./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/sll-shared-after.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_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/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_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/sll-shared-after.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/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_dee7520c-e919-4fc6-82d8-c109d22fee88/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 5faf2b9991f99879bc04c4df6a221302164ff0866019f72f7b8508bf5bf7cdcb --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 02:20:52,989 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 02:20:53,075 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2024-11-28 02:20:53,086 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 02:20:53,087 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 02:20:53,117 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 02:20:53,118 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 02:20:53,118 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 02:20:53,118 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 02:20:53,119 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 02:20:53,119 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 02:20:53,119 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 02:20:53,119 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 02:20:53,119 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 02:20:53,119 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 02:20:53,119 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 02:20:53,120 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 02:20:53,120 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 02:20:53,120 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 02:20:53,120 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 02:20:53,120 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 02:20:53,120 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 02:20:53,120 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 02:20:53,120 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 02:20:53,120 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 02:20:53,121 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 02:20:53,121 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 02:20:53,121 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:20:53,121 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:20:53,121 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:20:53,121 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:20:53,121 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 02:20:53,121 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:20:53,121 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:20:53,122 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:20:53,122 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:20:53,122 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 02:20:53,122 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 02:20:53,122 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 02:20:53,122 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 02:20:53,122 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 02:20:53,122 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 02:20:53,122 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 02:20:53,122 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 02:20:53,122 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_dee7520c-e919-4fc6-82d8-c109d22fee88/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 -> 5faf2b9991f99879bc04c4df6a221302164ff0866019f72f7b8508bf5bf7cdcb [2024-11-28 02:20:53,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 02:20:53,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 02:20:53,440 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 02:20:53,441 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 02:20:53,442 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 02:20:53,445 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/memsafety-broom/sll-shared-after.i [2024-11-28 02:20:56,450 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/data/9a05ea99f/39c24287bc2e49b99b70f257ea27bbc7/FLAGb22d0036c [2024-11-28 02:20:56,861 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 02:20:56,861 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/sv-benchmarks/c/memsafety-broom/sll-shared-after.i [2024-11-28 02:20:56,884 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/data/9a05ea99f/39c24287bc2e49b99b70f257ea27bbc7/FLAGb22d0036c [2024-11-28 02:20:57,029 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/data/9a05ea99f/39c24287bc2e49b99b70f257ea27bbc7 [2024-11-28 02:20:57,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 02:20:57,032 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 02:20:57,034 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 02:20:57,034 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 02:20:57,039 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 02:20:57,039 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:20:57" (1/1) ... [2024-11-28 02:20:57,040 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4aa449c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:20:57, skipping insertion in model container [2024-11-28 02:20:57,041 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:20:57" (1/1) ... [2024-11-28 02:20:57,103 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:20:57,391 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:20:57,400 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 02:20:57,453 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:20:57,487 INFO L204 MainTranslator]: Completed translation [2024-11-28 02:20:57,488 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:20:57 WrapperNode [2024-11-28 02:20:57,489 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 02:20:57,490 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 02:20:57,491 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 02:20:57,491 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 02:20:57,501 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:20:57" (1/1) ... [2024-11-28 02:20:57,519 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:20:57" (1/1) ... [2024-11-28 02:20:57,542 INFO L138 Inliner]: procedures = 121, calls = 18, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 63 [2024-11-28 02:20:57,543 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 02:20:57,543 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 02:20:57,543 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 02:20:57,544 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 02:20:57,552 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:20:57" (1/1) ... [2024-11-28 02:20:57,553 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:20:57" (1/1) ... [2024-11-28 02:20:57,556 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:20:57" (1/1) ... [2024-11-28 02:20:57,581 INFO L175 MemorySlicer]: Split 7 memory accesses to 1 slices as follows [7]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 4 writes are split as follows [4]. [2024-11-28 02:20:57,585 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:20:57" (1/1) ... [2024-11-28 02:20:57,586 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:20:57" (1/1) ... [2024-11-28 02:20:57,596 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:20:57" (1/1) ... [2024-11-28 02:20:57,600 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:20:57" (1/1) ... [2024-11-28 02:20:57,606 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:20:57" (1/1) ... [2024-11-28 02:20:57,607 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:20:57" (1/1) ... [2024-11-28 02:20:57,612 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:20:57" (1/1) ... [2024-11-28 02:20:57,615 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 02:20:57,619 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 02:20:57,619 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 02:20:57,619 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 02:20:57,620 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:20:57" (1/1) ... [2024-11-28 02:20:57,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:20:57,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:20:57,660 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 02:20:57,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 02:20:57,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 02:20:57,691 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2024-11-28 02:20:57,691 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2024-11-28 02:20:57,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 02:20:57,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-28 02:20:57,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-28 02:20:57,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 02:20:57,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 02:20:57,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 02:20:57,816 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 02:20:57,819 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 02:20:58,056 INFO L? ?]: Removed 59 outVars from TransFormulas that were not future-live. [2024-11-28 02:20:58,057 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 02:20:58,067 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 02:20:58,067 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-28 02:20:58,068 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:20:58 BoogieIcfgContainer [2024-11-28 02:20:58,068 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 02:20:58,070 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 02:20:58,071 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 02:20:58,079 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 02:20:58,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:20:57" (1/3) ... [2024-11-28 02:20:58,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7166d694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:20:58, skipping insertion in model container [2024-11-28 02:20:58,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:20:57" (2/3) ... [2024-11-28 02:20:58,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7166d694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:20:58, skipping insertion in model container [2024-11-28 02:20:58,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:20:58" (3/3) ... [2024-11-28 02:20:58,081 INFO L128 eAbstractionObserver]: Analyzing ICFG sll-shared-after.i [2024-11-28 02:20:58,099 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 02:20:58,100 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sll-shared-after.i that has 2 procedures, 59 locations, 1 initial locations, 3 loop locations, and 21 error locations. [2024-11-28 02:20:58,155 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 02:20:58,173 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;@4298494d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 02:20:58,173 INFO L334 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2024-11-28 02:20:58,179 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 55 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:20:58,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-28 02:20:58,186 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:20:58,186 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-28 02:20:58,187 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:20:58,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:20:58,192 INFO L85 PathProgramCache]: Analyzing trace with hash 34497980, now seen corresponding path program 1 times [2024-11-28 02:20:58,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:20:58,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966301226] [2024-11-28 02:20:58,202 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:20:58,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:20:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:20:58,499 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 02:20:58,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:20:58,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966301226] [2024-11-28 02:20:58,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966301226] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:20:58,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:20:58,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:20:58,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095394491] [2024-11-28 02:20:58,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:20:58,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:20:58,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:20:58,539 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:20:58,540 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:20:58,543 INFO L87 Difference]: Start difference. First operand has 59 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 55 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 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 02:20:58,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:20:58,638 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2024-11-28 02:20:58,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:20:58,640 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 02:20:58,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:20:58,647 INFO L225 Difference]: With dead ends: 58 [2024-11-28 02:20:58,647 INFO L226 Difference]: Without dead ends: 56 [2024-11-28 02:20:58,649 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 02:20:58,654 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 1 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 94 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 02:20:58,655 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 94 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:20:58,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-28 02:20:58,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-11-28 02:20:58,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 52 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:20:58,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2024-11-28 02:20:58,696 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 5 [2024-11-28 02:20:58,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:20:58,697 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2024-11-28 02:20:58,697 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 02:20:58,698 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2024-11-28 02:20:58,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-28 02:20:58,698 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:20:58,698 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-28 02:20:58,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 02:20:58,699 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:20:58,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:20:58,701 INFO L85 PathProgramCache]: Analyzing trace with hash 34497981, now seen corresponding path program 1 times [2024-11-28 02:20:58,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:20:58,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127013939] [2024-11-28 02:20:58,701 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:20:58,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:20:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:20:58,867 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 02:20:58,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:20:58,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127013939] [2024-11-28 02:20:58,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127013939] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:20:58,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:20:58,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:20:58,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854764525] [2024-11-28 02:20:58,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:20:58,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:20:58,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:20:58,874 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:20:58,874 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:20:58,877 INFO L87 Difference]: Start difference. First operand 56 states and 59 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 02:20:58,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:20:58,937 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2024-11-28 02:20:58,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:20:58,938 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 02:20:58,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:20:58,939 INFO L225 Difference]: With dead ends: 55 [2024-11-28 02:20:58,941 INFO L226 Difference]: Without dead ends: 55 [2024-11-28 02:20:58,941 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 02:20:58,942 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 1 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:20:58,942 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 98 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:20:58,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-28 02:20:58,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-28 02:20:58,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:20:58,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2024-11-28 02:20:58,952 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 5 [2024-11-28 02:20:58,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:20:58,953 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2024-11-28 02:20:58,953 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 02:20:58,953 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2024-11-28 02:20:58,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 02:20:58,954 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:20:58,954 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:20:58,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 02:20:58,955 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:20:58,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:20:58,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1344725642, now seen corresponding path program 1 times [2024-11-28 02:20:58,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:20:58,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273769823] [2024-11-28 02:20:58,956 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:20:58,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:20:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:20:59,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:20:59,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:20:59,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273769823] [2024-11-28 02:20:59,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273769823] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:20:59,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:20:59,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:20:59,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850844452] [2024-11-28 02:20:59,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:20:59,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:20:59,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:20:59,075 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:20:59,075 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:20:59,075 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:20:59,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:20:59,161 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2024-11-28 02:20:59,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:20:59,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-28 02:20:59,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:20:59,162 INFO L225 Difference]: With dead ends: 70 [2024-11-28 02:20:59,162 INFO L226 Difference]: Without dead ends: 70 [2024-11-28 02:20:59,162 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 02:20:59,163 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 27 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:20:59,164 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 69 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:20:59,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-28 02:20:59,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2024-11-28 02:20:59,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 38 states have (on average 1.605263157894737) internal successors, (61), 55 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:20:59,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2024-11-28 02:20:59,169 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 14 [2024-11-28 02:20:59,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:20:59,170 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2024-11-28 02:20:59,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:20:59,171 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2024-11-28 02:20:59,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 02:20:59,171 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:20:59,171 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:20:59,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 02:20:59,172 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:20:59,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:20:59,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1344725641, now seen corresponding path program 1 times [2024-11-28 02:20:59,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:20:59,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307465264] [2024-11-28 02:20:59,172 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:20:59,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:20:59,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:20:59,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:20:59,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:20:59,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307465264] [2024-11-28 02:20:59,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307465264] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:20:59,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:20:59,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:20:59,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646683834] [2024-11-28 02:20:59,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:20:59,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:20:59,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:20:59,295 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:20:59,295 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:20:59,295 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:20:59,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:20:59,353 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2024-11-28 02:20:59,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:20:59,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-28 02:20:59,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:20:59,354 INFO L225 Difference]: With dead ends: 57 [2024-11-28 02:20:59,355 INFO L226 Difference]: Without dead ends: 57 [2024-11-28 02:20:59,355 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 02:20:59,356 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:20:59,356 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 63 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:20:59,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-28 02:20:59,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-11-28 02:20:59,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 53 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:20:59,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2024-11-28 02:20:59,361 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 14 [2024-11-28 02:20:59,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:20:59,362 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2024-11-28 02:20:59,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:20:59,362 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2024-11-28 02:20:59,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 02:20:59,363 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:20:59,363 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:20:59,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 02:20:59,363 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:20:59,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:20:59,364 INFO L85 PathProgramCache]: Analyzing trace with hash 2093905549, now seen corresponding path program 1 times [2024-11-28 02:20:59,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:20:59,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137360678] [2024-11-28 02:20:59,364 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:20:59,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:20:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:20:59,826 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 02:20:59,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:20:59,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137360678] [2024-11-28 02:20:59,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137360678] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:20:59,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591147281] [2024-11-28 02:20:59,826 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:20:59,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:20:59,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:20:59,831 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:20:59,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 02:20:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:20:59,935 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 02:20:59,941 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:20:59,983 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 02:21:00,036 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base 1))) is different from true [2024-11-28 02:21:00,080 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-28 02:21:00,081 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 02:21:00,101 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 02:21:00,102 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:21:00,319 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 02:21:00,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591147281] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:21:00,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:21:00,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 11 [2024-11-28 02:21:00,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758865823] [2024-11-28 02:21:00,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:21:00,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 02:21:00,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:21:00,323 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 02:21:00,324 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=84, Unknown=1, NotChecked=18, Total=132 [2024-11-28 02:21:00,325 INFO L87 Difference]: Start difference. First operand 57 states and 62 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 02:21:00,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:21:00,581 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2024-11-28 02:21:00,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:21:00,581 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 02:21:00,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:21:00,582 INFO L225 Difference]: With dead ends: 62 [2024-11-28 02:21:00,582 INFO L226 Difference]: Without dead ends: 62 [2024-11-28 02:21:00,582 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=101, Unknown=1, NotChecked=20, Total=156 [2024-11-28 02:21:00,583 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 4 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:21:00,583 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 201 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 163 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2024-11-28 02:21:00,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-28 02:21:00,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2024-11-28 02:21:00,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 55 states have internal predecessors, (62), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:21:00,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2024-11-28 02:21:00,592 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 18 [2024-11-28 02:21:00,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:21:00,592 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2024-11-28 02:21:00,592 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 02:21:00,592 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2024-11-28 02:21:00,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 02:21:00,594 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:21:00,595 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:21:00,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 02:21:00,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:21:00,795 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:21:00,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:21:00,796 INFO L85 PathProgramCache]: Analyzing trace with hash 2093905550, now seen corresponding path program 1 times [2024-11-28 02:21:00,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:21:00,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607750441] [2024-11-28 02:21:00,796 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:21:00,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:21:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:21:01,307 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 02:21:01,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:21:01,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607750441] [2024-11-28 02:21:01,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607750441] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:21:01,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510656139] [2024-11-28 02:21:01,309 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:21:01,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:21:01,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:21:01,315 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:21:01,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 02:21:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:21:01,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-28 02:21:01,408 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:21:01,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 02:21:01,440 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 02:21:01,579 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 02:21:01,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:21:01,647 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 02:21:01,664 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 02:21:01,664 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 02:21:01,666 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 02:21:01,667 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:21:01,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510656139] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:21:01,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:21:01,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2024-11-28 02:21:01,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440660927] [2024-11-28 02:21:01,833 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:21:01,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 02:21:01,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:21:01,834 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 02:21:01,836 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=127, Unknown=1, NotChecked=22, Total=182 [2024-11-28 02:21:01,836 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 02:21:02,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:21:02,122 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2024-11-28 02:21:02,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 02:21:02,123 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 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 02:21:02,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:21:02,124 INFO L225 Difference]: With dead ends: 64 [2024-11-28 02:21:02,124 INFO L226 Difference]: Without dead ends: 64 [2024-11-28 02:21:02,124 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=171, Unknown=1, NotChecked=26, Total=240 [2024-11-28 02:21:02,125 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:21:02,125 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 241 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 180 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2024-11-28 02:21:02,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-28 02:21:02,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2024-11-28 02:21:02,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 57 states have internal predecessors, (63), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:21:02,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2024-11-28 02:21:02,130 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 18 [2024-11-28 02:21:02,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:21:02,130 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2024-11-28 02:21:02,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 02:21:02,131 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2024-11-28 02:21:02,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-28 02:21:02,131 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:21:02,131 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:21:02,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 02:21:02,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-28 02:21:02,336 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:21:02,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:21:02,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1561621897, now seen corresponding path program 1 times [2024-11-28 02:21:02,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:21:02,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597235409] [2024-11-28 02:21:02,337 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:21:02,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:21:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:21:02,571 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 02:21:02,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:21:02,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597235409] [2024-11-28 02:21:02,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597235409] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:21:02,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:21:02,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 02:21:02,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939429916] [2024-11-28 02:21:02,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:21:02,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 02:21:02,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:21:02,573 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 02:21:02,573 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:21:02,573 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:21:02,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:21:02,783 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2024-11-28 02:21:02,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 02:21:02,784 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-11-28 02:21:02,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:21:02,785 INFO L225 Difference]: With dead ends: 75 [2024-11-28 02:21:02,785 INFO L226 Difference]: Without dead ends: 75 [2024-11-28 02:21:02,785 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:21:02,786 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 28 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:21:02,786 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 191 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:21:02,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-28 02:21:02,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2024-11-28 02:21:02,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 62 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:21:02,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2024-11-28 02:21:02,791 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 17 [2024-11-28 02:21:02,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:21:02,791 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2024-11-28 02:21:02,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:21:02,792 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2024-11-28 02:21:02,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-28 02:21:02,792 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:21:02,792 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:21:02,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 02:21:02,792 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:21:02,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:21:02,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1561621896, now seen corresponding path program 1 times [2024-11-28 02:21:02,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:21:02,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569432276] [2024-11-28 02:21:02,793 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:21:02,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:21:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:21:03,109 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 02:21:03,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:21:03,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569432276] [2024-11-28 02:21:03,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569432276] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:21:03,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:21:03,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 02:21:03,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456975858] [2024-11-28 02:21:03,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:21:03,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 02:21:03,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:21:03,111 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 02:21:03,111 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:21:03,111 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:21:03,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:21:03,380 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2024-11-28 02:21:03,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:21:03,381 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-11-28 02:21:03,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:21:03,382 INFO L225 Difference]: With dead ends: 76 [2024-11-28 02:21:03,382 INFO L226 Difference]: Without dead ends: 76 [2024-11-28 02:21:03,382 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:21:03,383 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 15 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:21:03,383 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 219 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:21:03,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-28 02:21:03,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2024-11-28 02:21:03,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.4) internal successors, (70), 63 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:21:03,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2024-11-28 02:21:03,388 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 17 [2024-11-28 02:21:03,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:21:03,388 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2024-11-28 02:21:03,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:21:03,388 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2024-11-28 02:21:03,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-28 02:21:03,389 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:21:03,389 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:21:03,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 02:21:03,390 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:21:03,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:21:03,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1774986397, now seen corresponding path program 1 times [2024-11-28 02:21:03,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:21:03,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019440328] [2024-11-28 02:21:03,390 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:21:03,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:21:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:21:03,529 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 02:21:03,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:21:03,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019440328] [2024-11-28 02:21:03,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019440328] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:21:03,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:21:03,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 02:21:03,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396152021] [2024-11-28 02:21:03,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:21:03,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 02:21:03,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:21:03,531 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 02:21:03,531 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:21:03,531 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:21:03,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:21:03,626 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2024-11-28 02:21:03,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:21:03,627 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-11-28 02:21:03,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:21:03,627 INFO L225 Difference]: With dead ends: 71 [2024-11-28 02:21:03,627 INFO L226 Difference]: Without dead ends: 71 [2024-11-28 02:21:03,628 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:21:03,628 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 22 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:21:03,628 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 315 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:21:03,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-28 02:21:03,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2024-11-28 02:21:03,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 64 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:21:03,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2024-11-28 02:21:03,636 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 19 [2024-11-28 02:21:03,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:21:03,637 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2024-11-28 02:21:03,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:21:03,637 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2024-11-28 02:21:03,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-28 02:21:03,638 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:21:03,638 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] [2024-11-28 02:21:03,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 02:21:03,638 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:21:03,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:21:03,638 INFO L85 PathProgramCache]: Analyzing trace with hash -726804770, now seen corresponding path program 1 times [2024-11-28 02:21:03,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:21:03,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394952238] [2024-11-28 02:21:03,639 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:21:03,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:21:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:21:04,334 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 02:21:04,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:21:04,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394952238] [2024-11-28 02:21:04,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394952238] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:21:04,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770940287] [2024-11-28 02:21:04,334 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:21:04,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:21:04,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:21:04,337 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:21:04,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 02:21:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:21:04,432 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-28 02:21:04,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:21:04,443 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 02:21:04,474 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 02:21:04,484 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 02:21:04,702 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 02:21:04,702 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 02:21:04,757 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 02:21:04,776 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 02:21:04,881 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 02:21:04,887 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 02:21:04,911 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 02:21:04,911 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:21:06,266 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:21:06,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2024-11-28 02:21:06,278 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:21:06,278 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 36 treesize of output 32 [2024-11-28 02:21:06,285 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 11 treesize of output 7 [2024-11-28 02:21:06,325 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:21:06,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2024-11-28 02:21:06,328 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:21:06,337 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 02:21:06,337 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 20 treesize of output 11 [2024-11-28 02:21:06,405 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 02:21:06,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770940287] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:21:06,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:21:06,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 31 [2024-11-28 02:21:06,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794729664] [2024-11-28 02:21:06,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:21:06,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 02:21:06,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:21:06,407 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 02:21:06,407 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=835, Unknown=2, NotChecked=0, Total=930 [2024-11-28 02:21:06,407 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 28 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 02:21:07,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:21:07,020 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2024-11-28 02:21:07,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 02:21:07,021 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 28 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2024-11-28 02:21:07,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:21:07,022 INFO L225 Difference]: With dead ends: 72 [2024-11-28 02:21:07,022 INFO L226 Difference]: Without dead ends: 72 [2024-11-28 02:21:07,022 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=123, Invalid=997, Unknown=2, NotChecked=0, Total=1122 [2024-11-28 02:21:07,023 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 22 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:21:07,023 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 506 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 02:21:07,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-28 02:21:07,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2024-11-28 02:21:07,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 66 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:21:07,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2024-11-28 02:21:07,028 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 21 [2024-11-28 02:21:07,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:21:07,028 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2024-11-28 02:21:07,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 28 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 02:21:07,028 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2024-11-28 02:21:07,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-28 02:21:07,029 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:21:07,029 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] [2024-11-28 02:21:07,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 02:21:07,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 02:21:07,234 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:21:07,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:21:07,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1620355594, now seen corresponding path program 1 times [2024-11-28 02:21:07,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:21:07,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488711156] [2024-11-28 02:21:07,234 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:21:07,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:21:07,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:21:07,340 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 02:21:07,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:21:07,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488711156] [2024-11-28 02:21:07,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488711156] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:21:07,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560925062] [2024-11-28 02:21:07,340 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:21:07,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:21:07,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:21:07,343 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:21:07,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 02:21:07,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:21:07,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 02:21:07,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:21:07,449 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 02:21:07,530 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-28 02:21:07,530 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 02:21:07,559 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 02:21:07,559 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:21:07,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560925062] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:21:07,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 02:21:07,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 10 [2024-11-28 02:21:07,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909786467] [2024-11-28 02:21:07,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:21:07,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 02:21:07,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:21:07,560 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 02:21:07,560 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:21:07,560 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:21:07,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:21:07,736 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2024-11-28 02:21:07,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:21:07,737 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2024-11-28 02:21:07,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:21:07,737 INFO L225 Difference]: With dead ends: 73 [2024-11-28 02:21:07,737 INFO L226 Difference]: Without dead ends: 73 [2024-11-28 02:21:07,738 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:21:07,738 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:21:07,738 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 177 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:21:07,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-28 02:21:07,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-11-28 02:21:07,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 68 states have internal predecessors, (76), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:21:07,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2024-11-28 02:21:07,743 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 23 [2024-11-28 02:21:07,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:21:07,743 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2024-11-28 02:21:07,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:21:07,743 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2024-11-28 02:21:07,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-28 02:21:07,744 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:21:07,744 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] [2024-11-28 02:21:07,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 02:21:07,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 02:21:07,945 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:21:07,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:21:07,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1620355595, now seen corresponding path program 1 times [2024-11-28 02:21:07,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:21:07,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216932849] [2024-11-28 02:21:07,945 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:21:07,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:21:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:21:08,188 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 02:21:08,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:21:08,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216932849] [2024-11-28 02:21:08,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216932849] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:21:08,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923393002] [2024-11-28 02:21:08,188 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:21:08,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:21:08,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:21:08,192 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:21:08,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 02:21:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:21:08,281 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 02:21:08,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:21:08,376 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 02:21:08,376 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:21:08,439 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:21:08,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2024-11-28 02:21:08,683 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 02:21:08,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923393002] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:21:08,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:21:08,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 22 [2024-11-28 02:21:08,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825075869] [2024-11-28 02:21:08,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:21:08,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 02:21:08,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:21:08,684 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 02:21:08,685 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2024-11-28 02:21:08,685 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 02:21:08,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:21:08,955 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2024-11-28 02:21:08,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 02:21:08,956 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2024-11-28 02:21:08,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:21:08,957 INFO L225 Difference]: With dead ends: 81 [2024-11-28 02:21:08,957 INFO L226 Difference]: Without dead ends: 81 [2024-11-28 02:21:08,957 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2024-11-28 02:21:08,958 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 40 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:21:08,958 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 501 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:21:08,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-28 02:21:08,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2024-11-28 02:21:08,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 59 states have (on average 1.3389830508474576) internal successors, (79), 71 states have internal predecessors, (79), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:21:08,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2024-11-28 02:21:08,962 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 23 [2024-11-28 02:21:08,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:21:08,962 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2024-11-28 02:21:08,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 02:21:08,963 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2024-11-28 02:21:08,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-28 02:21:08,963 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:21:08,963 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] [2024-11-28 02:21:08,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 02:21:09,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-28 02:21:09,168 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:21:09,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:21:09,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1911328811, now seen corresponding path program 1 times [2024-11-28 02:21:09,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:21:09,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870049030] [2024-11-28 02:21:09,168 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:21:09,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:21:09,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:21:09,288 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 02:21:09,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:21:09,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870049030] [2024-11-28 02:21:09,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870049030] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:21:09,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:21:09,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 02:21:09,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151427758] [2024-11-28 02:21:09,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:21:09,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 02:21:09,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:21:09,290 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 02:21:09,290 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:21:09,291 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:21:09,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:21:09,369 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2024-11-28 02:21:09,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:21:09,369 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2024-11-28 02:21:09,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:21:09,370 INFO L225 Difference]: With dead ends: 74 [2024-11-28 02:21:09,370 INFO L226 Difference]: Without dead ends: 74 [2024-11-28 02:21:09,370 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 02:21:09,371 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 16 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:21:09,372 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 289 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:21:09,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-28 02:21:09,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2024-11-28 02:21:09,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 55 states have (on average 1.309090909090909) internal successors, (72), 67 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:21:09,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2024-11-28 02:21:09,377 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 25 [2024-11-28 02:21:09,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:21:09,377 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2024-11-28 02:21:09,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:21:09,379 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2024-11-28 02:21:09,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-28 02:21:09,379 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:21:09,380 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] [2024-11-28 02:21:09,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 02:21:09,380 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:21:09,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:21:09,383 INFO L85 PathProgramCache]: Analyzing trace with hash 876102880, now seen corresponding path program 1 times [2024-11-28 02:21:09,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:21:09,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778181489] [2024-11-28 02:21:09,383 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:21:09,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:21:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:21:09,520 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 02:21:09,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:21:09,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778181489] [2024-11-28 02:21:09,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778181489] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:21:09,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:21:09,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 02:21:09,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001533648] [2024-11-28 02:21:09,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:21:09,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 02:21:09,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:21:09,521 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 02:21:09,522 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:21:09,523 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:21:09,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:21:09,636 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2024-11-28 02:21:09,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:21:09,636 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-11-28 02:21:09,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:21:09,637 INFO L225 Difference]: With dead ends: 73 [2024-11-28 02:21:09,637 INFO L226 Difference]: Without dead ends: 73 [2024-11-28 02:21:09,637 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 02:21:09,638 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 12 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:21:09,638 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 243 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:21:09,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-28 02:21:09,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-11-28 02:21:09,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 68 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:21:09,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2024-11-28 02:21:09,645 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 26 [2024-11-28 02:21:09,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:21:09,646 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2024-11-28 02:21:09,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:21:09,646 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2024-11-28 02:21:09,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-28 02:21:09,647 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:21:09,647 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 02:21:09,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-28 02:21:09,647 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:21:09,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:21:09,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1148439451, now seen corresponding path program 1 times [2024-11-28 02:21:09,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:21:09,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131066032] [2024-11-28 02:21:09,652 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:21:09,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:21:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:21:09,932 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 02:21:09,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:21:09,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131066032] [2024-11-28 02:21:09,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131066032] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:21:09,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796230965] [2024-11-28 02:21:09,933 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:21:09,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:21:09,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:21:09,935 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:21:09,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 02:21:10,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:21:10,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 02:21:10,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:21:10,053 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 02:21:10,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-28 02:21:10,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2024-11-28 02:21:10,097 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base 1))) is different from true [2024-11-28 02:21:10,122 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-28 02:21:10,122 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 02:21:10,136 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 02:21:10,137 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:21:10,292 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 02:21:10,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796230965] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:21:10,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:21:10,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 13 [2024-11-28 02:21:10,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641018355] [2024-11-28 02:21:10,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:21:10,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 02:21:10,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:21:10,294 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 02:21:10,294 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=126, Unknown=1, NotChecked=22, Total=182 [2024-11-28 02:21:10,295 INFO L87 Difference]: Start difference. First operand 73 states and 79 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 02:21:10,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:21:10,540 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2024-11-28 02:21:10,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 02:21:10,541 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 02:21:10,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:21:10,541 INFO L225 Difference]: With dead ends: 72 [2024-11-28 02:21:10,541 INFO L226 Difference]: Without dead ends: 72 [2024-11-28 02:21:10,542 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=197, Unknown=1, NotChecked=28, Total=272 [2024-11-28 02:21:10,542 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 4 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:21:10,543 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 318 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 235 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2024-11-28 02:21:10,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-28 02:21:10,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-11-28 02:21:10,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 67 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:21:10,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2024-11-28 02:21:10,546 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 30 [2024-11-28 02:21:10,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:21:10,547 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2024-11-28 02:21:10,547 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 02:21:10,547 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2024-11-28 02:21:10,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-28 02:21:10,548 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:21:10,548 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 02:21:10,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 02:21:10,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 02:21:10,749 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:21:10,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:21:10,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1148439450, now seen corresponding path program 1 times [2024-11-28 02:21:10,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:21:10,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496644043] [2024-11-28 02:21:10,750 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:21:10,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:21:10,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:21:11,111 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 02:21:11,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:21:11,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496644043] [2024-11-28 02:21:11,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496644043] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:21:11,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288242239] [2024-11-28 02:21:11,112 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:21:11,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:21:11,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:21:11,116 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:21:11,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 02:21:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:21:11,227 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 02:21:11,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:21:11,243 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 02:21:11,250 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 02:21:11,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-28 02:21:11,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 02:21:11,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2024-11-28 02:21:11,525 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 02:21:11,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:21:11,552 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 02:21:11,563 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 02:21:11,563 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 02:21:11,593 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 02:21:11,593 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:21:11,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288242239] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:21:11,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:21:11,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2024-11-28 02:21:11,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933986539] [2024-11-28 02:21:11,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:21:11,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 02:21:11,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:21:11,727 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 02:21:11,727 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=372, Unknown=1, NotChecked=38, Total=462 [2024-11-28 02:21:11,727 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 02:21:12,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:21:12,248 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2024-11-28 02:21:12,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 02:21:12,249 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 30 [2024-11-28 02:21:12,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:21:12,249 INFO L225 Difference]: With dead ends: 70 [2024-11-28 02:21:12,250 INFO L226 Difference]: Without dead ends: 70 [2024-11-28 02:21:12,250 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=100, Invalid=715, Unknown=1, NotChecked=54, Total=870 [2024-11-28 02:21:12,251 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 7 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:21:12,251 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 529 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 368 Invalid, 0 Unknown, 55 Unchecked, 0.3s Time] [2024-11-28 02:21:12,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-28 02:21:12,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2024-11-28 02:21:12,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 62 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:21:12,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2024-11-28 02:21:12,258 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 30 [2024-11-28 02:21:12,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:21:12,258 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2024-11-28 02:21:12,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 02:21:12,259 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2024-11-28 02:21:12,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-28 02:21:12,259 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:21:12,259 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] [2024-11-28 02:21:12,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 02:21:12,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 02:21:12,460 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:21:12,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:21:12,461 INFO L85 PathProgramCache]: Analyzing trace with hash 689090975, now seen corresponding path program 1 times [2024-11-28 02:21:12,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:21:12,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104317279] [2024-11-28 02:21:12,461 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:21:12,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:21:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:21:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 02:21:12,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:21:12,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104317279] [2024-11-28 02:21:12,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104317279] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:21:12,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902757208] [2024-11-28 02:21:12,601 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:21:12,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:21:12,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:21:12,605 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:21:12,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 02:21:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:21:12,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 02:21:12,721 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:21:12,757 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-28 02:21:12,757 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 02:21:12,774 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 02:21:12,774 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:21:12,815 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 02:21:12,816 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 12 treesize of output 11 [2024-11-28 02:21:12,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 02:21:12,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902757208] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:21:12,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:21:12,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 8 [2024-11-28 02:21:12,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677024090] [2024-11-28 02:21:12,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:21:12,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 02:21:12,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:21:12,833 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 02:21:12,834 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:21:12,834 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:21:12,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:21:12,971 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2024-11-28 02:21:12,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:21:12,972 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2024-11-28 02:21:12,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:21:12,973 INFO L225 Difference]: With dead ends: 88 [2024-11-28 02:21:12,973 INFO L226 Difference]: Without dead ends: 88 [2024-11-28 02:21:12,973 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:21:12,974 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 26 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:21:12,974 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 211 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:21:12,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-28 02:21:12,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2024-11-28 02:21:12,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 74 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:21:12,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2024-11-28 02:21:12,978 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 29 [2024-11-28 02:21:12,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:21:12,979 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2024-11-28 02:21:12,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:21:12,979 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2024-11-28 02:21:12,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-28 02:21:12,980 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:21:12,980 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] [2024-11-28 02:21:12,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 02:21:13,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 02:21:13,184 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:21:13,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:21:13,184 INFO L85 PathProgramCache]: Analyzing trace with hash 689090976, now seen corresponding path program 1 times [2024-11-28 02:21:13,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:21:13,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960062578] [2024-11-28 02:21:13,184 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:21:13,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:21:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:21:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:21:13,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:21:13,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960062578] [2024-11-28 02:21:13,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960062578] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:21:13,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374972431] [2024-11-28 02:21:13,650 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:21:13,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:21:13,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:21:13,652 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:21:13,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 02:21:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:21:13,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-28 02:21:13,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:21:13,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:21:13,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 02:21:13,996 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 02:21:13,996 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 02:21:14,069 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 02:21:14,069 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:21:14,387 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:21:14,387 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 49 treesize of output 53 [2024-11-28 02:21:14,406 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:21:14,406 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 46 treesize of output 64 [2024-11-28 02:21:14,624 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 02:21:14,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374972431] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:21:14,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:21:14,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 27 [2024-11-28 02:21:14,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002051635] [2024-11-28 02:21:14,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:21:14,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 02:21:14,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:21:14,626 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 02:21:14,626 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2024-11-28 02:21:14,626 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 24 states have internal predecessors, (63), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-28 02:21:15,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:21:15,104 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2024-11-28 02:21:15,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 02:21:15,104 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 24 states have internal predecessors, (63), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2024-11-28 02:21:15,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:21:15,105 INFO L225 Difference]: With dead ends: 89 [2024-11-28 02:21:15,105 INFO L226 Difference]: Without dead ends: 89 [2024-11-28 02:21:15,106 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 02:21:15,106 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 44 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:21:15,107 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 477 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:21:15,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-28 02:21:15,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2024-11-28 02:21:15,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 75 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:21:15,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2024-11-28 02:21:15,110 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 29 [2024-11-28 02:21:15,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:21:15,111 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2024-11-28 02:21:15,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 24 states have internal predecessors, (63), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-28 02:21:15,111 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2024-11-28 02:21:15,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-28 02:21:15,112 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:21:15,112 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] [2024-11-28 02:21:15,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 02:21:15,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 02:21:15,313 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:21:15,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:21:15,313 INFO L85 PathProgramCache]: Analyzing trace with hash -535252878, now seen corresponding path program 1 times [2024-11-28 02:21:15,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:21:15,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334298937] [2024-11-28 02:21:15,313 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:21:15,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:21:15,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:21:15,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:21:15,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:21:15,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334298937] [2024-11-28 02:21:15,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334298937] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:21:15,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780600178] [2024-11-28 02:21:15,829 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:21:15,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:21:15,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:21:15,831 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:21:15,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 02:21:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:21:15,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-28 02:21:15,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:21:15,954 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 02:21:15,980 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 02:21:15,986 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 02:21:16,219 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 02:21:16,220 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 02:21:16,272 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 02:21:16,279 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 02:21:16,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:21:16,393 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 02:21:16,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:21:16,400 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 02:21:16,497 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:21:16,497 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 15 [2024-11-28 02:21:16,503 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:21:16,504 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 15 [2024-11-28 02:21:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:21:16,607 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:21:17,955 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:21:17,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-28 02:21:17,960 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 38 treesize of output 34 [2024-11-28 02:21:17,973 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:21:17,974 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 32 treesize of output 34 [2024-11-28 02:21:17,983 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 22 treesize of output 20 [2024-11-28 02:21:18,059 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:21:18,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2024-11-28 02:21:18,064 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:21:18,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-28 02:21:18,080 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 02:21:18,080 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 26 treesize of output 23 [2024-11-28 02:21:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:21:18,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780600178] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:21:18,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:21:18,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2024-11-28 02:21:18,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173324593] [2024-11-28 02:21:18,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:21:18,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-28 02:21:18,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:21:18,145 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-28 02:21:18,146 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1346, Unknown=29, NotChecked=0, Total=1482 [2024-11-28 02:21:18,146 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 36 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 02:21:19,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:21:19,279 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2024-11-28 02:21:19,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 02:21:19,279 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 36 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2024-11-28 02:21:19,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:21:19,280 INFO L225 Difference]: With dead ends: 93 [2024-11-28 02:21:19,280 INFO L226 Difference]: Without dead ends: 93 [2024-11-28 02:21:19,281 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=191, Invalid=2227, Unknown=32, NotChecked=0, Total=2450 [2024-11-28 02:21:19,281 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 38 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:21:19,282 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 546 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 02:21:19,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-28 02:21:19,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2024-11-28 02:21:19,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 87 states have internal predecessors, (98), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:21:19,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 104 transitions. [2024-11-28 02:21:19,285 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 104 transitions. Word has length 29 [2024-11-28 02:21:19,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:21:19,285 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 104 transitions. [2024-11-28 02:21:19,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 36 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 02:21:19,286 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 104 transitions. [2024-11-28 02:21:19,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-28 02:21:19,287 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:21:19,287 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 02:21:19,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 02:21:19,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:21:19,491 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:21:19,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:21:19,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1018133565, now seen corresponding path program 1 times [2024-11-28 02:21:19,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:21:19,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519276696] [2024-11-28 02:21:19,491 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:21:19,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:21:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:21:19,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:21:19,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:21:19,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519276696] [2024-11-28 02:21:19,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519276696] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:21:19,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:21:19,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:21:19,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616276049] [2024-11-28 02:21:19,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:21:19,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:21:19,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:21:19,530 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:21:19,530 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:21:19,530 INFO L87 Difference]: Start difference. First operand 92 states and 104 transitions. Second operand has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:21:19,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:21:19,546 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2024-11-28 02:21:19,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:21:19,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2024-11-28 02:21:19,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:21:19,547 INFO L225 Difference]: With dead ends: 91 [2024-11-28 02:21:19,547 INFO L226 Difference]: Without dead ends: 91 [2024-11-28 02:21:19,548 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 02:21:19,548 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:21:19,548 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 58 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:21:19,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-28 02:21:19,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2024-11-28 02:21:19,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 78 states have (on average 1.2435897435897436) internal successors, (97), 86 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:21:19,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2024-11-28 02:21:19,552 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 31 [2024-11-28 02:21:19,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:21:19,552 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2024-11-28 02:21:19,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:21:19,553 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2024-11-28 02:21:19,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-28 02:21:19,553 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:21:19,553 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] [2024-11-28 02:21:19,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-28 02:21:19,554 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:21:19,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:21:19,554 INFO L85 PathProgramCache]: Analyzing trace with hash 387787270, now seen corresponding path program 1 times [2024-11-28 02:21:19,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:21:19,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320392452] [2024-11-28 02:21:19,554 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:21:19,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:21:19,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:21:20,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:21:20,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:21:20,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320392452] [2024-11-28 02:21:20,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320392452] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:21:20,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783946961] [2024-11-28 02:21:20,227 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:21:20,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:21:20,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:21:20,229 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:21:20,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 02:21:20,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:21:20,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-28 02:21:20,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:21:20,407 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 02:21:20,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-28 02:21:20,649 INFO L349 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2024-11-28 02:21:20,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 45 [2024-11-28 02:21:20,721 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 30 treesize of output 23 [2024-11-28 02:21:20,876 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 37 treesize of output 19 [2024-11-28 02:21:20,896 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 31 treesize of output 13 [2024-11-28 02:21:21,029 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 02:21:21,029 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:21:21,109 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_749 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_main_~data~0#1.base| v_ArrVal_749) |c_ULTIMATE.start_main_~l~0#1.base|) (+ |c_ULTIMATE.start_main_~l~0#1.offset| 8))) 1)) is different from false [2024-11-28 02:21:21,301 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:21:21,302 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2024-11-28 02:21:21,313 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:21:21,313 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 46 treesize of output 45 [2024-11-28 02:21:21,320 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 16 treesize of output 12 [2024-11-28 02:21:22,321 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:21:22,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 237 treesize of output 835 [2024-11-28 02:26:01,330 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 02:26:01,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783946961] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:26:01,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:26:01,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 12] total 34 [2024-11-28 02:26:01,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698681473] [2024-11-28 02:26:01,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:26:01,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-28 02:26:01,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:26:01,332 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-28 02:26:01,332 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1029, Unknown=2, NotChecked=64, Total=1190 [2024-11-28 02:26:01,333 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 31 states have internal predecessors, (69), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 02:26:02,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:26:02,299 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2024-11-28 02:26:02,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 02:26:02,299 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 31 states have internal predecessors, (69), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2024-11-28 02:26:02,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:26:02,300 INFO L225 Difference]: With dead ends: 98 [2024-11-28 02:26:02,300 INFO L226 Difference]: Without dead ends: 98 [2024-11-28 02:26:02,301 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=166, Invalid=1642, Unknown=2, NotChecked=82, Total=1892 [2024-11-28 02:26:02,301 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 27 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 02:26:02,302 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 681 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 737 Invalid, 0 Unknown, 54 Unchecked, 0.6s Time] [2024-11-28 02:26:02,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-28 02:26:02,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2024-11-28 02:26:02,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 81 states have (on average 1.2592592592592593) internal successors, (102), 89 states have internal predecessors, (102), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:26:02,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2024-11-28 02:26:02,310 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 33 [2024-11-28 02:26:02,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:26:02,310 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2024-11-28 02:26:02,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 31 states have internal predecessors, (69), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 02:26:02,310 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2024-11-28 02:26:02,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-28 02:26:02,311 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:26:02,311 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] [2024-11-28 02:26:02,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 02:26:02,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:02,512 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:26:02,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:26:02,512 INFO L85 PathProgramCache]: Analyzing trace with hash 387787271, now seen corresponding path program 1 times [2024-11-28 02:26:02,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:26:02,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523669920] [2024-11-28 02:26:02,512 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:26:02,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:26:02,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:26:03,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:26:03,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:26:03,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523669920] [2024-11-28 02:26:03,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523669920] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:26:03,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653888291] [2024-11-28 02:26:03,787 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:26:03,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:03,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:26:03,789 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:26:03,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 02:26:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:26:03,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-28 02:26:03,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:26:03,985 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 02:26:03,988 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 02:26:04,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 02:26:04,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-28 02:26:04,286 INFO L349 Elim1Store]: treesize reduction 25, result has 45.7 percent of original size [2024-11-28 02:26:04,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2024-11-28 02:26:04,310 INFO L349 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2024-11-28 02:26:04,310 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 22 treesize of output 24 [2024-11-28 02:26:04,360 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 30 treesize of output 23 [2024-11-28 02:26:04,370 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 18 treesize of output 13 [2024-11-28 02:26:04,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-28 02:26:04,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-28 02:26:04,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2024-11-28 02:26:04,564 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 02:26:04,564 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:26:04,807 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~l~0#1.offset| 8))) (and (forall ((v_ArrVal_832 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_main_~data~0#1.base| v_ArrVal_832) |c_ULTIMATE.start_main_~l~0#1.base|) .cse0))) (forall ((v_ArrVal_832 (Array Int Int)) (v_ArrVal_831 (Array Int Int))) (<= (+ 8 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_main_~data~0#1.base| v_ArrVal_832) |c_ULTIMATE.start_main_~l~0#1.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_main_~data~0#1.base| v_ArrVal_831) |c_ULTIMATE.start_main_~l~0#1.base|) .cse0)))))) is different from false [2024-11-28 02:26:05,172 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:26:05,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 49 [2024-11-28 02:26:05,180 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:26:05,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 39 [2024-11-28 02:26:05,192 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:26:05,193 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 68 treesize of output 67 [2024-11-28 02:26:05,207 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:26:05,208 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 108 treesize of output 101 [2024-11-28 02:26:05,219 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 22 treesize of output 18 [2024-11-28 02:26:05,224 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 18 treesize of output 14 [2024-11-28 02:26:05,291 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:26:05,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2024-11-28 02:26:05,301 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:26:05,301 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 40 treesize of output 39 [2024-11-28 02:26:05,307 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 11 treesize of output 7 [2024-11-28 02:26:05,543 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:26:05,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 81 treesize of output 151 [2024-11-28 02:26:06,015 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 02:26:06,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653888291] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:26:06,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:26:06,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 12] total 41 [2024-11-28 02:26:06,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468688418] [2024-11-28 02:26:06,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:26:06,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-28 02:26:06,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:26:06,017 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-28 02:26:06,017 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1532, Unknown=2, NotChecked=78, Total=1722 [2024-11-28 02:26:06,017 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 42 states, 41 states have (on average 1.853658536585366) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 02:26:07,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:26:07,615 INFO L93 Difference]: Finished difference Result 103 states and 118 transitions. [2024-11-28 02:26:07,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 02:26:07,616 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.853658536585366) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2024-11-28 02:26:07,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:26:07,617 INFO L225 Difference]: With dead ends: 103 [2024-11-28 02:26:07,617 INFO L226 Difference]: Without dead ends: 103 [2024-11-28 02:26:07,618 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=221, Invalid=2643, Unknown=2, NotChecked=104, Total=2970 [2024-11-28 02:26:07,620 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 42 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:26:07,620 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 806 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 987 Invalid, 0 Unknown, 55 Unchecked, 0.8s Time] [2024-11-28 02:26:07,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-28 02:26:07,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2024-11-28 02:26:07,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 90 states have internal predecessors, (102), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:26:07,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 108 transitions. [2024-11-28 02:26:07,628 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 108 transitions. Word has length 33 [2024-11-28 02:26:07,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:26:07,628 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 108 transitions. [2024-11-28 02:26:07,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.853658536585366) internal successors, (76), 37 states have internal predecessors, (76), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 02:26:07,629 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 108 transitions. [2024-11-28 02:26:07,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-28 02:26:07,629 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:26:07,629 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] [2024-11-28 02:26:07,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 02:26:07,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:07,830 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:26:07,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:26:07,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1497369561, now seen corresponding path program 1 times [2024-11-28 02:26:07,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:26:07,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873013331] [2024-11-28 02:26:07,831 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:26:07,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:26:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:26:08,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:26:08,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:26:08,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873013331] [2024-11-28 02:26:08,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873013331] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:26:08,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019184516] [2024-11-28 02:26:08,033 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:26:08,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:08,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:26:08,035 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:26:08,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 02:26:08,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:26:08,172 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 02:26:08,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:26:08,178 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 02:26:08,186 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 02:26:08,245 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:26:08,246 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 17 [2024-11-28 02:26:08,301 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 02:26:08,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:26:08,311 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:26:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:26:08,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019184516] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:26:08,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:26:08,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 13 [2024-11-28 02:26:08,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604315666] [2024-11-28 02:26:08,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:26:08,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 02:26:08,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:26:08,474 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 02:26:08,474 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-28 02:26:08,474 INFO L87 Difference]: Start difference. First operand 95 states and 108 transitions. Second operand has 14 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 02:26:08,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:26:08,732 INFO L93 Difference]: Finished difference Result 94 states and 107 transitions. [2024-11-28 02:26:08,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 02:26:08,732 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2024-11-28 02:26:08,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:26:08,733 INFO L225 Difference]: With dead ends: 94 [2024-11-28 02:26:08,733 INFO L226 Difference]: Without dead ends: 94 [2024-11-28 02:26:08,734 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-11-28 02:26:08,734 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 18 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:26:08,734 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 156 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:26:08,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-28 02:26:08,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2024-11-28 02:26:08,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 82 states have (on average 1.2317073170731707) internal successors, (101), 89 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:26:08,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 107 transitions. [2024-11-28 02:26:08,738 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 107 transitions. Word has length 32 [2024-11-28 02:26:08,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:26:08,738 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 107 transitions. [2024-11-28 02:26:08,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 02:26:08,738 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 107 transitions. [2024-11-28 02:26:08,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-28 02:26:08,739 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:26:08,739 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] [2024-11-28 02:26:08,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 02:26:08,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:08,940 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:26:08,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:26:08,941 INFO L85 PathProgramCache]: Analyzing trace with hash -826183744, now seen corresponding path program 1 times [2024-11-28 02:26:08,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:26:08,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764731957] [2024-11-28 02:26:08,941 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:26:08,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:26:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:26:09,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:26:09,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:26:09,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764731957] [2024-11-28 02:26:09,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764731957] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:26:09,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634127425] [2024-11-28 02:26:09,368 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:26:09,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:09,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:26:09,373 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:26:09,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 02:26:09,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:26:09,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-28 02:26:09,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:26:09,932 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~data~0#1.base_20| Int) (|v_ULTIMATE.start_destroy_~l#1.base_20| Int)) (and (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_~l#1.base_20| 1) |v_ULTIMATE.start_main_~data~0#1.base_20|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_~l#1.base_20|) 0) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_~l#1.base_20| 0) |v_ULTIMATE.start_main_~data~0#1.base_20| 0)))) is different from true [2024-11-28 02:26:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:26:09,933 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:26:10,170 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~data~0#1.base_21| Int) (|v_ULTIMATE.start_create_#t~ret4#1.base_41| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_41|) 0)) (= (store (store |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_41| 0) |v_ULTIMATE.start_main_~data~0#1.base_21| 0) |c_ULTIMATE.start_main_old_#valid#1|) (not (= (select (store |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_41| 1) |v_ULTIMATE.start_main_~data~0#1.base_21|) 0)))) is different from false [2024-11-28 02:26:10,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634127425] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:26:10,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:26:10,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2024-11-28 02:26:10,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830659696] [2024-11-28 02:26:10,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:26:10,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 02:26:10,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:26:10,173 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 02:26:10,173 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=633, Unknown=2, NotChecked=102, Total=812 [2024-11-28 02:26:10,173 INFO L87 Difference]: Start difference. First operand 94 states and 107 transitions. Second operand has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 19 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 02:26:10,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:26:10,592 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2024-11-28 02:26:10,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 02:26:10,593 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 19 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2024-11-28 02:26:10,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:26:10,593 INFO L225 Difference]: With dead ends: 104 [2024-11-28 02:26:10,593 INFO L226 Difference]: Without dead ends: 82 [2024-11-28 02:26:10,594 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=684, Unknown=2, NotChecked=106, Total=870 [2024-11-28 02:26:10,594 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:26:10,594 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 308 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 431 Invalid, 0 Unknown, 72 Unchecked, 0.4s Time] [2024-11-28 02:26:10,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-28 02:26:10,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2024-11-28 02:26:10,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 77 states have internal predecessors, (88), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:26:10,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2024-11-28 02:26:10,598 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 33 [2024-11-28 02:26:10,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:26:10,598 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2024-11-28 02:26:10,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 19 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 02:26:10,598 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2024-11-28 02:26:10,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 02:26:10,599 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:26:10,599 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 02:26:10,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-28 02:26:10,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:10,803 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:26:10,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:26:10,803 INFO L85 PathProgramCache]: Analyzing trace with hash -998517966, now seen corresponding path program 1 times [2024-11-28 02:26:10,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:26:10,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123989404] [2024-11-28 02:26:10,803 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:26:10,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:26:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:26:10,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 02:26:10,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:26:10,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123989404] [2024-11-28 02:26:10,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123989404] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:26:10,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560431961] [2024-11-28 02:26:10,885 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:26:10,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:10,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:26:10,888 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:26:10,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 02:26:11,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:26:11,038 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 02:26:11,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:26:11,097 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-28 02:26:11,098 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 02:26:11,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:26:11,114 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:26:11,236 INFO L349 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2024-11-28 02:26:11,236 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 30 treesize of output 38 [2024-11-28 02:26:11,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:26:11,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560431961] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:26:11,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:26:11,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2024-11-28 02:26:11,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961825288] [2024-11-28 02:26:11,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:26:11,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 02:26:11,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:26:11,257 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 02:26:11,258 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:26:11,258 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand has 11 states, 10 states have (on average 5.0) internal successors, (50), 11 states have internal predecessors, (50), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 02:26:11,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:26:11,440 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2024-11-28 02:26:11,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 02:26:11,441 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.0) internal successors, (50), 11 states have internal predecessors, (50), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-11-28 02:26:11,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:26:11,441 INFO L225 Difference]: With dead ends: 85 [2024-11-28 02:26:11,441 INFO L226 Difference]: Without dead ends: 85 [2024-11-28 02:26:11,441 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-28 02:26:11,442 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:26:11,442 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 213 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:26:11,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-28 02:26:11,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2024-11-28 02:26:11,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 77 states have internal predecessors, (86), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:26:11,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2024-11-28 02:26:11,448 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 35 [2024-11-28 02:26:11,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:26:11,449 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2024-11-28 02:26:11,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.0) internal successors, (50), 11 states have internal predecessors, (50), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 02:26:11,449 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2024-11-28 02:26:11,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-28 02:26:11,451 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:26:11,451 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:26:11,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 02:26:11,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:11,656 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:26:11,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:26:11,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1864952083, now seen corresponding path program 2 times [2024-11-28 02:26:11,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:26:11,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666452114] [2024-11-28 02:26:11,656 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:26:11,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:26:11,698 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:26:11,698 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:13,257 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:26:13,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:26:13,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666452114] [2024-11-28 02:26:13,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666452114] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:26:13,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619420245] [2024-11-28 02:26:13,257 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:26:13,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:13,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:26:13,261 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:26:13,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 02:26:13,426 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:26:13,426 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:13,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-11-28 02:26:13,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:26:13,440 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 02:26:13,657 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 02:26:13,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 02:26:13,835 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-28 02:26:13,835 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 02:26:13,923 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 26 [2024-11-28 02:26:13,940 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 33 treesize of output 17 [2024-11-28 02:26:14,193 INFO L349 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2024-11-28 02:26:14,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2024-11-28 02:26:14,284 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2024-11-28 02:26:14,285 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 55 treesize of output 50 [2024-11-28 02:26:14,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2024-11-28 02:26:14,438 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 02:26:14,439 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 1 case distinctions, treesize of input 46 treesize of output 32 [2024-11-28 02:26:14,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2024-11-28 02:26:14,667 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 02:26:14,668 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 1 case distinctions, treesize of input 53 treesize of output 35 [2024-11-28 02:26:14,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2024-11-28 02:26:14,769 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:26:14,769 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:26:16,634 INFO L349 Elim1Store]: treesize reduction 15, result has 65.9 percent of original size [2024-11-28 02:26:16,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 323 treesize of output 248 [2024-11-28 02:26:16,736 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:26:16,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 833 treesize of output 819 [2024-11-28 02:26:16,794 INFO L349 Elim1Store]: treesize reduction 37, result has 38.3 percent of original size [2024-11-28 02:26:16,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 559 treesize of output 330 [2024-11-28 02:26:16,826 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:26:16,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 392 treesize of output 344 [2024-11-28 02:26:16,938 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:26:16,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 922 treesize of output 990 [2024-11-28 02:26:16,997 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 447 treesize of output 443 [2024-11-28 02:26:17,057 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:26:17,057 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 471 treesize of output 460 [2024-11-28 02:26:17,102 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 508 treesize of output 468 [2024-11-28 02:26:21,725 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 8 treesize of output 4 [2024-11-28 02:26:22,487 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 02:26:22,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2024-11-28 02:26:23,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 02:26:23,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 02:26:24,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 02:26:32,350 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:26:32,351 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 1764 treesize of output 1758 [2024-11-28 02:26:38,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 02:26:38,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 02:26:39,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 02:26:42,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101 [2024-11-28 02:26:42,189 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/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 02:26:42,190 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-28 02:26:42,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 02:26:42,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-28 02:26:42,391 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_dee7520c-e919-4fc6-82d8-c109d22fee88/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.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:275) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:499) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:484) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:590) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:728) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:234) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:360) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:267) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:325) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:181) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:428) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:314) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:275) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:132) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 69 more [2024-11-28 02:26:42,397 INFO L158 Benchmark]: Toolchain (without parser) took 345364.65ms. Allocated memory was 117.4MB in the beginning and 528.5MB in the end (delta: 411.0MB). Free memory was 90.4MB in the beginning and 254.6MB in the end (delta: -164.2MB). Peak memory consumption was 888.3MB. Max. memory is 16.1GB. [2024-11-28 02:26:42,397 INFO L158 Benchmark]: CDTParser took 0.40ms. Allocated memory is still 117.4MB. Free memory is still 72.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 02:26:42,397 INFO L158 Benchmark]: CACSL2BoogieTranslator took 455.81ms. Allocated memory is still 117.4MB. Free memory was 90.2MB in the beginning and 71.4MB in the end (delta: 18.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 02:26:42,397 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.46ms. Allocated memory is still 117.4MB. Free memory was 71.4MB in the beginning and 70.0MB in the end (delta: 1.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 02:26:42,397 INFO L158 Benchmark]: Boogie Preprocessor took 74.79ms. Allocated memory is still 117.4MB. Free memory was 69.8MB in the beginning and 67.9MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 02:26:42,398 INFO L158 Benchmark]: RCFGBuilder took 449.21ms. Allocated memory is still 117.4MB. Free memory was 67.9MB in the beginning and 52.2MB in the end (delta: 15.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 02:26:42,398 INFO L158 Benchmark]: TraceAbstraction took 344325.69ms. Allocated memory was 117.4MB in the beginning and 528.5MB in the end (delta: 411.0MB). Free memory was 51.6MB in the beginning and 254.6MB in the end (delta: -203.0MB). Peak memory consumption was 846.4MB. Max. memory is 16.1GB. [2024-11-28 02:26:42,399 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40ms. Allocated memory is still 117.4MB. Free memory is still 72.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 455.81ms. Allocated memory is still 117.4MB. Free memory was 90.2MB in the beginning and 71.4MB in the end (delta: 18.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.46ms. Allocated memory is still 117.4MB. Free memory was 71.4MB in the beginning and 70.0MB in the end (delta: 1.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 74.79ms. Allocated memory is still 117.4MB. Free memory was 69.8MB in the beginning and 67.9MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 449.21ms. Allocated memory is still 117.4MB. Free memory was 67.9MB in the beginning and 52.2MB in the end (delta: 15.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 344325.69ms. Allocated memory was 117.4MB in the beginning and 528.5MB in the end (delta: 411.0MB). Free memory was 51.6MB in the beginning and 254.6MB in the end (delta: -203.0MB). Peak memory consumption was 846.4MB. 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_dee7520c-e919-4fc6-82d8-c109d22fee88/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_dee7520c-e919-4fc6-82d8-c109d22fee88/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_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/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_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/sll-shared-after.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/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_dee7520c-e919-4fc6-82d8-c109d22fee88/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 5faf2b9991f99879bc04c4df6a221302164ff0866019f72f7b8508bf5bf7cdcb --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 02:26:44,798 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 02:26:44,882 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Bitvector.epf [2024-11-28 02:26:44,888 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 02:26:44,888 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 02:26:44,922 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 02:26:44,923 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 02:26:44,923 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 02:26:44,923 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 02:26:44,924 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 02:26:44,924 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 02:26:44,924 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 02:26:44,924 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 02:26:44,924 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 02:26:44,925 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 02:26:44,925 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 02:26:44,925 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 02:26:44,925 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 02:26:44,929 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 02:26:44,929 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 02:26:44,929 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 02:26:44,930 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 02:26:44,930 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 02:26:44,930 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-28 02:26:44,930 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-28 02:26:44,930 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 02:26:44,930 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 02:26:44,930 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 02:26:44,933 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 02:26:44,934 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:26:44,934 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:26:44,934 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:26:44,934 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:26:44,934 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 02:26:44,934 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:26:44,934 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:26:44,934 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:26:44,934 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:26:44,934 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 02:26:44,934 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 02:26:44,935 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-28 02:26:44,935 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-28 02:26:44,935 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 02:26:44,935 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 02:26:44,935 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 02:26:44,935 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 02:26:44,935 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_dee7520c-e919-4fc6-82d8-c109d22fee88/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 -> 5faf2b9991f99879bc04c4df6a221302164ff0866019f72f7b8508bf5bf7cdcb [2024-11-28 02:26:45,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 02:26:45,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 02:26:45,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 02:26:45,254 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 02:26:45,254 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 02:26:45,257 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/memsafety-broom/sll-shared-after.i [2024-11-28 02:26:48,322 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/data/bba7705f8/3d6f5be1603541bb8b176a9fc0951613/FLAG90c1a097d [2024-11-28 02:26:48,648 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 02:26:48,649 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/sv-benchmarks/c/memsafety-broom/sll-shared-after.i [2024-11-28 02:26:48,671 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/data/bba7705f8/3d6f5be1603541bb8b176a9fc0951613/FLAG90c1a097d [2024-11-28 02:26:48,686 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/data/bba7705f8/3d6f5be1603541bb8b176a9fc0951613 [2024-11-28 02:26:48,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 02:26:48,691 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 02:26:48,692 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 02:26:48,692 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 02:26:48,697 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 02:26:48,698 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:26:48" (1/1) ... [2024-11-28 02:26:48,699 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bba1f94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:26:48, skipping insertion in model container [2024-11-28 02:26:48,699 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:26:48" (1/1) ... [2024-11-28 02:26:48,753 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:26:49,107 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:26:49,122 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 02:26:49,206 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:26:49,248 INFO L204 MainTranslator]: Completed translation [2024-11-28 02:26:49,249 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:26:49 WrapperNode [2024-11-28 02:26:49,250 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 02:26:49,251 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 02:26:49,251 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 02:26:49,251 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 02:26:49,260 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:26:49" (1/1) ... [2024-11-28 02:26:49,286 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:26:49" (1/1) ... [2024-11-28 02:26:49,320 INFO L138 Inliner]: procedures = 122, calls = 18, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 62 [2024-11-28 02:26:49,321 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 02:26:49,322 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 02:26:49,323 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 02:26:49,323 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 02:26:49,332 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:26:49" (1/1) ... [2024-11-28 02:26:49,333 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:26:49" (1/1) ... [2024-11-28 02:26:49,337 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:26:49" (1/1) ... [2024-11-28 02:26:49,367 INFO L175 MemorySlicer]: Split 7 memory accesses to 1 slices as follows [7]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 4 writes are split as follows [4]. [2024-11-28 02:26:49,367 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:26:49" (1/1) ... [2024-11-28 02:26:49,367 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:26:49" (1/1) ... [2024-11-28 02:26:49,382 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:26:49" (1/1) ... [2024-11-28 02:26:49,386 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:26:49" (1/1) ... [2024-11-28 02:26:49,391 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:26:49" (1/1) ... [2024-11-28 02:26:49,393 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:26:49" (1/1) ... [2024-11-28 02:26:49,394 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:26:49" (1/1) ... [2024-11-28 02:26:49,400 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 02:26:49,401 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 02:26:49,402 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 02:26:49,404 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 02:26:49,405 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:26:49" (1/1) ... [2024-11-28 02:26:49,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:26:49,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:26:49,446 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 02:26:49,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 02:26:49,482 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2024-11-28 02:26:49,483 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2024-11-28 02:26:49,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 02:26:49,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-28 02:26:49,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-28 02:26:49,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-28 02:26:49,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 02:26:49,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 02:26:49,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 02:26:49,643 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 02:26:49,645 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 02:26:50,158 INFO L? ?]: Removed 59 outVars from TransFormulas that were not future-live. [2024-11-28 02:26:50,158 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 02:26:50,171 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 02:26:50,172 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-28 02:26:50,173 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:26:50 BoogieIcfgContainer [2024-11-28 02:26:50,173 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 02:26:50,175 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 02:26:50,177 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 02:26:50,183 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 02:26:50,183 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:26:48" (1/3) ... [2024-11-28 02:26:50,184 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b599899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:26:50, skipping insertion in model container [2024-11-28 02:26:50,185 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:26:49" (2/3) ... [2024-11-28 02:26:50,185 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b599899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:26:50, skipping insertion in model container [2024-11-28 02:26:50,185 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:26:50" (3/3) ... [2024-11-28 02:26:50,188 INFO L128 eAbstractionObserver]: Analyzing ICFG sll-shared-after.i [2024-11-28 02:26:50,203 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 02:26:50,204 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sll-shared-after.i that has 2 procedures, 59 locations, 1 initial locations, 3 loop locations, and 21 error locations. [2024-11-28 02:26:50,244 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 02:26:50,259 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;@7ceb23ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 02:26:50,259 INFO L334 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2024-11-28 02:26:50,263 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 55 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:26:50,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-28 02:26:50,268 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:26:50,269 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-28 02:26:50,269 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:26:50,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:26:50,273 INFO L85 PathProgramCache]: Analyzing trace with hash 34497980, now seen corresponding path program 1 times [2024-11-28 02:26:50,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:26:50,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063249449] [2024-11-28 02:26:50,285 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:26:50,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:50,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:26:50,289 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:26:50,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 02:26:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:26:50,394 INFO L256 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 02:26:50,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:26:50,461 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 02:26:50,489 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 02:26:50,489 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:26:50,490 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:26:50,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063249449] [2024-11-28 02:26:50,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063249449] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:26:50,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:26:50,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:26:50,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681031949] [2024-11-28 02:26:50,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:26:50,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:26:50,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:26:50,522 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:26:50,522 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:26:50,524 INFO L87 Difference]: Start difference. First operand has 59 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 55 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 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 02:26:50,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:26:50,689 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2024-11-28 02:26:50,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:26:50,693 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 02:26:50,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:26:50,702 INFO L225 Difference]: With dead ends: 58 [2024-11-28 02:26:50,703 INFO L226 Difference]: Without dead ends: 56 [2024-11-28 02:26:50,706 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 02:26:50,710 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 1 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 94 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 02:26:50,711 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 94 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:26:50,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-28 02:26:50,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-11-28 02:26:50,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 52 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:26:50,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2024-11-28 02:26:50,758 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 5 [2024-11-28 02:26:50,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:26:50,759 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2024-11-28 02:26:50,759 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 02:26:50,759 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2024-11-28 02:26:50,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-28 02:26:50,760 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:26:50,760 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-28 02:26:50,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 02:26:50,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:50,961 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:26:50,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:26:50,962 INFO L85 PathProgramCache]: Analyzing trace with hash 34497981, now seen corresponding path program 1 times [2024-11-28 02:26:50,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:26:50,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1879778286] [2024-11-28 02:26:50,962 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:26:50,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:50,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:26:50,965 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:26:50,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 02:26:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:26:51,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 02:26:51,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:26:51,066 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 02:26:51,095 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 02:26:51,095 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:26:51,095 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:26:51,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879778286] [2024-11-28 02:26:51,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879778286] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:26:51,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:26:51,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:26:51,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330300331] [2024-11-28 02:26:51,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:26:51,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:26:51,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:26:51,099 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:26:51,099 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:26:51,099 INFO L87 Difference]: Start difference. First operand 56 states and 59 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 02:26:51,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:26:51,280 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2024-11-28 02:26:51,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:26:51,282 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 02:26:51,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:26:51,283 INFO L225 Difference]: With dead ends: 55 [2024-11-28 02:26:51,283 INFO L226 Difference]: Without dead ends: 55 [2024-11-28 02:26:51,283 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 02:26:51,284 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 1 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:26:51,286 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 98 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:26:51,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-28 02:26:51,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-28 02:26:51,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:26:51,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2024-11-28 02:26:51,293 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 5 [2024-11-28 02:26:51,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:26:51,294 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2024-11-28 02:26:51,294 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 02:26:51,330 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2024-11-28 02:26:51,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 02:26:51,330 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:26:51,330 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:26:51,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 02:26:51,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:51,531 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:26:51,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:26:51,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1344725642, now seen corresponding path program 1 times [2024-11-28 02:26:51,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:26:51,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2057333393] [2024-11-28 02:26:51,533 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:26:51,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:51,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:26:51,537 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:26:51,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 02:26:51,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:26:51,654 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 02:26:51,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:26:51,674 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 02:26:51,691 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 02:26:51,692 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:26:51,693 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:26:51,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057333393] [2024-11-28 02:26:51,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057333393] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:26:51,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:26:51,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:26:51,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8918578] [2024-11-28 02:26:51,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:26:51,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:26:51,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:26:51,695 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:26:51,695 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:26:51,696 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:26:51,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:26:51,865 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2024-11-28 02:26:51,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:26:51,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-28 02:26:51,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:26:51,867 INFO L225 Difference]: With dead ends: 70 [2024-11-28 02:26:51,867 INFO L226 Difference]: Without dead ends: 70 [2024-11-28 02:26:51,867 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:26:51,868 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 27 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:26:51,869 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 69 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:26:51,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-28 02:26:51,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2024-11-28 02:26:51,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 38 states have (on average 1.605263157894737) internal successors, (61), 55 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:26:51,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2024-11-28 02:26:51,875 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 14 [2024-11-28 02:26:51,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:26:51,877 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2024-11-28 02:26:51,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:26:51,877 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2024-11-28 02:26:51,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 02:26:51,878 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:26:51,878 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:26:51,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 02:26:52,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:52,079 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:26:52,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:26:52,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1344725641, now seen corresponding path program 1 times [2024-11-28 02:26:52,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:26:52,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939145682] [2024-11-28 02:26:52,080 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:26:52,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:52,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:26:52,088 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:26:52,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 02:26:52,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:26:52,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 02:26:52,191 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:26:52,214 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 02:26:52,234 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 02:26:52,236 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:26:52,236 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:26:52,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939145682] [2024-11-28 02:26:52,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939145682] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:26:52,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:26:52,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:26:52,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342182445] [2024-11-28 02:26:52,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:26:52,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:26:52,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:26:52,239 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:26:52,240 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:26:52,241 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:26:52,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:26:52,394 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2024-11-28 02:26:52,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:26:52,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-28 02:26:52,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:26:52,396 INFO L225 Difference]: With dead ends: 57 [2024-11-28 02:26:52,396 INFO L226 Difference]: Without dead ends: 57 [2024-11-28 02:26:52,396 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:26:52,397 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:26:52,397 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 63 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:26:52,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-28 02:26:52,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-11-28 02:26:52,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 53 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:26:52,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2024-11-28 02:26:52,408 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 14 [2024-11-28 02:26:52,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:26:52,408 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2024-11-28 02:26:52,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:26:52,409 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2024-11-28 02:26:52,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 02:26:52,409 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:26:52,410 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:26:52,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 02:26:52,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:52,611 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:26:52,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:26:52,612 INFO L85 PathProgramCache]: Analyzing trace with hash 2093905549, now seen corresponding path program 1 times [2024-11-28 02:26:52,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:26:52,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601728386] [2024-11-28 02:26:52,612 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:26:52,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:52,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:26:52,616 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:26:52,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 02:26:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:26:52,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 02:26:52,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:26:52,973 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 02:26:52,973 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 02:26:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:26:52,984 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:27:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:27:01,404 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:27:01,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601728386] [2024-11-28 02:27:01,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601728386] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:27:01,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:27:01,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2024-11-28 02:27:01,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008264433] [2024-11-28 02:27:01,406 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:27:01,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 02:27:01,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:27:01,407 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 02:27:01,407 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=54, Unknown=1, NotChecked=0, Total=72 [2024-11-28 02:27:01,408 INFO L87 Difference]: Start difference. First operand 57 states and 62 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 02:27:02,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:27:02,315 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2024-11-28 02:27:02,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:27:02,316 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 02:27:02,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:27:02,316 INFO L225 Difference]: With dead ends: 62 [2024-11-28 02:27:02,316 INFO L226 Difference]: Without dead ends: 62 [2024-11-28 02:27:02,317 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=27, Invalid=82, Unknown=1, NotChecked=0, Total=110 [2024-11-28 02:27:02,318 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 4 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:27:02,318 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 225 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 186 Invalid, 1 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 02:27:02,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-28 02:27:02,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2024-11-28 02:27:02,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 55 states have internal predecessors, (62), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:27:02,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2024-11-28 02:27:02,323 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 18 [2024-11-28 02:27:02,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:27:02,323 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2024-11-28 02:27:02,323 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 02:27:02,323 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2024-11-28 02:27:02,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 02:27:02,324 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:27:02,324 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:27:02,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 02:27:02,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:02,529 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:27:02,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:27:02,529 INFO L85 PathProgramCache]: Analyzing trace with hash 2093905550, now seen corresponding path program 1 times [2024-11-28 02:27:02,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:27:02,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662791908] [2024-11-28 02:27:02,530 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:27:02,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:02,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:27:02,532 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:27:02,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 02:27:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:27:02,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 02:27:02,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:27:02,629 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 02:27:02,641 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 02:27:03,062 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base (_ BitVec 64))) (and (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_~pi~0.base)))) is different from true [2024-11-28 02:27:03,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:27:03,152 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 02:27:03,177 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 02:27:03,177 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 02:27:03,231 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 02:27:03,231 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:27:07,724 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:27:07,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662791908] [2024-11-28 02:27:07,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662791908] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:27:07,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1101953882] [2024-11-28 02:27:07,725 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:27:07,725 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 02:27:07,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 02:27:07,730 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 02:27:07,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2024-11-28 02:27:07,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:27:07,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 02:27:07,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:27:07,930 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 02:27:07,942 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 02:27:08,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:27:08,249 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 02:27:08,271 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 02:27:08,272 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 02:27:08,285 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 02:27:08,285 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:27:12,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1101953882] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:27:12,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:27:12,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-28 02:27:12,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903641220] [2024-11-28 02:27:12,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:27:12,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 02:27:12,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:27:12,605 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 02:27:12,605 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=69, Unknown=2, NotChecked=16, Total=110 [2024-11-28 02:27:12,605 INFO L87 Difference]: Start difference. First operand 60 states and 68 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 02:27:13,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:27:13,585 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2024-11-28 02:27:13,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 02:27:13,586 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 02:27:13,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:27:13,587 INFO L225 Difference]: With dead ends: 64 [2024-11-28 02:27:13,587 INFO L226 Difference]: Without dead ends: 64 [2024-11-28 02:27:13,587 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=29, Invalid=105, Unknown=2, NotChecked=20, Total=156 [2024-11-28 02:27:13,588 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 3 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:27:13,588 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 195 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 174 Invalid, 0 Unknown, 60 Unchecked, 0.7s Time] [2024-11-28 02:27:13,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-28 02:27:13,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2024-11-28 02:27:13,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 57 states have internal predecessors, (63), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:27:13,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2024-11-28 02:27:13,593 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 18 [2024-11-28 02:27:13,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:27:13,594 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2024-11-28 02:27:13,594 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 02:27:13,594 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2024-11-28 02:27:13,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-28 02:27:13,595 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:27:13,595 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:27:13,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2024-11-28 02:27:13,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 02:27:13,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:14,000 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:27:14,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:27:14,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1561621897, now seen corresponding path program 1 times [2024-11-28 02:27:14,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:27:14,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982008626] [2024-11-28 02:27:14,001 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:27:14,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:14,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:27:14,003 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:27:14,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 02:27:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:27:14,080 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 02:27:14,082 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:27:14,269 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 02:27:14,269 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 02:27:14,363 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 02:27:14,363 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:27:14,363 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:27:14,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982008626] [2024-11-28 02:27:14,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982008626] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:27:14,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:27:14,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 02:27:14,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683609962] [2024-11-28 02:27:14,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:27:14,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 02:27:14,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:27:14,365 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 02:27:14,365 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:27:14,365 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:27:15,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:27:15,048 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2024-11-28 02:27:15,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 02:27:15,049 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-11-28 02:27:15,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:27:15,050 INFO L225 Difference]: With dead ends: 75 [2024-11-28 02:27:15,050 INFO L226 Difference]: Without dead ends: 75 [2024-11-28 02:27:15,052 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:27:15,053 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 15 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 02:27:15,053 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 193 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 02:27:15,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-28 02:27:15,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2024-11-28 02:27:15,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 62 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:27:15,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2024-11-28 02:27:15,058 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 17 [2024-11-28 02:27:15,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:27:15,058 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2024-11-28 02:27:15,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:27:15,058 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2024-11-28 02:27:15,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-28 02:27:15,059 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:27:15,059 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:27:15,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 02:27:15,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:15,259 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:27:15,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:27:15,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1561621896, now seen corresponding path program 1 times [2024-11-28 02:27:15,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:27:15,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977162689] [2024-11-28 02:27:15,260 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:27:15,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:15,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:27:15,262 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:27:15,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 02:27:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:27:15,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 02:27:15,365 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:27:15,373 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 02:27:15,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:27:15,802 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 02:27:15,835 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 02:27:15,835 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 02:27:15,989 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 02:27:15,989 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:27:15,989 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:27:15,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977162689] [2024-11-28 02:27:15,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977162689] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:27:15,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:27:15,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 02:27:15,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627166321] [2024-11-28 02:27:15,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:27:15,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 02:27:15,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:27:15,990 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 02:27:15,990 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:27:15,991 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:27:16,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:27:16,913 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2024-11-28 02:27:16,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:27:16,914 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-11-28 02:27:16,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:27:16,914 INFO L225 Difference]: With dead ends: 76 [2024-11-28 02:27:16,914 INFO L226 Difference]: Without dead ends: 76 [2024-11-28 02:27:16,914 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:27:16,915 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 15 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 02:27:16,915 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 219 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 02:27:16,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-28 02:27:16,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2024-11-28 02:27:16,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.4) internal successors, (70), 63 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:27:16,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2024-11-28 02:27:16,920 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 17 [2024-11-28 02:27:16,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:27:16,921 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2024-11-28 02:27:16,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:27:16,921 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2024-11-28 02:27:16,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-28 02:27:16,922 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:27:16,922 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:27:16,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 02:27:17,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:17,123 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:27:17,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:27:17,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1774986397, now seen corresponding path program 1 times [2024-11-28 02:27:17,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:27:17,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592314030] [2024-11-28 02:27:17,124 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:27:17,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:17,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:27:17,125 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:27:17,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 02:27:17,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:27:17,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 02:27:17,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:27:17,400 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 02:27:17,400 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:27:17,401 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:27:17,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592314030] [2024-11-28 02:27:17,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592314030] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:27:17,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:27:17,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 02:27:17,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163574447] [2024-11-28 02:27:17,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:27:17,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 02:27:17,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:27:17,402 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 02:27:17,402 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:27:17,402 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:27:17,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:27:17,712 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2024-11-28 02:27:17,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:27:17,713 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-11-28 02:27:17,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:27:17,713 INFO L225 Difference]: With dead ends: 71 [2024-11-28 02:27:17,713 INFO L226 Difference]: Without dead ends: 71 [2024-11-28 02:27:17,713 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-28 02:27:17,714 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 22 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:27:17,714 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 315 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:27:17,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-28 02:27:17,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2024-11-28 02:27:17,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 64 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:27:17,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2024-11-28 02:27:17,719 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 19 [2024-11-28 02:27:17,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:27:17,719 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2024-11-28 02:27:17,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:27:17,720 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2024-11-28 02:27:17,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-28 02:27:17,720 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:27:17,720 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] [2024-11-28 02:27:17,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 02:27:17,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:17,921 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:27:17,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:27:17,922 INFO L85 PathProgramCache]: Analyzing trace with hash -726804770, now seen corresponding path program 1 times [2024-11-28 02:27:17,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:27:17,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1179521071] [2024-11-28 02:27:17,922 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:27:17,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:17,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:27:17,924 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:27:17,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 02:27:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:27:18,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 02:27:18,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:27:18,044 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 02:27:18,060 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 02:27:18,503 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 02:27:18,504 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 02:27:18,579 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 02:27:18,587 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 02:27:18,769 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 02:27:18,785 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 02:27:18,944 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 02:27:18,944 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:27:19,242 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv8 64) |c_ULTIMATE.start_main_~l~0#1.offset|))) (and (forall ((v_ArrVal_169 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 64) (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_main_~data~0#1.base| v_ArrVal_169) |c_ULTIMATE.start_main_~l~0#1.base|) .cse0))) (forall ((v_ArrVal_168 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 64) (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_main_~data~0#1.base| v_ArrVal_168) |c_ULTIMATE.start_main_~l~0#1.base|) .cse0))))) is different from false [2024-11-28 02:27:29,076 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2024-11-28 02:27:29,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 1 [2024-11-28 02:27:29,078 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 02:27:29,078 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:27:29,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179521071] [2024-11-28 02:27:29,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179521071] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:27:29,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:27:29,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2024-11-28 02:27:29,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688590325] [2024-11-28 02:27:29,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:27:29,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 02:27:29,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:27:29,079 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 02:27:29,080 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=325, Unknown=10, NotChecked=36, Total=420 [2024-11-28 02:27:29,080 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 19 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 02:27:31,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:27:31,009 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2024-11-28 02:27:31,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 02:27:31,011 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 19 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2024-11-28 02:27:31,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:27:31,012 INFO L225 Difference]: With dead ends: 72 [2024-11-28 02:27:31,012 INFO L226 Difference]: Without dead ends: 72 [2024-11-28 02:27:31,013 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=68, Invalid=432, Unknown=10, NotChecked=42, Total=552 [2024-11-28 02:27:31,013 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:27:31,014 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 515 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 358 Invalid, 0 Unknown, 34 Unchecked, 1.5s Time] [2024-11-28 02:27:31,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-28 02:27:31,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2024-11-28 02:27:31,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 66 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:27:31,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2024-11-28 02:27:31,019 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 21 [2024-11-28 02:27:31,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:27:31,020 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2024-11-28 02:27:31,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 19 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 02:27:31,020 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2024-11-28 02:27:31,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-28 02:27:31,021 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:27:31,021 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] [2024-11-28 02:27:31,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 02:27:31,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:31,222 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:27:31,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:27:31,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1620355594, now seen corresponding path program 1 times [2024-11-28 02:27:31,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:27:31,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [442217728] [2024-11-28 02:27:31,223 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:27:31,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:31,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:27:31,225 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:27:31,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 02:27:31,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:27:31,334 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 02:27:31,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:27:31,428 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 02:27:31,428 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:27:31,496 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-11-28 02:27:31,496 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 16 treesize of output 15 [2024-11-28 02:27:31,524 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 02:27:31,525 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:27:31,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442217728] [2024-11-28 02:27:31,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442217728] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:27:31,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:27:31,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2024-11-28 02:27:31,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19204383] [2024-11-28 02:27:31,526 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:27:31,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:27:31,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:27:31,527 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:27:31,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:27:31,528 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:27:31,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:27:31,925 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2024-11-28 02:27:31,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:27:31,926 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2024-11-28 02:27:31,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:27:31,927 INFO L225 Difference]: With dead ends: 75 [2024-11-28 02:27:31,927 INFO L226 Difference]: Without dead ends: 75 [2024-11-28 02:27:31,927 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:27:31,928 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 12 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:27:31,928 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 118 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:27:31,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-28 02:27:31,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2024-11-28 02:27:31,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 66 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:27:31,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2024-11-28 02:27:31,934 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 23 [2024-11-28 02:27:31,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:27:31,934 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2024-11-28 02:27:31,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:27:31,935 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2024-11-28 02:27:31,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-28 02:27:31,935 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:27:31,936 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] [2024-11-28 02:27:31,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 02:27:32,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:32,136 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:27:32,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:27:32,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1620355595, now seen corresponding path program 1 times [2024-11-28 02:27:32,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:27:32,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891903772] [2024-11-28 02:27:32,137 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:27:32,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:32,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:27:32,140 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:27:32,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 02:27:32,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:27:32,256 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 02:27:32,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:27:32,737 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 02:27:32,738 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:27:33,103 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:27:33,104 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 24 treesize of output 28 [2024-11-28 02:27:34,340 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 02:27:34,340 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:27:34,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891903772] [2024-11-28 02:27:34,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891903772] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:27:34,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:27:34,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2024-11-28 02:27:34,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556721781] [2024-11-28 02:27:34,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:27:34,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 02:27:34,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:27:34,341 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 02:27:34,342 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2024-11-28 02:27:34,342 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 02:27:36,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:27:36,254 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2024-11-28 02:27:36,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 02:27:36,256 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2024-11-28 02:27:36,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:27:36,257 INFO L225 Difference]: With dead ends: 78 [2024-11-28 02:27:36,257 INFO L226 Difference]: Without dead ends: 78 [2024-11-28 02:27:36,257 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2024-11-28 02:27:36,258 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 39 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-28 02:27:36,258 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 314 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-28 02:27:36,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-28 02:27:36,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2024-11-28 02:27:36,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 56 states have (on average 1.3214285714285714) internal successors, (74), 68 states have internal predecessors, (74), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:27:36,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2024-11-28 02:27:36,263 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 23 [2024-11-28 02:27:36,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:27:36,263 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2024-11-28 02:27:36,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 02:27:36,264 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2024-11-28 02:27:36,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-28 02:27:36,265 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:27:36,265 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] [2024-11-28 02:27:36,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 02:27:36,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:36,469 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:27:36,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:27:36,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1911328811, now seen corresponding path program 1 times [2024-11-28 02:27:36,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:27:36,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369714106] [2024-11-28 02:27:36,470 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:27:36,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:36,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:27:36,472 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:27:36,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 02:27:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:27:36,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-28 02:27:36,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:27:36,657 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 02:27:36,657 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:27:36,657 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:27:36,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369714106] [2024-11-28 02:27:36,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369714106] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:27:36,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:27:36,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:27:36,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838898955] [2024-11-28 02:27:36,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:27:36,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:27:36,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:27:36,659 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:27:36,659 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:27:36,659 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:27:36,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:27:36,716 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2024-11-28 02:27:36,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:27:36,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2024-11-28 02:27:36,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:27:36,717 INFO L225 Difference]: With dead ends: 72 [2024-11-28 02:27:36,717 INFO L226 Difference]: Without dead ends: 72 [2024-11-28 02:27:36,718 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 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 02:27:36,718 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 14 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:27:36,719 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 64 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:27:36,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-28 02:27:36,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-11-28 02:27:36,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 67 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:27:36,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2024-11-28 02:27:36,724 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 25 [2024-11-28 02:27:36,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:27:36,724 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2024-11-28 02:27:36,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:27:36,725 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2024-11-28 02:27:36,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-28 02:27:36,725 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:27:36,726 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] [2024-11-28 02:27:36,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 02:27:36,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:36,927 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:27:36,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:27:36,927 INFO L85 PathProgramCache]: Analyzing trace with hash 876102880, now seen corresponding path program 1 times [2024-11-28 02:27:36,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:27:36,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184116332] [2024-11-28 02:27:36,928 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:27:36,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:36,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:27:36,930 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:27:36,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 02:27:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:27:37,116 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 02:27:37,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:27:37,484 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 02:27:37,484 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:27:37,484 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:27:37,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184116332] [2024-11-28 02:27:37,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184116332] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:27:37,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:27:37,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 02:27:37,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198965222] [2024-11-28 02:27:37,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:27:37,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 02:27:37,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:27:37,486 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 02:27:37,486 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:27:37,486 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:27:38,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:27:38,007 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2024-11-28 02:27:38,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:27:38,009 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-11-28 02:27:38,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:27:38,010 INFO L225 Difference]: With dead ends: 73 [2024-11-28 02:27:38,010 INFO L226 Difference]: Without dead ends: 73 [2024-11-28 02:27:38,011 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:27:38,011 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:27:38,012 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 235 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 02:27:38,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-28 02:27:38,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-11-28 02:27:38,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 57 states have (on average 1.280701754385965) internal successors, (73), 68 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:27:38,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2024-11-28 02:27:38,016 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 26 [2024-11-28 02:27:38,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:27:38,017 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2024-11-28 02:27:38,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:27:38,017 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2024-11-28 02:27:38,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-28 02:27:38,018 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:27:38,018 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] [2024-11-28 02:27:38,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 02:27:38,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:38,219 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:27:38,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:27:38,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1459019096, now seen corresponding path program 1 times [2024-11-28 02:27:38,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:27:38,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [295305845] [2024-11-28 02:27:38,220 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:27:38,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:38,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:27:38,222 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:27:38,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 02:27:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:27:38,326 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 02:27:38,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:27:38,586 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 02:27:38,587 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 02:27:38,587 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:27:38,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295305845] [2024-11-28 02:27:38,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295305845] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:27:38,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:27:38,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 02:27:38,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691814058] [2024-11-28 02:27:38,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:27:38,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 02:27:38,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:27:38,589 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 02:27:38,589 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:27:38,589 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:27:38,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:27:38,944 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2024-11-28 02:27:38,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:27:38,946 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2024-11-28 02:27:38,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:27:38,946 INFO L225 Difference]: With dead ends: 70 [2024-11-28 02:27:38,947 INFO L226 Difference]: Without dead ends: 70 [2024-11-28 02:27:38,947 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:27:38,948 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 16 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:27:38,948 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 288 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:27:38,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-28 02:27:38,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2024-11-28 02:27:38,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 64 states have internal predecessors, (68), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:27:38,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2024-11-28 02:27:38,952 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 27 [2024-11-28 02:27:38,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:27:38,953 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2024-11-28 02:27:38,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:27:38,953 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2024-11-28 02:27:38,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-28 02:27:38,954 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:27:38,954 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 02:27:38,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 02:27:39,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:39,155 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:27:39,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:27:39,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1148439451, now seen corresponding path program 1 times [2024-11-28 02:27:39,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:27:39,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [354174757] [2024-11-28 02:27:39,156 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:27:39,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:39,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:27:39,158 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:27:39,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 02:27:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:27:39,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 02:27:39,263 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:27:39,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-28 02:27:39,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-28 02:27:39,697 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 02:27:39,698 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 02:27:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:27:39,704 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:27:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:27:48,160 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:27:48,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354174757] [2024-11-28 02:27:48,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354174757] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:27:48,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:27:48,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2024-11-28 02:27:48,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330677859] [2024-11-28 02:27:48,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:27:48,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 02:27:48,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:27:48,162 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 02:27:48,162 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=88, Unknown=1, NotChecked=0, Total=110 [2024-11-28 02:27:48,162 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:27:49,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:27:49,019 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2024-11-28 02:27:49,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 02:27:49,020 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 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 02:27:49,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:27:49,021 INFO L225 Difference]: With dead ends: 68 [2024-11-28 02:27:49,021 INFO L226 Difference]: Without dead ends: 68 [2024-11-28 02:27:49,021 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=39, Invalid=170, Unknown=1, NotChecked=0, Total=210 [2024-11-28 02:27:49,022 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 4 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:27:49,022 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 252 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 02:27:49,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-28 02:27:49,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-11-28 02:27:49,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 63 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:27:49,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2024-11-28 02:27:49,026 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 30 [2024-11-28 02:27:49,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:27:49,026 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2024-11-28 02:27:49,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 02:27:49,027 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2024-11-28 02:27:49,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-28 02:27:49,028 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:27:49,028 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 02:27:49,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 02:27:49,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:49,229 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:27:49,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:27:49,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1148439450, now seen corresponding path program 1 times [2024-11-28 02:27:49,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:27:49,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668605152] [2024-11-28 02:27:49,230 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:27:49,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:49,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:27:49,236 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:27:49,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 02:27:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:27:49,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 02:27:49,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:27:49,369 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 02:27:49,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-28 02:27:49,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 02:27:49,696 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 16 [2024-11-28 02:27:49,895 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base (_ BitVec 64))) (and (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_~pi~0.base)))) is different from true [2024-11-28 02:27:49,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:27:49,943 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 02:27:49,962 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 02:27:49,962 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 02:27:50,020 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 02:27:50,020 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:27:50,485 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:27:50,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668605152] [2024-11-28 02:27:50,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668605152] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:27:50,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [946928299] [2024-11-28 02:27:50,485 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:27:50,485 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 02:27:50,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 02:27:50,487 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 02:27:50,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2024-11-28 02:27:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:27:50,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 02:27:50,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:27:50,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 02:27:50,761 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 02:27:50,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 02:27:50,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-28 02:27:50,943 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 16 [2024-11-28 02:27:51,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:27:51,074 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 02:27:51,093 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 02:27:51,093 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 02:27:51,103 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 02:27:51,103 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:27:51,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [946928299] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:27:51,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:27:51,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2024-11-28 02:27:51,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175733257] [2024-11-28 02:27:51,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:27:51,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 02:27:51,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:27:51,384 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 02:27:51,385 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=129, Unknown=1, NotChecked=22, Total=182 [2024-11-28 02:27:51,385 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 02:27:52,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:27:52,777 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2024-11-28 02:27:52,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 02:27:52,778 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2024-11-28 02:27:52,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:27:52,779 INFO L225 Difference]: With dead ends: 66 [2024-11-28 02:27:52,779 INFO L226 Difference]: Without dead ends: 66 [2024-11-28 02:27:52,780 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=49, Invalid=226, Unknown=1, NotChecked=30, Total=306 [2024-11-28 02:27:52,780 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 3 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:27:52,780 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 304 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 244 Invalid, 0 Unknown, 54 Unchecked, 1.1s Time] [2024-11-28 02:27:52,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-28 02:27:52,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2024-11-28 02:27:52,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.24) internal successors, (62), 58 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:27:52,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2024-11-28 02:27:52,785 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 30 [2024-11-28 02:27:52,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:27:52,785 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2024-11-28 02:27:52,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 02:27:52,786 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2024-11-28 02:27:52,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-28 02:27:52,787 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:27:52,787 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] [2024-11-28 02:27:52,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-28 02:27:52,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2024-11-28 02:27:53,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-28 02:27:53,188 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:27:53,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:27:53,188 INFO L85 PathProgramCache]: Analyzing trace with hash 689090975, now seen corresponding path program 1 times [2024-11-28 02:27:53,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:27:53,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441111630] [2024-11-28 02:27:53,189 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:27:53,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:53,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:27:53,193 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:27:53,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 02:27:53,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:27:53,320 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 02:27:53,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:27:53,493 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 02:27:53,493 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 02:27:53,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 02:27:53,564 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:27:53,669 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-11-28 02:27:53,669 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 16 treesize of output 15 [2024-11-28 02:27:53,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 02:27:53,711 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:27:53,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441111630] [2024-11-28 02:27:53,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441111630] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:27:53,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:27:53,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2024-11-28 02:27:53,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811174685] [2024-11-28 02:27:53,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:27:53,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:27:53,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:27:53,712 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:27:53,712 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:27:53,712 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:27:54,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:27:54,338 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2024-11-28 02:27:54,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:27:54,339 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2024-11-28 02:27:54,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:27:54,341 INFO L225 Difference]: With dead ends: 84 [2024-11-28 02:27:54,341 INFO L226 Difference]: Without dead ends: 84 [2024-11-28 02:27:54,342 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:27:54,342 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 16 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 02:27:54,342 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 207 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 02:27:54,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-28 02:27:54,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2024-11-28 02:27:54,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 70 states have internal predecessors, (76), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:27:54,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2024-11-28 02:27:54,348 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 29 [2024-11-28 02:27:54,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:27:54,348 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2024-11-28 02:27:54,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 02:27:54,348 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2024-11-28 02:27:54,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-28 02:27:54,351 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:27:54,351 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] [2024-11-28 02:27:54,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-28 02:27:54,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:54,552 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:27:54,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:27:54,552 INFO L85 PathProgramCache]: Analyzing trace with hash 689090976, now seen corresponding path program 1 times [2024-11-28 02:27:54,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:27:54,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201475897] [2024-11-28 02:27:54,552 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:27:54,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:54,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:27:54,554 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:27:54,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 02:27:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:27:54,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 02:27:54,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:27:55,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:27:55,032 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 02:27:55,057 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 02:27:55,058 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 02:27:55,187 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 02:27:55,187 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:27:56,635 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:27:56,635 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 50 treesize of output 54 [2024-11-28 02:27:56,740 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:27:56,740 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 48 treesize of output 72 [2024-11-28 02:27:58,204 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 02:27:58,204 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:27:58,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201475897] [2024-11-28 02:27:58,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201475897] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:27:58,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:27:58,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2024-11-28 02:27:58,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606955899] [2024-11-28 02:27:58,205 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:27:58,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 02:27:58,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:27:58,205 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 02:27:58,206 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2024-11-28 02:27:58,206 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 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 02:28:01,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:28:01,230 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2024-11-28 02:28:01,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 02:28:01,232 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 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 29 [2024-11-28 02:28:01,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:28:01,233 INFO L225 Difference]: With dead ends: 85 [2024-11-28 02:28:01,233 INFO L226 Difference]: Without dead ends: 85 [2024-11-28 02:28:01,234 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2024-11-28 02:28:01,234 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 32 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-28 02:28:01,234 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 470 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-28 02:28:01,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-28 02:28:01,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2024-11-28 02:28:01,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 71 states have internal predecessors, (76), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:28:01,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2024-11-28 02:28:01,239 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 29 [2024-11-28 02:28:01,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:28:01,240 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2024-11-28 02:28:01,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 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 02:28:01,240 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2024-11-28 02:28:01,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-28 02:28:01,241 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:28:01,241 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] [2024-11-28 02:28:01,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 02:28:01,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:28:01,441 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:28:01,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:28:01,442 INFO L85 PathProgramCache]: Analyzing trace with hash -535252878, now seen corresponding path program 1 times [2024-11-28 02:28:01,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:28:01,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337895444] [2024-11-28 02:28:01,442 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:28:01,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:28:01,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:28:01,444 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:28:01,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 02:28:01,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:28:01,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 02:28:01,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:28:01,883 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 8 treesize of output 1 [2024-11-28 02:28:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:28:02,489 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:28:05,649 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-11-28 02:28:05,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2024-11-28 02:28:05,788 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 8 treesize of output 4 [2024-11-28 02:28:05,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:28:05,906 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:28:05,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337895444] [2024-11-28 02:28:05,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337895444] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:28:05,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:28:05,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2024-11-28 02:28:05,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549467389] [2024-11-28 02:28:05,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:28:05,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 02:28:05,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:28:05,908 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 02:28:05,908 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2024-11-28 02:28:05,909 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 02:28:07,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:28:07,267 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2024-11-28 02:28:07,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 02:28:07,268 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2024-11-28 02:28:07,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:28:07,269 INFO L225 Difference]: With dead ends: 89 [2024-11-28 02:28:07,269 INFO L226 Difference]: Without dead ends: 89 [2024-11-28 02:28:07,269 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2024-11-28 02:28:07,270 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 22 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:28:07,270 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 337 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 02:28:07,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-28 02:28:07,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2024-11-28 02:28:07,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 75 states have (on average 1.2266666666666666) internal successors, (92), 83 states have internal predecessors, (92), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:28:07,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2024-11-28 02:28:07,273 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 29 [2024-11-28 02:28:07,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:28:07,273 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2024-11-28 02:28:07,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 02:28:07,274 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2024-11-28 02:28:07,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-28 02:28:07,274 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:28:07,274 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] [2024-11-28 02:28:07,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 02:28:07,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:28:07,475 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:28:07,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:28:07,475 INFO L85 PathProgramCache]: Analyzing trace with hash 387787270, now seen corresponding path program 1 times [2024-11-28 02:28:07,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:28:07,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [711756895] [2024-11-28 02:28:07,475 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:28:07,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:28:07,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:28:07,477 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:28:07,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 02:28:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:28:07,592 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 02:28:07,595 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:28:07,844 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 02:28:08,105 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-11-28 02:28:08,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 44 [2024-11-28 02:28:08,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2024-11-28 02:28:08,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-28 02:28:08,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 02:28:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:28:08,547 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:28:08,833 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_524 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_main_~data~0#1.base| v_ArrVal_524) |c_ULTIMATE.start_main_~l~0#1.base|) (bvadd (_ bv8 64) |c_ULTIMATE.start_main_~l~0#1.offset|)))))) is different from false [2024-11-28 02:28:09,415 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:28:09,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2024-11-28 02:28:09,459 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:28:09,460 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 50 treesize of output 49 [2024-11-28 02:28:09,477 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 18 treesize of output 14 [2024-11-28 02:28:46,811 WARN L286 SmtUtils]: Spent 36.33s on a formula simplification. DAG size of input: 803 DAG size of output: 798 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-28 02:28:46,812 INFO L349 Elim1Store]: treesize reduction 10, result has 99.3 percent of original size [2024-11-28 02:28:46,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 330 treesize of output 1808 [2024-11-28 02:31:45,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:31:45,266 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:31:45,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711756895] [2024-11-28 02:31:45,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711756895] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:31:45,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:31:45,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 26 [2024-11-28 02:31:45,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247926216] [2024-11-28 02:31:45,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:31:45,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 02:31:45,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:31:45,267 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 02:31:45,268 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=574, Unknown=11, NotChecked=48, Total=702 [2024-11-28 02:31:45,268 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (3), 1 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 02:31:48,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:31:48,120 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2024-11-28 02:31:48,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 02:31:48,122 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (3), 1 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 33 [2024-11-28 02:31:48,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:31:48,122 INFO L225 Difference]: With dead ends: 94 [2024-11-28 02:31:48,122 INFO L226 Difference]: Without dead ends: 94 [2024-11-28 02:31:48,122 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=109, Invalid=876, Unknown=11, NotChecked=60, Total=1056 [2024-11-28 02:31:48,123 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 19 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:31:48,123 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 539 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 517 Invalid, 0 Unknown, 52 Unchecked, 2.2s Time] [2024-11-28 02:31:48,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-28 02:31:48,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2024-11-28 02:31:48,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 78 states have (on average 1.2435897435897436) internal successors, (97), 86 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:31:48,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2024-11-28 02:31:48,127 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 33 [2024-11-28 02:31:48,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:31:48,127 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2024-11-28 02:31:48,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (3), 1 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 02:31:48,127 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2024-11-28 02:31:48,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-28 02:31:48,128 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:31:48,128 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] [2024-11-28 02:31:48,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-28 02:31:48,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:31:48,328 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:31:48,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:31:48,329 INFO L85 PathProgramCache]: Analyzing trace with hash 387787271, now seen corresponding path program 1 times [2024-11-28 02:31:48,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:31:48,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506761147] [2024-11-28 02:31:48,329 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:31:48,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:31:48,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:31:48,331 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:31:48,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 02:31:48,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:31:48,467 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-28 02:31:48,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:31:48,591 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 02:31:48,846 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 02:31:48,872 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 02:31:49,228 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-28 02:31:49,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 21 [2024-11-28 02:31:49,297 INFO L349 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2024-11-28 02:31:49,298 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 24 treesize of output 26 [2024-11-28 02:31:49,440 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 26 treesize of output 19 [2024-11-28 02:31:49,459 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 02:31:49,667 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 02:31:49,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-28 02:31:49,711 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 02:31:49,898 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 02:31:49,899 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:31:51,053 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv8 64) |c_ULTIMATE.start_main_~l~0#1.offset|))) (and (forall ((v_ArrVal_568 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_567 (Array (_ BitVec 64) (_ BitVec 64)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_main_~data~0#1.base| v_ArrVal_568) |c_ULTIMATE.start_main_~l~0#1.base|) .cse0) (_ bv8 64)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_main_~data~0#1.base| v_ArrVal_567) |c_ULTIMATE.start_main_~l~0#1.base|) .cse0)))) (forall ((v_ArrVal_568 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_main_~data~0#1.base| v_ArrVal_568) |c_ULTIMATE.start_main_~l~0#1.base|) .cse0))) (bvule .cse1 (bvadd .cse1 (_ bv8 64))))))) is different from false [2024-11-28 02:31:52,967 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:31:52,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 34 [2024-11-28 02:31:53,018 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:31:53,018 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 50 treesize of output 43 [2024-11-28 02:31:53,033 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 17 treesize of output 9 [2024-11-28 02:31:53,177 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:31:53,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 49 [2024-11-28 02:31:53,200 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:31:53,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 39 [2024-11-28 02:31:53,206 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:31:53,263 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:31:53,264 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 36 treesize of output 35 [2024-11-28 02:31:53,270 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 02:31:53,321 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:31:53,322 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 27 treesize of output 26 [2024-11-28 02:31:55,163 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:31:55,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 384 treesize of output 423 [2024-11-28 02:32:05,608 WARN L286 SmtUtils]: Spent 10.41s on a formula simplification. DAG size of input: 356 DAG size of output: 351 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-28 02:32:05,609 INFO L349 Elim1Store]: treesize reduction 10, result has 98.5 percent of original size [2024-11-28 02:32:05,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 319 treesize of output 945 [2024-11-28 02:32:24,548 INFO L349 Elim1Store]: treesize reduction 10, result has 83.6 percent of original size [2024-11-28 02:32:24,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 89 [2024-11-28 02:32:25,084 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 02:32:25,085 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:32:25,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506761147] [2024-11-28 02:32:25,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506761147] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:32:25,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:32:25,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 28 [2024-11-28 02:32:25,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494786070] [2024-11-28 02:32:25,085 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:32:25,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 02:32:25,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:32:25,086 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 02:32:25,086 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=4, NotChecked=52, Total=812 [2024-11-28 02:32:25,086 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 26 states have internal predecessors, (56), 3 states have call successors, (3), 1 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 02:32:32,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:32:32,849 INFO L93 Difference]: Finished difference Result 100 states and 113 transitions. [2024-11-28 02:32:32,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 02:32:32,853 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 26 states have internal predecessors, (56), 3 states have call successors, (3), 1 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 33 [2024-11-28 02:32:32,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:32:32,853 INFO L225 Difference]: With dead ends: 100 [2024-11-28 02:32:32,853 INFO L226 Difference]: Without dead ends: 100 [2024-11-28 02:32:32,854 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=4, NotChecked=62, Total=1122 [2024-11-28 02:32:32,855 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 18 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2024-11-28 02:32:32,856 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 706 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 701 Invalid, 0 Unknown, 55 Unchecked, 6.6s Time] [2024-11-28 02:32:32,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-28 02:32:32,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 92. [2024-11-28 02:32:32,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 87 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:32:32,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2024-11-28 02:32:32,859 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 33 [2024-11-28 02:32:32,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:32:32,860 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2024-11-28 02:32:32,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 26 states have internal predecessors, (56), 3 states have call successors, (3), 1 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 02:32:32,860 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2024-11-28 02:32:32,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-28 02:32:32,860 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:32:32,860 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] [2024-11-28 02:32:32,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 02:32:33,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:32:33,061 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:32:33,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:32:33,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1497369561, now seen corresponding path program 1 times [2024-11-28 02:32:33,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:32:33,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [906362337] [2024-11-28 02:32:33,062 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:32:33,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:32:33,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:32:33,065 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:32:33,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 02:32:33,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:32:33,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 02:32:33,191 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:32:33,321 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 02:32:33,321 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 02:32:33,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2024-11-28 02:32:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:32:33,630 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:32:33,851 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 8 treesize of output 6 [2024-11-28 02:32:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:32:33,938 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:32:33,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906362337] [2024-11-28 02:32:33,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906362337] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:32:33,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:32:33,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2024-11-28 02:32:33,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075588125] [2024-11-28 02:32:33,939 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:32:33,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 02:32:33,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:32:33,940 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 02:32:33,940 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:32:33,940 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:32:34,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:32:34,733 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2024-11-28 02:32:34,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 02:32:34,735 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2024-11-28 02:32:34,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:32:34,735 INFO L225 Difference]: With dead ends: 105 [2024-11-28 02:32:34,735 INFO L226 Difference]: Without dead ends: 105 [2024-11-28 02:32:34,736 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:32:34,736 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 17 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:32:34,736 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 192 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 02:32:34,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-28 02:32:34,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2024-11-28 02:32:34,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 99 states have internal predecessors, (109), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:32:34,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 115 transitions. [2024-11-28 02:32:34,742 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 115 transitions. Word has length 32 [2024-11-28 02:32:34,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:32:34,742 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 115 transitions. [2024-11-28 02:32:34,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 02:32:34,743 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 115 transitions. [2024-11-28 02:32:34,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-28 02:32:34,743 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:32:34,743 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] [2024-11-28 02:32:34,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-28 02:32:34,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:32:34,944 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:32:34,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:32:34,944 INFO L85 PathProgramCache]: Analyzing trace with hash -826183744, now seen corresponding path program 1 times [2024-11-28 02:32:34,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:32:34,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526316750] [2024-11-28 02:32:34,945 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:32:34,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:32:34,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:32:34,947 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:32:34,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 02:32:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:32:35,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 02:32:35,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:32:36,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:32:36,348 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:32:37,099 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~data~0#1.base_20| (_ BitVec 64)) (v_ArrVal_622 (_ BitVec 1))) (or (= |c_ULTIMATE.start_main_old_#valid#1| (store (store |c_#valid| |c_ULTIMATE.start_create_#res#1.base| (_ bv0 1)) |v_ULTIMATE.start_main_~data~0#1.base_20| (_ bv0 1))) (not (= (_ bv0 1) (bvadd (select (store (store |c_#valid| |v_ULTIMATE.start_main_~data~0#1.base_20| v_ArrVal_622) |c_ULTIMATE.start_create_#res#1.base| (_ bv0 1)) |v_ULTIMATE.start_main_~data~0#1.base_20|) (_ bv1 1)))) (= (_ bv0 64) |v_ULTIMATE.start_main_~data~0#1.base_20|) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_~data~0#1.base_20|))))) is different from false [2024-11-28 02:32:37,138 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~data~0#1.base_20| (_ BitVec 64)) (v_ArrVal_622 (_ BitVec 1))) (or (= |c_ULTIMATE.start_main_old_#valid#1| (store (store |c_#valid| |c_ULTIMATE.start_create_~sll~0#1.base| (_ bv0 1)) |v_ULTIMATE.start_main_~data~0#1.base_20| (_ bv0 1))) (not (= (_ bv0 1) (bvadd (_ bv1 1) (select (store (store |c_#valid| |v_ULTIMATE.start_main_~data~0#1.base_20| v_ArrVal_622) |c_ULTIMATE.start_create_~sll~0#1.base| (_ bv0 1)) |v_ULTIMATE.start_main_~data~0#1.base_20|)))) (= (_ bv0 64) |v_ULTIMATE.start_main_~data~0#1.base_20|) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_~data~0#1.base_20|))))) is different from false [2024-11-28 02:32:37,230 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~data~0#1.base_20| (_ BitVec 64)) (v_ArrVal_622 (_ BitVec 1))) (or (not (= (_ bv0 1) (bvadd (_ bv1 1) (select (store (store |c_#valid| |v_ULTIMATE.start_main_~data~0#1.base_20| v_ArrVal_622) |c_ULTIMATE.start_create_#t~ret4#1.base| (_ bv0 1)) |v_ULTIMATE.start_main_~data~0#1.base_20|)))) (= (_ bv0 64) |v_ULTIMATE.start_main_~data~0#1.base_20|) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_~data~0#1.base_20|))) (= |c_ULTIMATE.start_main_old_#valid#1| (store (store |c_#valid| |c_ULTIMATE.start_create_#t~ret4#1.base| (_ bv0 1)) |v_ULTIMATE.start_main_~data~0#1.base_20| (_ bv0 1))))) is different from false [2024-11-28 02:32:37,367 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~data~0#1.base_20| (_ BitVec 64)) (|v_ULTIMATE.start_create_#t~ret4#1.base_43| (_ BitVec 64)) (v_ArrVal_622 (_ BitVec 1))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_43|))) (= |c_ULTIMATE.start_main_old_#valid#1| (store (store |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_43| (_ bv0 1)) |v_ULTIMATE.start_main_~data~0#1.base_20| (_ bv0 1))) (= (_ bv0 64) |v_ULTIMATE.start_main_~data~0#1.base_20|) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_~data~0#1.base_20|))) (not (= (_ bv0 1) (bvadd (_ bv1 1) (select (store (store |c_#valid| |v_ULTIMATE.start_main_~data~0#1.base_20| v_ArrVal_622) |v_ULTIMATE.start_create_#t~ret4#1.base_43| (_ bv0 1)) |v_ULTIMATE.start_main_~data~0#1.base_20|)))))) is different from false [2024-11-28 02:32:37,370 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 02:32:37,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526316750] [2024-11-28 02:32:37,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526316750] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:32:37,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [324851714] [2024-11-28 02:32:37,371 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:32:37,371 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 02:32:37,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 02:32:37,373 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 02:32:37,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2024-11-28 02:32:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:32:37,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 02:32:37,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:32:43,638 WARN L873 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 64))) (exists ((|v_ULTIMATE.start_main_~data~0#1.base_21| (_ BitVec 64)) (|v_ULTIMATE.start_destroy_~l#1.base_25| (_ BitVec 64))) (and (= (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_~l#1.base_25| (_ bv0 1)) |v_ULTIMATE.start_main_~data~0#1.base_21| (_ bv0 1)) |c_#valid|) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_~l#1.base_25|)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~data~0#1.base_21|) (_ bv0 1)) (= (_ bv0 1) (bvadd (_ bv1 1) (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~data~0#1.base_21| (_ bv1 1)) |v_ULTIMATE.start_destroy_~l#1.base_25| (_ bv0 1)) |v_ULTIMATE.start_main_~data~0#1.base_21|))) (not (= (_ bv0 64) |v_ULTIMATE.start_main_~data~0#1.base_21|))))) is different from true [2024-11-28 02:32:43,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:32:43,639 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:32:44,017 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~data~0#1.base_22| (_ BitVec 64)) (v_ArrVal_653 (_ BitVec 1))) (or (not (= (_ bv0 1) (bvadd (_ bv1 1) (select (store (store |c_#valid| |v_ULTIMATE.start_main_~data~0#1.base_22| v_ArrVal_653) |c_ULTIMATE.start_create_#res#1.base| (_ bv0 1)) |v_ULTIMATE.start_main_~data~0#1.base_22|)))) (= |c_ULTIMATE.start_main_old_#valid#1| (store (store |c_#valid| |c_ULTIMATE.start_create_#res#1.base| (_ bv0 1)) |v_ULTIMATE.start_main_~data~0#1.base_22| (_ bv0 1))) (= (_ bv0 64) |v_ULTIMATE.start_main_~data~0#1.base_22|) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_~data~0#1.base_22|))))) is different from false [2024-11-28 02:32:44,045 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~data~0#1.base_22| (_ BitVec 64)) (v_ArrVal_653 (_ BitVec 1))) (or (= |c_ULTIMATE.start_main_old_#valid#1| (store (store |c_#valid| |c_ULTIMATE.start_create_~sll~0#1.base| (_ bv0 1)) |v_ULTIMATE.start_main_~data~0#1.base_22| (_ bv0 1))) (not (= (_ bv0 1) (bvadd (_ bv1 1) (select (store (store |c_#valid| |v_ULTIMATE.start_main_~data~0#1.base_22| v_ArrVal_653) |c_ULTIMATE.start_create_~sll~0#1.base| (_ bv0 1)) |v_ULTIMATE.start_main_~data~0#1.base_22|)))) (= (_ bv0 64) |v_ULTIMATE.start_main_~data~0#1.base_22|) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_~data~0#1.base_22|))))) is different from false [2024-11-28 02:32:44,119 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~data~0#1.base_22| (_ BitVec 64)) (v_ArrVal_653 (_ BitVec 1))) (or (= |c_ULTIMATE.start_main_old_#valid#1| (store (store |c_#valid| |c_ULTIMATE.start_create_#t~ret4#1.base| (_ bv0 1)) |v_ULTIMATE.start_main_~data~0#1.base_22| (_ bv0 1))) (not (= (bvadd (_ bv1 1) (select (store (store |c_#valid| |v_ULTIMATE.start_main_~data~0#1.base_22| v_ArrVal_653) |c_ULTIMATE.start_create_#t~ret4#1.base| (_ bv0 1)) |v_ULTIMATE.start_main_~data~0#1.base_22|)) (_ bv0 1))) (= (_ bv0 64) |v_ULTIMATE.start_main_~data~0#1.base_22|) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_~data~0#1.base_22|))))) is different from false [2024-11-28 02:32:44,208 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_create_#t~ret4#1.base_47| (_ BitVec 64)) (|v_ULTIMATE.start_main_~data~0#1.base_22| (_ BitVec 64)) (v_ArrVal_653 (_ BitVec 1))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_47|))) (= |c_ULTIMATE.start_main_old_#valid#1| (store (store |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_47| (_ bv0 1)) |v_ULTIMATE.start_main_~data~0#1.base_22| (_ bv0 1))) (= (_ bv0 64) |v_ULTIMATE.start_main_~data~0#1.base_22|) (not (= (_ bv0 1) (bvadd (_ bv1 1) (select (store (store |c_#valid| |v_ULTIMATE.start_main_~data~0#1.base_22| v_ArrVal_653) |v_ULTIMATE.start_create_#t~ret4#1.base_47| (_ bv0 1)) |v_ULTIMATE.start_main_~data~0#1.base_22|)))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_~data~0#1.base_22|))))) is different from false [2024-11-28 02:32:44,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [324851714] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:32:44,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 02:32:44,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2024-11-28 02:32:44,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666908269] [2024-11-28 02:32:44,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 02:32:44,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 02:32:44,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 02:32:44,212 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 02:32:44,212 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=640, Unknown=13, NotChecked=522, Total=1260 [2024-11-28 02:32:44,213 INFO L87 Difference]: Start difference. First operand 104 states and 115 transitions. Second operand has 25 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 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 02:32:48,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 02:32:55,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:32:55,036 INFO L93 Difference]: Finished difference Result 105 states and 115 transitions. [2024-11-28 02:32:55,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 02:32:55,037 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 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 33 [2024-11-28 02:32:55,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:32:55,038 INFO L225 Difference]: With dead ends: 105 [2024-11-28 02:32:55,038 INFO L226 Difference]: Without dead ends: 83 [2024-11-28 02:32:55,038 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 9 IntricatePredicates, 1 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=133, Invalid=1149, Unknown=14, NotChecked=684, Total=1980 [2024-11-28 02:32:55,039 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 58 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:32:55,039 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 317 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 487 Invalid, 1 Unknown, 73 Unchecked, 6.0s Time] [2024-11-28 02:32:55,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-28 02:32:55,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2024-11-28 02:32:55,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 78 states have internal predecessors, (87), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 02:32:55,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2024-11-28 02:32:55,042 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 33 [2024-11-28 02:32:55,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:32:55,043 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2024-11-28 02:32:55,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 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 02:32:55,043 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2024-11-28 02:32:55,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-28 02:32:55,043 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:32:55,043 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:32:55,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-28 02:32:55,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2024-11-28 02:32:55,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-28 02:32:55,444 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2024-11-28 02:32:55,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:32:55,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1864952083, now seen corresponding path program 2 times [2024-11-28 02:32:55,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 02:32:55,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1594598413] [2024-11-28 02:32:55,445 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:32:55,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:32:55,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:32:55,448 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:32:55,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dee7520c-e919-4fc6-82d8-c109d22fee88/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 02:32:55,670 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:32:55,671 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:32:55,675 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-28 02:32:55,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:32:55,976 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 02:32:56,002 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 02:32:56,281 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 02:32:56,282 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 02:32:56,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-28 02:32:56,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-28 02:32:57,021 INFO L349 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2024-11-28 02:32:57,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 26 [2024-11-28 02:32:57,219 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2024-11-28 02:32:57,219 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 47 treesize of output 42 [2024-11-28 02:32:57,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2024-11-28 02:32:57,563 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 02:32:57,563 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 1 case distinctions, treesize of input 42 treesize of output 39 [2024-11-28 02:32:57,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2024-11-28 02:32:58,233 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-28 02:32:58,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 49 [2024-11-28 02:32:58,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2024-11-28 02:32:58,689 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:32:58,689 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:33:00,135 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv8 64) |c_ULTIMATE.start_main_~l~0#1.offset|))) (and (forall ((v_ArrVal_706 (Array (_ BitVec 64) (_ BitVec 64))) (|ULTIMATE.start_set_~shared#1.base| (_ BitVec 64)) (v_ArrVal_707 (Array (_ BitVec 64) (_ BitVec 64)))) (= (select (let ((.cse0 (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_main_~data~0#1.base| v_ArrVal_706))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~l~0#1.base|))) (select (store .cse0 |c_ULTIMATE.start_main_~l~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~l~0#1.offset| |ULTIMATE.start_set_~shared#1.base|)) (select .cse1 .cse2)))) (bvadd (_ bv8 64) (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_main_~data~0#1.base| v_ArrVal_707) |c_ULTIMATE.start_main_~l~0#1.base|) .cse2))) (_ bv0 64))) (forall ((v_ArrVal_706 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_709 (_ BitVec 64)) (v_ArrVal_707 (Array (_ BitVec 64) (_ BitVec 64)))) (= (let ((.cse3 (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_main_~data~0#1.base| v_ArrVal_707))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~l~0#1.base|))) (select (select (store .cse3 |c_ULTIMATE.start_main_~l~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~l~0#1.offset| v_ArrVal_709)) (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_main_~data~0#1.base| v_ArrVal_706) |c_ULTIMATE.start_main_~l~0#1.base|) .cse2)) (bvadd (_ bv8 64) (select .cse4 .cse2))))) (_ bv0 64))))) is different from false [2024-11-28 02:33:07,220 INFO L349 Elim1Store]: treesize reduction 15, result has 65.9 percent of original size [2024-11-28 02:33:07,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 305 treesize of output 230 [2024-11-28 02:33:08,500 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:33:08,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 1140 treesize of output 1094 [2024-11-28 02:33:08,834 INFO L349 Elim1Store]: treesize reduction 37, result has 38.3 percent of original size [2024-11-28 02:33:08,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 941 treesize of output 376 [2024-11-28 02:33:09,693 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:33:09,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1352 treesize of output 1366 [2024-11-28 02:33:09,915 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:33:09,915 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 493 treesize of output 484 [2024-11-28 02:33:09,972 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 488 treesize of output 448 [2024-11-28 02:33:10,620 INFO L349 Elim1Store]: treesize reduction 14, result has 80.8 percent of original size [2024-11-28 02:33:10,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 428 treesize of output 474 [2024-11-28 02:33:10,969 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:33:10,970 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 504 treesize of output 472 [2024-11-28 02:33:11,054 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 420 treesize of output 392 [2024-11-28 02:33:43,516 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 8 treesize of output 4 [2024-11-28 02:33:57,398 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-28 02:33:57,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2024-11-28 02:34:26,520 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 11 treesize of output 3 [2024-11-28 02:34:40,235 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 11 treesize of output 3 [2024-11-28 02:34:44,721 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:34:44,722 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 329 treesize of output 323 [2024-11-28 02:34:47,151 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 11 treesize of output 3