./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/sll-shared-sll-before.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/sll-shared-sll-before.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 3d5c47b12a731095d5a51b5ad7e19fee7b2131bbe4b3910b3108642fe52c085d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:15:17,359 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:15:17,450 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2024-11-28 03:15:17,457 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:15:17,457 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:15:17,487 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:15:17,488 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:15:17,488 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:15:17,488 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:15:17,488 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:15:17,489 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:15:17,489 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:15:17,489 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:15:17,489 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:15:17,489 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:15:17,490 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:15:17,490 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:15:17,490 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:15:17,490 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 03:15:17,490 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 03:15:17,490 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 03:15:17,491 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:15:17,491 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 03:15:17,491 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 03:15:17,491 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:15:17,491 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:15:17,491 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:15:17,491 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:15:17,492 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:15:17,492 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:15:17,492 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:15:17,492 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:15:17,492 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:15:17,492 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:15:17,492 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:15:17,492 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:15:17,493 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:15:17,493 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:15:17,493 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:15:17,493 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:15:17,493 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:15:17,493 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:15:17,493 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:15:17,493 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:15:17,494 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_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d5c47b12a731095d5a51b5ad7e19fee7b2131bbe4b3910b3108642fe52c085d [2024-11-28 03:15:17,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:15:17,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:15:17,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:15:17,957 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:15:17,957 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:15:17,959 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/memsafety-broom/sll-shared-sll-before.i [2024-11-28 03:15:21,093 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/data/b0b0db660/0766c638597d4cc4bb01c88e8a7e8f69/FLAGcce6876c2 [2024-11-28 03:15:21,558 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:15:21,559 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/sv-benchmarks/c/memsafety-broom/sll-shared-sll-before.i [2024-11-28 03:15:21,601 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/data/b0b0db660/0766c638597d4cc4bb01c88e8a7e8f69/FLAGcce6876c2 [2024-11-28 03:15:21,680 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/data/b0b0db660/0766c638597d4cc4bb01c88e8a7e8f69 [2024-11-28 03:15:21,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:15:21,685 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:15:21,686 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:15:21,687 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:15:21,694 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:15:21,695 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:15:21" (1/1) ... [2024-11-28 03:15:21,696 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40390d6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:21, skipping insertion in model container [2024-11-28 03:15:21,696 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:15:21" (1/1) ... [2024-11-28 03:15:21,755 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:15:22,089 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:15:22,101 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:15:22,165 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:15:22,195 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:15:22,195 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:22 WrapperNode [2024-11-28 03:15:22,196 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:15:22,197 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:15:22,197 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:15:22,197 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:15:22,205 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:22" (1/1) ... [2024-11-28 03:15:22,218 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:22" (1/1) ... [2024-11-28 03:15:22,240 INFO L138 Inliner]: procedures = 120, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 83 [2024-11-28 03:15:22,241 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:15:22,242 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:15:22,242 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:15:22,242 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:15:22,253 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:22" (1/1) ... [2024-11-28 03:15:22,253 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:22" (1/1) ... [2024-11-28 03:15:22,257 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:22" (1/1) ... [2024-11-28 03:15:22,277 INFO L175 MemorySlicer]: Split 12 memory accesses to 1 slices as follows [12]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 7 writes are split as follows [7]. [2024-11-28 03:15:22,278 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:22" (1/1) ... [2024-11-28 03:15:22,278 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:22" (1/1) ... [2024-11-28 03:15:22,286 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:22" (1/1) ... [2024-11-28 03:15:22,287 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:22" (1/1) ... [2024-11-28 03:15:22,291 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:22" (1/1) ... [2024-11-28 03:15:22,292 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:22" (1/1) ... [2024-11-28 03:15:22,293 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:22" (1/1) ... [2024-11-28 03:15:22,296 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:15:22,297 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:15:22,297 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:15:22,297 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:15:22,299 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:22" (1/1) ... [2024-11-28 03:15:22,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:15:22,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:22,341 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:15:22,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:15:22,375 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero_internal [2024-11-28 03:15:22,376 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero_internal [2024-11-28 03:15:22,376 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2024-11-28 03:15:22,376 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2024-11-28 03:15:22,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 03:15:22,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-28 03:15:22,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-28 03:15:22,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 03:15:22,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:15:22,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:15:22,510 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:15:22,513 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:15:22,928 INFO L? ?]: Removed 84 outVars from TransFormulas that were not future-live. [2024-11-28 03:15:22,928 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:15:22,952 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:15:22,953 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 03:15:22,953 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:15:22 BoogieIcfgContainer [2024-11-28 03:15:22,953 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:15:22,960 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:15:22,960 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:15:22,967 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:15:22,967 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:15:21" (1/3) ... [2024-11-28 03:15:22,968 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@316f4a66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:15:22, skipping insertion in model container [2024-11-28 03:15:22,968 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:22" (2/3) ... [2024-11-28 03:15:22,968 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@316f4a66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:15:22, skipping insertion in model container [2024-11-28 03:15:22,968 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:15:22" (3/3) ... [2024-11-28 03:15:22,971 INFO L128 eAbstractionObserver]: Analyzing ICFG sll-shared-sll-before.i [2024-11-28 03:15:22,989 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:15:22,990 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sll-shared-sll-before.i that has 3 procedures, 87 locations, 1 initial locations, 4 loop locations, and 31 error locations. [2024-11-28 03:15:23,042 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:15:23,057 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;@4e67a961, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:15:23,057 INFO L334 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2024-11-28 03:15:23,062 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 80 states have internal predecessors, (88), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 03:15:23,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-28 03:15:23,069 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:23,070 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-28 03:15:23,071 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zero_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:15:23,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:23,077 INFO L85 PathProgramCache]: Analyzing trace with hash 37399427, now seen corresponding path program 1 times [2024-11-28 03:15:23,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:23,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508812569] [2024-11-28 03:15:23,088 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:23,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:23,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:23,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:23,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508812569] [2024-11-28 03:15:23,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508812569] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:15:23,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:15:23,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:15:23,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446599732] [2024-11-28 03:15:23,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:15:23,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:15:23,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:23,472 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:15:23,473 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:15:23,476 INFO L87 Difference]: Start difference. First operand has 87 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 80 states have internal predecessors, (88), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:15:23,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:23,618 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2024-11-28 03:15:23,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:15:23,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-28 03:15:23,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:23,632 INFO L225 Difference]: With dead ends: 86 [2024-11-28 03:15:23,633 INFO L226 Difference]: Without dead ends: 84 [2024-11-28 03:15:23,636 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:15:23,642 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 1 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:23,643 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 144 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:15:23,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-28 03:15:23,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-11-28 03:15:23,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 48 states have (on average 1.6875) internal successors, (81), 77 states have internal predecessors, (81), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 03:15:23,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2024-11-28 03:15:23,705 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 5 [2024-11-28 03:15:23,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:23,705 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2024-11-28 03:15:23,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:15:23,706 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2024-11-28 03:15:23,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-28 03:15:23,706 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:23,706 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-28 03:15:23,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 03:15:23,707 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zero_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:15:23,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:23,708 INFO L85 PathProgramCache]: Analyzing trace with hash 37399428, now seen corresponding path program 1 times [2024-11-28 03:15:23,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:23,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282888097] [2024-11-28 03:15:23,711 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:23,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:23,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:23,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:23,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282888097] [2024-11-28 03:15:23,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282888097] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:15:23,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:15:23,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:15:23,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572253326] [2024-11-28 03:15:23,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:15:23,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:15:23,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:23,874 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:15:23,875 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:15:23,876 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:15:23,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:23,957 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2024-11-28 03:15:23,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:15:23,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-28 03:15:23,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:23,959 INFO L225 Difference]: With dead ends: 83 [2024-11-28 03:15:23,959 INFO L226 Difference]: Without dead ends: 83 [2024-11-28 03:15:23,960 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:15:23,961 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 1 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:23,961 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 148 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:15:23,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-28 03:15:23,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2024-11-28 03:15:23,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 76 states have internal predecessors, (80), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 03:15:23,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2024-11-28 03:15:23,969 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 5 [2024-11-28 03:15:23,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:23,969 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2024-11-28 03:15:23,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:15:23,970 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2024-11-28 03:15:23,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-28 03:15:23,970 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:23,971 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:15:23,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 03:15:23,971 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:15:23,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:23,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1573530296, now seen corresponding path program 1 times [2024-11-28 03:15:23,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:23,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573873908] [2024-11-28 03:15:23,972 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:23,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:24,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:24,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573873908] [2024-11-28 03:15:24,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573873908] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:15:24,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:15:24,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:15:24,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277802775] [2024-11-28 03:15:24,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:15:24,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:15:24,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:24,133 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:15:24,134 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:15:24,134 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 03:15:24,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:24,213 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2024-11-28 03:15:24,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:15:24,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-11-28 03:15:24,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:24,215 INFO L225 Difference]: With dead ends: 81 [2024-11-28 03:15:24,215 INFO L226 Difference]: Without dead ends: 81 [2024-11-28 03:15:24,216 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:15:24,216 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 2 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:24,217 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 134 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:15:24,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-28 03:15:24,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-11-28 03:15:24,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 48 states have (on average 1.625) internal successors, (78), 74 states have internal predecessors, (78), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 03:15:24,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2024-11-28 03:15:24,225 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 16 [2024-11-28 03:15:24,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:24,226 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2024-11-28 03:15:24,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 03:15:24,227 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2024-11-28 03:15:24,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-28 03:15:24,227 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:24,228 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:15:24,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 03:15:24,228 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:15:24,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:24,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1573530297, now seen corresponding path program 1 times [2024-11-28 03:15:24,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:24,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066474200] [2024-11-28 03:15:24,229 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:24,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:24,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:24,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066474200] [2024-11-28 03:15:24,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066474200] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:15:24,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:15:24,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:15:24,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816849648] [2024-11-28 03:15:24,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:15:24,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:15:24,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:24,365 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:15:24,365 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:15:24,365 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 03:15:24,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:24,449 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2024-11-28 03:15:24,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:15:24,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-11-28 03:15:24,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:24,451 INFO L225 Difference]: With dead ends: 79 [2024-11-28 03:15:24,451 INFO L226 Difference]: Without dead ends: 79 [2024-11-28 03:15:24,451 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:15:24,453 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 2 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:24,453 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 141 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:15:24,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-28 03:15:24,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2024-11-28 03:15:24,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 72 states have internal predecessors, (76), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 03:15:24,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2024-11-28 03:15:24,461 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 16 [2024-11-28 03:15:24,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:24,461 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2024-11-28 03:15:24,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 03:15:24,461 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2024-11-28 03:15:24,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 03:15:24,462 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:24,462 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:15:24,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 03:15:24,463 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:15:24,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:24,464 INFO L85 PathProgramCache]: Analyzing trace with hash 439575021, now seen corresponding path program 1 times [2024-11-28 03:15:24,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:24,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675758152] [2024-11-28 03:15:24,464 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:24,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:24,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:24,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675758152] [2024-11-28 03:15:24,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675758152] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:24,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149374482] [2024-11-28 03:15:24,844 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:24,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:24,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:24,847 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:15:24,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:15:24,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:24,941 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 03:15:24,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:15:24,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 03:15:25,043 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1))) is different from true [2024-11-28 03:15:25,089 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-28 03:15:25,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-28 03:15:25,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-28 03:15:25,110 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:15:25,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:25,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149374482] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:15:25,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:15:25,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 11 [2024-11-28 03:15:25,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155420158] [2024-11-28 03:15:25,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:15:25,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:15:25,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:25,386 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:15:25,387 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=84, Unknown=1, NotChecked=18, Total=132 [2024-11-28 03:15:25,388 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:15:25,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:25,930 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2024-11-28 03:15:25,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:15:25,931 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 18 [2024-11-28 03:15:25,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:25,933 INFO L225 Difference]: With dead ends: 84 [2024-11-28 03:15:25,936 INFO L226 Difference]: Without dead ends: 84 [2024-11-28 03:15:25,937 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=101, Unknown=1, NotChecked=20, Total=156 [2024-11-28 03:15:25,938 INFO L435 NwaCegarLoop]: 71 mSDtfsCounter, 8 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:25,938 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 450 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 334 Invalid, 0 Unknown, 88 Unchecked, 0.4s Time] [2024-11-28 03:15:25,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-28 03:15:25,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2024-11-28 03:15:25,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 74 states have internal predecessors, (80), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 03:15:25,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2024-11-28 03:15:25,954 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 18 [2024-11-28 03:15:25,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:25,958 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2024-11-28 03:15:25,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:15:25,959 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2024-11-28 03:15:25,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 03:15:25,960 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:25,960 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:15:25,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 03:15:26,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:26,161 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:15:26,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:26,164 INFO L85 PathProgramCache]: Analyzing trace with hash 439575022, now seen corresponding path program 1 times [2024-11-28 03:15:26,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:26,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170923908] [2024-11-28 03:15:26,164 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:26,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:26,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:26,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170923908] [2024-11-28 03:15:26,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170923908] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:26,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267947715] [2024-11-28 03:15:26,873 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:26,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:26,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:26,877 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:15:26,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:15:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:26,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-28 03:15:26,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:15:27,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 03:15:27,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 03:15:27,324 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2024-11-28 03:15:27,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:15:27,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-28 03:15:27,407 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 03:15:27,408 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 [2024-11-28 03:15:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-28 03:15:27,415 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:15:27,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267947715] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:27,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:15:27,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2024-11-28 03:15:27,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23728760] [2024-11-28 03:15:27,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:15:27,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 03:15:27,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:27,620 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 03:15:27,621 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=201, Unknown=1, NotChecked=28, Total=272 [2024-11-28 03:15:27,621 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 11 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 03:15:28,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:28,070 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2024-11-28 03:15:28,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:15:28,070 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 11 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 18 [2024-11-28 03:15:28,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:28,071 INFO L225 Difference]: With dead ends: 86 [2024-11-28 03:15:28,072 INFO L226 Difference]: Without dead ends: 86 [2024-11-28 03:15:28,072 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=256, Unknown=1, NotChecked=32, Total=342 [2024-11-28 03:15:28,074 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 11 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:28,074 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 450 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 281 Invalid, 0 Unknown, 89 Unchecked, 0.3s Time] [2024-11-28 03:15:28,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-28 03:15:28,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2024-11-28 03:15:28,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 53 states have (on average 1.528301886792453) internal successors, (81), 76 states have internal predecessors, (81), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 03:15:28,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2024-11-28 03:15:28,086 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 18 [2024-11-28 03:15:28,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:28,087 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2024-11-28 03:15:28,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 11 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 03:15:28,088 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2024-11-28 03:15:28,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 03:15:28,089 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:28,089 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:15:28,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 03:15:28,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:28,290 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:15:28,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:28,292 INFO L85 PathProgramCache]: Analyzing trace with hash -70076739, now seen corresponding path program 1 times [2024-11-28 03:15:28,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:28,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138955154] [2024-11-28 03:15:28,292 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:28,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:28,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:28,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:28,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138955154] [2024-11-28 03:15:28,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138955154] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:15:28,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:15:28,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:15:28,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578561913] [2024-11-28 03:15:28,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:15:28,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:15:28,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:28,419 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:15:28,420 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:15:28,421 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 03:15:28,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:28,592 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2024-11-28 03:15:28,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:15:28,594 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2024-11-28 03:15:28,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:28,596 INFO L225 Difference]: With dead ends: 86 [2024-11-28 03:15:28,596 INFO L226 Difference]: Without dead ends: 86 [2024-11-28 03:15:28,596 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:15:28,599 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 11 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:28,600 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 242 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:15:28,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-28 03:15:28,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2024-11-28 03:15:28,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 53 states have (on average 1.471698113207547) internal successors, (78), 73 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 03:15:28,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2024-11-28 03:15:28,614 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 22 [2024-11-28 03:15:28,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:28,614 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2024-11-28 03:15:28,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 03:15:28,614 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2024-11-28 03:15:28,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 03:15:28,615 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:28,615 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:15:28,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 03:15:28,615 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:15:28,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:28,616 INFO L85 PathProgramCache]: Analyzing trace with hash -70076738, now seen corresponding path program 1 times [2024-11-28 03:15:28,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:28,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155048039] [2024-11-28 03:15:28,617 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:28,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:28,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:28,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155048039] [2024-11-28 03:15:28,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155048039] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:15:28,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:15:28,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:15:28,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45791192] [2024-11-28 03:15:28,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:15:28,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:15:28,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:28,866 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:15:28,866 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:15:28,866 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 03:15:28,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:28,997 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2024-11-28 03:15:28,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:15:28,998 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2024-11-28 03:15:28,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:28,999 INFO L225 Difference]: With dead ends: 85 [2024-11-28 03:15:28,999 INFO L226 Difference]: Without dead ends: 85 [2024-11-28 03:15:28,999 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:15:29,000 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 6 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:29,001 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 296 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:15:29,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-28 03:15:29,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2024-11-28 03:15:29,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 72 states have internal predecessors, (77), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 03:15:29,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2024-11-28 03:15:29,014 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 22 [2024-11-28 03:15:29,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:29,014 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2024-11-28 03:15:29,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 03:15:29,014 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2024-11-28 03:15:29,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-28 03:15:29,015 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:29,015 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:15:29,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 03:15:29,016 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:15:29,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:29,016 INFO L85 PathProgramCache]: Analyzing trace with hash 817403880, now seen corresponding path program 1 times [2024-11-28 03:15:29,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:29,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854118071] [2024-11-28 03:15:29,016 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:29,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:29,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:29,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:29,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854118071] [2024-11-28 03:15:29,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854118071] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:15:29,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:15:29,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-28 03:15:29,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112891971] [2024-11-28 03:15:29,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:15:29,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 03:15:29,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:29,493 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 03:15:29,493 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-28 03:15:29,494 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 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) [2024-11-28 03:15:29,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:29,995 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2024-11-28 03:15:29,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:15:29,996 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 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 28 [2024-11-28 03:15:29,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:29,999 INFO L225 Difference]: With dead ends: 81 [2024-11-28 03:15:29,999 INFO L226 Difference]: Without dead ends: 81 [2024-11-28 03:15:29,999 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:15:30,001 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 30 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:30,002 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 402 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 03:15:30,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-28 03:15:30,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-11-28 03:15:30,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 55 states have (on average 1.4545454545454546) internal successors, (80), 73 states have internal predecessors, (80), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 03:15:30,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2024-11-28 03:15:30,014 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 28 [2024-11-28 03:15:30,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:30,015 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2024-11-28 03:15:30,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 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) [2024-11-28 03:15:30,015 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2024-11-28 03:15:30,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-28 03:15:30,016 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:30,016 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:15:30,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 03:15:30,017 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:15:30,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:30,017 INFO L85 PathProgramCache]: Analyzing trace with hash 817403881, now seen corresponding path program 1 times [2024-11-28 03:15:30,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:30,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963357779] [2024-11-28 03:15:30,017 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:30,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:30,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:30,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:30,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963357779] [2024-11-28 03:15:30,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963357779] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:15:30,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:15:30,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-28 03:15:30,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994130442] [2024-11-28 03:15:30,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:15:30,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:15:30,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:30,637 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:15:30,637 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:15:30,637 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 14 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 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) [2024-11-28 03:15:31,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:31,130 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2024-11-28 03:15:31,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 03:15:31,131 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 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 28 [2024-11-28 03:15:31,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:31,132 INFO L225 Difference]: With dead ends: 95 [2024-11-28 03:15:31,132 INFO L226 Difference]: Without dead ends: 95 [2024-11-28 03:15:31,132 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:15:31,133 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 7 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:31,133 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 386 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 03:15:31,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-28 03:15:31,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2024-11-28 03:15:31,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 67 states have (on average 1.4029850746268657) internal successors, (94), 85 states have internal predecessors, (94), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 03:15:31,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 106 transitions. [2024-11-28 03:15:31,147 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 106 transitions. Word has length 28 [2024-11-28 03:15:31,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:31,147 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 106 transitions. [2024-11-28 03:15:31,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 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) [2024-11-28 03:15:31,148 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 106 transitions. [2024-11-28 03:15:31,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-28 03:15:31,148 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:31,149 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:15:31,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-28 03:15:31,149 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:15:31,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:31,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1352951227, now seen corresponding path program 1 times [2024-11-28 03:15:31,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:31,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042606385] [2024-11-28 03:15:31,150 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:31,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:15:31,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:31,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042606385] [2024-11-28 03:15:31,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042606385] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:31,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187890641] [2024-11-28 03:15:31,474 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:31,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:31,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:31,476 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:15:31,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:15:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:31,594 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 03:15:31,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:15:31,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 03:15:31,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 03:15:31,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-28 03:15:31,671 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1))) is different from true [2024-11-28 03:15:31,699 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-28 03:15:31,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-28 03:15:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2024-11-28 03:15:31,719 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:15:31,916 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:15:31,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187890641] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:15:31,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:15:31,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 13 [2024-11-28 03:15:31,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873559894] [2024-11-28 03:15:31,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:15:31,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:15:31,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:31,918 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:15:31,919 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=126, Unknown=1, NotChecked=22, Total=182 [2024-11-28 03:15:31,919 INFO L87 Difference]: Start difference. First operand 94 states and 106 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 03:15:32,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:32,261 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2024-11-28 03:15:32,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:15:32,261 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 30 [2024-11-28 03:15:32,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:32,263 INFO L225 Difference]: With dead ends: 93 [2024-11-28 03:15:32,263 INFO L226 Difference]: Without dead ends: 93 [2024-11-28 03:15:32,263 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=197, Unknown=1, NotChecked=28, Total=272 [2024-11-28 03:15:32,264 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 12 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:32,264 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 443 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 288 Invalid, 0 Unknown, 81 Unchecked, 0.3s Time] [2024-11-28 03:15:32,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-28 03:15:32,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2024-11-28 03:15:32,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 67 states have (on average 1.3880597014925373) internal successors, (93), 84 states have internal predecessors, (93), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 03:15:32,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2024-11-28 03:15:32,269 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 30 [2024-11-28 03:15:32,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:32,269 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2024-11-28 03:15:32,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 03:15:32,270 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2024-11-28 03:15:32,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-28 03:15:32,275 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:32,275 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:15:32,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 03:15:32,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:32,479 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:15:32,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:32,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1352951226, now seen corresponding path program 1 times [2024-11-28 03:15:32,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:32,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286545381] [2024-11-28 03:15:32,480 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:32,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:32,989 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:15:32,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:32,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286545381] [2024-11-28 03:15:32,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286545381] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:32,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304089898] [2024-11-28 03:15:32,989 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:32,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:32,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:32,992 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:15:32,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:15:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:33,090 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 03:15:33,093 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:15:33,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 03:15:33,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 03:15:33,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:15:33,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 03:15:33,198 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 [2024-11-28 03:15:33,251 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2024-11-28 03:15:33,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:15:33,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-28 03:15:33,297 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 03:15:33,298 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 [2024-11-28 03:15:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2024-11-28 03:15:33,304 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:15:33,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304089898] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:33,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:15:33,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2024-11-28 03:15:33,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496644043] [2024-11-28 03:15:33,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:15:33,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:15:33,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:33,442 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:15:33,442 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=177, Unknown=1, NotChecked=26, Total=240 [2024-11-28 03:15:33,443 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:15:33,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:33,911 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2024-11-28 03:15:33,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:15:33,912 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2024-11-28 03:15:33,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:33,913 INFO L225 Difference]: With dead ends: 91 [2024-11-28 03:15:33,913 INFO L226 Difference]: Without dead ends: 91 [2024-11-28 03:15:33,914 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=287, Unknown=1, NotChecked=34, Total=380 [2024-11-28 03:15:33,914 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 11 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:33,915 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 396 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 272 Invalid, 0 Unknown, 81 Unchecked, 0.3s Time] [2024-11-28 03:15:33,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-28 03:15:33,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2024-11-28 03:15:33,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.375) internal successors, (88), 79 states have internal predecessors, (88), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 03:15:33,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2024-11-28 03:15:33,924 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 30 [2024-11-28 03:15:33,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:33,924 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2024-11-28 03:15:33,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:15:33,925 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2024-11-28 03:15:33,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-28 03:15:33,925 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:33,925 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:15:33,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 03:15:34,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:34,126 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:15:34,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:34,127 INFO L85 PathProgramCache]: Analyzing trace with hash -453812041, now seen corresponding path program 1 times [2024-11-28 03:15:34,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:34,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659268653] [2024-11-28 03:15:34,127 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:34,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:34,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:34,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:34,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:34,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659268653] [2024-11-28 03:15:34,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659268653] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:15:34,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:15:34,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 03:15:34,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513306637] [2024-11-28 03:15:34,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:15:34,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 03:15:34,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:34,267 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 03:15:34,267 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:15:34,267 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 03:15:34,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:34,358 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2024-11-28 03:15:34,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:15:34,359 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 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 30 [2024-11-28 03:15:34,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:34,360 INFO L225 Difference]: With dead ends: 92 [2024-11-28 03:15:34,360 INFO L226 Difference]: Without dead ends: 92 [2024-11-28 03:15:34,360 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:15:34,361 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 25 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:34,362 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 479 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:15:34,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-28 03:15:34,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2024-11-28 03:15:34,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.34375) internal successors, (86), 79 states have internal predecessors, (86), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 03:15:34,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2024-11-28 03:15:34,370 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 30 [2024-11-28 03:15:34,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:34,371 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2024-11-28 03:15:34,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 03:15:34,371 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2024-11-28 03:15:34,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-28 03:15:34,372 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:34,372 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-28 03:15:34,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 03:15:34,372 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:15:34,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:34,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1668893914, now seen corresponding path program 1 times [2024-11-28 03:15:34,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:34,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600717631] [2024-11-28 03:15:34,373 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:34,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:34,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:34,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:34,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600717631] [2024-11-28 03:15:34,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600717631] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:34,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77210248] [2024-11-28 03:15:34,599 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:34,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:34,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:34,602 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:15:34,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:15:34,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:34,720 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:15:34,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:15:34,751 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2024-11-28 03:15:34,804 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-28 03:15:34,804 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 [2024-11-28 03:15:34,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:34,807 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:15:34,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77210248] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:15:34,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:15:34,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 10 [2024-11-28 03:15:34,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352303168] [2024-11-28 03:15:34,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:15:34,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:15:34,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:34,809 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:15:34,809 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=69, Unknown=1, NotChecked=16, Total=110 [2024-11-28 03:15:34,810 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 03:15:34,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:34,880 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2024-11-28 03:15:34,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:15:34,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2024-11-28 03:15:34,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:34,881 INFO L225 Difference]: With dead ends: 93 [2024-11-28 03:15:34,882 INFO L226 Difference]: Without dead ends: 93 [2024-11-28 03:15:34,882 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=69, Unknown=1, NotChecked=16, Total=110 [2024-11-28 03:15:34,883 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 9 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:34,884 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 139 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 95 Unchecked, 0.1s Time] [2024-11-28 03:15:34,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-28 03:15:34,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2024-11-28 03:15:34,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 67 states have (on average 1.3582089552238805) internal successors, (91), 82 states have internal predecessors, (91), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 03:15:34,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2024-11-28 03:15:34,890 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 32 [2024-11-28 03:15:34,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:34,891 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2024-11-28 03:15:34,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 03:15:34,892 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2024-11-28 03:15:34,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-28 03:15:34,892 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:34,892 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-28 03:15:34,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 03:15:35,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 03:15:35,095 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:15:35,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:35,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1668893913, now seen corresponding path program 1 times [2024-11-28 03:15:35,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:35,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947060288] [2024-11-28 03:15:35,096 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:35,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:35,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:35,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:35,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947060288] [2024-11-28 03:15:35,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947060288] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:35,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115373473] [2024-11-28 03:15:35,471 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:35,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:35,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:35,474 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:15:35,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:15:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:35,594 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 03:15:35,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:15:35,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 03:15:35,756 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2024-11-28 03:15:35,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:15:35,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-28 03:15:35,820 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 03:15:35,820 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 [2024-11-28 03:15:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2024-11-28 03:15:35,828 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:15:35,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115373473] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:35,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:15:35,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-11-28 03:15:35,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770831528] [2024-11-28 03:15:35,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:15:35,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 03:15:35,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:35,973 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 03:15:35,973 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=229, Unknown=1, NotChecked=30, Total=306 [2024-11-28 03:15:35,973 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 03:15:36,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:36,247 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2024-11-28 03:15:36,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:15:36,247 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-11-28 03:15:36,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:36,248 INFO L225 Difference]: With dead ends: 100 [2024-11-28 03:15:36,248 INFO L226 Difference]: Without dead ends: 100 [2024-11-28 03:15:36,249 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=286, Unknown=1, NotChecked=34, Total=380 [2024-11-28 03:15:36,249 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 21 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:36,249 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 375 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 198 Invalid, 0 Unknown, 85 Unchecked, 0.2s Time] [2024-11-28 03:15:36,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-28 03:15:36,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2024-11-28 03:15:36,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 72 states have (on average 1.3472222222222223) internal successors, (97), 87 states have internal predecessors, (97), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 03:15:36,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 109 transitions. [2024-11-28 03:15:36,254 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 109 transitions. Word has length 32 [2024-11-28 03:15:36,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:36,254 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 109 transitions. [2024-11-28 03:15:36,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 03:15:36,254 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 109 transitions. [2024-11-28 03:15:36,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-28 03:15:36,255 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:36,255 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:15:36,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 03:15:36,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 03:15:36,459 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:15:36,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:36,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1185521582, now seen corresponding path program 1 times [2024-11-28 03:15:36,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:36,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921757384] [2024-11-28 03:15:36,460 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:36,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:36,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:36,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:36,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921757384] [2024-11-28 03:15:36,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921757384] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:15:36,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:15:36,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 03:15:36,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918273450] [2024-11-28 03:15:36,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:15:36,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 03:15:36,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:36,603 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 03:15:36,603 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:15:36,603 INFO L87 Difference]: Start difference. First operand 96 states and 109 transitions. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 03:15:36,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:36,768 INFO L93 Difference]: Finished difference Result 100 states and 113 transitions. [2024-11-28 03:15:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:15:36,769 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (2), 1 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 31 [2024-11-28 03:15:36,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:36,770 INFO L225 Difference]: With dead ends: 100 [2024-11-28 03:15:36,770 INFO L226 Difference]: Without dead ends: 100 [2024-11-28 03:15:36,770 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:15:36,771 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 21 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:36,771 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 400 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:15:36,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-28 03:15:36,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2024-11-28 03:15:36,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 75 states have (on average 1.3466666666666667) internal successors, (101), 90 states have internal predecessors, (101), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 03:15:36,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 113 transitions. [2024-11-28 03:15:36,778 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 113 transitions. Word has length 31 [2024-11-28 03:15:36,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:36,779 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 113 transitions. [2024-11-28 03:15:36,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 03:15:36,779 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 113 transitions. [2024-11-28 03:15:36,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 03:15:36,781 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:36,781 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-28 03:15:36,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-28 03:15:36,781 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:15:36,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:36,782 INFO L85 PathProgramCache]: Analyzing trace with hash 522854362, now seen corresponding path program 1 times [2024-11-28 03:15:36,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:36,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514573566] [2024-11-28 03:15:36,782 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:36,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:15:37,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:37,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514573566] [2024-11-28 03:15:37,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514573566] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:15:37,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:15:37,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:15:37,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960482743] [2024-11-28 03:15:37,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:15:37,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:15:37,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:37,058 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:15:37,058 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:15:37,058 INFO L87 Difference]: Start difference. First operand 99 states and 113 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:15:37,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:37,211 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2024-11-28 03:15:37,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:15:37,212 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-11-28 03:15:37,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:37,213 INFO L225 Difference]: With dead ends: 98 [2024-11-28 03:15:37,213 INFO L226 Difference]: Without dead ends: 98 [2024-11-28 03:15:37,213 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:15:37,214 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 4 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:37,214 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 306 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:15:37,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-28 03:15:37,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2024-11-28 03:15:37,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 75 states have (on average 1.32) internal successors, (99), 89 states have internal predecessors, (99), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 03:15:37,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 111 transitions. [2024-11-28 03:15:37,221 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 111 transitions. Word has length 35 [2024-11-28 03:15:37,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:37,221 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 111 transitions. [2024-11-28 03:15:37,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:15:37,222 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 111 transitions. [2024-11-28 03:15:37,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 03:15:37,223 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:37,223 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-28 03:15:37,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-28 03:15:37,223 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:15:37,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:37,224 INFO L85 PathProgramCache]: Analyzing trace with hash 522854361, now seen corresponding path program 1 times [2024-11-28 03:15:37,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:37,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970811920] [2024-11-28 03:15:37,224 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:37,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:37,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:37,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:15:37,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:37,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970811920] [2024-11-28 03:15:37,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970811920] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:15:37,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:15:37,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:15:37,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718059932] [2024-11-28 03:15:37,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:15:37,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:15:37,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:37,384 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:15:37,384 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:15:37,384 INFO L87 Difference]: Start difference. First operand 98 states and 111 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:15:37,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:37,529 INFO L93 Difference]: Finished difference Result 97 states and 109 transitions. [2024-11-28 03:15:37,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:15:37,530 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-11-28 03:15:37,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:37,532 INFO L225 Difference]: With dead ends: 97 [2024-11-28 03:15:37,532 INFO L226 Difference]: Without dead ends: 97 [2024-11-28 03:15:37,532 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:15:37,532 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 3 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:37,533 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 280 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:15:37,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-28 03:15:37,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2024-11-28 03:15:37,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 75 states have (on average 1.2933333333333332) internal successors, (97), 88 states have internal predecessors, (97), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 03:15:37,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2024-11-28 03:15:37,542 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 35 [2024-11-28 03:15:37,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:37,542 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2024-11-28 03:15:37,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:15:37,543 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2024-11-28 03:15:37,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-28 03:15:37,543 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:37,543 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-28 03:15:37,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-28 03:15:37,544 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:15:37,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:37,544 INFO L85 PathProgramCache]: Analyzing trace with hash -357251632, now seen corresponding path program 1 times [2024-11-28 03:15:37,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:37,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239246917] [2024-11-28 03:15:37,544 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:37,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:38,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:38,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239246917] [2024-11-28 03:15:38,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239246917] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:38,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414928137] [2024-11-28 03:15:38,654 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:38,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:38,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:38,657 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:15:38,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:15:38,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:38,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-28 03:15:38,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:15:38,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 03:15:38,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:15:38,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:15:39,398 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 03:15:39,399 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 [2024-11-28 03:15:39,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 03:15:39,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 03:15:39,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 03:15:39,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 03:15:39,733 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:15:39,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-28 03:15:39,745 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:15:39,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-28 03:15:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:39,917 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:15:40,117 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_539 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~now~1#1.base| v_ArrVal_539) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0)) (forall ((v_ArrVal_538 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_~now~1#1.base| v_ArrVal_538) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0))) is different from false [2024-11-28 03:15:40,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414928137] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:40,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:15:40,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 34 [2024-11-28 03:15:40,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675438515] [2024-11-28 03:15:40,462 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:15:40,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 03:15:40,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:40,463 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 03:15:40,464 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1293, Unknown=25, NotChecked=72, Total=1482 [2024-11-28 03:15:40,464 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand has 34 states, 32 states have (on average 1.59375) internal successors, (51), 29 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 03:15:41,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:41,889 INFO L93 Difference]: Finished difference Result 102 states and 116 transitions. [2024-11-28 03:15:41,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 03:15:41,890 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 1.59375) internal successors, (51), 29 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2024-11-28 03:15:41,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:41,891 INFO L225 Difference]: With dead ends: 102 [2024-11-28 03:15:41,891 INFO L226 Difference]: Without dead ends: 102 [2024-11-28 03:15:41,893 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=160, Invalid=2266, Unknown=28, NotChecked=96, Total=2550 [2024-11-28 03:15:41,893 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 18 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:41,894 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1000 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 03:15:41,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-28 03:15:41,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2024-11-28 03:15:41,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.2820512820512822) internal successors, (100), 91 states have internal predecessors, (100), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 03:15:41,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 112 transitions. [2024-11-28 03:15:41,899 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 112 transitions. Word has length 34 [2024-11-28 03:15:41,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:41,900 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 112 transitions. [2024-11-28 03:15:41,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 1.59375) internal successors, (51), 29 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 03:15:41,900 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 112 transitions. [2024-11-28 03:15:41,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 03:15:41,901 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:41,901 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:15:41,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 03:15:42,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:42,105 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:15:42,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:42,106 INFO L85 PathProgramCache]: Analyzing trace with hash 278639775, now seen corresponding path program 1 times [2024-11-28 03:15:42,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:42,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083002843] [2024-11-28 03:15:42,106 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:42,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:42,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:42,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:42,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:42,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083002843] [2024-11-28 03:15:42,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083002843] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:42,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919829389] [2024-11-28 03:15:42,588 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:42,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:42,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:42,590 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:15:42,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:15:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:42,730 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-28 03:15:42,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:15:42,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 03:15:42,801 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 03:15:42,802 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 [2024-11-28 03:15:42,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-28 03:15:42,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:42,926 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:15:43,035 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:15:43,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2024-11-28 03:15:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:43,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919829389] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:15:43,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:15:43,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 27 [2024-11-28 03:15:43,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803432421] [2024-11-28 03:15:43,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:15:43,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 03:15:43,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:43,338 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 03:15:43,339 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=692, Unknown=0, NotChecked=0, Total=756 [2024-11-28 03:15:43,339 INFO L87 Difference]: Start difference. First operand 100 states and 112 transitions. Second operand has 28 states, 25 states have (on average 2.0) internal successors, (50), 22 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 03:15:44,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:44,608 INFO L93 Difference]: Finished difference Result 127 states and 146 transitions. [2024-11-28 03:15:44,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 03:15:44,609 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.0) internal successors, (50), 22 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2024-11-28 03:15:44,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:44,611 INFO L225 Difference]: With dead ends: 127 [2024-11-28 03:15:44,611 INFO L226 Difference]: Without dead ends: 127 [2024-11-28 03:15:44,612 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 03:15:44,612 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 79 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:44,612 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 605 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 03:15:44,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-28 03:15:44,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 114. [2024-11-28 03:15:44,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 93 states have (on average 1.2903225806451613) internal successors, (120), 105 states have internal predecessors, (120), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 03:15:44,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions. [2024-11-28 03:15:44,623 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 36 [2024-11-28 03:15:44,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:44,623 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 132 transitions. [2024-11-28 03:15:44,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.0) internal successors, (50), 22 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 03:15:44,624 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions. [2024-11-28 03:15:44,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 03:15:44,624 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:44,624 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:15:44,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 03:15:44,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:44,825 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:15:44,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:44,825 INFO L85 PathProgramCache]: Analyzing trace with hash 278639776, now seen corresponding path program 1 times [2024-11-28 03:15:44,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:44,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680582758] [2024-11-28 03:15:44,825 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:44,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:44,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:15:45,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:45,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680582758] [2024-11-28 03:15:45,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680582758] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:15:45,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:15:45,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 03:15:45,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166294317] [2024-11-28 03:15:45,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:15:45,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:15:45,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:45,071 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:15:45,071 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:15:45,071 INFO L87 Difference]: Start difference. First operand 114 states and 132 transitions. Second operand has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 03:15:45,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:45,284 INFO L93 Difference]: Finished difference Result 141 states and 166 transitions. [2024-11-28 03:15:45,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:15:45,284 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2024-11-28 03:15:45,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:45,286 INFO L225 Difference]: With dead ends: 141 [2024-11-28 03:15:45,286 INFO L226 Difference]: Without dead ends: 141 [2024-11-28 03:15:45,287 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:15:45,287 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 16 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:45,288 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 460 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:15:45,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-11-28 03:15:45,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 137. [2024-11-28 03:15:45,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 116 states have (on average 1.3275862068965518) internal successors, (154), 128 states have internal predecessors, (154), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 03:15:45,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 166 transitions. [2024-11-28 03:15:45,300 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 166 transitions. Word has length 36 [2024-11-28 03:15:45,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:45,301 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 166 transitions. [2024-11-28 03:15:45,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 03:15:45,301 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 166 transitions. [2024-11-28 03:15:45,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-28 03:15:45,301 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:45,301 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:15:45,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-28 03:15:45,302 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:15:45,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:45,302 INFO L85 PathProgramCache]: Analyzing trace with hash 47900850, now seen corresponding path program 1 times [2024-11-28 03:15:45,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:45,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909721007] [2024-11-28 03:15:45,302 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:45,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:45,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:45,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:15:45,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:45,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909721007] [2024-11-28 03:15:45,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909721007] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:15:45,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:15:45,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 03:15:45,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725739058] [2024-11-28 03:15:45,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:15:45,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 03:15:45,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:45,430 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 03:15:45,431 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:15:45,431 INFO L87 Difference]: Start difference. First operand 137 states and 166 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 03:15:45,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:45,517 INFO L93 Difference]: Finished difference Result 144 states and 173 transitions. [2024-11-28 03:15:45,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:15:45,518 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2024-11-28 03:15:45,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:45,519 INFO L225 Difference]: With dead ends: 144 [2024-11-28 03:15:45,520 INFO L226 Difference]: Without dead ends: 144 [2024-11-28 03:15:45,520 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:15:45,522 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 22 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:45,522 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 449 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:15:45,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-28 03:15:45,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 138. [2024-11-28 03:15:45,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 117 states have (on average 1.2991452991452992) internal successors, (152), 129 states have internal predecessors, (152), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 03:15:45,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 164 transitions. [2024-11-28 03:15:45,528 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 164 transitions. Word has length 37 [2024-11-28 03:15:45,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:45,528 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 164 transitions. [2024-11-28 03:15:45,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 03:15:45,529 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 164 transitions. [2024-11-28 03:15:45,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-28 03:15:45,530 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:45,530 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-28 03:15:45,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-28 03:15:45,530 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:15:45,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:45,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1449639359, now seen corresponding path program 1 times [2024-11-28 03:15:45,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:45,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861139103] [2024-11-28 03:15:45,531 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:45,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:15:45,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:45,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861139103] [2024-11-28 03:15:45,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861139103] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:45,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955398864] [2024-11-28 03:15:45,987 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:45,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:45,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:45,991 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:15:45,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:15:46,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:46,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-28 03:15:46,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:15:46,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 03:15:46,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 03:15:46,427 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2024-11-28 03:15:46,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:15:46,466 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 [2024-11-28 03:15:46,488 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 03:15:46,488 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 [2024-11-28 03:15:46,727 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2024-11-28 03:15:46,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:15:46,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-28 03:15:46,778 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 03:15:46,778 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 [2024-11-28 03:15:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-28 03:15:46,819 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:15:47,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955398864] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:47,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:15:47,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2024-11-28 03:15:47,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410566512] [2024-11-28 03:15:47,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:15:47,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 03:15:47,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:47,077 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 03:15:47,078 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=588, Unknown=2, NotChecked=98, Total=756 [2024-11-28 03:15:47,079 INFO L87 Difference]: Start difference. First operand 138 states and 164 transitions. Second operand has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 20 states have internal predecessors, (58), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 03:15:47,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:47,840 INFO L93 Difference]: Finished difference Result 205 states and 243 transitions. [2024-11-28 03:15:47,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 03:15:47,841 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 20 states have internal predecessors, (58), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 40 [2024-11-28 03:15:47,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:47,842 INFO L225 Difference]: With dead ends: 205 [2024-11-28 03:15:47,842 INFO L226 Difference]: Without dead ends: 205 [2024-11-28 03:15:47,843 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=902, Unknown=2, NotChecked=122, Total=1122 [2024-11-28 03:15:47,843 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 25 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:47,844 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 629 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 607 Invalid, 0 Unknown, 247 Unchecked, 0.5s Time] [2024-11-28 03:15:47,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-28 03:15:47,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 197. [2024-11-28 03:15:47,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 171 states have (on average 1.2573099415204678) internal successors, (215), 183 states have internal predecessors, (215), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-28 03:15:47,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 237 transitions. [2024-11-28 03:15:47,863 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 237 transitions. Word has length 40 [2024-11-28 03:15:47,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:47,863 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 237 transitions. [2024-11-28 03:15:47,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 20 states have internal predecessors, (58), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 03:15:47,863 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 237 transitions. [2024-11-28 03:15:47,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-28 03:15:47,864 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:47,864 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:15:47,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 03:15:48,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-28 03:15:48,065 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:15:48,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:48,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1214165646, now seen corresponding path program 1 times [2024-11-28 03:15:48,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:48,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041422261] [2024-11-28 03:15:48,066 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:48,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:48,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:15:48,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:48,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041422261] [2024-11-28 03:15:48,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041422261] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:15:48,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:15:48,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 03:15:48,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501576803] [2024-11-28 03:15:48,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:15:48,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 03:15:48,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:48,208 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 03:15:48,208 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:15:48,209 INFO L87 Difference]: Start difference. First operand 197 states and 237 transitions. Second operand has 9 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 03:15:48,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:48,347 INFO L93 Difference]: Finished difference Result 202 states and 244 transitions. [2024-11-28 03:15:48,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:15:48,347 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2024-11-28 03:15:48,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:48,349 INFO L225 Difference]: With dead ends: 202 [2024-11-28 03:15:48,349 INFO L226 Difference]: Without dead ends: 202 [2024-11-28 03:15:48,349 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:15:48,350 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 18 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:48,350 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 396 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:15:48,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-28 03:15:48,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2024-11-28 03:15:48,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 175 states have (on average 1.2685714285714285) internal successors, (222), 187 states have internal predecessors, (222), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-28 03:15:48,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 244 transitions. [2024-11-28 03:15:48,357 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 244 transitions. Word has length 39 [2024-11-28 03:15:48,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:48,357 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 244 transitions. [2024-11-28 03:15:48,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 03:15:48,357 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 244 transitions. [2024-11-28 03:15:48,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-28 03:15:48,358 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:48,358 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-28 03:15:48,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-28 03:15:48,359 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:15:48,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:48,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1005952487, now seen corresponding path program 1 times [2024-11-28 03:15:48,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:48,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117367942] [2024-11-28 03:15:48,359 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:48,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:48,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:15:48,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:48,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117367942] [2024-11-28 03:15:48,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117367942] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:48,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551573072] [2024-11-28 03:15:48,987 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:48,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:48,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:48,990 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:15:48,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:15:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:49,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-28 03:15:49,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:15:49,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:15:49,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:15:49,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-28 03:15:49,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-28 03:15:49,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:15:49,319 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 11 [2024-11-28 03:15:49,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:15:49,328 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 11 [2024-11-28 03:15:49,524 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:15:49,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-28 03:15:49,536 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:15:49,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-28 03:15:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:15:49,632 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:15:50,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 03:15:50,628 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 102 treesize of output 98 [2024-11-28 03:15:50,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:15:50,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551573072] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:15:50,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:15:50,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 29 [2024-11-28 03:15:50,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210629877] [2024-11-28 03:15:50,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:15:50,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 03:15:50,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:50,658 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 03:15:50,659 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2024-11-28 03:15:50,659 INFO L87 Difference]: Start difference. First operand 201 states and 244 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 26 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 03:15:51,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:51,441 INFO L93 Difference]: Finished difference Result 208 states and 247 transitions. [2024-11-28 03:15:51,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 03:15:51,443 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 26 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2024-11-28 03:15:51,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:51,445 INFO L225 Difference]: With dead ends: 208 [2024-11-28 03:15:51,448 INFO L226 Difference]: Without dead ends: 208 [2024-11-28 03:15:51,448 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 03:15:51,449 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 21 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:51,449 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1221 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 03:15:51,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2024-11-28 03:15:51,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2024-11-28 03:15:51,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 178 states have (on average 1.2640449438202248) internal successors, (225), 190 states have internal predecessors, (225), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-28 03:15:51,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 247 transitions. [2024-11-28 03:15:51,464 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 247 transitions. Word has length 42 [2024-11-28 03:15:51,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:51,464 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 247 transitions. [2024-11-28 03:15:51,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 26 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 03:15:51,464 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 247 transitions. [2024-11-28 03:15:51,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 03:15:51,465 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:51,465 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:15:51,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 03:15:51,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-28 03:15:51,666 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:15:51,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:51,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1119758442, now seen corresponding path program 1 times [2024-11-28 03:15:51,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:51,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339766752] [2024-11-28 03:15:51,666 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:51,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:51,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:52,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:52,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339766752] [2024-11-28 03:15:52,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339766752] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:52,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651157779] [2024-11-28 03:15:52,389 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:52,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:52,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:52,392 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:15:52,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 03:15:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:52,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-28 03:15:52,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:15:53,126 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-28 03:15:53,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 46 [2024-11-28 03:15:53,555 INFO L349 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2024-11-28 03:15:53,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 42 [2024-11-28 03:15:53,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:53,658 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:15:54,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651157779] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:54,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:15:54,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 31 [2024-11-28 03:15:54,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216824782] [2024-11-28 03:15:54,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:15:54,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 03:15:54,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:54,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 03:15:54,121 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 03:15:54,121 INFO L87 Difference]: Start difference. First operand 204 states and 247 transitions. Second operand has 32 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 27 states have internal predecessors, (71), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 03:15:54,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:54,947 INFO L93 Difference]: Finished difference Result 215 states and 258 transitions. [2024-11-28 03:15:54,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 03:15:54,948 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 27 states have internal predecessors, (71), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 43 [2024-11-28 03:15:54,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:54,949 INFO L225 Difference]: With dead ends: 215 [2024-11-28 03:15:54,949 INFO L226 Difference]: Without dead ends: 196 [2024-11-28 03:15:54,950 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 03:15:54,950 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:54,950 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 611 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 03:15:54,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2024-11-28 03:15:54,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2024-11-28 03:15:54,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 169 states have (on average 1.272189349112426) internal successors, (215), 181 states have internal predecessors, (215), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-28 03:15:54,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 237 transitions. [2024-11-28 03:15:54,961 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 237 transitions. Word has length 43 [2024-11-28 03:15:54,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:54,961 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 237 transitions. [2024-11-28 03:15:54,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 27 states have internal predecessors, (71), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 03:15:54,962 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 237 transitions. [2024-11-28 03:15:54,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 03:15:54,964 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:54,964 INFO L218 NwaCegarLoop]: trace histogram [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, 1] [2024-11-28 03:15:54,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 03:15:55,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-28 03:15:55,168 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:15:55,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:55,169 INFO L85 PathProgramCache]: Analyzing trace with hash 315706920, now seen corresponding path program 1 times [2024-11-28 03:15:55,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:55,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840424055] [2024-11-28 03:15:55,169 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:55,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:56,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:56,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:56,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840424055] [2024-11-28 03:15:56,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840424055] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:56,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756122396] [2024-11-28 03:15:56,407 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:56,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:56,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:56,410 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:15:56,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 03:15:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:56,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-28 03:15:56,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:15:56,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 03:15:56,881 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-28 03:15:56,882 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 [2024-11-28 03:15:56,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 03:15:57,266 INFO L349 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2024-11-28 03:15:57,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2024-11-28 03:15:57,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2024-11-28 03:15:57,422 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 34 treesize of output 25 [2024-11-28 03:15:57,747 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:15:57,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2024-11-28 03:15:58,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 24 treesize of output 20 [2024-11-28 03:15:58,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:58,305 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:15:59,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756122396] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:59,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:15:59,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 43 [2024-11-28 03:15:59,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107860830] [2024-11-28 03:15:59,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:15:59,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-28 03:15:59,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:59,076 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-28 03:15:59,077 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2402, Unknown=2, NotChecked=0, Total=2550 [2024-11-28 03:15:59,077 INFO L87 Difference]: Start difference. First operand 195 states and 237 transitions. Second operand has 44 states, 41 states have (on average 1.829268292682927) internal successors, (75), 36 states have internal predecessors, (75), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 03:16:00,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:16:00,910 INFO L93 Difference]: Finished difference Result 222 states and 270 transitions. [2024-11-28 03:16:00,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 03:16:00,910 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 41 states have (on average 1.829268292682927) internal successors, (75), 36 states have internal predecessors, (75), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 46 [2024-11-28 03:16:00,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:16:00,911 INFO L225 Difference]: With dead ends: 222 [2024-11-28 03:16:00,912 INFO L226 Difference]: Without dead ends: 222 [2024-11-28 03:16:00,913 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=268, Invalid=4020, Unknown=2, NotChecked=0, Total=4290 [2024-11-28 03:16:00,913 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 46 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:16:00,914 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 1125 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 03:16:00,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-11-28 03:16:00,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 212. [2024-11-28 03:16:00,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 185 states have (on average 1.2648648648648648) internal successors, (234), 197 states have internal predecessors, (234), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-28 03:16:00,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 258 transitions. [2024-11-28 03:16:00,922 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 258 transitions. Word has length 46 [2024-11-28 03:16:00,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:16:00,923 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 258 transitions. [2024-11-28 03:16:00,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 41 states have (on average 1.829268292682927) internal successors, (75), 36 states have internal predecessors, (75), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 03:16:00,923 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 258 transitions. [2024-11-28 03:16:00,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 03:16:00,924 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:16:00,924 INFO L218 NwaCegarLoop]: trace histogram [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, 1] [2024-11-28 03:16:00,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 03:16:01,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-28 03:16:01,128 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:16:01,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:01,129 INFO L85 PathProgramCache]: Analyzing trace with hash 315706921, now seen corresponding path program 1 times [2024-11-28 03:16:01,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:01,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647060760] [2024-11-28 03:16:01,129 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:01,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:02,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:02,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:02,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647060760] [2024-11-28 03:16:02,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647060760] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:02,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922852053] [2024-11-28 03:16:02,493 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:02,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:02,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:02,495 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:02,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 03:16:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:02,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-11-28 03:16:02,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:02,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 03:16:02,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 03:16:02,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:16:03,427 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 03:16:03,428 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 [2024-11-28 03:16:03,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-28 03:16:03,451 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-28 03:16:03,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 21 [2024-11-28 03:16:03,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 03:16:03,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-28 03:16:03,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 03:16:03,853 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:16:03,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-28 03:16:03,862 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:16:03,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2024-11-28 03:16:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:04,215 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:04,666 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_987 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_~now~1#1.base| v_ArrVal_987) |c_ULTIMATE.start_main_~shared~0#1.base|) 0))) (forall ((v_ArrVal_986 (Array Int Int)) (v_ArrVal_987 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_~now~1#1.base| v_ArrVal_987) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~now~1#1.base| v_ArrVal_986) |c_ULTIMATE.start_main_~shared~0#1.base|) 0))))) is different from false [2024-11-28 03:16:04,680 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_987 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_#t~ret9#1.base| v_ArrVal_987) |c_ULTIMATE.start_main_~shared~0#1.base|) 0))) (forall ((v_ArrVal_986 (Array Int Int)) (v_ArrVal_987 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_#t~ret9#1.base| v_ArrVal_987) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~ret9#1.base| v_ArrVal_986) |c_ULTIMATE.start_main_~shared~0#1.base|) 0))))) is different from false [2024-11-28 03:16:04,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922852053] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:04,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:16:04,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2024-11-28 03:16:04,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191180958] [2024-11-28 03:16:04,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:04,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-28 03:16:04,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:04,947 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-28 03:16:04,948 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2412, Unknown=2, NotChecked=198, Total=2756 [2024-11-28 03:16:04,949 INFO L87 Difference]: Start difference. First operand 212 states and 258 transitions. Second operand has 44 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 38 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 03:16:07,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:16:07,292 INFO L93 Difference]: Finished difference Result 215 states and 261 transitions. [2024-11-28 03:16:07,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 03:16:07,293 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 38 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 46 [2024-11-28 03:16:07,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:16:07,295 INFO L225 Difference]: With dead ends: 215 [2024-11-28 03:16:07,295 INFO L226 Difference]: Without dead ends: 215 [2024-11-28 03:16:07,296 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=232, Invalid=3806, Unknown=2, NotChecked=250, Total=4290 [2024-11-28 03:16:07,296 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 24 mSDsluCounter, 1805 mSDsCounter, 0 mSdLazyCounter, 1860 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1878 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:16:07,297 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 1878 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1860 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-28 03:16:07,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-11-28 03:16:07,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2024-11-28 03:16:07,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 187 states have (on average 1.2566844919786095) internal successors, (235), 199 states have internal predecessors, (235), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-28 03:16:07,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 259 transitions. [2024-11-28 03:16:07,305 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 259 transitions. Word has length 46 [2024-11-28 03:16:07,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:16:07,305 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 259 transitions. [2024-11-28 03:16:07,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 38 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 03:16:07,306 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 259 transitions. [2024-11-28 03:16:07,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 03:16:07,306 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:16:07,306 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:07,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 03:16:07,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-28 03:16:07,507 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:16:07,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:07,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1082396118, now seen corresponding path program 1 times [2024-11-28 03:16:07,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:07,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128832312] [2024-11-28 03:16:07,508 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:07,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:08,075 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:16:08,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:08,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128832312] [2024-11-28 03:16:08,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128832312] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:08,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441514988] [2024-11-28 03:16:08,076 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:08,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:08,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:08,078 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:08,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 03:16:08,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:08,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 03:16:08,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:08,327 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 03:16:08,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 03:16:08,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 03:16:08,426 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-28 03:16:08,426 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-11-28 03:16:08,440 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 13 [2024-11-28 03:16:08,460 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2024-11-28 03:16:08,501 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-28 03:16:08,502 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 [2024-11-28 03:16:08,504 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 5 not checked. [2024-11-28 03:16:08,504 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:08,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441514988] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:08,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:16:08,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 22 [2024-11-28 03:16:08,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703577850] [2024-11-28 03:16:08,576 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:08,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 03:16:08,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:08,577 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 03:16:08,577 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=449, Unknown=1, NotChecked=42, Total=552 [2024-11-28 03:16:08,578 INFO L87 Difference]: Start difference. First operand 214 states and 259 transitions. Second operand has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 19 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 03:16:09,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:16:09,058 INFO L93 Difference]: Finished difference Result 213 states and 257 transitions. [2024-11-28 03:16:09,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:16:09,058 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 19 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2024-11-28 03:16:09,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:16:09,060 INFO L225 Difference]: With dead ends: 213 [2024-11-28 03:16:09,060 INFO L226 Difference]: Without dead ends: 213 [2024-11-28 03:16:09,060 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=662, Unknown=1, NotChecked=52, Total=812 [2024-11-28 03:16:09,061 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 11 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:16:09,061 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 647 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 442 Invalid, 0 Unknown, 66 Unchecked, 0.3s Time] [2024-11-28 03:16:09,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2024-11-28 03:16:09,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2024-11-28 03:16:09,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 187 states have (on average 1.2459893048128343) internal successors, (233), 198 states have internal predecessors, (233), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-28 03:16:09,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 257 transitions. [2024-11-28 03:16:09,069 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 257 transitions. Word has length 48 [2024-11-28 03:16:09,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:16:09,069 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 257 transitions. [2024-11-28 03:16:09,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 19 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 03:16:09,070 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 257 transitions. [2024-11-28 03:16:09,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 03:16:09,070 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:16:09,070 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:09,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 03:16:09,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-28 03:16:09,275 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:16:09,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:09,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1082396119, now seen corresponding path program 1 times [2024-11-28 03:16:09,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:09,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012945255] [2024-11-28 03:16:09,276 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:09,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:09,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:10,060 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:16:10,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:10,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012945255] [2024-11-28 03:16:10,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012945255] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:10,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751531238] [2024-11-28 03:16:10,061 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:10,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:10,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:10,063 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:10,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 03:16:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:10,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-28 03:16:10,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:10,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 03:16:10,365 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 03:16:10,365 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 [2024-11-28 03:16:10,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:16:10,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 03:16:10,494 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-28 03:16:10,494 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 52 [2024-11-28 03:16:10,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2024-11-28 03:16:10,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2024-11-28 03:16:10,589 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 7 treesize of output 3 [2024-11-28 03:16:10,718 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2024-11-28 03:16:10,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:16:10,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-28 03:16:10,772 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 03:16:10,772 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 [2024-11-28 03:16:10,806 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2024-11-28 03:16:10,806 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:10,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751531238] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:10,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:16:10,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 29 [2024-11-28 03:16:10,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169811646] [2024-11-28 03:16:10,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:10,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 03:16:10,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:10,943 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 03:16:10,943 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=842, Unknown=1, NotChecked=58, Total=992 [2024-11-28 03:16:10,943 INFO L87 Difference]: Start difference. First operand 213 states and 257 transitions. Second operand has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 23 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-28 03:16:11,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:16:11,651 INFO L93 Difference]: Finished difference Result 210 states and 251 transitions. [2024-11-28 03:16:11,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 03:16:11,652 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 23 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 48 [2024-11-28 03:16:11,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:16:11,653 INFO L225 Difference]: With dead ends: 210 [2024-11-28 03:16:11,653 INFO L226 Difference]: Without dead ends: 210 [2024-11-28 03:16:11,653 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=161, Invalid=1248, Unknown=1, NotChecked=72, Total=1482 [2024-11-28 03:16:11,654 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 26 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:16:11,655 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 840 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 617 Invalid, 0 Unknown, 76 Unchecked, 0.4s Time] [2024-11-28 03:16:11,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2024-11-28 03:16:11,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2024-11-28 03:16:11,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 187 states have (on average 1.213903743315508) internal successors, (227), 195 states have internal predecessors, (227), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-28 03:16:11,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 251 transitions. [2024-11-28 03:16:11,662 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 251 transitions. Word has length 48 [2024-11-28 03:16:11,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:16:11,663 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 251 transitions. [2024-11-28 03:16:11,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 23 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-28 03:16:11,663 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 251 transitions. [2024-11-28 03:16:11,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 03:16:11,664 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:16:11,664 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-28 03:16:11,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 03:16:11,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:11,865 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:16:11,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:11,866 INFO L85 PathProgramCache]: Analyzing trace with hash -753466862, now seen corresponding path program 1 times [2024-11-28 03:16:11,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:11,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907430974] [2024-11-28 03:16:11,866 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:11,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:12,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:12,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907430974] [2024-11-28 03:16:12,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907430974] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:12,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93169610] [2024-11-28 03:16:12,632 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:12,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:12,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:12,634 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:12,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 03:16:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:12,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-28 03:16:12,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:12,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 03:16:13,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2024-11-28 03:16:13,199 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 03:16:13,200 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 [2024-11-28 03:16:13,219 WARN L851 $PredicateComparison]: unable to prove that (and (or (exists ((|v_old(#memory_$Pointer$#0.base)_AFTER_CALL_44| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_old(#memory_$Pointer$#0.base)_AFTER_CALL_44| |c_#memory_$Pointer$#0.base|))) (and (= .cse0 |c_ULTIMATE.start_create_#t~ret9#1.base|) (<= (+ (select (select |v_old(#memory_$Pointer$#0.base)_AFTER_CALL_44| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 1) |c_#StackHeapBarrier|) (= (store |v_old(#memory_$Pointer$#0.base)_AFTER_CALL_44| .cse0 (select |c_#memory_$Pointer$#0.base| .cse0)) |c_#memory_$Pointer$#0.base|)))) (< (select (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) |c_#StackHeapBarrier|)) (not (= |c_ULTIMATE.start_create_#t~ret9#1.base| |c_ULTIMATE.start_main_~shared~0#1.base|))) is different from false [2024-11-28 03:16:13,222 WARN L873 $PredicateComparison]: unable to prove that (and (or (exists ((|v_old(#memory_$Pointer$#0.base)_AFTER_CALL_44| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_old(#memory_$Pointer$#0.base)_AFTER_CALL_44| |c_#memory_$Pointer$#0.base|))) (and (= .cse0 |c_ULTIMATE.start_create_#t~ret9#1.base|) (<= (+ (select (select |v_old(#memory_$Pointer$#0.base)_AFTER_CALL_44| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 1) |c_#StackHeapBarrier|) (= (store |v_old(#memory_$Pointer$#0.base)_AFTER_CALL_44| .cse0 (select |c_#memory_$Pointer$#0.base| .cse0)) |c_#memory_$Pointer$#0.base|)))) (< (select (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) |c_#StackHeapBarrier|)) (not (= |c_ULTIMATE.start_create_#t~ret9#1.base| |c_ULTIMATE.start_main_~shared~0#1.base|))) is different from true [2024-11-28 03:16:13,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-28 03:16:13,374 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:16:13,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2024-11-28 03:16:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:13,497 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:13,757 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1274 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~now~1#1.base| v_ArrVal_1274) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) |c_#StackHeapBarrier|)) is different from false [2024-11-28 03:16:13,764 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1274 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~ret9#1.base| v_ArrVal_1274) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) |c_#StackHeapBarrier|)) is different from false [2024-11-28 03:16:13,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93169610] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:13,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:16:13,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 35 [2024-11-28 03:16:13,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891786023] [2024-11-28 03:16:13,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:13,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-28 03:16:13,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:13,877 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-28 03:16:13,878 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1320, Unknown=4, NotChecked=222, Total=1640 [2024-11-28 03:16:13,878 INFO L87 Difference]: Start difference. First operand 210 states and 251 transitions. Second operand has 36 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 30 states have internal predecessors, (68), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 03:16:14,710 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_main_~shared~0#1.base|))) (let ((.cse1 (select .cse2 0))) (and (or (exists ((|v_old(#memory_$Pointer$#0.base)_AFTER_CALL_44| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_old(#memory_$Pointer$#0.base)_AFTER_CALL_44| |c_#memory_$Pointer$#0.base|))) (and (= .cse0 |c_ULTIMATE.start_create_#t~ret9#1.base|) (<= (+ (select (select |v_old(#memory_$Pointer$#0.base)_AFTER_CALL_44| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 1) |c_#StackHeapBarrier|) (= (store |v_old(#memory_$Pointer$#0.base)_AFTER_CALL_44| .cse0 (select |c_#memory_$Pointer$#0.base| .cse0)) |c_#memory_$Pointer$#0.base|)))) (< .cse1 |c_#StackHeapBarrier|)) (<= (+ .cse1 1) |c_#StackHeapBarrier|) (<= (+ (select .cse2 |c_ULTIMATE.start_main_~shared~0#1.offset|) 1) |c_#StackHeapBarrier|) (not (= |c_ULTIMATE.start_create_#t~ret9#1.base| |c_ULTIMATE.start_main_~shared~0#1.base|))))) is different from false [2024-11-28 03:16:14,713 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_main_~shared~0#1.base|))) (let ((.cse1 (select .cse2 0))) (and (or (exists ((|v_old(#memory_$Pointer$#0.base)_AFTER_CALL_44| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_old(#memory_$Pointer$#0.base)_AFTER_CALL_44| |c_#memory_$Pointer$#0.base|))) (and (= .cse0 |c_ULTIMATE.start_create_#t~ret9#1.base|) (<= (+ (select (select |v_old(#memory_$Pointer$#0.base)_AFTER_CALL_44| |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 1) |c_#StackHeapBarrier|) (= (store |v_old(#memory_$Pointer$#0.base)_AFTER_CALL_44| .cse0 (select |c_#memory_$Pointer$#0.base| .cse0)) |c_#memory_$Pointer$#0.base|)))) (< .cse1 |c_#StackHeapBarrier|)) (<= (+ .cse1 1) |c_#StackHeapBarrier|) (<= (+ (select .cse2 |c_ULTIMATE.start_main_~shared~0#1.offset|) 1) |c_#StackHeapBarrier|) (not (= |c_ULTIMATE.start_create_#t~ret9#1.base| |c_ULTIMATE.start_main_~shared~0#1.base|))))) is different from true [2024-11-28 03:16:15,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:16:15,175 INFO L93 Difference]: Finished difference Result 212 states and 254 transitions. [2024-11-28 03:16:15,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 03:16:15,176 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 30 states have internal predecessors, (68), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 49 [2024-11-28 03:16:15,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:16:15,177 INFO L225 Difference]: With dead ends: 212 [2024-11-28 03:16:15,177 INFO L226 Difference]: Without dead ends: 212 [2024-11-28 03:16:15,178 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=179, Invalid=2483, Unknown=6, NotChecked=412, Total=3080 [2024-11-28 03:16:15,179 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 22 mSDsluCounter, 1401 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1469 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:16:15,179 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1469 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1280 Invalid, 0 Unknown, 139 Unchecked, 0.8s Time] [2024-11-28 03:16:15,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2024-11-28 03:16:15,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2024-11-28 03:16:15,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 188 states have (on average 1.2127659574468086) internal successors, (228), 196 states have internal predecessors, (228), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-28 03:16:15,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 252 transitions. [2024-11-28 03:16:15,186 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 252 transitions. Word has length 49 [2024-11-28 03:16:15,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:16:15,187 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 252 transitions. [2024-11-28 03:16:15,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 30 states have internal predecessors, (68), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 03:16:15,187 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 252 transitions. [2024-11-28 03:16:15,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-28 03:16:15,188 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:16:15,188 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:15,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 03:16:15,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:15,389 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:16:15,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:15,389 INFO L85 PathProgramCache]: Analyzing trace with hash -2067385216, now seen corresponding path program 1 times [2024-11-28 03:16:15,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:15,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651467960] [2024-11-28 03:16:15,390 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:15,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:15,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:17,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:17,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651467960] [2024-11-28 03:16:17,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651467960] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:17,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119869894] [2024-11-28 03:16:17,072 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:17,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:17,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:17,074 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:17,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 03:16:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:17,245 INFO L256 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-11-28 03:16:17,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:17,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 03:16:17,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:16:17,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:16:17,807 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-28 03:16:17,808 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 16 treesize of output 15 [2024-11-28 03:16:17,827 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-28 03:16:17,828 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 16 treesize of output 15 [2024-11-28 03:16:17,852 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-28 03:16:17,852 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 [2024-11-28 03:16:18,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 03:16:18,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 03:16:18,181 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 03:16:18,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 03:16:18,185 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 16 treesize of output 11 [2024-11-28 03:16:18,190 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 16 treesize of output 11 [2024-11-28 03:16:18,250 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 16 treesize of output 11 [2024-11-28 03:16:18,256 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 23 treesize of output 11 [2024-11-28 03:16:18,423 INFO L349 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2024-11-28 03:16:18,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 52 [2024-11-28 03:16:18,433 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 20 treesize of output 11 [2024-11-28 03:16:18,445 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 12 treesize of output 8 [2024-11-28 03:16:18,602 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:16:18,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-28 03:16:18,610 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:16:18,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-28 03:16:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:18,788 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:18,985 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1377 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~mem12#1.base| v_ArrVal_1377) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0)) (forall ((v_ArrVal_1376 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_#t~mem12#1.base| v_ArrVal_1376) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0))) is different from false [2024-11-28 03:16:18,994 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~now~1#1.base|) |c_ULTIMATE.start_create_~now~1#1.offset|))) (and (forall ((v_ArrVal_1377 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#0.base| .cse0 v_ArrVal_1377) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0)) (forall ((v_ArrVal_1376 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#0.offset| .cse0 v_ArrVal_1376) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0)))) is different from false [2024-11-28 03:16:27,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119869894] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:27,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:16:27,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 45 [2024-11-28 03:16:27,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054551562] [2024-11-28 03:16:27,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:27,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-28 03:16:27,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:27,438 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-28 03:16:27,439 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2192, Unknown=33, NotChecked=190, Total=2550 [2024-11-28 03:16:27,439 INFO L87 Difference]: Start difference. First operand 211 states and 252 transitions. Second operand has 45 states, 43 states have (on average 1.813953488372093) internal successors, (78), 38 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 03:16:29,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:16:29,550 INFO L93 Difference]: Finished difference Result 232 states and 276 transitions. [2024-11-28 03:16:29,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 03:16:29,551 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 1.813953488372093) internal successors, (78), 38 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2024-11-28 03:16:29,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:16:29,552 INFO L225 Difference]: With dead ends: 232 [2024-11-28 03:16:29,552 INFO L226 Difference]: Without dead ends: 232 [2024-11-28 03:16:29,553 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=264, Invalid=3995, Unknown=39, NotChecked=258, Total=4556 [2024-11-28 03:16:29,554 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 31 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:16:29,554 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 1046 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 03:16:29,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-11-28 03:16:29,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 230. [2024-11-28 03:16:29,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 206 states have (on average 1.1990291262135921) internal successors, (247), 214 states have internal predecessors, (247), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-28 03:16:29,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 273 transitions. [2024-11-28 03:16:29,564 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 273 transitions. Word has length 50 [2024-11-28 03:16:29,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:16:29,564 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 273 transitions. [2024-11-28 03:16:29,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 1.813953488372093) internal successors, (78), 38 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 03:16:29,564 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 273 transitions. [2024-11-28 03:16:29,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 03:16:29,565 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:16:29,565 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:29,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-28 03:16:29,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:29,766 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:16:29,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:29,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1032074224, now seen corresponding path program 2 times [2024-11-28 03:16:29,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:29,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37721459] [2024-11-28 03:16:29,767 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:16:29,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:29,791 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:16:29,791 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:16:31,506 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:16:31,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:31,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37721459] [2024-11-28 03:16:31,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37721459] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:31,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748712092] [2024-11-28 03:16:31,506 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:16:31,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:31,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:31,508 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:31,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 03:16:31,705 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:16:31,706 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:16:31,708 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 88 conjuncts are in the unsatisfiable core [2024-11-28 03:16:31,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:31,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 03:16:31,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:16:31,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:16:32,110 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-28 03:16:32,110 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 20 treesize of output 23 [2024-11-28 03:16:32,140 INFO L349 Elim1Store]: treesize reduction 29, result has 44.2 percent of original size [2024-11-28 03:16:32,140 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 27 [2024-11-28 03:16:33,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:16:33,126 INFO L349 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2024-11-28 03:16:33,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 84 treesize of output 97 [2024-11-28 03:16:33,150 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-28 03:16:33,150 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 72 treesize of output 75 [2024-11-28 03:16:33,184 INFO L349 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2024-11-28 03:16:33,185 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 68 treesize of output 86 [2024-11-28 03:16:40,019 INFO L349 Elim1Store]: treesize reduction 320, result has 77.5 percent of original size [2024-11-28 03:16:40,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 17 select indices, 17 select index equivalence classes, 1 disjoint index pairs (out of 136 index pairs), introduced 33 new quantified variables, introduced 152 case distinctions, treesize of input 549 treesize of output 1540 [2024-11-28 03:16:40,557 INFO L349 Elim1Store]: treesize reduction 80, result has 67.3 percent of original size [2024-11-28 03:16:40,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 435 treesize of output 567 [2024-11-28 03:29:03,781 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-28 03:29:03,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101 [2024-11-28 03:29:03,783 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-28 03:29:03,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-28 03:29:03,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-28 03:29:03,984 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.assertTerm(Scriptor.java:147) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.assertTerm(DiffWrapperScript.java:111) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.assertTerm(WrapperScript.java:158) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:584) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:728) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:234) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:195) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:291) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:181) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:428) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:314) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:275) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:132) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 59 more [2024-11-28 03:29:03,989 INFO L158 Benchmark]: Toolchain (without parser) took 822304.78ms. Allocated memory was 117.4MB in the beginning and 1.6GB in the end (delta: 1.5GB). Free memory was 91.5MB in the beginning and 820.0MB in the end (delta: -728.5MB). Peak memory consumption was 958.0MB. Max. memory is 16.1GB. [2024-11-28 03:29:03,989 INFO L158 Benchmark]: CDTParser took 1.31ms. Allocated memory is still 167.8MB. Free memory is still 105.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:29:03,990 INFO L158 Benchmark]: CACSL2BoogieTranslator took 509.85ms. Allocated memory is still 117.4MB. Free memory was 91.5MB in the beginning and 72.3MB in the end (delta: 19.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 03:29:03,991 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.18ms. Allocated memory is still 117.4MB. Free memory was 72.3MB in the beginning and 70.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:29:03,991 INFO L158 Benchmark]: Boogie Preprocessor took 54.62ms. Allocated memory is still 117.4MB. Free memory was 70.8MB in the beginning and 68.5MB in the end (delta: 2.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 03:29:03,992 INFO L158 Benchmark]: RCFGBuilder took 656.13ms. Allocated memory is still 117.4MB. Free memory was 68.1MB in the beginning and 49.7MB in the end (delta: 18.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 03:29:03,992 INFO L158 Benchmark]: TraceAbstraction took 821029.10ms. Allocated memory was 117.4MB in the beginning and 1.6GB in the end (delta: 1.5GB). Free memory was 48.9MB in the beginning and 820.0MB in the end (delta: -771.1MB). Peak memory consumption was 924.4MB. Max. memory is 16.1GB. [2024-11-28 03:29:03,993 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.31ms. Allocated memory is still 167.8MB. Free memory is still 105.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 509.85ms. Allocated memory is still 117.4MB. Free memory was 91.5MB in the beginning and 72.3MB in the end (delta: 19.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.18ms. Allocated memory is still 117.4MB. Free memory was 72.3MB in the beginning and 70.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 54.62ms. Allocated memory is still 117.4MB. Free memory was 70.8MB in the beginning and 68.5MB in the end (delta: 2.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 656.13ms. Allocated memory is still 117.4MB. Free memory was 68.1MB in the beginning and 49.7MB in the end (delta: 18.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 821029.10ms. Allocated memory was 117.4MB in the beginning and 1.6GB in the end (delta: 1.5GB). Free memory was 48.9MB in the beginning and 820.0MB in the end (delta: -771.1MB). Peak memory consumption was 924.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/sll-shared-sll-before.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 3d5c47b12a731095d5a51b5ad7e19fee7b2131bbe4b3910b3108642fe52c085d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:29:06,463 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:29:06,598 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Bitvector.epf [2024-11-28 03:29:06,611 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:29:06,612 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:29:06,656 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:29:06,656 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:29:06,657 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:29:06,658 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:29:06,658 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:29:06,659 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:29:06,659 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:29:06,659 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:29:06,659 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:29:06,660 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:29:06,660 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:29:06,661 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:29:06,661 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:29:06,661 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 03:29:06,661 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 03:29:06,661 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 03:29:06,661 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:29:06,661 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 03:29:06,661 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-28 03:29:06,662 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-28 03:29:06,662 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 03:29:06,662 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:29:06,662 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:29:06,662 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:29:06,662 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:29:06,662 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:29:06,663 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:29:06,663 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:29:06,663 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:29:06,664 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:29:06,664 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:29:06,664 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:29:06,664 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:29:06,664 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:29:06,665 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:29:06,665 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-28 03:29:06,665 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-28 03:29:06,665 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:29:06,665 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:29:06,665 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:29:06,665 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:29:06,666 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_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d5c47b12a731095d5a51b5ad7e19fee7b2131bbe4b3910b3108642fe52c085d [2024-11-28 03:29:07,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:29:07,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:29:07,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:29:07,036 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:29:07,037 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:29:07,039 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/memsafety-broom/sll-shared-sll-before.i [2024-11-28 03:29:10,027 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/data/5e688576d/37f793f78dfd4b8280b3f4cdf25c48e6/FLAG7835d117a [2024-11-28 03:29:10,473 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:29:10,474 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/sv-benchmarks/c/memsafety-broom/sll-shared-sll-before.i [2024-11-28 03:29:10,515 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/data/5e688576d/37f793f78dfd4b8280b3f4cdf25c48e6/FLAG7835d117a [2024-11-28 03:29:10,619 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/data/5e688576d/37f793f78dfd4b8280b3f4cdf25c48e6 [2024-11-28 03:29:10,621 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:29:10,623 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:29:10,626 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:29:10,627 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:29:10,637 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:29:10,639 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:29:10" (1/1) ... [2024-11-28 03:29:10,640 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e7915c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:10, skipping insertion in model container [2024-11-28 03:29:10,640 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:29:10" (1/1) ... [2024-11-28 03:29:10,705 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:29:11,059 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:29:11,068 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:29:11,142 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:29:11,172 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:29:11,173 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:11 WrapperNode [2024-11-28 03:29:11,173 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:29:11,174 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:29:11,174 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:29:11,174 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:29:11,181 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:11" (1/1) ... [2024-11-28 03:29:11,196 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:11" (1/1) ... [2024-11-28 03:29:11,222 INFO L138 Inliner]: procedures = 121, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 82 [2024-11-28 03:29:11,223 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:29:11,223 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:29:11,223 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:29:11,224 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:29:11,233 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:11" (1/1) ... [2024-11-28 03:29:11,233 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:11" (1/1) ... [2024-11-28 03:29:11,237 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:11" (1/1) ... [2024-11-28 03:29:11,270 INFO L175 MemorySlicer]: Split 12 memory accesses to 1 slices as follows [12]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 7 writes are split as follows [7]. [2024-11-28 03:29:11,271 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:11" (1/1) ... [2024-11-28 03:29:11,271 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:11" (1/1) ... [2024-11-28 03:29:11,287 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:11" (1/1) ... [2024-11-28 03:29:11,288 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:11" (1/1) ... [2024-11-28 03:29:11,293 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:11" (1/1) ... [2024-11-28 03:29:11,295 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:11" (1/1) ... [2024-11-28 03:29:11,296 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:11" (1/1) ... [2024-11-28 03:29:11,298 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:29:11,299 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:29:11,299 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:29:11,299 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:29:11,300 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:11" (1/1) ... [2024-11-28 03:29:11,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:29:11,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:29:11,334 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:29:11,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:29:11,369 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero_internal [2024-11-28 03:29:11,369 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero_internal [2024-11-28 03:29:11,369 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2024-11-28 03:29:11,369 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2024-11-28 03:29:11,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 03:29:11,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-28 03:29:11,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-28 03:29:11,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 03:29:11,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:29:11,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:29:11,516 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:29:11,518 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:29:12,026 INFO L? ?]: Removed 84 outVars from TransFormulas that were not future-live. [2024-11-28 03:29:12,026 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:29:12,043 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:29:12,043 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 03:29:12,044 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:29:12 BoogieIcfgContainer [2024-11-28 03:29:12,044 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:29:12,046 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:29:12,046 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:29:12,051 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:29:12,051 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:29:10" (1/3) ... [2024-11-28 03:29:12,051 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3661e5cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:29:12, skipping insertion in model container [2024-11-28 03:29:12,052 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:29:11" (2/3) ... [2024-11-28 03:29:12,052 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3661e5cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:29:12, skipping insertion in model container [2024-11-28 03:29:12,052 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:29:12" (3/3) ... [2024-11-28 03:29:12,053 INFO L128 eAbstractionObserver]: Analyzing ICFG sll-shared-sll-before.i [2024-11-28 03:29:12,072 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:29:12,074 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sll-shared-sll-before.i that has 3 procedures, 87 locations, 1 initial locations, 4 loop locations, and 31 error locations. [2024-11-28 03:29:12,129 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:29:12,148 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;@4b32a3ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:29:12,148 INFO L334 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2024-11-28 03:29:12,153 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 80 states have internal predecessors, (88), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 03:29:12,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-28 03:29:12,159 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:29:12,159 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-28 03:29:12,160 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zero_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:29:12,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:29:12,165 INFO L85 PathProgramCache]: Analyzing trace with hash 37399427, now seen corresponding path program 1 times [2024-11-28 03:29:12,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:29:12,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4857286] [2024-11-28 03:29:12,175 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:29:12,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:29:12,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:29:12,178 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:29:12,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:29:12,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:29:12,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 03:29:12,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:29:12,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 03:29:12,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:29:12,387 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:29:12,388 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:29:12,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4857286] [2024-11-28 03:29:12,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4857286] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:29:12,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:29:12,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:29:12,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944124719] [2024-11-28 03:29:12,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:29:12,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:29:12,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:29:12,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:29:12,420 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:29:12,422 INFO L87 Difference]: Start difference. First operand has 87 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 80 states have internal predecessors, (88), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:29:12,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:29:12,618 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2024-11-28 03:29:12,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:29:12,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-28 03:29:12,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:29:12,628 INFO L225 Difference]: With dead ends: 86 [2024-11-28 03:29:12,628 INFO L226 Difference]: Without dead ends: 84 [2024-11-28 03:29:12,630 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:29:12,633 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 1 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:29:12,634 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 144 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:29:12,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-28 03:29:12,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-11-28 03:29:12,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 48 states have (on average 1.6875) internal successors, (81), 77 states have internal predecessors, (81), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 03:29:12,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2024-11-28 03:29:12,680 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 5 [2024-11-28 03:29:12,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:29:12,682 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2024-11-28 03:29:12,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:29:12,683 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2024-11-28 03:29:12,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-28 03:29:12,683 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:29:12,684 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-28 03:29:12,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 03:29:12,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:29:12,885 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zero_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:29:12,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:29:12,886 INFO L85 PathProgramCache]: Analyzing trace with hash 37399428, now seen corresponding path program 1 times [2024-11-28 03:29:12,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:29:12,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194067886] [2024-11-28 03:29:12,886 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:29:12,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:29:12,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:29:12,888 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:29:12,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:29:12,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:29:12,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 03:29:12,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:29:12,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 03:29:12,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:29:12,998 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:29:12,998 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:29:12,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194067886] [2024-11-28 03:29:12,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194067886] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:29:12,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:29:12,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:29:12,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832449196] [2024-11-28 03:29:12,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:29:12,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:29:13,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:29:13,001 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:29:13,002 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:29:13,002 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:29:13,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:29:13,230 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2024-11-28 03:29:13,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:29:13,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-28 03:29:13,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:29:13,232 INFO L225 Difference]: With dead ends: 83 [2024-11-28 03:29:13,232 INFO L226 Difference]: Without dead ends: 83 [2024-11-28 03:29:13,233 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:29:13,233 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 1 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:29:13,234 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 148 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:29:13,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-28 03:29:13,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2024-11-28 03:29:13,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 76 states have internal predecessors, (80), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 03:29:13,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2024-11-28 03:29:13,242 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 5 [2024-11-28 03:29:13,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:29:13,243 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2024-11-28 03:29:13,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:29:13,243 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2024-11-28 03:29:13,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-28 03:29:13,244 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:29:13,244 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:29:13,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 03:29:13,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:29:13,444 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:29:13,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:29:13,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1573530296, now seen corresponding path program 1 times [2024-11-28 03:29:13,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:29:13,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1373397726] [2024-11-28 03:29:13,446 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:29:13,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:29:13,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:29:13,449 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:29:13,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:29:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:29:13,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 03:29:13,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:29:13,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 03:29:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:29:13,566 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:29:13,566 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:29:13,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373397726] [2024-11-28 03:29:13,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373397726] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:29:13,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:29:13,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:29:13,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642840354] [2024-11-28 03:29:13,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:29:13,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:29:13,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:29:13,568 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:29:13,568 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:29:13,568 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 03:29:13,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:29:13,733 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2024-11-28 03:29:13,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:29:13,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-11-28 03:29:13,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:29:13,735 INFO L225 Difference]: With dead ends: 81 [2024-11-28 03:29:13,735 INFO L226 Difference]: Without dead ends: 81 [2024-11-28 03:29:13,736 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:29:13,736 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 2 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:29:13,737 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 134 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:29:13,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-28 03:29:13,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-11-28 03:29:13,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 48 states have (on average 1.625) internal successors, (78), 74 states have internal predecessors, (78), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 03:29:13,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2024-11-28 03:29:13,743 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 16 [2024-11-28 03:29:13,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:29:13,745 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2024-11-28 03:29:13,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 03:29:13,745 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2024-11-28 03:29:13,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-28 03:29:13,745 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:29:13,746 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:29:13,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 03:29:13,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:29:13,946 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:29:13,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:29:13,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1573530297, now seen corresponding path program 1 times [2024-11-28 03:29:13,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:29:13,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267929560] [2024-11-28 03:29:13,948 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:29:13,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:29:13,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:29:13,950 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:29:13,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:29:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:29:14,033 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 03:29:14,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:29:14,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 03:29:14,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:29:14,066 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:29:14,066 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:29:14,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267929560] [2024-11-28 03:29:14,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267929560] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:29:14,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:29:14,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:29:14,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973740258] [2024-11-28 03:29:14,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:29:14,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:29:14,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:29:14,067 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:29:14,068 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:29:14,068 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 03:29:14,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:29:14,291 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2024-11-28 03:29:14,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:29:14,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-11-28 03:29:14,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:29:14,293 INFO L225 Difference]: With dead ends: 79 [2024-11-28 03:29:14,293 INFO L226 Difference]: Without dead ends: 79 [2024-11-28 03:29:14,293 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:29:14,294 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 2 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:29:14,295 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 141 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:29:14,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-28 03:29:14,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2024-11-28 03:29:14,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 72 states have internal predecessors, (76), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 03:29:14,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2024-11-28 03:29:14,310 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 16 [2024-11-28 03:29:14,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:29:14,310 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2024-11-28 03:29:14,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 03:29:14,310 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2024-11-28 03:29:14,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 03:29:14,311 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:29:14,311 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:29:14,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 03:29:14,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:29:14,512 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:29:14,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:29:14,512 INFO L85 PathProgramCache]: Analyzing trace with hash 439575021, now seen corresponding path program 1 times [2024-11-28 03:29:14,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:29:14,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111796097] [2024-11-28 03:29:14,513 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:29:14,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:29:14,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:29:14,516 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:29:14,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:29:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:29:14,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 03:29:14,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:29:14,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 03:29:14,753 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base)))) is different from true [2024-11-28 03:29:14,837 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 03:29:14,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 03:29:14,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-28 03:29:14,847 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:29:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:29:15,199 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:29:15,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111796097] [2024-11-28 03:29:15,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111796097] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:29:15,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:29:15,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2024-11-28 03:29:15,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045467310] [2024-11-28 03:29:15,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:29:15,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 03:29:15,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:29:15,201 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 03:29:15,201 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=43, Unknown=1, NotChecked=12, Total=72 [2024-11-28 03:29:15,202 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 03:29:15,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:29:15,846 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2024-11-28 03:29:15,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:29:15,846 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 18 [2024-11-28 03:29:15,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:29:15,847 INFO L225 Difference]: With dead ends: 84 [2024-11-28 03:29:15,848 INFO L226 Difference]: Without dead ends: 84 [2024-11-28 03:29:15,848 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=69, Unknown=1, NotChecked=16, Total=110 [2024-11-28 03:29:15,849 INFO L435 NwaCegarLoop]: 71 mSDtfsCounter, 8 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:29:15,849 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 288 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 198 Invalid, 0 Unknown, 88 Unchecked, 0.5s Time] [2024-11-28 03:29:15,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-28 03:29:15,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2024-11-28 03:29:15,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 74 states have internal predecessors, (80), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 03:29:15,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2024-11-28 03:29:15,857 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 18 [2024-11-28 03:29:15,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:29:15,857 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2024-11-28 03:29:15,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 03:29:15,857 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2024-11-28 03:29:15,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 03:29:15,858 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:29:15,858 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:29:15,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 03:29:16,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:29:16,059 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:29:16,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:29:16,059 INFO L85 PathProgramCache]: Analyzing trace with hash 439575022, now seen corresponding path program 1 times [2024-11-28 03:29:16,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:29:16,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060331182] [2024-11-28 03:29:16,060 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:29:16,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:29:16,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:29:16,062 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:29:16,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:29:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:29:16,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 03:29:16,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:29:16,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 03:29:16,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 03:29:16,497 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base)))) is different from true [2024-11-28 03:29:16,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:29:16,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-28 03:29:16,585 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 03:29:16,585 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 13 [2024-11-28 03:29:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-28 03:29:16,620 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:29:16,993 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:29:16,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060331182] [2024-11-28 03:29:16,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060331182] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:29:16,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [89838832] [2024-11-28 03:29:16,993 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:29:16,994 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 03:29:16,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 03:29:16,997 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 03:29:16,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2024-11-28 03:29:17,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:29:17,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 03:29:17,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:29:17,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 03:29:17,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 03:29:17,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:29:17,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-28 03:29:17,450 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 03:29:17,451 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 13 [2024-11-28 03:29:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-28 03:29:17,460 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:29:21,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [89838832] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:29:21,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:29:21,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-28 03:29:21,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911145997] [2024-11-28 03:29:21,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:29:21,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 03:29:21,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:29:21,725 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 03:29:21,725 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=70, Unknown=1, NotChecked=16, Total=110 [2024-11-28 03:29:21,725 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 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) [2024-11-28 03:29:22,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:29:22,555 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2024-11-28 03:29:22,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:29:22,556 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 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 18 [2024-11-28 03:29:22,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:29:22,557 INFO L225 Difference]: With dead ends: 86 [2024-11-28 03:29:22,557 INFO L226 Difference]: Without dead ends: 86 [2024-11-28 03:29:22,557 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=29, Invalid=106, Unknown=1, NotChecked=20, Total=156 [2024-11-28 03:29:22,558 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 7 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:29:22,558 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 281 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 208 Invalid, 0 Unknown, 89 Unchecked, 0.6s Time] [2024-11-28 03:29:22,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-28 03:29:22,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2024-11-28 03:29:22,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 53 states have (on average 1.528301886792453) internal successors, (81), 76 states have internal predecessors, (81), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 03:29:22,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2024-11-28 03:29:22,569 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 18 [2024-11-28 03:29:22,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:29:22,569 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2024-11-28 03:29:22,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 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) [2024-11-28 03:29:22,570 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2024-11-28 03:29:22,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 03:29:22,571 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:29:22,571 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:29:22,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2024-11-28 03:29:22,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 03:29:22,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:29:22,972 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:29:22,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:29:22,972 INFO L85 PathProgramCache]: Analyzing trace with hash -70076739, now seen corresponding path program 1 times [2024-11-28 03:29:22,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:29:22,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780153497] [2024-11-28 03:29:22,973 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:29:22,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:29:22,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:29:22,975 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:29:22,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:29:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:29:23,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 03:29:23,070 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:29:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:29:23,133 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:29:23,133 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:29:23,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780153497] [2024-11-28 03:29:23,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780153497] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:29:23,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:29:23,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:29:23,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168497928] [2024-11-28 03:29:23,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:29:23,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:29:23,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:29:23,134 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:29:23,135 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:29:23,135 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 03:29:23,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:29:23,508 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2024-11-28 03:29:23,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:29:23,509 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2024-11-28 03:29:23,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:29:23,510 INFO L225 Difference]: With dead ends: 86 [2024-11-28 03:29:23,513 INFO L226 Difference]: Without dead ends: 86 [2024-11-28 03:29:23,513 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:29:23,514 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 11 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:29:23,514 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 242 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 03:29:23,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-28 03:29:23,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2024-11-28 03:29:23,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 53 states have (on average 1.471698113207547) internal successors, (78), 73 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 03:29:23,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2024-11-28 03:29:23,527 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 22 [2024-11-28 03:29:23,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:29:23,528 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2024-11-28 03:29:23,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 03:29:23,528 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2024-11-28 03:29:23,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 03:29:23,529 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:29:23,529 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:29:23,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 03:29:23,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:29:23,730 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-28 03:29:23,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:29:23,730 INFO L85 PathProgramCache]: Analyzing trace with hash -70076738, now seen corresponding path program 1 times [2024-11-28 03:29:23,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:29:23,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961769384] [2024-11-28 03:29:23,731 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:29:23,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:29:23,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:29:23,735 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:29:23,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44d7847c-306f-4fc6-b56d-19943688a39c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:29:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:29:23,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 03:29:23,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:29:23,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 03:29:23,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:29:23,954 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:29:23,955 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:29:23,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961769384] [2024-11-28 03:29:23,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961769384] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:29:23,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:29:23,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:29:23,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818835580] [2024-11-28 03:29:23,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:29:23,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:29:23,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:29:23,956 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:29:23,956 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:29:23,957 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 03:29:24,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:29:24,333 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions.