./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/busybox-1.22.0/dirname-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/busybox-1.22.0/dirname-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC --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 64bit --witnessprinter.graph.data.programhash deade1e5790a25ffe3efe3f50079c7cd07ab83afaa52029d4373e6401cf093c7 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 22:36:52,316 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 22:36:52,398 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2024-11-23 22:36:52,403 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 22:36:52,404 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 22:36:52,429 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 22:36:52,430 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 22:36:52,430 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 22:36:52,430 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 22:36:52,431 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 22:36:52,431 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 22:36:52,431 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 22:36:52,431 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 22:36:52,432 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 22:36:52,432 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 22:36:52,432 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 22:36:52,432 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 22:36:52,432 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 22:36:52,432 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-23 22:36:52,433 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-23 22:36:52,433 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-23 22:36:52,433 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 22:36:52,433 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-23 22:36:52,433 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-23 22:36:52,433 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 22:36:52,433 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 22:36:52,434 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 22:36:52,434 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 22:36:52,434 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 22:36:52,434 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 22:36:52,434 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 22:36:52,434 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 22:36:52,434 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 22:36:52,435 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 22:36:52,435 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 22:36:52,435 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 22:36:52,435 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 22:36:52,435 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 22:36:52,435 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 22:36:52,435 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 22:36:52,436 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 22:36:52,436 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 22:36:52,436 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 22:36:52,436 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 22:36:52,436 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_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> deade1e5790a25ffe3efe3f50079c7cd07ab83afaa52029d4373e6401cf093c7 [2024-11-23 22:36:52,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 22:36:52,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 22:36:52,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 22:36:52,760 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 22:36:52,760 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 22:36:52,762 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/busybox-1.22.0/dirname-1.i [2024-11-23 22:36:55,809 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/data/77a40538a/8ae3c2d468c04df386bd33c394f38afe/FLAG14c49ded6 [2024-11-23 22:36:56,274 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 22:36:56,274 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/sv-benchmarks/c/busybox-1.22.0/dirname-1.i [2024-11-23 22:36:56,298 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/data/77a40538a/8ae3c2d468c04df386bd33c394f38afe/FLAG14c49ded6 [2024-11-23 22:36:56,414 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/data/77a40538a/8ae3c2d468c04df386bd33c394f38afe [2024-11-23 22:36:56,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 22:36:56,419 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 22:36:56,420 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 22:36:56,421 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 22:36:56,426 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 22:36:56,427 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:36:56" (1/1) ... [2024-11-23 22:36:56,430 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@297d85d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:56, skipping insertion in model container [2024-11-23 22:36:56,431 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:36:56" (1/1) ... [2024-11-23 22:36:56,490 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 22:36:57,101 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 22:36:57,117 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 22:36:57,118 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 22:36:57,128 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 22:36:57,142 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 22:36:57,155 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 22:36:57,180 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 22:36:57,284 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 22:36:57,402 INFO L204 MainTranslator]: Completed translation [2024-11-23 22:36:57,403 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:57 WrapperNode [2024-11-23 22:36:57,404 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 22:36:57,406 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 22:36:57,407 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 22:36:57,407 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 22:36:57,416 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:57" (1/1) ... [2024-11-23 22:36:57,447 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:57" (1/1) ... [2024-11-23 22:36:57,505 INFO L138 Inliner]: procedures = 344, calls = 498, calls flagged for inlining = 8, calls inlined = 7, statements flattened = 658 [2024-11-23 22:36:57,508 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 22:36:57,509 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 22:36:57,509 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 22:36:57,509 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 22:36:57,521 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:57" (1/1) ... [2024-11-23 22:36:57,522 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:57" (1/1) ... [2024-11-23 22:36:57,540 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:57" (1/1) ... [2024-11-23 22:36:57,596 INFO L175 MemorySlicer]: Split 450 memory accesses to 15 slices as follows [2, 6, 3, 3, 3, 4, 4, 11, 4, 4, 3, 44, 355, 2, 2]. 79 percent of accesses are in the largest equivalence class. The 423 initializations are split as follows [2, 0, 3, 3, 3, 3, 3, 0, 3, 3, 3, 42, 355, 0, 0]. The 9 writes are split as follows [0, 2, 0, 0, 0, 0, 0, 2, 0, 0, 0, 2, 0, 1, 2]. [2024-11-23 22:36:57,596 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:57" (1/1) ... [2024-11-23 22:36:57,596 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:57" (1/1) ... [2024-11-23 22:36:57,628 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:57" (1/1) ... [2024-11-23 22:36:57,630 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:57" (1/1) ... [2024-11-23 22:36:57,635 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:57" (1/1) ... [2024-11-23 22:36:57,641 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:57" (1/1) ... [2024-11-23 22:36:57,644 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:57" (1/1) ... [2024-11-23 22:36:57,655 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 22:36:57,656 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 22:36:57,657 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 22:36:57,657 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 22:36:57,658 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:57" (1/1) ... [2024-11-23 22:36:57,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 22:36:57,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:36:57,698 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 22:36:57,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 22:36:57,728 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-23 22:36:57,728 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-23 22:36:57,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-23 22:36:57,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-23 22:36:57,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-23 22:36:57,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-23 22:36:57,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2024-11-23 22:36:57,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2024-11-23 22:36:57,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2024-11-23 22:36:57,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#7 [2024-11-23 22:36:57,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#8 [2024-11-23 22:36:57,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#9 [2024-11-23 22:36:57,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#10 [2024-11-23 22:36:57,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#11 [2024-11-23 22:36:57,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#12 [2024-11-23 22:36:57,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#13 [2024-11-23 22:36:57,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#14 [2024-11-23 22:36:57,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-23 22:36:57,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 22:36:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 22:36:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-23 22:36:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-23 22:36:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-23 22:36:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-23 22:36:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-11-23 22:36:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-11-23 22:36:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2024-11-23 22:36:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#9 [2024-11-23 22:36:57,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#10 [2024-11-23 22:36:57,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#11 [2024-11-23 22:36:57,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#12 [2024-11-23 22:36:57,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#13 [2024-11-23 22:36:57,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#14 [2024-11-23 22:36:57,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 22:36:57,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 22:36:57,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-23 22:36:57,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-23 22:36:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-23 22:36:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-23 22:36:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-11-23 22:36:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-11-23 22:36:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2024-11-23 22:36:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#9 [2024-11-23 22:36:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#10 [2024-11-23 22:36:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#11 [2024-11-23 22:36:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#12 [2024-11-23 22:36:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#13 [2024-11-23 22:36:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#14 [2024-11-23 22:36:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 22:36:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 22:36:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-23 22:36:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-23 22:36:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-23 22:36:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-23 22:36:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2024-11-23 22:36:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2024-11-23 22:36:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2024-11-23 22:36:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#7 [2024-11-23 22:36:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#8 [2024-11-23 22:36:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#9 [2024-11-23 22:36:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#10 [2024-11-23 22:36:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#11 [2024-11-23 22:36:57,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#12 [2024-11-23 22:36:57,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#13 [2024-11-23 22:36:57,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#14 [2024-11-23 22:36:57,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 22:36:57,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 22:36:57,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-23 22:36:57,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-23 22:36:57,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-23 22:36:57,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-23 22:36:57,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-11-23 22:36:57,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-11-23 22:36:57,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-11-23 22:36:57,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2024-11-23 22:36:57,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2024-11-23 22:36:57,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2024-11-23 22:36:57,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2024-11-23 22:36:57,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#13 [2024-11-23 22:36:57,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#14 [2024-11-23 22:36:57,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 22:36:57,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 22:36:58,067 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 22:36:58,069 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 22:36:59,377 INFO L? ?]: Removed 168 outVars from TransFormulas that were not future-live. [2024-11-23 22:36:59,377 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 22:36:59,406 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 22:36:59,408 INFO L312 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-23 22:36:59,409 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:36:59 BoogieIcfgContainer [2024-11-23 22:36:59,409 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 22:36:59,412 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 22:36:59,412 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 22:36:59,417 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 22:36:59,418 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:36:56" (1/3) ... [2024-11-23 22:36:59,419 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23dba26f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:36:59, skipping insertion in model container [2024-11-23 22:36:59,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:57" (2/3) ... [2024-11-23 22:36:59,421 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23dba26f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:36:59, skipping insertion in model container [2024-11-23 22:36:59,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:36:59" (3/3) ... [2024-11-23 22:36:59,422 INFO L128 eAbstractionObserver]: Analyzing ICFG dirname-1.i [2024-11-23 22:36:59,443 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 22:36:59,445 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG dirname-1.i that has 2 procedures, 183 locations, 1 initial locations, 6 loop locations, and 74 error locations. [2024-11-23 22:36:59,517 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 22:36:59,535 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;@36234d4f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 22:36:59,535 INFO L334 AbstractCegarLoop]: Starting to check reachability of 74 error locations. [2024-11-23 22:36:59,544 INFO L276 IsEmpty]: Start isEmpty. Operand has 183 states, 106 states have (on average 1.9339622641509433) internal successors, (205), 180 states have internal predecessors, (205), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:36:59,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-23 22:36:59,550 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:36:59,551 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-23 22:36:59,551 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:36:59,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:36:59,560 INFO L85 PathProgramCache]: Analyzing trace with hash 37801, now seen corresponding path program 1 times [2024-11-23 22:36:59,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:36:59,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026525446] [2024-11-23 22:36:59,570 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:36:59,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:36:59,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:37:00,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:37:00,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026525446] [2024-11-23 22:37:00,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026525446] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:37:00,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:37:00,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 22:37:00,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423903165] [2024-11-23 22:37:00,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:37:00,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 22:37:00,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:37:00,455 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 22:37:00,456 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 22:37:00,458 INFO L87 Difference]: Start difference. First operand has 183 states, 106 states have (on average 1.9339622641509433) internal successors, (205), 180 states have internal predecessors, (205), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:37:00,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:37:00,718 INFO L93 Difference]: Finished difference Result 142 states and 156 transitions. [2024-11-23 22:37:00,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 22:37:00,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-23 22:37:00,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:37:00,734 INFO L225 Difference]: With dead ends: 142 [2024-11-23 22:37:00,734 INFO L226 Difference]: Without dead ends: 142 [2024-11-23 22:37:00,737 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 [2024-11-23 22:37:00,742 INFO L435 NwaCegarLoop]: 97 mSDtfsCounter, 145 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-23 22:37:00,744 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 100 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 22:37:00,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-23 22:37:00,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2024-11-23 22:37:00,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 85 states have (on average 1.811764705882353) internal successors, (154), 139 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:00,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 156 transitions. [2024-11-23 22:37:00,810 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 156 transitions. Word has length 3 [2024-11-23 22:37:00,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:37:00,810 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 156 transitions. [2024-11-23 22:37:00,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:37:00,811 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 156 transitions. [2024-11-23 22:37:00,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-23 22:37:00,811 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:37:00,811 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-23 22:37:00,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 22:37:00,811 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:37:00,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:37:00,812 INFO L85 PathProgramCache]: Analyzing trace with hash 37802, now seen corresponding path program 1 times [2024-11-23 22:37:00,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:37:00,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915994009] [2024-11-23 22:37:00,812 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:00,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:37:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:01,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:37:01,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:37:01,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915994009] [2024-11-23 22:37:01,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915994009] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:37:01,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:37:01,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 22:37:01,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626580047] [2024-11-23 22:37:01,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:37:01,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 22:37:01,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:37:01,315 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 22:37:01,315 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 22:37:01,315 INFO L87 Difference]: Start difference. First operand 142 states and 156 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:37:01,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:37:01,576 INFO L93 Difference]: Finished difference Result 141 states and 155 transitions. [2024-11-23 22:37:01,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 22:37:01,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-23 22:37:01,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:37:01,578 INFO L225 Difference]: With dead ends: 141 [2024-11-23 22:37:01,578 INFO L226 Difference]: Without dead ends: 141 [2024-11-23 22:37:01,579 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 [2024-11-23 22:37:01,580 INFO L435 NwaCegarLoop]: 150 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-23 22:37:01,580 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 238 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 22:37:01,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-11-23 22:37:01,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2024-11-23 22:37:01,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 85 states have (on average 1.8) internal successors, (153), 138 states have internal predecessors, (153), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:01,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 155 transitions. [2024-11-23 22:37:01,601 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 155 transitions. Word has length 3 [2024-11-23 22:37:01,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:37:01,604 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 155 transitions. [2024-11-23 22:37:01,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:37:01,605 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 155 transitions. [2024-11-23 22:37:01,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-23 22:37:01,605 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:37:01,605 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:37:01,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-23 22:37:01,607 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:37:01,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:37:01,608 INFO L85 PathProgramCache]: Analyzing trace with hash 549792497, now seen corresponding path program 1 times [2024-11-23 22:37:01,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:37:01,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534827306] [2024-11-23 22:37:01,609 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:01,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:37:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:02,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:37:02,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:37:02,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534827306] [2024-11-23 22:37:02,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534827306] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:37:02,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:37:02,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 22:37:02,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950250457] [2024-11-23 22:37:02,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:37:02,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 22:37:02,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:37:02,164 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 22:37:02,164 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 22:37:02,164 INFO L87 Difference]: Start difference. First operand 141 states and 155 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:37:02,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:37:02,364 INFO L93 Difference]: Finished difference Result 145 states and 159 transitions. [2024-11-23 22:37:02,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 22:37:02,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-23 22:37:02,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:37:02,366 INFO L225 Difference]: With dead ends: 145 [2024-11-23 22:37:02,366 INFO L226 Difference]: Without dead ends: 145 [2024-11-23 22:37:02,369 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 22:37:02,370 INFO L435 NwaCegarLoop]: 148 mSDtfsCounter, 9 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-23 22:37:02,370 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 237 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 22:37:02,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-23 22:37:02,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2024-11-23 22:37:02,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 88 states have (on average 1.7727272727272727) internal successors, (156), 141 states have internal predecessors, (156), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:02,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 158 transitions. [2024-11-23 22:37:02,385 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 158 transitions. Word has length 7 [2024-11-23 22:37:02,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:37:02,385 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 158 transitions. [2024-11-23 22:37:02,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:37:02,385 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 158 transitions. [2024-11-23 22:37:02,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-23 22:37:02,386 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:37:02,386 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:37:02,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-23 22:37:02,386 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:37:02,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:37:02,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1823136790, now seen corresponding path program 1 times [2024-11-23 22:37:02,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:37:02,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611424546] [2024-11-23 22:37:02,387 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:02,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:37:02,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:37:02,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:37:02,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611424546] [2024-11-23 22:37:02,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611424546] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:37:02,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380215584] [2024-11-23 22:37:02,840 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:02,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:37:02,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:37:02,844 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:37:02,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 22:37:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:03,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 22:37:03,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:37:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:37:03,420 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:37:03,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-23 22:37:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:37:03,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380215584] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:37:03,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:37:03,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-11-23 22:37:03,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341203754] [2024-11-23 22:37:03,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:37:03,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-23 22:37:03,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:37:03,621 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-23 22:37:03,621 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2024-11-23 22:37:03,621 INFO L87 Difference]: Start difference. First operand 144 states and 158 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:37:04,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:37:04,090 INFO L93 Difference]: Finished difference Result 149 states and 163 transitions. [2024-11-23 22:37:04,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 22:37:04,091 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-23 22:37:04,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:37:04,092 INFO L225 Difference]: With dead ends: 149 [2024-11-23 22:37:04,092 INFO L226 Difference]: Without dead ends: 149 [2024-11-23 22:37:04,092 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2024-11-23 22:37:04,093 INFO L435 NwaCegarLoop]: 148 mSDtfsCounter, 150 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-23 22:37:04,093 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 599 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-23 22:37:04,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-11-23 22:37:04,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2024-11-23 22:37:04,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 94 states have (on average 1.7127659574468086) internal successors, (161), 146 states have internal predecessors, (161), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:04,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 163 transitions. [2024-11-23 22:37:04,115 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 163 transitions. Word has length 11 [2024-11-23 22:37:04,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:37:04,115 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 163 transitions. [2024-11-23 22:37:04,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:37:04,115 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 163 transitions. [2024-11-23 22:37:04,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-23 22:37:04,116 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:37:04,116 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:37:04,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-23 22:37:04,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-23 22:37:04,317 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:37:04,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:37:04,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1780159978, now seen corresponding path program 1 times [2024-11-23 22:37:04,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:37:04,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896471740] [2024-11-23 22:37:04,318 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:04,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:37:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:37:04,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:37:04,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896471740] [2024-11-23 22:37:04,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896471740] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:37:04,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643542269] [2024-11-23 22:37:04,738 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:04,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:37:04,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:37:04,740 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:37:04,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 22:37:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:05,123 INFO L256 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-23 22:37:05,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:37:05,183 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:37:05,183 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:37:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:37:05,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643542269] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:37:05,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:37:05,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-23 22:37:05,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3055950] [2024-11-23 22:37:05,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:37:05,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 22:37:05,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:37:05,282 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 22:37:05,282 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2024-11-23 22:37:05,282 INFO L87 Difference]: Start difference. First operand 149 states and 163 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-23 22:37:05,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:37:05,352 INFO L93 Difference]: Finished difference Result 169 states and 183 transitions. [2024-11-23 22:37:05,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 22:37:05,353 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2024-11-23 22:37:05,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:37:05,354 INFO L225 Difference]: With dead ends: 169 [2024-11-23 22:37:05,354 INFO L226 Difference]: Without dead ends: 169 [2024-11-23 22:37:05,354 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2024-11-23 22:37:05,355 INFO L435 NwaCegarLoop]: 151 mSDtfsCounter, 6 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 22:37:05,355 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 305 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 22:37:05,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-23 22:37:05,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2024-11-23 22:37:05,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 114 states have (on average 1.587719298245614) internal successors, (181), 166 states have internal predecessors, (181), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:05,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 183 transitions. [2024-11-23 22:37:05,369 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 183 transitions. Word has length 25 [2024-11-23 22:37:05,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:37:05,369 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 183 transitions. [2024-11-23 22:37:05,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-23 22:37:05,369 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 183 transitions. [2024-11-23 22:37:05,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-23 22:37:05,370 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:37:05,370 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:37:05,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-23 22:37:05,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:37:05,575 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:37:05,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:37:05,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1311014067, now seen corresponding path program 2 times [2024-11-23 22:37:05,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:37:05,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103774753] [2024-11-23 22:37:05,576 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:37:05,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:37:05,630 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 22:37:05,630 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:37:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-23 22:37:05,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:37:05,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103774753] [2024-11-23 22:37:05,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103774753] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:37:05,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:37:05,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 22:37:05,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853642935] [2024-11-23 22:37:05,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:37:05,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 22:37:05,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:37:05,835 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 22:37:05,835 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 22:37:05,836 INFO L87 Difference]: Start difference. First operand 169 states and 183 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:05,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:37:05,985 INFO L93 Difference]: Finished difference Result 164 states and 178 transitions. [2024-11-23 22:37:05,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 22:37:05,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2024-11-23 22:37:05,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:37:05,986 INFO L225 Difference]: With dead ends: 164 [2024-11-23 22:37:05,987 INFO L226 Difference]: Without dead ends: 164 [2024-11-23 22:37:05,987 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 [2024-11-23 22:37:05,987 INFO L435 NwaCegarLoop]: 95 mSDtfsCounter, 127 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 22:37:05,988 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 106 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 22:37:05,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-11-23 22:37:06,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2024-11-23 22:37:06,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 114 states have (on average 1.543859649122807) internal successors, (176), 161 states have internal predecessors, (176), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:06,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 178 transitions. [2024-11-23 22:37:06,001 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 178 transitions. Word has length 45 [2024-11-23 22:37:06,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:37:06,005 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 178 transitions. [2024-11-23 22:37:06,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:06,005 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 178 transitions. [2024-11-23 22:37:06,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-23 22:37:06,006 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:37:06,006 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:37:06,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-23 22:37:06,006 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:37:06,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:37:06,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1311014068, now seen corresponding path program 1 times [2024-11-23 22:37:06,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:37:06,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149425640] [2024-11-23 22:37:06,007 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:06,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:37:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:37:06,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:37:06,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149425640] [2024-11-23 22:37:06,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149425640] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:37:06,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787238532] [2024-11-23 22:37:06,519 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:06,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:37:06,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:37:06,523 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:37:06,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 22:37:06,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:06,921 INFO L256 TraceCheckSpWp]: Trace formula consists of 1155 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-23 22:37:06,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:37:07,005 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:37:07,005 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:37:07,168 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:37:07,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787238532] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:37:07,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:37:07,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2024-11-23 22:37:07,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384470129] [2024-11-23 22:37:07,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:37:07,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 22:37:07,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:37:07,171 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 22:37:07,171 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-23 22:37:07,171 INFO L87 Difference]: Start difference. First operand 164 states and 178 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-23 22:37:07,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:37:07,245 INFO L93 Difference]: Finished difference Result 172 states and 186 transitions. [2024-11-23 22:37:07,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-23 22:37:07,246 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2024-11-23 22:37:07,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:37:07,247 INFO L225 Difference]: With dead ends: 172 [2024-11-23 22:37:07,247 INFO L226 Difference]: Without dead ends: 172 [2024-11-23 22:37:07,247 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-23 22:37:07,248 INFO L435 NwaCegarLoop]: 146 mSDtfsCounter, 3 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 22:37:07,249 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 437 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 22:37:07,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-11-23 22:37:07,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2024-11-23 22:37:07,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 122 states have (on average 1.5081967213114753) internal successors, (184), 169 states have internal predecessors, (184), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:07,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 186 transitions. [2024-11-23 22:37:07,261 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 186 transitions. Word has length 45 [2024-11-23 22:37:07,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:37:07,261 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 186 transitions. [2024-11-23 22:37:07,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-23 22:37:07,262 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 186 transitions. [2024-11-23 22:37:07,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-23 22:37:07,263 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:37:07,263 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:37:07,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-23 22:37:07,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:37:07,463 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:37:07,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:37:07,464 INFO L85 PathProgramCache]: Analyzing trace with hash -22436698, now seen corresponding path program 2 times [2024-11-23 22:37:07,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:37:07,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296135773] [2024-11-23 22:37:07,464 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:37:07,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:37:07,567 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 22:37:07,568 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:37:08,153 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 22:37:08,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:37:08,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296135773] [2024-11-23 22:37:08,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296135773] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:37:08,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:37:08,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 22:37:08,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724927529] [2024-11-23 22:37:08,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:37:08,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 22:37:08,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:37:08,157 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 22:37:08,157 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-23 22:37:08,157 INFO L87 Difference]: Start difference. First operand 172 states and 186 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:08,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:37:08,464 INFO L93 Difference]: Finished difference Result 264 states and 290 transitions. [2024-11-23 22:37:08,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 22:37:08,464 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2024-11-23 22:37:08,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:37:08,466 INFO L225 Difference]: With dead ends: 264 [2024-11-23 22:37:08,466 INFO L226 Difference]: Without dead ends: 264 [2024-11-23 22:37:08,466 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-23 22:37:08,467 INFO L435 NwaCegarLoop]: 104 mSDtfsCounter, 343 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-23 22:37:08,467 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 394 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-23 22:37:08,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-11-23 22:37:08,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 171. [2024-11-23 22:37:08,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 122 states have (on average 1.5) internal successors, (183), 168 states have internal predecessors, (183), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:08,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 185 transitions. [2024-11-23 22:37:08,480 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 185 transitions. Word has length 53 [2024-11-23 22:37:08,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:37:08,481 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 185 transitions. [2024-11-23 22:37:08,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:08,481 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 185 transitions. [2024-11-23 22:37:08,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-23 22:37:08,483 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:37:08,485 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:37:08,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-23 22:37:08,486 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:37:08,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:37:08,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1840208915, now seen corresponding path program 1 times [2024-11-23 22:37:08,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:37:08,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381080354] [2024-11-23 22:37:08,486 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:08,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:37:08,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 22:37:09,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:37:09,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381080354] [2024-11-23 22:37:09,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381080354] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:37:09,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:37:09,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 22:37:09,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893861579] [2024-11-23 22:37:09,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:37:09,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 22:37:09,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:37:09,148 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 22:37:09,148 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-23 22:37:09,148 INFO L87 Difference]: Start difference. First operand 171 states and 185 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:09,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:37:09,433 INFO L93 Difference]: Finished difference Result 192 states and 209 transitions. [2024-11-23 22:37:09,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 22:37:09,434 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2024-11-23 22:37:09,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:37:09,435 INFO L225 Difference]: With dead ends: 192 [2024-11-23 22:37:09,435 INFO L226 Difference]: Without dead ends: 192 [2024-11-23 22:37:09,435 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-23 22:37:09,436 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 314 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-23 22:37:09,436 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 187 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-23 22:37:09,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-23 22:37:09,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 186. [2024-11-23 22:37:09,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 137 states have (on average 1.5036496350364963) internal successors, (206), 183 states have internal predecessors, (206), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:09,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 208 transitions. [2024-11-23 22:37:09,441 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 208 transitions. Word has length 57 [2024-11-23 22:37:09,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:37:09,442 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 208 transitions. [2024-11-23 22:37:09,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:09,442 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 208 transitions. [2024-11-23 22:37:09,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-23 22:37:09,443 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:37:09,443 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:37:09,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-23 22:37:09,443 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:37:09,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:37:09,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1840205618, now seen corresponding path program 1 times [2024-11-23 22:37:09,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:37:09,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972077599] [2024-11-23 22:37:09,444 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:09,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:37:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 22:37:09,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:37:09,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972077599] [2024-11-23 22:37:09,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972077599] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:37:09,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:37:09,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 22:37:09,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252317809] [2024-11-23 22:37:09,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:37:09,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 22:37:09,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:37:09,761 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 22:37:09,762 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 22:37:09,762 INFO L87 Difference]: Start difference. First operand 186 states and 208 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:09,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:37:09,935 INFO L93 Difference]: Finished difference Result 180 states and 202 transitions. [2024-11-23 22:37:09,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 22:37:09,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2024-11-23 22:37:09,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:37:09,937 INFO L225 Difference]: With dead ends: 180 [2024-11-23 22:37:09,937 INFO L226 Difference]: Without dead ends: 180 [2024-11-23 22:37:09,937 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-23 22:37:09,938 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 189 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-23 22:37:09,938 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 135 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 22:37:09,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-11-23 22:37:09,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2024-11-23 22:37:09,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 137 states have (on average 1.4598540145985401) internal successors, (200), 177 states have internal predecessors, (200), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:09,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 202 transitions. [2024-11-23 22:37:09,946 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 202 transitions. Word has length 57 [2024-11-23 22:37:09,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:37:09,947 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 202 transitions. [2024-11-23 22:37:09,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:09,947 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 202 transitions. [2024-11-23 22:37:09,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-23 22:37:09,949 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:37:09,950 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:37:09,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-23 22:37:09,950 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:37:09,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:37:09,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1840205617, now seen corresponding path program 1 times [2024-11-23 22:37:09,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:37:09,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902527685] [2024-11-23 22:37:09,951 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:09,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:37:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 22:37:10,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:37:10,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902527685] [2024-11-23 22:37:10,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902527685] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:37:10,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:37:10,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 22:37:10,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216409871] [2024-11-23 22:37:10,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:37:10,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 22:37:10,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:37:10,349 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 22:37:10,349 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-23 22:37:10,350 INFO L87 Difference]: Start difference. First operand 180 states and 202 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:10,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:37:10,441 INFO L93 Difference]: Finished difference Result 186 states and 202 transitions. [2024-11-23 22:37:10,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 22:37:10,442 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2024-11-23 22:37:10,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:37:10,443 INFO L225 Difference]: With dead ends: 186 [2024-11-23 22:37:10,443 INFO L226 Difference]: Without dead ends: 186 [2024-11-23 22:37:10,443 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-23 22:37:10,444 INFO L435 NwaCegarLoop]: 128 mSDtfsCounter, 147 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 22:37:10,444 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 511 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 22:37:10,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-11-23 22:37:10,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 180. [2024-11-23 22:37:10,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 137 states have (on average 1.4525547445255473) internal successors, (199), 177 states have internal predecessors, (199), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:10,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 201 transitions. [2024-11-23 22:37:10,450 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 201 transitions. Word has length 57 [2024-11-23 22:37:10,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:37:10,450 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 201 transitions. [2024-11-23 22:37:10,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:10,450 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 201 transitions. [2024-11-23 22:37:10,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-23 22:37:10,451 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:37:10,451 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:37:10,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-23 22:37:10,452 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:37:10,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:37:10,452 INFO L85 PathProgramCache]: Analyzing trace with hash -701228531, now seen corresponding path program 1 times [2024-11-23 22:37:10,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:37:10,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974060236] [2024-11-23 22:37:10,453 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:10,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:37:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 22:37:10,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:37:10,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974060236] [2024-11-23 22:37:10,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974060236] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:37:10,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:37:10,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 22:37:10,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103157307] [2024-11-23 22:37:10,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:37:10,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 22:37:10,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:37:10,829 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 22:37:10,829 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 22:37:10,829 INFO L87 Difference]: Start difference. First operand 180 states and 201 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:10,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:37:10,949 INFO L93 Difference]: Finished difference Result 179 states and 199 transitions. [2024-11-23 22:37:10,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 22:37:10,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2024-11-23 22:37:10,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:37:10,951 INFO L225 Difference]: With dead ends: 179 [2024-11-23 22:37:10,951 INFO L226 Difference]: Without dead ends: 179 [2024-11-23 22:37:10,951 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 [2024-11-23 22:37:10,951 INFO L435 NwaCegarLoop]: 99 mSDtfsCounter, 117 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 22:37:10,952 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 110 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 22:37:10,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-11-23 22:37:10,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2024-11-23 22:37:10,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 137 states have (on average 1.437956204379562) internal successors, (197), 176 states have internal predecessors, (197), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:10,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 199 transitions. [2024-11-23 22:37:10,963 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 199 transitions. Word has length 60 [2024-11-23 22:37:10,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:37:10,963 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 199 transitions. [2024-11-23 22:37:10,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:10,964 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 199 transitions. [2024-11-23 22:37:10,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-23 22:37:10,964 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:37:10,964 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:37:10,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-23 22:37:10,965 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:37:10,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:37:10,965 INFO L85 PathProgramCache]: Analyzing trace with hash -701228530, now seen corresponding path program 1 times [2024-11-23 22:37:10,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:37:10,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366081004] [2024-11-23 22:37:10,965 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:10,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:37:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:11,878 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 22:37:11,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:37:11,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366081004] [2024-11-23 22:37:11,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366081004] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:37:11,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:37:11,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 22:37:11,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527677476] [2024-11-23 22:37:11,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:37:11,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 22:37:11,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:37:11,880 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 22:37:11,880 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-23 22:37:11,880 INFO L87 Difference]: Start difference. First operand 179 states and 199 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:12,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:37:12,305 INFO L93 Difference]: Finished difference Result 184 states and 199 transitions. [2024-11-23 22:37:12,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 22:37:12,306 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2024-11-23 22:37:12,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:37:12,307 INFO L225 Difference]: With dead ends: 184 [2024-11-23 22:37:12,307 INFO L226 Difference]: Without dead ends: 184 [2024-11-23 22:37:12,307 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-23 22:37:12,308 INFO L435 NwaCegarLoop]: 126 mSDtfsCounter, 34 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-23 22:37:12,308 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 329 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-23 22:37:12,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-11-23 22:37:12,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 179. [2024-11-23 22:37:12,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 137 states have (on average 1.4306569343065694) internal successors, (196), 176 states have internal predecessors, (196), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:12,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 198 transitions. [2024-11-23 22:37:12,321 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 198 transitions. Word has length 60 [2024-11-23 22:37:12,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:37:12,322 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 198 transitions. [2024-11-23 22:37:12,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:12,322 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 198 transitions. [2024-11-23 22:37:12,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-23 22:37:12,325 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:37:12,326 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:37:12,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-23 22:37:12,326 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:37:12,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:37:12,327 INFO L85 PathProgramCache]: Analyzing trace with hash 421789555, now seen corresponding path program 1 times [2024-11-23 22:37:12,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:37:12,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266549331] [2024-11-23 22:37:12,327 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:12,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:37:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:12,772 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 22:37:12,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:37:12,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266549331] [2024-11-23 22:37:12,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266549331] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:37:12,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:37:12,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 22:37:12,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412200812] [2024-11-23 22:37:12,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:37:12,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 22:37:12,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:37:12,773 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 22:37:12,773 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 22:37:12,774 INFO L87 Difference]: Start difference. First operand 179 states and 198 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:13,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:37:13,007 INFO L93 Difference]: Finished difference Result 178 states and 196 transitions. [2024-11-23 22:37:13,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 22:37:13,007 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2024-11-23 22:37:13,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:37:13,008 INFO L225 Difference]: With dead ends: 178 [2024-11-23 22:37:13,008 INFO L226 Difference]: Without dead ends: 178 [2024-11-23 22:37:13,009 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-23 22:37:13,009 INFO L435 NwaCegarLoop]: 126 mSDtfsCounter, 13 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-23 22:37:13,010 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 377 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 22:37:13,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-23 22:37:13,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2024-11-23 22:37:13,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 137 states have (on average 1.416058394160584) internal successors, (194), 175 states have internal predecessors, (194), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:13,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 196 transitions. [2024-11-23 22:37:13,022 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 196 transitions. Word has length 63 [2024-11-23 22:37:13,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:37:13,023 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 196 transitions. [2024-11-23 22:37:13,023 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:13,023 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 196 transitions. [2024-11-23 22:37:13,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-23 22:37:13,023 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:37:13,024 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:37:13,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-23 22:37:13,024 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:37:13,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:37:13,024 INFO L85 PathProgramCache]: Analyzing trace with hash 421789556, now seen corresponding path program 1 times [2024-11-23 22:37:13,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:37:13,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747512091] [2024-11-23 22:37:13,028 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:13,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:37:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 22:37:13,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:37:13,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747512091] [2024-11-23 22:37:13,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747512091] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:37:13,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:37:13,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 22:37:13,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947258788] [2024-11-23 22:37:13,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:37:13,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 22:37:13,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:37:13,857 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 22:37:13,857 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 22:37:13,857 INFO L87 Difference]: Start difference. First operand 178 states and 196 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:14,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:37:14,140 INFO L93 Difference]: Finished difference Result 177 states and 194 transitions. [2024-11-23 22:37:14,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 22:37:14,141 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2024-11-23 22:37:14,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:37:14,142 INFO L225 Difference]: With dead ends: 177 [2024-11-23 22:37:14,142 INFO L226 Difference]: Without dead ends: 177 [2024-11-23 22:37:14,143 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-23 22:37:14,143 INFO L435 NwaCegarLoop]: 125 mSDtfsCounter, 12 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-23 22:37:14,143 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 357 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-23 22:37:14,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-11-23 22:37:14,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2024-11-23 22:37:14,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 137 states have (on average 1.4014598540145986) internal successors, (192), 174 states have internal predecessors, (192), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:14,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 194 transitions. [2024-11-23 22:37:14,156 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 194 transitions. Word has length 63 [2024-11-23 22:37:14,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:37:14,156 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 194 transitions. [2024-11-23 22:37:14,157 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:14,157 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 194 transitions. [2024-11-23 22:37:14,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-23 22:37:14,157 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:37:14,157 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 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] [2024-11-23 22:37:14,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-23 22:37:14,158 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:37:14,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:37:14,158 INFO L85 PathProgramCache]: Analyzing trace with hash 248498422, now seen corresponding path program 1 times [2024-11-23 22:37:14,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:37:14,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129934176] [2024-11-23 22:37:14,162 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:14,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:37:14,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 22:37:14,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:37:14,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129934176] [2024-11-23 22:37:14,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129934176] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:37:14,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:37:14,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 22:37:14,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689638677] [2024-11-23 22:37:14,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:37:14,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 22:37:14,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:37:14,657 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 22:37:14,657 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 22:37:14,657 INFO L87 Difference]: Start difference. First operand 177 states and 194 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:14,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:37:14,888 INFO L93 Difference]: Finished difference Result 176 states and 192 transitions. [2024-11-23 22:37:14,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 22:37:14,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2024-11-23 22:37:14,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:37:14,890 INFO L225 Difference]: With dead ends: 176 [2024-11-23 22:37:14,890 INFO L226 Difference]: Without dead ends: 176 [2024-11-23 22:37:14,890 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-23 22:37:14,891 INFO L435 NwaCegarLoop]: 125 mSDtfsCounter, 7 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-23 22:37:14,891 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 374 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 22:37:14,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-11-23 22:37:14,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2024-11-23 22:37:14,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 137 states have (on average 1.3868613138686132) internal successors, (190), 173 states have internal predecessors, (190), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:14,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 192 transitions. [2024-11-23 22:37:14,906 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 192 transitions. Word has length 68 [2024-11-23 22:37:14,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:37:14,906 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 192 transitions. [2024-11-23 22:37:14,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:14,906 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 192 transitions. [2024-11-23 22:37:14,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-23 22:37:14,907 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:37:14,907 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 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] [2024-11-23 22:37:14,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-23 22:37:14,907 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:37:14,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:37:14,908 INFO L85 PathProgramCache]: Analyzing trace with hash 248498423, now seen corresponding path program 1 times [2024-11-23 22:37:14,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:37:14,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770409453] [2024-11-23 22:37:14,908 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:14,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:37:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 22:37:15,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:37:15,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770409453] [2024-11-23 22:37:15,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770409453] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:37:15,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:37:15,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 22:37:15,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352990200] [2024-11-23 22:37:15,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:37:15,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 22:37:15,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:37:15,728 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 22:37:15,728 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-23 22:37:15,728 INFO L87 Difference]: Start difference. First operand 176 states and 192 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:16,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:37:16,074 INFO L93 Difference]: Finished difference Result 186 states and 203 transitions. [2024-11-23 22:37:16,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 22:37:16,074 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2024-11-23 22:37:16,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:37:16,075 INFO L225 Difference]: With dead ends: 186 [2024-11-23 22:37:16,075 INFO L226 Difference]: Without dead ends: 186 [2024-11-23 22:37:16,076 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-23 22:37:16,076 INFO L435 NwaCegarLoop]: 122 mSDtfsCounter, 12 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-23 22:37:16,076 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 420 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-23 22:37:16,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-11-23 22:37:16,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2024-11-23 22:37:16,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 145 states have (on average 1.3724137931034484) internal successors, (199), 181 states have internal predecessors, (199), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:16,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 201 transitions. [2024-11-23 22:37:16,089 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 201 transitions. Word has length 68 [2024-11-23 22:37:16,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:37:16,089 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 201 transitions. [2024-11-23 22:37:16,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:16,089 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 201 transitions. [2024-11-23 22:37:16,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-23 22:37:16,090 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:37:16,090 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 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] [2024-11-23 22:37:16,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-23 22:37:16,090 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:37:16,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:37:16,091 INFO L85 PathProgramCache]: Analyzing trace with hash -896268059, now seen corresponding path program 1 times [2024-11-23 22:37:16,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:37:16,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89759349] [2024-11-23 22:37:16,091 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:16,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:37:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:16,899 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 22:37:16,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:37:16,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89759349] [2024-11-23 22:37:16,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89759349] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:37:16,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391263857] [2024-11-23 22:37:16,900 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:16,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:37:16,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:37:16,902 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:37:16,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 22:37:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:17,352 INFO L256 TraceCheckSpWp]: Trace formula consists of 1336 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-23 22:37:17,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:37:17,380 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 [2024-11-23 22:37:17,416 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 23 treesize of output 1 [2024-11-23 22:37:17,421 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 23 treesize of output 1 [2024-11-23 22:37:17,695 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 25 treesize of output 9 [2024-11-23 22:37:17,708 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 36 treesize of output 12 [2024-11-23 22:37:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 22:37:17,750 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:37:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 22:37:18,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391263857] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:37:18,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:37:18,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 20 [2024-11-23 22:37:18,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785608818] [2024-11-23 22:37:18,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:37:18,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-23 22:37:18,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:37:18,139 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-23 22:37:18,139 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2024-11-23 22:37:18,139 INFO L87 Difference]: Start difference. First operand 184 states and 201 transitions. Second operand has 21 states, 20 states have (on average 3.55) internal successors, (71), 21 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:19,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:37:19,150 INFO L93 Difference]: Finished difference Result 197 states and 214 transitions. [2024-11-23 22:37:19,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-23 22:37:19,150 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.55) internal successors, (71), 21 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2024-11-23 22:37:19,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:37:19,152 INFO L225 Difference]: With dead ends: 197 [2024-11-23 22:37:19,152 INFO L226 Difference]: Without dead ends: 197 [2024-11-23 22:37:19,153 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2024-11-23 22:37:19,154 INFO L435 NwaCegarLoop]: 122 mSDtfsCounter, 21 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-23 22:37:19,154 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1013 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-23 22:37:19,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-23 22:37:19,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2024-11-23 22:37:19,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 159 states have (on average 1.3333333333333333) internal successors, (212), 194 states have internal predecessors, (212), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:19,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 214 transitions. [2024-11-23 22:37:19,161 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 214 transitions. Word has length 73 [2024-11-23 22:37:19,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:37:19,162 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 214 transitions. [2024-11-23 22:37:19,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.55) internal successors, (71), 21 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:19,162 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 214 transitions. [2024-11-23 22:37:19,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-23 22:37:19,163 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:37:19,163 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 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] [2024-11-23 22:37:19,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-23 22:37:19,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:37:19,367 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:37:19,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:37:19,368 INFO L85 PathProgramCache]: Analyzing trace with hash 403173444, now seen corresponding path program 1 times [2024-11-23 22:37:19,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:37:19,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793401454] [2024-11-23 22:37:19,368 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:19,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:37:19,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 22:37:19,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:37:19,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793401454] [2024-11-23 22:37:19,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793401454] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:37:19,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467047254] [2024-11-23 22:37:19,703 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:19,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:37:19,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:37:19,705 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:37:19,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 22:37:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:20,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 1399 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-23 22:37:20,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:37:20,236 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 22:37:20,236 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:37:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 22:37:20,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467047254] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:37:20,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:37:20,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-23 22:37:20,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466222192] [2024-11-23 22:37:20,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:37:20,324 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 22:37:20,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:37:20,324 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 22:37:20,324 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2024-11-23 22:37:20,324 INFO L87 Difference]: Start difference. First operand 197 states and 214 transitions. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:20,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:37:20,388 INFO L93 Difference]: Finished difference Result 254 states and 269 transitions. [2024-11-23 22:37:20,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 22:37:20,389 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2024-11-23 22:37:20,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:37:20,390 INFO L225 Difference]: With dead ends: 254 [2024-11-23 22:37:20,390 INFO L226 Difference]: Without dead ends: 254 [2024-11-23 22:37:20,390 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2024-11-23 22:37:20,391 INFO L435 NwaCegarLoop]: 134 mSDtfsCounter, 32 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 22:37:20,391 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 409 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 22:37:20,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-11-23 22:37:20,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 247. [2024-11-23 22:37:20,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 209 states have (on average 1.277511961722488) internal successors, (267), 244 states have internal predecessors, (267), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:20,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 269 transitions. [2024-11-23 22:37:20,401 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 269 transitions. Word has length 84 [2024-11-23 22:37:20,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:37:20,402 INFO L471 AbstractCegarLoop]: Abstraction has 247 states and 269 transitions. [2024-11-23 22:37:20,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:20,402 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 269 transitions. [2024-11-23 22:37:20,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-23 22:37:20,403 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:37:20,403 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:37:20,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-23 22:37:20,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:37:20,605 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:37:20,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:37:20,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1480660302, now seen corresponding path program 2 times [2024-11-23 22:37:20,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:37:20,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231278539] [2024-11-23 22:37:20,606 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:37:20,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:37:20,780 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 22:37:20,784 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:37:21,171 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 3 proven. 148 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 22:37:21,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:37:21,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231278539] [2024-11-23 22:37:21,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231278539] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:37:21,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431441609] [2024-11-23 22:37:21,172 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:37:21,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:37:21,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:37:21,174 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:37:21,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-23 22:37:21,699 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 22:37:21,699 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:37:21,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 1544 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-23 22:37:21,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:37:21,816 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 3 proven. 148 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 22:37:21,816 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:37:21,989 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 3 proven. 148 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 22:37:21,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431441609] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:37:21,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:37:21,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2024-11-23 22:37:21,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222309868] [2024-11-23 22:37:21,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:37:21,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 22:37:21,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:37:21,991 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 22:37:21,991 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-23 22:37:21,991 INFO L87 Difference]: Start difference. First operand 247 states and 269 transitions. Second operand has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:22,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:37:22,071 INFO L93 Difference]: Finished difference Result 276 states and 291 transitions. [2024-11-23 22:37:22,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-23 22:37:22,072 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2024-11-23 22:37:22,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:37:22,073 INFO L225 Difference]: With dead ends: 276 [2024-11-23 22:37:22,073 INFO L226 Difference]: Without dead ends: 276 [2024-11-23 22:37:22,073 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 208 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-23 22:37:22,074 INFO L435 NwaCegarLoop]: 134 mSDtfsCounter, 27 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 22:37:22,074 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 545 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 22:37:22,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2024-11-23 22:37:22,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 267. [2024-11-23 22:37:22,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 229 states have (on average 1.262008733624454) internal successors, (289), 264 states have internal predecessors, (289), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:22,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 291 transitions. [2024-11-23 22:37:22,087 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 291 transitions. Word has length 109 [2024-11-23 22:37:22,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:37:22,087 INFO L471 AbstractCegarLoop]: Abstraction has 267 states and 291 transitions. [2024-11-23 22:37:22,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:22,087 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 291 transitions. [2024-11-23 22:37:22,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-11-23 22:37:22,090 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:37:22,090 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:37:22,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-23 22:37:22,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:37:22,291 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:37:22,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:37:22,291 INFO L85 PathProgramCache]: Analyzing trace with hash -865960462, now seen corresponding path program 3 times [2024-11-23 22:37:22,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:37:22,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540122625] [2024-11-23 22:37:22,291 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 22:37:22,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:37:22,418 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 22:37:22,418 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:37:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-11-23 22:37:23,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:37:23,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540122625] [2024-11-23 22:37:23,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540122625] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:37:23,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410483872] [2024-11-23 22:37:23,204 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 22:37:23,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:37:23,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:37:23,207 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:37:23,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-23 22:37:23,698 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 22:37:23,698 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:37:23,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-23 22:37:23,715 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:37:23,868 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-23 22:37:23,869 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 19 treesize of output 18 [2024-11-23 22:37:23,902 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 22:37:23,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-23 22:37:23,968 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 [2024-11-23 22:37:24,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2024-11-23 22:37:24,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:37:24,920 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 16 treesize of output 11 [2024-11-23 22:37:24,931 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 22:37:24,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-23 22:37:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-11-23 22:37:24,973 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:37:27,103 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 22:37:27,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-23 22:37:27,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2024-11-23 22:37:27,400 INFO L349 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2024-11-23 22:37:27,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 49 [2024-11-23 22:37:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-11-23 22:37:27,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410483872] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:37:27,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:37:27,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 26 [2024-11-23 22:37:27,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854544034] [2024-11-23 22:37:27,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:37:27,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-23 22:37:27,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:37:27,456 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-23 22:37:27,456 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2024-11-23 22:37:27,456 INFO L87 Difference]: Start difference. First operand 267 states and 291 transitions. Second operand has 27 states, 26 states have (on average 3.269230769230769) internal successors, (85), 26 states have internal predecessors, (85), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-23 22:37:28,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:37:28,962 INFO L93 Difference]: Finished difference Result 388 states and 409 transitions. [2024-11-23 22:37:28,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-23 22:37:28,963 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.269230769230769) internal successors, (85), 26 states have internal predecessors, (85), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 119 [2024-11-23 22:37:28,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:37:28,967 INFO L225 Difference]: With dead ends: 388 [2024-11-23 22:37:28,967 INFO L226 Difference]: Without dead ends: 388 [2024-11-23 22:37:28,968 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2024-11-23 22:37:28,969 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 495 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-23 22:37:28,969 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 687 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-23 22:37:28,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2024-11-23 22:37:28,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 208. [2024-11-23 22:37:28,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 174 states have (on average 1.264367816091954) internal successors, (220), 205 states have internal predecessors, (220), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:28,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 222 transitions. [2024-11-23 22:37:28,978 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 222 transitions. Word has length 119 [2024-11-23 22:37:28,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:37:28,980 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 222 transitions. [2024-11-23 22:37:28,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.269230769230769) internal successors, (85), 26 states have internal predecessors, (85), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-23 22:37:28,980 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 222 transitions. [2024-11-23 22:37:28,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-11-23 22:37:28,981 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:37:28,981 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2024-11-23 22:37:28,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-23 22:37:29,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:37:29,182 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:37:29,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:37:29,183 INFO L85 PathProgramCache]: Analyzing trace with hash -865957164, now seen corresponding path program 1 times [2024-11-23 22:37:29,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:37:29,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512530914] [2024-11-23 22:37:29,183 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:29,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:37:29,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:30,182 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-11-23 22:37:30,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:37:30,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512530914] [2024-11-23 22:37:30,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512530914] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:37:30,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011081277] [2024-11-23 22:37:30,183 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:30,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:37:30,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:37:30,188 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:37:30,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-23 22:37:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:30,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 1610 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-23 22:37:30,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:37:30,863 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 22:37:30,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-23 22:37:30,871 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 19 treesize of output 14 [2024-11-23 22:37:30,910 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 23 treesize of output 1 [2024-11-23 22:37:31,032 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 12 treesize of output 4 [2024-11-23 22:37:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2024-11-23 22:37:31,299 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:37:31,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2024-11-23 22:37:31,830 INFO L349 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2024-11-23 22:37:31,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 49 [2024-11-23 22:37:31,876 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-11-23 22:37:31,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011081277] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:37:31,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:37:31,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 23 [2024-11-23 22:37:31,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38731046] [2024-11-23 22:37:31,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:37:31,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-23 22:37:31,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:37:31,879 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-23 22:37:31,879 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2024-11-23 22:37:31,880 INFO L87 Difference]: Start difference. First operand 208 states and 222 transitions. Second operand has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 24 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:32,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:37:32,791 INFO L93 Difference]: Finished difference Result 269 states and 287 transitions. [2024-11-23 22:37:32,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-23 22:37:32,792 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 24 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2024-11-23 22:37:32,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:37:32,793 INFO L225 Difference]: With dead ends: 269 [2024-11-23 22:37:32,793 INFO L226 Difference]: Without dead ends: 269 [2024-11-23 22:37:32,794 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=309, Invalid=813, Unknown=0, NotChecked=0, Total=1122 [2024-11-23 22:37:32,796 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 688 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-23 22:37:32,796 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 533 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-23 22:37:32,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2024-11-23 22:37:32,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 207. [2024-11-23 22:37:32,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 177 states have (on average 1.2372881355932204) internal successors, (219), 204 states have internal predecessors, (219), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:32,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 221 transitions. [2024-11-23 22:37:32,805 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 221 transitions. Word has length 119 [2024-11-23 22:37:32,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:37:32,805 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 221 transitions. [2024-11-23 22:37:32,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 24 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:32,806 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 221 transitions. [2024-11-23 22:37:32,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-11-23 22:37:32,807 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:37:32,807 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:37:32,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-23 22:37:33,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-23 22:37:33,011 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:37:33,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:37:33,012 INFO L85 PathProgramCache]: Analyzing trace with hash 2040415721, now seen corresponding path program 1 times [2024-11-23 22:37:33,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:37:33,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478483621] [2024-11-23 22:37:33,012 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:33,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:37:33,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-11-23 22:37:34,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:37:34,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478483621] [2024-11-23 22:37:34,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478483621] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:37:34,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494625224] [2024-11-23 22:37:34,755 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:34,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:37:34,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:37:34,757 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:37:34,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-23 22:37:35,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:35,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 1627 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-23 22:37:35,318 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:37:35,344 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-11-23 22:37:35,344 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 1 case distinctions, treesize of input 21 treesize of output 23 [2024-11-23 22:37:35,364 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 [2024-11-23 22:37:35,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-23 22:37:35,634 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 22:37:35,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-23 22:37:35,661 INFO L349 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2024-11-23 22:37:35,662 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 41 treesize of output 41 [2024-11-23 22:37:35,769 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 [2024-11-23 22:37:36,281 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 28 treesize of output 20 [2024-11-23 22:37:37,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:37:37,349 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 40 treesize of output 31 [2024-11-23 22:37:37,359 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 22:37:37,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-23 22:37:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2024-11-23 22:37:37,472 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:37:39,194 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 22:37:39,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-23 22:37:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-11-23 22:37:39,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494625224] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:37:39,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:37:39,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 28 [2024-11-23 22:37:39,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313022266] [2024-11-23 22:37:39,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:37:39,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-23 22:37:39,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:37:39,659 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-23 22:37:39,660 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2024-11-23 22:37:39,660 INFO L87 Difference]: Start difference. First operand 207 states and 221 transitions. Second operand has 29 states, 28 states have (on average 3.3214285714285716) internal successors, (93), 29 states have internal predecessors, (93), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:41,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:37:41,758 INFO L93 Difference]: Finished difference Result 393 states and 413 transitions. [2024-11-23 22:37:41,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-23 22:37:41,758 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.3214285714285716) internal successors, (93), 29 states have internal predecessors, (93), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2024-11-23 22:37:41,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:37:41,761 INFO L225 Difference]: With dead ends: 393 [2024-11-23 22:37:41,761 INFO L226 Difference]: Without dead ends: 393 [2024-11-23 22:37:41,762 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=308, Invalid=1098, Unknown=0, NotChecked=0, Total=1406 [2024-11-23 22:37:41,763 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 314 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-23 22:37:41,763 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 963 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-23 22:37:41,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2024-11-23 22:37:41,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2024-11-23 22:37:41,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 363 states have (on average 1.1322314049586777) internal successors, (411), 390 states have internal predecessors, (411), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:41,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 413 transitions. [2024-11-23 22:37:41,776 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 413 transitions. Word has length 122 [2024-11-23 22:37:41,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:37:41,777 INFO L471 AbstractCegarLoop]: Abstraction has 393 states and 413 transitions. [2024-11-23 22:37:41,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.3214285714285716) internal successors, (93), 29 states have internal predecessors, (93), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:41,777 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 413 transitions. [2024-11-23 22:37:41,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-23 22:37:41,779 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:37:41,779 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:37:41,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-23 22:37:41,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-23 22:37:41,979 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:37:41,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:37:41,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1881986430, now seen corresponding path program 1 times [2024-11-23 22:37:41,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:37:41,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261762031] [2024-11-23 22:37:41,980 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:41,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:37:42,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2024-11-23 22:37:42,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:37:42,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261762031] [2024-11-23 22:37:42,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261762031] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:37:42,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:37:42,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 22:37:42,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701231748] [2024-11-23 22:37:42,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:37:42,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 22:37:42,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:37:42,366 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 22:37:42,366 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 22:37:42,366 INFO L87 Difference]: Start difference. First operand 393 states and 413 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:42,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:37:42,436 INFO L93 Difference]: Finished difference Result 399 states and 420 transitions. [2024-11-23 22:37:42,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 22:37:42,436 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2024-11-23 22:37:42,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:37:42,438 INFO L225 Difference]: With dead ends: 399 [2024-11-23 22:37:42,438 INFO L226 Difference]: Without dead ends: 399 [2024-11-23 22:37:42,439 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-23 22:37:42,440 INFO L435 NwaCegarLoop]: 124 mSDtfsCounter, 5 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 22:37:42,440 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 466 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 22:37:42,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2024-11-23 22:37:42,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 396. [2024-11-23 22:37:42,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 366 states have (on average 1.1311475409836065) internal successors, (414), 393 states have internal predecessors, (414), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:42,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 416 transitions. [2024-11-23 22:37:42,452 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 416 transitions. Word has length 124 [2024-11-23 22:37:42,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:37:42,452 INFO L471 AbstractCegarLoop]: Abstraction has 396 states and 416 transitions. [2024-11-23 22:37:42,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:42,452 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 416 transitions. [2024-11-23 22:37:42,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-23 22:37:42,453 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:37:42,454 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:37:42,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-23 22:37:42,454 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:37:42,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:37:42,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1492623931, now seen corresponding path program 1 times [2024-11-23 22:37:42,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:37:42,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075414733] [2024-11-23 22:37:42,455 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:42,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:37:42,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:44,863 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-11-23 22:37:44,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:37:44,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075414733] [2024-11-23 22:37:44,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075414733] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:37:44,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475654167] [2024-11-23 22:37:44,864 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:44,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:37:44,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:37:44,866 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:37:44,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-23 22:37:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:45,467 INFO L256 TraceCheckSpWp]: Trace formula consists of 1632 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-23 22:37:45,472 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:37:45,481 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 11 [2024-11-23 22:37:45,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-23 22:37:45,591 INFO L349 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2024-11-23 22:37:45,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2024-11-23 22:37:45,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:37:45,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-23 22:37:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-11-23 22:37:46,387 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:37:47,140 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-11-23 22:37:47,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475654167] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:37:47,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:37:47,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2024-11-23 22:37:47,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531606042] [2024-11-23 22:37:47,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:37:47,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-23 22:37:47,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:37:47,142 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-23 22:37:47,142 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2024-11-23 22:37:47,143 INFO L87 Difference]: Start difference. First operand 396 states and 416 transitions. Second operand has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:47,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:37:47,614 INFO L93 Difference]: Finished difference Result 421 states and 442 transitions. [2024-11-23 22:37:47,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-23 22:37:47,616 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2024-11-23 22:37:47,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:37:47,619 INFO L225 Difference]: With dead ends: 421 [2024-11-23 22:37:47,619 INFO L226 Difference]: Without dead ends: 421 [2024-11-23 22:37:47,619 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=629, Unknown=0, NotChecked=0, Total=812 [2024-11-23 22:37:47,620 INFO L435 NwaCegarLoop]: 115 mSDtfsCounter, 231 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 1317 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-23 22:37:47,620 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 1317 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 22:37:47,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2024-11-23 22:37:47,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 399. [2024-11-23 22:37:47,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 369 states have (on average 1.1300813008130082) internal successors, (417), 396 states have internal predecessors, (417), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:47,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 419 transitions. [2024-11-23 22:37:47,636 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 419 transitions. Word has length 125 [2024-11-23 22:37:47,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:37:47,636 INFO L471 AbstractCegarLoop]: Abstraction has 399 states and 419 transitions. [2024-11-23 22:37:47,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:47,636 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 419 transitions. [2024-11-23 22:37:47,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-23 22:37:47,639 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:37:47,639 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:37:47,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-23 22:37:47,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-23 22:37:47,840 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:37:47,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:37:47,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1842268952, now seen corresponding path program 1 times [2024-11-23 22:37:47,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:37:47,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392995806] [2024-11-23 22:37:47,841 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:47,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:37:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2024-11-23 22:37:48,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:37:48,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392995806] [2024-11-23 22:37:48,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392995806] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:37:48,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:37:48,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 22:37:48,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589096376] [2024-11-23 22:37:48,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:37:48,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 22:37:48,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:37:48,123 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 22:37:48,123 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 22:37:48,124 INFO L87 Difference]: Start difference. First operand 399 states and 419 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:48,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:37:48,138 INFO L93 Difference]: Finished difference Result 400 states and 420 transitions. [2024-11-23 22:37:48,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 22:37:48,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2024-11-23 22:37:48,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:37:48,141 INFO L225 Difference]: With dead ends: 400 [2024-11-23 22:37:48,141 INFO L226 Difference]: Without dead ends: 400 [2024-11-23 22:37:48,141 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 [2024-11-23 22:37:48,142 INFO L435 NwaCegarLoop]: 128 mSDtfsCounter, 0 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-23 22:37:48,144 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 250 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 22:37:48,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2024-11-23 22:37:48,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2024-11-23 22:37:48,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 370 states have (on average 1.1297297297297297) internal successors, (418), 397 states have internal predecessors, (418), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:48,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 420 transitions. [2024-11-23 22:37:48,155 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 420 transitions. Word has length 130 [2024-11-23 22:37:48,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:37:48,156 INFO L471 AbstractCegarLoop]: Abstraction has 400 states and 420 transitions. [2024-11-23 22:37:48,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:48,156 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 420 transitions. [2024-11-23 22:37:48,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-23 22:37:48,160 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:37:48,160 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:37:48,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-23 22:37:48,160 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:37:48,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:37:48,161 INFO L85 PathProgramCache]: Analyzing trace with hash -743475706, now seen corresponding path program 1 times [2024-11-23 22:37:48,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:37:48,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252286242] [2024-11-23 22:37:48,161 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:48,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:37:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:49,434 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-11-23 22:37:49,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:37:49,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252286242] [2024-11-23 22:37:49,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252286242] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:37:49,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793251650] [2024-11-23 22:37:49,435 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:49,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:37:49,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:37:49,440 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:37:49,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-23 22:37:50,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:50,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 1668 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-23 22:37:50,232 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:37:50,264 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-23 22:37:50,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-23 22:37:50,501 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-23 22:37:50,501 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 [2024-11-23 22:37:50,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:37:50,523 INFO L349 Elim1Store]: treesize reduction 29, result has 3.3 percent of original size [2024-11-23 22:37:50,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 1 [2024-11-23 22:37:50,586 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-23 22:37:50,586 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 18 treesize of output 17 [2024-11-23 22:37:50,627 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 23 treesize of output 1 [2024-11-23 22:37:50,729 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 32 treesize of output 16 [2024-11-23 22:37:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2024-11-23 22:37:51,389 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 22:37:51,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793251650] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:37:51,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 22:37:51,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2024-11-23 22:37:51,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25336125] [2024-11-23 22:37:51,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:37:51,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-23 22:37:51,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:37:51,390 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-23 22:37:51,390 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2024-11-23 22:37:51,390 INFO L87 Difference]: Start difference. First operand 400 states and 420 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:51,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:37:51,480 INFO L93 Difference]: Finished difference Result 398 states and 418 transitions. [2024-11-23 22:37:51,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 22:37:51,481 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2024-11-23 22:37:51,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:37:51,483 INFO L225 Difference]: With dead ends: 398 [2024-11-23 22:37:51,483 INFO L226 Difference]: Without dead ends: 398 [2024-11-23 22:37:51,483 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2024-11-23 22:37:51,484 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 285 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 22:37:51,484 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 83 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 22:37:51,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2024-11-23 22:37:51,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2024-11-23 22:37:51,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 370 states have (on average 1.1243243243243244) internal successors, (416), 395 states have internal predecessors, (416), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:51,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 418 transitions. [2024-11-23 22:37:51,495 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 418 transitions. Word has length 131 [2024-11-23 22:37:51,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:37:51,495 INFO L471 AbstractCegarLoop]: Abstraction has 398 states and 418 transitions. [2024-11-23 22:37:51,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:51,495 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 418 transitions. [2024-11-23 22:37:51,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-23 22:37:51,499 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:37:51,499 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:37:51,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-23 22:37:51,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-23 22:37:51,700 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:37:51,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:37:51,701 INFO L85 PathProgramCache]: Analyzing trace with hash -743475705, now seen corresponding path program 1 times [2024-11-23 22:37:51,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:37:51,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519290166] [2024-11-23 22:37:51,701 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:51,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:37:51,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-11-23 22:37:53,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:37:53,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519290166] [2024-11-23 22:37:53,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519290166] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:37:53,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761552216] [2024-11-23 22:37:53,806 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:53,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:37:53,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:37:53,808 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:37:53,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-23 22:37:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:37:54,423 INFO L256 TraceCheckSpWp]: Trace formula consists of 1668 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-23 22:37:54,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:37:54,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:37:54,466 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 [2024-11-23 22:37:54,484 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-23 22:37:54,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-23 22:37:55,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:37:55,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:37:55,016 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 19 treesize of output 9 [2024-11-23 22:37:55,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:37:55,036 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-23 22:37:55,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-23 22:37:55,186 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-23 22:37:55,186 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 [2024-11-23 22:37:55,265 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 [2024-11-23 22:37:55,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 [2024-11-23 22:37:56,362 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2024-11-23 22:37:56,362 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:37:57,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761552216] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:37:57,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 22:37:57,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 26 [2024-11-23 22:37:57,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572159728] [2024-11-23 22:37:57,376 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 22:37:57,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-23 22:37:57,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:37:57,377 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-23 22:37:57,378 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=950, Unknown=0, NotChecked=0, Total=1190 [2024-11-23 22:37:57,378 INFO L87 Difference]: Start difference. First operand 398 states and 418 transitions. Second operand has 27 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-23 22:37:58,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:37:58,514 INFO L93 Difference]: Finished difference Result 401 states and 421 transitions. [2024-11-23 22:37:58,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-23 22:37:58,515 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 131 [2024-11-23 22:37:58,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:37:58,516 INFO L225 Difference]: With dead ends: 401 [2024-11-23 22:37:58,516 INFO L226 Difference]: Without dead ends: 401 [2024-11-23 22:37:58,517 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=504, Invalid=1566, Unknown=0, NotChecked=0, Total=2070 [2024-11-23 22:37:58,517 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 1129 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1129 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-23 22:37:58,518 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1129 Valid, 636 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-23 22:37:58,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2024-11-23 22:37:58,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 400. [2024-11-23 22:37:58,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 373 states have (on average 1.1206434316353888) internal successors, (418), 397 states have internal predecessors, (418), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:37:58,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 420 transitions. [2024-11-23 22:37:58,527 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 420 transitions. Word has length 131 [2024-11-23 22:37:58,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:37:58,528 INFO L471 AbstractCegarLoop]: Abstraction has 400 states and 420 transitions. [2024-11-23 22:37:58,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-23 22:37:58,528 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 420 transitions. [2024-11-23 22:37:58,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-23 22:37:58,529 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:37:58,530 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:37:58,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-23 22:37:58,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-23 22:37:58,731 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:37:58,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:37:58,731 INFO L85 PathProgramCache]: Analyzing trace with hash -473910336, now seen corresponding path program 1 times [2024-11-23 22:37:58,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:37:58,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959702061] [2024-11-23 22:37:58,731 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:37:58,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:37:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:38:00,474 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-11-23 22:38:00,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:38:00,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959702061] [2024-11-23 22:38:00,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959702061] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:38:00,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68953440] [2024-11-23 22:38:00,475 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:38:00,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:38:00,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:38:00,477 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:38:00,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-23 22:38:01,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:38:01,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 1689 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-23 22:38:01,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:38:01,262 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-23 22:38:01,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-23 22:38:01,268 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 [2024-11-23 22:38:01,772 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 22:38:01,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-23 22:38:01,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:38:01,784 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 [2024-11-23 22:38:01,807 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-23 22:38:01,807 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 1 case distinctions, treesize of input 19 treesize of output 13 [2024-11-23 22:38:01,956 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-23 22:38:01,956 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 18 treesize of output 17 [2024-11-23 22:38:02,047 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 23 treesize of output 1 [2024-11-23 22:38:02,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 60 treesize of output 44 [2024-11-23 22:38:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2024-11-23 22:38:04,610 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:38:05,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68953440] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:38:05,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 22:38:05,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 20 [2024-11-23 22:38:05,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107943706] [2024-11-23 22:38:05,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 22:38:05,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-23 22:38:05,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:38:05,551 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-23 22:38:05,551 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2024-11-23 22:38:05,551 INFO L87 Difference]: Start difference. First operand 400 states and 420 transitions. Second operand has 21 states, 20 states have (on average 5.3) internal successors, (106), 21 states have internal predecessors, (106), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-23 22:38:06,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:38:06,371 INFO L93 Difference]: Finished difference Result 409 states and 429 transitions. [2024-11-23 22:38:06,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-23 22:38:06,371 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.3) internal successors, (106), 21 states have internal predecessors, (106), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 135 [2024-11-23 22:38:06,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:38:06,374 INFO L225 Difference]: With dead ends: 409 [2024-11-23 22:38:06,374 INFO L226 Difference]: Without dead ends: 409 [2024-11-23 22:38:06,374 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2024-11-23 22:38:06,376 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 637 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-23 22:38:06,381 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [638 Valid, 408 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-23 22:38:06,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2024-11-23 22:38:06,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 408. [2024-11-23 22:38:06,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 381 states have (on average 1.1181102362204725) internal successors, (426), 405 states have internal predecessors, (426), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:38:06,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 428 transitions. [2024-11-23 22:38:06,392 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 428 transitions. Word has length 135 [2024-11-23 22:38:06,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:38:06,394 INFO L471 AbstractCegarLoop]: Abstraction has 408 states and 428 transitions. [2024-11-23 22:38:06,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.3) internal successors, (106), 21 states have internal predecessors, (106), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-23 22:38:06,394 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 428 transitions. [2024-11-23 22:38:06,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-11-23 22:38:06,396 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:38:06,396 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:38:06,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-23 22:38:06,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-23 22:38:06,597 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:38:06,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:38:06,598 INFO L85 PathProgramCache]: Analyzing trace with hash -871177806, now seen corresponding path program 2 times [2024-11-23 22:38:06,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:38:06,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162399615] [2024-11-23 22:38:06,598 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:38:06,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:38:06,799 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 22:38:06,799 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:38:09,193 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2024-11-23 22:38:09,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:38:09,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162399615] [2024-11-23 22:38:09,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162399615] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:38:09,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564003826] [2024-11-23 22:38:09,194 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:38:09,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:38:09,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:38:09,197 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:38:09,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-23 22:38:09,868 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 22:38:09,868 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:38:09,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 1731 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-23 22:38:09,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:38:09,954 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-23 22:38:09,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-23 22:38:09,961 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 [2024-11-23 22:38:10,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:38:10,480 INFO L349 Elim1Store]: treesize reduction 40, result has 25.9 percent of original size [2024-11-23 22:38:10,480 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 3 case distinctions, treesize of input 27 treesize of output 28 [2024-11-23 22:38:10,487 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 19 treesize of output 9 [2024-11-23 22:38:10,520 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-23 22:38:10,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-23 22:38:10,529 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 [2024-11-23 22:38:10,859 INFO L349 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2024-11-23 22:38:10,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 51 treesize of output 77 [2024-11-23 22:38:10,869 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 46 treesize of output 39 [2024-11-23 22:38:11,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-23 22:38:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2024-11-23 22:38:12,597 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:38:14,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564003826] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:38:14,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 22:38:14,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 33 [2024-11-23 22:38:14,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923628940] [2024-11-23 22:38:14,136 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 22:38:14,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-23 22:38:14,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:38:14,137 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-23 22:38:14,138 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=1742, Unknown=0, NotChecked=0, Total=2070 [2024-11-23 22:38:14,138 INFO L87 Difference]: Start difference. First operand 408 states and 428 transitions. Second operand has 34 states, 32 states have (on average 4.0625) internal successors, (130), 31 states have internal predecessors, (130), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-23 22:38:16,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:38:16,058 INFO L93 Difference]: Finished difference Result 425 states and 445 transitions. [2024-11-23 22:38:16,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-23 22:38:16,058 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 4.0625) internal successors, (130), 31 states have internal predecessors, (130), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 143 [2024-11-23 22:38:16,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:38:16,060 INFO L225 Difference]: With dead ends: 425 [2024-11-23 22:38:16,060 INFO L226 Difference]: Without dead ends: 425 [2024-11-23 22:38:16,061 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=809, Invalid=2973, Unknown=0, NotChecked=0, Total=3782 [2024-11-23 22:38:16,062 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 880 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-23 22:38:16,062 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [881 Valid, 904 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1227 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-23 22:38:16,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2024-11-23 22:38:16,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 424. [2024-11-23 22:38:16,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 397 states have (on average 1.1133501259445844) internal successors, (442), 421 states have internal predecessors, (442), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:38:16,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 444 transitions. [2024-11-23 22:38:16,070 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 444 transitions. Word has length 143 [2024-11-23 22:38:16,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:38:16,071 INFO L471 AbstractCegarLoop]: Abstraction has 424 states and 444 transitions. [2024-11-23 22:38:16,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 4.0625) internal successors, (130), 31 states have internal predecessors, (130), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-23 22:38:16,071 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 444 transitions. [2024-11-23 22:38:16,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-23 22:38:16,073 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:38:16,073 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:38:16,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-23 22:38:16,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:38:16,274 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:38:16,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:38:16,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1819998314, now seen corresponding path program 3 times [2024-11-23 22:38:16,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:38:16,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493806046] [2024-11-23 22:38:16,274 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 22:38:16,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:38:16,401 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 22:38:16,401 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:38:17,286 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 503 trivial. 0 not checked. [2024-11-23 22:38:17,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:38:17,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493806046] [2024-11-23 22:38:17,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493806046] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:38:17,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316868262] [2024-11-23 22:38:17,287 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 22:38:17,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:38:17,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:38:17,289 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:38:17,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-23 22:38:17,920 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 22:38:17,920 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:38:17,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 1210 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-23 22:38:17,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:38:17,976 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-23 22:38:17,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-23 22:38:17,982 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 [2024-11-23 22:38:18,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:38:18,417 INFO L349 Elim1Store]: treesize reduction 42, result has 25.0 percent of original size [2024-11-23 22:38:18,417 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 3 case distinctions, treesize of input 29 treesize of output 23 [2024-11-23 22:38:18,428 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 19 treesize of output 9 [2024-11-23 22:38:18,445 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-23 22:38:18,446 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 [2024-11-23 22:38:18,460 INFO L349 Elim1Store]: treesize reduction 29, result has 3.3 percent of original size [2024-11-23 22:38:18,460 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 1 [2024-11-23 22:38:18,527 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-23 22:38:18,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-23 22:38:18,535 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 [2024-11-23 22:38:18,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-23 22:38:18,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2024-11-23 22:38:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 503 trivial. 0 not checked. [2024-11-23 22:38:19,263 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:38:19,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316868262] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:38:19,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 22:38:19,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 22 [2024-11-23 22:38:19,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968292570] [2024-11-23 22:38:19,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 22:38:19,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-23 22:38:19,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:38:19,989 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-23 22:38:19,989 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2024-11-23 22:38:19,989 INFO L87 Difference]: Start difference. First operand 424 states and 444 transitions. Second operand has 23 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-23 22:38:20,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:38:20,771 INFO L93 Difference]: Finished difference Result 423 states and 443 transitions. [2024-11-23 22:38:20,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-23 22:38:20,772 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 159 [2024-11-23 22:38:20,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:38:20,773 INFO L225 Difference]: With dead ends: 423 [2024-11-23 22:38:20,773 INFO L226 Difference]: Without dead ends: 423 [2024-11-23 22:38:20,774 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=414, Invalid=1308, Unknown=0, NotChecked=0, Total=1722 [2024-11-23 22:38:20,774 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 542 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-23 22:38:20,775 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 507 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-23 22:38:20,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2024-11-23 22:38:20,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 421. [2024-11-23 22:38:20,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 395 states have (on average 1.111392405063291) internal successors, (439), 418 states have internal predecessors, (439), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:38:20,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 441 transitions. [2024-11-23 22:38:20,783 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 441 transitions. Word has length 159 [2024-11-23 22:38:20,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:38:20,783 INFO L471 AbstractCegarLoop]: Abstraction has 421 states and 441 transitions. [2024-11-23 22:38:20,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-23 22:38:20,784 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 441 transitions. [2024-11-23 22:38:20,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2024-11-23 22:38:20,785 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:38:20,786 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:38:20,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-23 22:38:20,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:38:20,987 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr58ASSERT_VIOLATIONUNSUPPORTED_FEATURE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:38:20,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:38:20,987 INFO L85 PathProgramCache]: Analyzing trace with hash 162454801, now seen corresponding path program 1 times [2024-11-23 22:38:20,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:38:20,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464542740] [2024-11-23 22:38:20,987 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:38:20,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:38:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:38:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2024-11-23 22:38:21,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:38:21,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464542740] [2024-11-23 22:38:21,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464542740] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:38:21,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805344458] [2024-11-23 22:38:21,388 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:38:21,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:38:21,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:38:21,391 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:38:21,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-23 22:38:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:38:22,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 1838 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 22:38:22,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:38:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2024-11-23 22:38:22,228 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:38:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2024-11-23 22:38:22,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805344458] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:38:22,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:38:22,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2024-11-23 22:38:22,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663770777] [2024-11-23 22:38:22,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:38:22,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-23 22:38:22,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:38:22,387 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-23 22:38:22,387 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2024-11-23 22:38:22,388 INFO L87 Difference]: Start difference. First operand 421 states and 441 transitions. Second operand has 19 states, 19 states have (on average 6.0) internal successors, (114), 19 states have internal predecessors, (114), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:38:22,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:38:22,476 INFO L93 Difference]: Finished difference Result 457 states and 477 transitions. [2024-11-23 22:38:22,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-23 22:38:22,476 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.0) internal successors, (114), 19 states have internal predecessors, (114), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 162 [2024-11-23 22:38:22,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:38:22,478 INFO L225 Difference]: With dead ends: 457 [2024-11-23 22:38:22,478 INFO L226 Difference]: Without dead ends: 457 [2024-11-23 22:38:22,479 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2024-11-23 22:38:22,479 INFO L435 NwaCegarLoop]: 122 mSDtfsCounter, 6 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 22:38:22,479 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 605 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 22:38:22,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2024-11-23 22:38:22,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 457. [2024-11-23 22:38:22,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 431 states have (on average 1.1020881670533642) internal successors, (475), 454 states have internal predecessors, (475), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:38:22,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 477 transitions. [2024-11-23 22:38:22,491 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 477 transitions. Word has length 162 [2024-11-23 22:38:22,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:38:22,491 INFO L471 AbstractCegarLoop]: Abstraction has 457 states and 477 transitions. [2024-11-23 22:38:22,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.0) internal successors, (114), 19 states have internal predecessors, (114), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:38:22,491 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 477 transitions. [2024-11-23 22:38:22,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2024-11-23 22:38:22,492 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:38:22,493 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:38:22,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-23 22:38:22,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-23 22:38:22,694 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:38:22,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:38:22,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1822096054, now seen corresponding path program 2 times [2024-11-23 22:38:22,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:38:22,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368148866] [2024-11-23 22:38:22,694 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:38:22,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:38:22,926 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 22:38:22,927 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:38:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 0 proven. 534 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2024-11-23 22:38:24,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:38:24,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368148866] [2024-11-23 22:38:24,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368148866] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:38:24,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762901770] [2024-11-23 22:38:24,073 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:38:24,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:38:24,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:38:24,075 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:38:24,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-23 22:38:25,040 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 22:38:25,040 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:38:25,051 INFO L256 TraceCheckSpWp]: Trace formula consists of 2006 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-23 22:38:25,059 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:38:25,320 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 [2024-11-23 22:38:25,352 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 [2024-11-23 22:38:25,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-23 22:38:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 0 proven. 534 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2024-11-23 22:38:25,671 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:38:25,846 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 18 treesize of output 16 [2024-11-23 22:38:25,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-23 22:38:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 0 proven. 534 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2024-11-23 22:38:26,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762901770] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:38:26,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:38:26,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 15 [2024-11-23 22:38:26,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889374] [2024-11-23 22:38:26,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:38:26,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-23 22:38:26,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:38:26,069 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-23 22:38:26,069 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-23 22:38:26,069 INFO L87 Difference]: Start difference. First operand 457 states and 477 transitions. Second operand has 16 states, 15 states have (on average 8.0) internal successors, (120), 16 states have internal predecessors, (120), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:38:26,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:38:26,623 INFO L93 Difference]: Finished difference Result 608 states and 642 transitions. [2024-11-23 22:38:26,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-23 22:38:26,623 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 8.0) internal successors, (120), 16 states have internal predecessors, (120), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2024-11-23 22:38:26,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:38:26,625 INFO L225 Difference]: With dead ends: 608 [2024-11-23 22:38:26,625 INFO L226 Difference]: Without dead ends: 608 [2024-11-23 22:38:26,625 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2024-11-23 22:38:26,626 INFO L435 NwaCegarLoop]: 119 mSDtfsCounter, 342 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-23 22:38:26,626 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 882 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-23 22:38:26,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2024-11-23 22:38:26,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 465. [2024-11-23 22:38:26,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 439 states have (on average 1.1047835990888382) internal successors, (485), 462 states have internal predecessors, (485), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:38:26,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 487 transitions. [2024-11-23 22:38:26,638 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 487 transitions. Word has length 187 [2024-11-23 22:38:26,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:38:26,638 INFO L471 AbstractCegarLoop]: Abstraction has 465 states and 487 transitions. [2024-11-23 22:38:26,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 8.0) internal successors, (120), 16 states have internal predecessors, (120), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:38:26,639 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 487 transitions. [2024-11-23 22:38:26,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2024-11-23 22:38:26,640 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:38:26,640 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:38:26,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-23 22:38:26,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-23 22:38:26,841 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:38:26,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:38:26,842 INFO L85 PathProgramCache]: Analyzing trace with hash -652588298, now seen corresponding path program 1 times [2024-11-23 22:38:26,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:38:26,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786577808] [2024-11-23 22:38:26,842 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:38:26,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:38:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:38:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1194 trivial. 0 not checked. [2024-11-23 22:38:27,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:38:27,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786577808] [2024-11-23 22:38:27,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786577808] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:38:27,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:38:27,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 22:38:27,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728881187] [2024-11-23 22:38:27,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:38:27,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 22:38:27,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:38:27,264 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 22:38:27,264 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 22:38:27,264 INFO L87 Difference]: Start difference. First operand 465 states and 487 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:38:27,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:38:27,273 INFO L93 Difference]: Finished difference Result 428 states and 442 transitions. [2024-11-23 22:38:27,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 22:38:27,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 188 [2024-11-23 22:38:27,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:38:27,275 INFO L225 Difference]: With dead ends: 428 [2024-11-23 22:38:27,275 INFO L226 Difference]: Without dead ends: 428 [2024-11-23 22:38:27,275 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 [2024-11-23 22:38:27,276 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 0 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-23 22:38:27,276 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 157 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 22:38:27,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2024-11-23 22:38:27,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 428. [2024-11-23 22:38:27,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 418 states have (on average 1.0526315789473684) internal successors, (440), 425 states have internal predecessors, (440), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:38:27,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 442 transitions. [2024-11-23 22:38:27,285 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 442 transitions. Word has length 188 [2024-11-23 22:38:27,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:38:27,286 INFO L471 AbstractCegarLoop]: Abstraction has 428 states and 442 transitions. [2024-11-23 22:38:27,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:38:27,286 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 442 transitions. [2024-11-23 22:38:27,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2024-11-23 22:38:27,294 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:38:27,294 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:38:27,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-11-23 22:38:27,295 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr45ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:38:27,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:38:27,295 INFO L85 PathProgramCache]: Analyzing trace with hash -650402603, now seen corresponding path program 1 times [2024-11-23 22:38:27,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:38:27,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231313026] [2024-11-23 22:38:27,296 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:38:27,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:38:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:38:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 0 proven. 534 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2024-11-23 22:38:29,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:38:29,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231313026] [2024-11-23 22:38:29,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231313026] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:38:29,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675988311] [2024-11-23 22:38:29,441 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:38:29,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:38:29,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:38:29,443 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:38:29,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-23 22:38:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:38:30,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 2008 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-23 22:38:30,518 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:38:30,643 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 [2024-11-23 22:38:30,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-23 22:38:30,684 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 19 treesize of output 1 [2024-11-23 22:38:31,173 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 21 treesize of output 9 [2024-11-23 22:38:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 0 proven. 655 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2024-11-23 22:38:31,197 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:38:31,723 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 14 [2024-11-23 22:38:31,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-23 22:38:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 0 proven. 534 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2024-11-23 22:38:31,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675988311] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:38:31,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:38:31,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 21 [2024-11-23 22:38:31,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840245897] [2024-11-23 22:38:31,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:38:31,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-23 22:38:31,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:38:31,854 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-23 22:38:31,854 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2024-11-23 22:38:31,854 INFO L87 Difference]: Start difference. First operand 428 states and 442 transitions. Second operand has 22 states, 21 states have (on average 6.619047619047619) internal successors, (139), 22 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:38:32,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:38:32,393 INFO L93 Difference]: Finished difference Result 533 states and 553 transitions. [2024-11-23 22:38:32,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-23 22:38:32,394 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 6.619047619047619) internal successors, (139), 22 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 188 [2024-11-23 22:38:32,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:38:32,395 INFO L225 Difference]: With dead ends: 533 [2024-11-23 22:38:32,395 INFO L226 Difference]: Without dead ends: 533 [2024-11-23 22:38:32,396 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2024-11-23 22:38:32,396 INFO L435 NwaCegarLoop]: 89 mSDtfsCounter, 206 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-23 22:38:32,396 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 751 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-23 22:38:32,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2024-11-23 22:38:32,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 429. [2024-11-23 22:38:32,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 419 states have (on average 1.0525059665871122) internal successors, (441), 426 states have internal predecessors, (441), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:38:32,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 443 transitions. [2024-11-23 22:38:32,405 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 443 transitions. Word has length 188 [2024-11-23 22:38:32,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:38:32,406 INFO L471 AbstractCegarLoop]: Abstraction has 429 states and 443 transitions. [2024-11-23 22:38:32,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 6.619047619047619) internal successors, (139), 22 states have internal predecessors, (139), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:38:32,406 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 443 transitions. [2024-11-23 22:38:32,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2024-11-23 22:38:32,408 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:38:32,408 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:38:32,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-23 22:38:32,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-23 22:38:32,612 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:38:32,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:38:32,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1312356012, now seen corresponding path program 1 times [2024-11-23 22:38:32,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:38:32,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082424362] [2024-11-23 22:38:32,613 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:38:32,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:38:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:38:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 525 proven. 7 refuted. 0 times theorem prover too weak. 662 trivial. 0 not checked. [2024-11-23 22:38:34,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:38:34,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082424362] [2024-11-23 22:38:34,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082424362] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:38:34,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240322591] [2024-11-23 22:38:34,032 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:38:34,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:38:34,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:38:34,035 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:38:34,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-23 22:38:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:38:35,082 INFO L256 TraceCheckSpWp]: Trace formula consists of 2010 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-23 22:38:35,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:38:35,116 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-23 22:38:35,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-23 22:38:35,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:38:35,231 INFO L349 Elim1Store]: treesize reduction 34, result has 29.2 percent of original size [2024-11-23 22:38:35,231 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 24 treesize of output 20 [2024-11-23 22:38:35,240 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 [2024-11-23 22:38:35,289 INFO L349 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2024-11-23 22:38:35,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2024-11-23 22:38:35,537 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-23 22:38:35,537 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 18 treesize of output 17 [2024-11-23 22:38:35,570 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 23 treesize of output 1 [2024-11-23 22:38:35,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2024-11-23 22:38:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 520 proven. 49 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2024-11-23 22:38:36,085 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:38:36,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 39 proven. 532 refuted. 0 times theorem prover too weak. 623 trivial. 0 not checked. [2024-11-23 22:38:36,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240322591] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:38:36,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:38:36,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 10] total 21 [2024-11-23 22:38:36,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850544602] [2024-11-23 22:38:36,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:38:36,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-23 22:38:36,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:38:36,981 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-23 22:38:36,981 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2024-11-23 22:38:36,982 INFO L87 Difference]: Start difference. First operand 429 states and 443 transitions. Second operand has 22 states, 21 states have (on average 6.904761904761905) internal successors, (145), 22 states have internal predecessors, (145), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-23 22:38:37,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:38:37,073 INFO L93 Difference]: Finished difference Result 428 states and 442 transitions. [2024-11-23 22:38:37,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 22:38:37,074 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 6.904761904761905) internal successors, (145), 22 states have internal predecessors, (145), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 189 [2024-11-23 22:38:37,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:38:37,075 INFO L225 Difference]: With dead ends: 428 [2024-11-23 22:38:37,075 INFO L226 Difference]: Without dead ends: 428 [2024-11-23 22:38:37,075 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 366 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2024-11-23 22:38:37,076 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 143 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 22:38:37,076 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 58 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 22:38:37,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2024-11-23 22:38:37,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 428. [2024-11-23 22:38:37,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 419 states have (on average 1.0501193317422435) internal successors, (440), 425 states have internal predecessors, (440), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:38:37,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 442 transitions. [2024-11-23 22:38:37,083 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 442 transitions. Word has length 189 [2024-11-23 22:38:37,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:38:37,083 INFO L471 AbstractCegarLoop]: Abstraction has 428 states and 442 transitions. [2024-11-23 22:38:37,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 6.904761904761905) internal successors, (145), 22 states have internal predecessors, (145), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-23 22:38:37,084 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 442 transitions. [2024-11-23 22:38:37,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2024-11-23 22:38:37,086 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:38:37,086 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:38:37,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-23 22:38:37,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-23 22:38:37,287 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:38:37,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:38:37,288 INFO L85 PathProgramCache]: Analyzing trace with hash 2028330935, now seen corresponding path program 1 times [2024-11-23 22:38:37,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:38:37,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020559293] [2024-11-23 22:38:37,288 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:38:37,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:38:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:38:38,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 0 proven. 534 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2024-11-23 22:38:38,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:38:38,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020559293] [2024-11-23 22:38:38,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020559293] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:38:38,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667763111] [2024-11-23 22:38:38,984 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:38:38,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:38:38,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:38:38,987 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:38:38,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-23 22:38:40,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:38:40,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 2012 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-23 22:38:40,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:38:40,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:38:40,105 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 [2024-11-23 22:38:40,123 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-23 22:38:40,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-23 22:38:40,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:38:40,405 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 [2024-11-23 22:38:40,435 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-23 22:38:40,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-23 22:38:40,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:38:40,470 INFO L349 Elim1Store]: treesize reduction 55, result has 1.8 percent of original size [2024-11-23 22:38:40,470 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 3 case distinctions, treesize of input 29 treesize of output 1 [2024-11-23 22:38:40,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:38:40,564 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 [2024-11-23 22:38:40,591 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-23 22:38:40,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-23 22:38:41,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:38:41,426 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 [2024-11-23 22:38:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 0 proven. 534 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2024-11-23 22:38:42,089 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:38:43,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667763111] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:38:43,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 22:38:43,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 21 [2024-11-23 22:38:43,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399864095] [2024-11-23 22:38:43,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 22:38:43,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-23 22:38:43,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:38:43,518 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-23 22:38:43,518 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=623, Unknown=0, NotChecked=0, Total=870 [2024-11-23 22:38:43,518 INFO L87 Difference]: Start difference. First operand 428 states and 442 transitions. Second operand has 22 states, 21 states have (on average 5.904761904761905) internal successors, (124), 22 states have internal predecessors, (124), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-23 22:38:44,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:38:44,384 INFO L93 Difference]: Finished difference Result 427 states and 441 transitions. [2024-11-23 22:38:44,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-23 22:38:44,384 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 5.904761904761905) internal successors, (124), 22 states have internal predecessors, (124), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 190 [2024-11-23 22:38:44,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:38:44,385 INFO L225 Difference]: With dead ends: 427 [2024-11-23 22:38:44,385 INFO L226 Difference]: Without dead ends: 427 [2024-11-23 22:38:44,386 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 311 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=563, Invalid=1243, Unknown=0, NotChecked=0, Total=1806 [2024-11-23 22:38:44,386 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 331 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-23 22:38:44,386 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 393 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-23 22:38:44,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2024-11-23 22:38:44,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 427. [2024-11-23 22:38:44,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 419 states have (on average 1.0477326968973748) internal successors, (439), 424 states have internal predecessors, (439), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:38:44,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 441 transitions. [2024-11-23 22:38:44,394 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 441 transitions. Word has length 190 [2024-11-23 22:38:44,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:38:44,395 INFO L471 AbstractCegarLoop]: Abstraction has 427 states and 441 transitions. [2024-11-23 22:38:44,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 5.904761904761905) internal successors, (124), 22 states have internal predecessors, (124), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-23 22:38:44,396 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 441 transitions. [2024-11-23 22:38:44,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2024-11-23 22:38:44,397 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:38:44,397 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:38:44,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-23 22:38:44,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-23 22:38:44,598 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:38:44,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:38:44,599 INFO L85 PathProgramCache]: Analyzing trace with hash 473721622, now seen corresponding path program 1 times [2024-11-23 22:38:44,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:38:44,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529675370] [2024-11-23 22:38:44,599 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:38:44,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:38:44,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:38:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 0 proven. 534 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2024-11-23 22:38:46,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:38:46,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529675370] [2024-11-23 22:38:46,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529675370] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:38:46,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927190898] [2024-11-23 22:38:46,151 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:38:46,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:38:46,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:38:46,154 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:38:46,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-23 22:38:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:38:47,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 2027 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-23 22:38:47,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:38:47,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:38:47,356 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 19 treesize of output 14 [2024-11-23 22:38:47,368 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 22:38:47,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-23 22:38:47,935 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-23 22:38:47,936 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 19 treesize of output 18 [2024-11-23 22:38:47,954 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 22:38:47,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-23 22:38:47,995 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 23 treesize of output 1 [2024-11-23 22:38:48,094 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 12 treesize of output 4 [2024-11-23 22:38:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 1 proven. 552 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2024-11-23 22:38:48,358 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:38:49,826 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-23 22:38:49,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-23 22:38:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 3 proven. 531 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2024-11-23 22:38:50,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927190898] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:38:50,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:38:50,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 32 [2024-11-23 22:38:50,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764745090] [2024-11-23 22:38:50,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:38:50,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-23 22:38:50,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:38:50,088 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-23 22:38:50,088 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2024-11-23 22:38:50,088 INFO L87 Difference]: Start difference. First operand 427 states and 441 transitions. Second operand has 33 states, 32 states have (on average 5.5) internal successors, (176), 33 states have internal predecessors, (176), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:38:51,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:38:51,324 INFO L93 Difference]: Finished difference Result 514 states and 530 transitions. [2024-11-23 22:38:51,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-23 22:38:51,325 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 5.5) internal successors, (176), 33 states have internal predecessors, (176), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2024-11-23 22:38:51,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:38:51,327 INFO L225 Difference]: With dead ends: 514 [2024-11-23 22:38:51,327 INFO L226 Difference]: Without dead ends: 514 [2024-11-23 22:38:51,328 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 368 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=358, Invalid=1622, Unknown=0, NotChecked=0, Total=1980 [2024-11-23 22:38:51,329 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 669 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-23 22:38:51,329 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [669 Valid, 1025 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-23 22:38:51,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2024-11-23 22:38:51,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 428. [2024-11-23 22:38:51,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 421 states have (on average 1.0475059382422802) internal successors, (441), 425 states have internal predecessors, (441), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:38:51,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 443 transitions. [2024-11-23 22:38:51,339 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 443 transitions. Word has length 195 [2024-11-23 22:38:51,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:38:51,340 INFO L471 AbstractCegarLoop]: Abstraction has 428 states and 443 transitions. [2024-11-23 22:38:51,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 5.5) internal successors, (176), 33 states have internal predecessors, (176), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:38:51,340 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 443 transitions. [2024-11-23 22:38:51,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2024-11-23 22:38:51,342 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:38:51,342 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:38:51,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-23 22:38:51,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-23 22:38:51,544 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:38:51,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:38:51,545 INFO L85 PathProgramCache]: Analyzing trace with hash -20049577, now seen corresponding path program 1 times [2024-11-23 22:38:51,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:38:51,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471271075] [2024-11-23 22:38:51,545 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:38:51,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:38:52,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:38:55,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 0 proven. 534 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2024-11-23 22:38:55,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:38:55,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471271075] [2024-11-23 22:38:55,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471271075] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:38:55,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906720835] [2024-11-23 22:38:55,332 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:38:55,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:38:55,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:38:55,334 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:38:55,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-23 22:38:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:38:56,486 INFO L256 TraceCheckSpWp]: Trace formula consists of 2036 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-23 22:38:56,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:38:56,497 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 11 [2024-11-23 22:38:56,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-23 22:38:56,593 INFO L349 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2024-11-23 22:38:56,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-23 22:38:56,620 INFO L349 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2024-11-23 22:38:56,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-23 22:38:57,691 INFO L349 Elim1Store]: treesize reduction 27, result has 28.9 percent of original size [2024-11-23 22:38:57,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2024-11-23 22:38:57,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:38:57,702 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 31 treesize of output 15 [2024-11-23 22:38:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 0 proven. 534 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2024-11-23 22:38:58,511 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:39:00,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 0 proven. 534 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2024-11-23 22:39:00,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906720835] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:39:00,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:39:00,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 28 [2024-11-23 22:39:00,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383606814] [2024-11-23 22:39:00,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:39:00,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-23 22:39:00,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:39:00,430 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-23 22:39:00,430 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2024-11-23 22:39:00,430 INFO L87 Difference]: Start difference. First operand 428 states and 443 transitions. Second operand has 28 states, 28 states have (on average 5.607142857142857) internal successors, (157), 28 states have internal predecessors, (157), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:39:01,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:39:01,147 INFO L93 Difference]: Finished difference Result 604 states and 622 transitions. [2024-11-23 22:39:01,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-23 22:39:01,147 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.607142857142857) internal successors, (157), 28 states have internal predecessors, (157), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2024-11-23 22:39:01,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:39:01,149 INFO L225 Difference]: With dead ends: 604 [2024-11-23 22:39:01,149 INFO L226 Difference]: Without dead ends: 604 [2024-11-23 22:39:01,149 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=245, Invalid=1087, Unknown=0, NotChecked=0, Total=1332 [2024-11-23 22:39:01,150 INFO L435 NwaCegarLoop]: 93 mSDtfsCounter, 361 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-23 22:39:01,150 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 1038 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-23 22:39:01,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2024-11-23 22:39:01,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 433. [2024-11-23 22:39:01,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 426 states have (on average 1.0492957746478873) internal successors, (447), 430 states have internal predecessors, (447), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:39:01,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 449 transitions. [2024-11-23 22:39:01,160 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 449 transitions. Word has length 197 [2024-11-23 22:39:01,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:39:01,160 INFO L471 AbstractCegarLoop]: Abstraction has 433 states and 449 transitions. [2024-11-23 22:39:01,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.607142857142857) internal successors, (157), 28 states have internal predecessors, (157), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:39:01,161 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 449 transitions. [2024-11-23 22:39:01,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2024-11-23 22:39:01,162 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:39:01,162 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:39:01,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-23 22:39:01,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-23 22:39:01,365 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr58ASSERT_VIOLATIONUNSUPPORTED_FEATURE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:39:01,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:39:01,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1270113136, now seen corresponding path program 2 times [2024-11-23 22:39:01,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:39:01,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563837836] [2024-11-23 22:39:01,366 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:39:01,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:39:01,750 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 22:39:01,754 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:39:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2024-11-23 22:39:02,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:39:02,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563837836] [2024-11-23 22:39:02,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563837836] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:39:02,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120407241] [2024-11-23 22:39:02,634 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:39:02,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:39:02,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:39:02,637 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:39:02,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-23 22:39:03,789 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 22:39:03,789 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:39:03,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 2027 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-23 22:39:03,801 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:39:03,915 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2024-11-23 22:39:03,915 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:39:04,557 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2024-11-23 22:39:04,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120407241] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:39:04,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:39:04,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2024-11-23 22:39:04,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271820817] [2024-11-23 22:39:04,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:39:04,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-23 22:39:04,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:39:04,560 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-23 22:39:04,560 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2024-11-23 22:39:04,562 INFO L87 Difference]: Start difference. First operand 433 states and 449 transitions. Second operand has 37 states, 37 states have (on average 5.027027027027027) internal successors, (186), 37 states have internal predecessors, (186), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:39:04,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:39:04,763 INFO L93 Difference]: Finished difference Result 505 states and 521 transitions. [2024-11-23 22:39:04,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-23 22:39:04,763 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.027027027027027) internal successors, (186), 37 states have internal predecessors, (186), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 198 [2024-11-23 22:39:04,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:39:04,765 INFO L225 Difference]: With dead ends: 505 [2024-11-23 22:39:04,765 INFO L226 Difference]: Without dead ends: 505 [2024-11-23 22:39:04,766 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2024-11-23 22:39:04,766 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 6 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-23 22:39:04,766 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 458 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 22:39:04,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2024-11-23 22:39:04,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 505. [2024-11-23 22:39:04,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 498 states have (on average 1.0421686746987953) internal successors, (519), 502 states have internal predecessors, (519), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:39:04,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 521 transitions. [2024-11-23 22:39:04,774 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 521 transitions. Word has length 198 [2024-11-23 22:39:04,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:39:04,774 INFO L471 AbstractCegarLoop]: Abstraction has 505 states and 521 transitions. [2024-11-23 22:39:04,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.027027027027027) internal successors, (186), 37 states have internal predecessors, (186), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:39:04,774 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 521 transitions. [2024-11-23 22:39:04,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2024-11-23 22:39:04,776 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:39:04,777 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 30, 10, 10, 10, 10, 3, 3, 3, 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] [2024-11-23 22:39:04,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-23 22:39:04,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-23 22:39:04,977 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:39:04,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:39:04,978 INFO L85 PathProgramCache]: Analyzing trace with hash 798433807, now seen corresponding path program 3 times [2024-11-23 22:39:04,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:39:04,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554319277] [2024-11-23 22:39:04,978 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 22:39:04,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:39:05,434 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-23 22:39:05,434 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:39:06,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 0 proven. 1599 refuted. 0 times theorem prover too weak. 895 trivial. 0 not checked. [2024-11-23 22:39:06,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:39:06,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554319277] [2024-11-23 22:39:06,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554319277] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:39:06,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535649938] [2024-11-23 22:39:06,626 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 22:39:06,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:39:06,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:39:06,628 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:39:06,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-23 22:39:09,931 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-23 22:39:09,931 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:39:09,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-23 22:39:09,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:39:10,041 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 [2024-11-23 22:39:10,071 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 19 treesize of output 1 [2024-11-23 22:39:10,370 INFO L349 Elim1Store]: treesize reduction 25, result has 45.7 percent of original size [2024-11-23 22:39:10,370 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 20 treesize of output 25 [2024-11-23 22:39:10,405 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-23 22:39:10,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 27 [2024-11-23 22:39:11,875 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 22:39:11,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 55 [2024-11-23 22:39:11,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 0 proven. 1599 refuted. 0 times theorem prover too weak. 895 trivial. 0 not checked. [2024-11-23 22:39:11,918 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:39:12,630 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 18 treesize of output 16 [2024-11-23 22:39:12,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-23 22:39:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 1 proven. 1075 refuted. 0 times theorem prover too weak. 1418 trivial. 0 not checked. [2024-11-23 22:39:12,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535649938] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:39:12,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:39:12,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 29 [2024-11-23 22:39:12,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791952336] [2024-11-23 22:39:12,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:39:12,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-23 22:39:12,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:39:12,827 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-23 22:39:12,827 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2024-11-23 22:39:12,827 INFO L87 Difference]: Start difference. First operand 505 states and 521 transitions. Second operand has 30 states, 29 states have (on average 5.724137931034483) internal successors, (166), 30 states have internal predecessors, (166), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:39:14,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:39:14,109 INFO L93 Difference]: Finished difference Result 824 states and 843 transitions. [2024-11-23 22:39:14,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-23 22:39:14,110 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 5.724137931034483) internal successors, (166), 30 states have internal predecessors, (166), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 249 [2024-11-23 22:39:14,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:39:14,112 INFO L225 Difference]: With dead ends: 824 [2024-11-23 22:39:14,112 INFO L226 Difference]: Without dead ends: 824 [2024-11-23 22:39:14,112 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 480 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=275, Invalid=1131, Unknown=0, NotChecked=0, Total=1406 [2024-11-23 22:39:14,112 INFO L435 NwaCegarLoop]: 120 mSDtfsCounter, 261 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-23 22:39:14,113 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 1253 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-23 22:39:14,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2024-11-23 22:39:14,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 504. [2024-11-23 22:39:14,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 498 states have (on average 1.0401606425702812) internal successors, (518), 501 states have internal predecessors, (518), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:39:14,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 520 transitions. [2024-11-23 22:39:14,119 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 520 transitions. Word has length 249 [2024-11-23 22:39:14,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:39:14,119 INFO L471 AbstractCegarLoop]: Abstraction has 504 states and 520 transitions. [2024-11-23 22:39:14,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 5.724137931034483) internal successors, (166), 30 states have internal predecessors, (166), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:39:14,120 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 520 transitions. [2024-11-23 22:39:14,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2024-11-23 22:39:14,121 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:39:14,121 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 30, 10, 10, 10, 10, 3, 3, 3, 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] [2024-11-23 22:39:14,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-23 22:39:14,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-23 22:39:14,322 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr45ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:39:14,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:39:14,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1018355536, now seen corresponding path program 2 times [2024-11-23 22:39:14,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:39:14,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437502768] [2024-11-23 22:39:14,322 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:39:14,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:39:14,699 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 22:39:14,699 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:39:18,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 0 proven. 1636 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2024-11-23 22:39:18,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:39:18,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437502768] [2024-11-23 22:39:18,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437502768] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:39:18,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871907947] [2024-11-23 22:39:18,113 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:39:18,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:39:18,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:39:18,119 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:39:18,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-23 22:39:19,159 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 22:39:19,159 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:39:19,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 2382 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-23 22:39:19,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:39:19,401 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 [2024-11-23 22:39:19,404 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 [2024-11-23 22:39:20,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:39:20,202 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 24 treesize of output 19 [2024-11-23 22:39:20,208 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-23 22:39:20,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-23 22:39:20,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:39:20,251 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 35 treesize of output 19 [2024-11-23 22:39:20,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:39:20,256 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 42 treesize of output 22 [2024-11-23 22:39:20,735 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 23 treesize of output 15 [2024-11-23 22:39:20,738 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 26 treesize of output 14 [2024-11-23 22:39:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 216 proven. 1618 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2024-11-23 22:39:20,772 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:39:21,766 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 22:39:21,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 142 [2024-11-23 22:39:21,800 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 22:39:21,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 139 [2024-11-23 22:39:25,389 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 92 treesize of output 88 [2024-11-23 22:39:25,398 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 88 treesize of output 86 [2024-11-23 22:39:25,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 192 [2024-11-23 22:39:25,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 184 [2024-11-23 22:39:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 198 proven. 1636 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2024-11-23 22:39:25,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871907947] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:39:25,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:39:25,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 23, 22] total 53 [2024-11-23 22:39:25,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253539987] [2024-11-23 22:39:25,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:39:25,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-23 22:39:25,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:39:25,640 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-23 22:39:25,641 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=2420, Unknown=0, NotChecked=0, Total=2862 [2024-11-23 22:39:25,642 INFO L87 Difference]: Start difference. First operand 504 states and 520 transitions. Second operand has 54 states, 53 states have (on average 5.415094339622642) internal successors, (287), 54 states have internal predecessors, (287), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:39:29,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:39:29,509 INFO L93 Difference]: Finished difference Result 662 states and 679 transitions. [2024-11-23 22:39:29,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-23 22:39:29,510 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 5.415094339622642) internal successors, (287), 54 states have internal predecessors, (287), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 250 [2024-11-23 22:39:29,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:39:29,511 INFO L225 Difference]: With dead ends: 662 [2024-11-23 22:39:29,511 INFO L226 Difference]: Without dead ends: 662 [2024-11-23 22:39:29,513 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1660 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1280, Invalid=5040, Unknown=0, NotChecked=0, Total=6320 [2024-11-23 22:39:29,513 INFO L435 NwaCegarLoop]: 93 mSDtfsCounter, 251 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 1632 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-23 22:39:29,514 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 1438 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1632 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-23 22:39:29,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2024-11-23 22:39:29,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 503. [2024-11-23 22:39:29,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 498 states have (on average 1.038152610441767) internal successors, (517), 500 states have internal predecessors, (517), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:39:29,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 519 transitions. [2024-11-23 22:39:29,522 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 519 transitions. Word has length 250 [2024-11-23 22:39:29,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:39:29,522 INFO L471 AbstractCegarLoop]: Abstraction has 503 states and 519 transitions. [2024-11-23 22:39:29,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 5.415094339622642) internal successors, (287), 54 states have internal predecessors, (287), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:39:29,523 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 519 transitions. [2024-11-23 22:39:29,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2024-11-23 22:39:29,524 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:39:29,525 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 30, 10, 10, 10, 10, 3, 3, 3, 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, 1, 1] [2024-11-23 22:39:29,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-23 22:39:29,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:39:29,725 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:39:29,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:39:29,726 INFO L85 PathProgramCache]: Analyzing trace with hash 470465500, now seen corresponding path program 2 times [2024-11-23 22:39:29,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:39:29,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912109056] [2024-11-23 22:39:29,726 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:39:29,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:39:30,032 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 22:39:30,032 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:39:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 1 proven. 1598 refuted. 0 times theorem prover too weak. 895 trivial. 0 not checked. [2024-11-23 22:39:32,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:39:32,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912109056] [2024-11-23 22:39:32,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912109056] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:39:32,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44830502] [2024-11-23 22:39:32,198 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:39:32,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:39:32,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:39:32,200 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:39:32,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-23 22:39:33,480 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 22:39:33,480 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:39:33,495 INFO L256 TraceCheckSpWp]: Trace formula consists of 2410 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-23 22:39:33,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:39:33,596 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-23 22:39:33,596 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 19 treesize of output 18 [2024-11-23 22:39:33,614 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 22:39:33,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-23 22:39:33,650 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 23 treesize of output 1 [2024-11-23 22:39:34,518 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-23 22:39:34,518 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 19 treesize of output 18 [2024-11-23 22:39:34,543 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 22:39:34,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-23 22:39:34,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:39:34,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2024-11-23 22:39:36,117 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-23 22:39:36,118 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 19 treesize of output 18 [2024-11-23 22:39:36,131 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 22:39:36,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-23 22:39:36,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:39:36,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:39:36,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:39:36,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 31 [2024-11-23 22:39:36,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:39:36,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:39:36,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:39:36,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2024-11-23 22:39:36,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 534 proven. 1065 refuted. 0 times theorem prover too weak. 895 trivial. 0 not checked. [2024-11-23 22:39:36,729 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:39:38,440 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-23 22:39:38,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-23 22:39:39,392 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-23 22:39:39,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-23 22:39:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 538 proven. 1061 refuted. 0 times theorem prover too weak. 895 trivial. 0 not checked. [2024-11-23 22:39:39,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44830502] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:39:39,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:39:39,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 12] total 40 [2024-11-23 22:39:39,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751493958] [2024-11-23 22:39:39,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:39:39,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-23 22:39:39,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:39:39,603 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-23 22:39:39,603 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640 [2024-11-23 22:39:39,604 INFO L87 Difference]: Start difference. First operand 503 states and 519 transitions. Second operand has 41 states, 40 states have (on average 5.65) internal successors, (226), 41 states have internal predecessors, (226), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:39:41,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:39:41,122 INFO L93 Difference]: Finished difference Result 667 states and 686 transitions. [2024-11-23 22:39:41,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-23 22:39:41,123 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 5.65) internal successors, (226), 41 states have internal predecessors, (226), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 259 [2024-11-23 22:39:41,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:39:41,124 INFO L225 Difference]: With dead ends: 667 [2024-11-23 22:39:41,124 INFO L226 Difference]: Without dead ends: 667 [2024-11-23 22:39:41,125 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 491 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=537, Invalid=2655, Unknown=0, NotChecked=0, Total=3192 [2024-11-23 22:39:41,125 INFO L435 NwaCegarLoop]: 95 mSDtfsCounter, 521 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-23 22:39:41,125 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 1100 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-23 22:39:41,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2024-11-23 22:39:41,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 497. [2024-11-23 22:39:41,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 493 states have (on average 1.0344827586206897) internal successors, (510), 494 states have internal predecessors, (510), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:39:41,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 512 transitions. [2024-11-23 22:39:41,132 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 512 transitions. Word has length 259 [2024-11-23 22:39:41,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:39:41,132 INFO L471 AbstractCegarLoop]: Abstraction has 497 states and 512 transitions. [2024-11-23 22:39:41,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 5.65) internal successors, (226), 41 states have internal predecessors, (226), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 22:39:41,132 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 512 transitions. [2024-11-23 22:39:41,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2024-11-23 22:39:41,134 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:39:41,134 INFO L218 NwaCegarLoop]: trace histogram [34, 34, 34, 34, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:39:41,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-23 22:39:41,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:39:41,335 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr58ASSERT_VIOLATIONUNSUPPORTED_FEATURE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-11-23 22:39:41,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:39:41,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1332697682, now seen corresponding path program 3 times [2024-11-23 22:39:41,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:39:41,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542115418] [2024-11-23 22:39:41,335 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 22:39:41,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:39:47,083 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2024-11-23 22:39:47,083 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:39:48,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2024-11-23 22:39:48,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:39:48,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542115418] [2024-11-23 22:39:48,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542115418] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:39:48,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469893723] [2024-11-23 22:39:48,879 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 22:39:48,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:39:48,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:39:48,881 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:39:48,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d89ecbe7-c85a-4fe4-9d9f-96b2eb815063/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process