 576.86ms. Allocated memory is still 83.9MB. Free memory was 59.6MB in the beginning and 40.3MB in the end (delta: 19.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 77.75ms. Allocated memory is still 83.9MB. Free memory was 40.3MB in the beginning and 38.1MB in the end (delta: 2.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 119.34ms. Allocated memory is still 83.9MB. Free memory was 38.1MB in the beginning and 35.0MB in the end (delta: 3.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 976.57ms. Allocated memory is still 83.9MB. Free memory was 35.0MB in the beginning and 40.7MB in the end (delta: -5.7MB). Peak memory consumption was 21.8MB. Max. memory is 16.1GB. * TraceAbstraction took 106281.43ms. Allocated memory was 83.9MB in the beginning and 167.8MB in the end (delta: 83.9MB). Free memory was 40.2MB in the beginning and 59.1MB in the end (delta: -18.9MB). Peak memory consumption was 62.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a597ef87-88fe-406d-b592-0cd8fda4447c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory")