./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8688e0efa9d37c2205606fbd307da42d83b0f0e2936dd15336b8b67e136d86b0 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 10:50:52,435 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 10:50:52,488 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-12-02 10:50:52,492 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 10:50:52,492 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 10:50:52,511 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 10:50:52,512 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 10:50:52,512 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 10:50:52,512 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 10:50:52,512 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 10:50:52,512 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 10:50:52,512 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 10:50:52,513 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 10:50:52,513 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 10:50:52,513 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 10:50:52,513 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 10:50:52,513 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 10:50:52,513 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 10:50:52,513 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 10:50:52,513 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 10:50:52,513 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 10:50:52,513 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 10:50:52,514 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 10:50:52,514 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 10:50:52,514 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 10:50:52,514 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 10:50:52,514 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 10:50:52,514 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 10:50:52,514 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 10:50:52,514 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 10:50:52,514 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 10:50:52,514 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 10:50:52,514 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 10:50:52,514 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 10:50:52,514 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 10:50:52,515 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 10:50:52,515 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 10:50:52,515 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 10:50:52,515 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 10:50:52,515 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 10:50:52,515 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 10:50:52,515 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 10:50:52,515 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 10:50:52,515 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 10:50:52,515 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 10:50:52,515 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 10:50:52,515 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 10:50:52,515 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_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8688e0efa9d37c2205606fbd307da42d83b0f0e2936dd15336b8b67e136d86b0 [2024-12-02 10:50:52,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 10:50:52,749 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 10:50:52,751 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 10:50:52,752 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 10:50:52,752 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 10:50:52,753 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i [2024-12-02 10:50:55,440 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/data/7a7cceffe/cf2b022ca5854395b27d84623a2b12a9/FLAG1237abe05 [2024-12-02 10:50:55,651 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 10:50:55,651 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i [2024-12-02 10:50:55,664 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/data/7a7cceffe/cf2b022ca5854395b27d84623a2b12a9/FLAG1237abe05 [2024-12-02 10:50:55,681 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/data/7a7cceffe/cf2b022ca5854395b27d84623a2b12a9 [2024-12-02 10:50:55,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 10:50:55,685 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 10:50:55,687 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 10:50:55,687 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 10:50:55,692 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 10:50:55,693 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 10:50:55" (1/1) ... [2024-12-02 10:50:55,694 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dcc4c78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:50:55, skipping insertion in model container [2024-12-02 10:50:55,694 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 10:50:55" (1/1) ... [2024-12-02 10:50:55,727 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 10:50:56,023 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-12-02 10:50:56,024 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-12-02 10:50:56,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 10:50:56,042 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 10:50:56,083 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 10:50:56,108 INFO L204 MainTranslator]: Completed translation [2024-12-02 10:50:56,108 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:50:56 WrapperNode [2024-12-02 10:50:56,108 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 10:50:56,109 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 10:50:56,109 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 10:50:56,109 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 10:50:56,115 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:50:56" (1/1) ... [2024-12-02 10:50:56,126 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:50:56" (1/1) ... [2024-12-02 10:50:56,147 INFO L138 Inliner]: procedures = 117, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2024-12-02 10:50:56,147 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 10:50:56,148 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 10:50:56,148 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 10:50:56,148 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 10:50:56,159 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:50:56" (1/1) ... [2024-12-02 10:50:56,159 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:50:56" (1/1) ... [2024-12-02 10:50:56,162 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:50:56" (1/1) ... [2024-12-02 10:50:56,177 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [4, 3]. 57 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 5 writes are split as follows [3, 2]. [2024-12-02 10:50:56,178 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:50:56" (1/1) ... [2024-12-02 10:50:56,178 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:50:56" (1/1) ... [2024-12-02 10:50:56,184 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:50:56" (1/1) ... [2024-12-02 10:50:56,184 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:50:56" (1/1) ... [2024-12-02 10:50:56,187 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:50:56" (1/1) ... [2024-12-02 10:50:56,188 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:50:56" (1/1) ... [2024-12-02 10:50:56,189 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:50:56" (1/1) ... [2024-12-02 10:50:56,190 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 10:50:56,191 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 10:50:56,191 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 10:50:56,191 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 10:50:56,192 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:50:56" (1/1) ... [2024-12-02 10:50:56,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 10:50:56,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:50:56,220 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 10:50:56,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 10:50:56,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 10:50:56,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 10:50:56,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 10:50:56,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 10:50:56,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-12-02 10:50:56,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-12-02 10:50:56,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 10:50:56,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 10:50:56,336 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 10:50:56,338 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 10:50:56,565 INFO L? ?]: Removed 57 outVars from TransFormulas that were not future-live. [2024-12-02 10:50:56,566 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 10:50:56,575 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 10:50:56,576 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-12-02 10:50:56,576 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:50:56 BoogieIcfgContainer [2024-12-02 10:50:56,576 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 10:50:56,578 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 10:50:56,578 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 10:50:56,582 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 10:50:56,582 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 10:50:55" (1/3) ... [2024-12-02 10:50:56,586 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ce48b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 10:50:56, skipping insertion in model container [2024-12-02 10:50:56,586 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:50:56" (2/3) ... [2024-12-02 10:50:56,587 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ce48b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 10:50:56, skipping insertion in model container [2024-12-02 10:50:56,587 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:50:56" (3/3) ... [2024-12-02 10:50:56,588 INFO L128 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcat-alloca-2.i [2024-12-02 10:50:56,603 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 10:50:56,605 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG openbsd_cstrcat-alloca-2.i that has 1 procedures, 46 locations, 1 initial locations, 4 loop locations, and 15 error locations. [2024-12-02 10:50:56,643 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 10:50:56,655 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;@57a956b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 10:50:56,655 INFO L334 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-12-02 10:50:56,659 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 30 states have (on average 1.9) internal successors, (57), 45 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:56,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-12-02 10:50:56,663 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:50:56,664 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:50:56,664 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:50:56,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:50:56,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031100, now seen corresponding path program 1 times [2024-12-02 10:50:56,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:50:56,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110640047] [2024-12-02 10:50:56,679 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:50:56,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:50:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:50:56,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:50:56,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:50:56,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110640047] [2024-12-02 10:50:56,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110640047] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:50:56,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:50:56,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 10:50:56,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024759586] [2024-12-02 10:50:56,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:50:56,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 10:50:56,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:50:56,945 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 10:50:56,945 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 10:50:56,954 INFO L87 Difference]: Start difference. First operand has 46 states, 30 states have (on average 1.9) internal successors, (57), 45 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:57,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:50:57,076 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2024-12-02 10:50:57,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 10:50:57,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-12-02 10:50:57,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:50:57,082 INFO L225 Difference]: With dead ends: 66 [2024-12-02 10:50:57,083 INFO L226 Difference]: Without dead ends: 64 [2024-12-02 10:50:57,084 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-12-02 10:50:57,086 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 25 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:50:57,086 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 166 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 10:50:57,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-12-02 10:50:57,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 47. [2024-12-02 10:50:57,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.75) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:57,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2024-12-02 10:50:57,111 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 7 [2024-12-02 10:50:57,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:50:57,111 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2024-12-02 10:50:57,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:57,111 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2024-12-02 10:50:57,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-12-02 10:50:57,112 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:50:57,112 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:50:57,112 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 10:50:57,112 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:50:57,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:50:57,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033022, now seen corresponding path program 1 times [2024-12-02 10:50:57,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:50:57,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189019901] [2024-12-02 10:50:57,113 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:50:57,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:50:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:50:57,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:50:57,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:50:57,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189019901] [2024-12-02 10:50:57,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189019901] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:50:57,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:50:57,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 10:50:57,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062311347] [2024-12-02 10:50:57,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:50:57,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 10:50:57,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:50:57,154 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 10:50:57,155 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 10:50:57,155 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:57,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:50:57,190 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2024-12-02 10:50:57,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 10:50:57,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-12-02 10:50:57,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:50:57,191 INFO L225 Difference]: With dead ends: 48 [2024-12-02 10:50:57,191 INFO L226 Difference]: Without dead ends: 47 [2024-12-02 10:50:57,191 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 [2024-12-02 10:50:57,192 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 3 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:50:57,192 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 75 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:50:57,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-12-02 10:50:57,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2024-12-02 10:50:57,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:57,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2024-12-02 10:50:57,196 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 7 [2024-12-02 10:50:57,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:50:57,196 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2024-12-02 10:50:57,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:57,197 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2024-12-02 10:50:57,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-12-02 10:50:57,197 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:50:57,197 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:50:57,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 10:50:57,197 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:50:57,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:50:57,198 INFO L85 PathProgramCache]: Analyzing trace with hash -531912816, now seen corresponding path program 1 times [2024-12-02 10:50:57,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:50:57,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807110627] [2024-12-02 10:50:57,198 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:50:57,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:50:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:50:57,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:50:57,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:50:57,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807110627] [2024-12-02 10:50:57,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807110627] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:50:57,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:50:57,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 10:50:57,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715119888] [2024-12-02 10:50:57,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:50:57,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 10:50:57,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:50:57,285 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 10:50:57,286 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 10:50:57,286 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:57,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:50:57,308 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2024-12-02 10:50:57,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 10:50:57,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-12-02 10:50:57,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:50:57,309 INFO L225 Difference]: With dead ends: 58 [2024-12-02 10:50:57,309 INFO L226 Difference]: Without dead ends: 58 [2024-12-02 10:50:57,310 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 10:50:57,310 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 13 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:50:57,311 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 101 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:50:57,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-12-02 10:50:57,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2024-12-02 10:50:57,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.696969696969697) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:57,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2024-12-02 10:50:57,315 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 9 [2024-12-02 10:50:57,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:50:57,316 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2024-12-02 10:50:57,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:57,316 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2024-12-02 10:50:57,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-12-02 10:50:57,316 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:50:57,316 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:50:57,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-12-02 10:50:57,317 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:50:57,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:50:57,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1243094546, now seen corresponding path program 1 times [2024-12-02 10:50:57,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:50:57,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712691667] [2024-12-02 10:50:57,318 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:50:57,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:50:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:50:57,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:50:57,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:50:57,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712691667] [2024-12-02 10:50:57,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712691667] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:50:57,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:50:57,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 10:50:57,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144511778] [2024-12-02 10:50:57,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:50:57,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 10:50:57,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:50:57,423 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 10:50:57,424 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 10:50:57,424 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:57,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:50:57,480 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2024-12-02 10:50:57,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 10:50:57,481 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-12-02 10:50:57,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:50:57,482 INFO L225 Difference]: With dead ends: 54 [2024-12-02 10:50:57,482 INFO L226 Difference]: Without dead ends: 54 [2024-12-02 10:50:57,483 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 10:50:57,483 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 2 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:50:57,484 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 170 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:50:57,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-12-02 10:50:57,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2024-12-02 10:50:57,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.696969696969697) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:57,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2024-12-02 10:50:57,489 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 9 [2024-12-02 10:50:57,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:50:57,489 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2024-12-02 10:50:57,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:57,489 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2024-12-02 10:50:57,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-12-02 10:50:57,490 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:50:57,490 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:50:57,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-12-02 10:50:57,490 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:50:57,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:50:57,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1300352848, now seen corresponding path program 1 times [2024-12-02 10:50:57,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:50:57,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187981956] [2024-12-02 10:50:57,491 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:50:57,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:50:57,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:50:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:50:57,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:50:57,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187981956] [2024-12-02 10:50:57,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187981956] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:50:57,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:50:57,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 10:50:57,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533046922] [2024-12-02 10:50:57,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:50:57,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 10:50:57,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:50:57,617 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 10:50:57,618 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 10:50:57,618 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:57,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:50:57,659 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2024-12-02 10:50:57,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 10:50:57,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-12-02 10:50:57,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:50:57,660 INFO L225 Difference]: With dead ends: 46 [2024-12-02 10:50:57,660 INFO L226 Difference]: Without dead ends: 46 [2024-12-02 10:50:57,660 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 [2024-12-02 10:50:57,661 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 16 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:50:57,661 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 55 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:50:57,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-12-02 10:50:57,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-12-02 10:50:57,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:57,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2024-12-02 10:50:57,665 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 9 [2024-12-02 10:50:57,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:50:57,666 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2024-12-02 10:50:57,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:57,666 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2024-12-02 10:50:57,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-12-02 10:50:57,666 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:50:57,666 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:50:57,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-12-02 10:50:57,667 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:50:57,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:50:57,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1300352849, now seen corresponding path program 1 times [2024-12-02 10:50:57,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:50:57,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145636913] [2024-12-02 10:50:57,667 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:50:57,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:50:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:50:57,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:50:57,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:50:57,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145636913] [2024-12-02 10:50:57,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145636913] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:50:57,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:50:57,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 10:50:57,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055066579] [2024-12-02 10:50:57,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:50:57,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 10:50:57,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:50:57,907 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 10:50:57,907 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 10:50:57,908 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:58,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:50:58,026 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2024-12-02 10:50:58,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 10:50:58,027 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-12-02 10:50:58,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:50:58,028 INFO L225 Difference]: With dead ends: 51 [2024-12-02 10:50:58,028 INFO L226 Difference]: Without dead ends: 51 [2024-12-02 10:50:58,028 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-12-02 10:50:58,029 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 48 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:50:58,029 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 107 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 10:50:58,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-12-02 10:50:58,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2024-12-02 10:50:58,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 48 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:58,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2024-12-02 10:50:58,033 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 9 [2024-12-02 10:50:58,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:50:58,034 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2024-12-02 10:50:58,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:58,034 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2024-12-02 10:50:58,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-12-02 10:50:58,034 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:50:58,034 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:50:58,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-12-02 10:50:58,035 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:50:58,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:50:58,035 INFO L85 PathProgramCache]: Analyzing trace with hash -65009352, now seen corresponding path program 1 times [2024-12-02 10:50:58,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:50:58,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681948779] [2024-12-02 10:50:58,035 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:50:58,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:50:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:50:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:50:58,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:50:58,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681948779] [2024-12-02 10:50:58,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681948779] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:50:58,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:50:58,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 10:50:58,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067400869] [2024-12-02 10:50:58,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:50:58,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 10:50:58,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:50:58,080 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 10:50:58,080 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 10:50:58,080 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:58,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:50:58,103 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2024-12-02 10:50:58,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 10:50:58,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-12-02 10:50:58,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:50:58,106 INFO L225 Difference]: With dead ends: 67 [2024-12-02 10:50:58,106 INFO L226 Difference]: Without dead ends: 67 [2024-12-02 10:50:58,107 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 10:50:58,107 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:50:58,108 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 93 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:50:58,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-12-02 10:50:58,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2024-12-02 10:50:58,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:58,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2024-12-02 10:50:58,112 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 11 [2024-12-02 10:50:58,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:50:58,112 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2024-12-02 10:50:58,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:58,112 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2024-12-02 10:50:58,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-12-02 10:50:58,113 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:50:58,113 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:50:58,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-12-02 10:50:58,113 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:50:58,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:50:58,114 INFO L85 PathProgramCache]: Analyzing trace with hash -65007173, now seen corresponding path program 1 times [2024-12-02 10:50:58,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:50:58,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379551414] [2024-12-02 10:50:58,114 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:50:58,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:50:58,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:50:58,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:50:58,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:50:58,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379551414] [2024-12-02 10:50:58,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379551414] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:50:58,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:50:58,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 10:50:58,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275477516] [2024-12-02 10:50:58,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:50:58,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 10:50:58,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:50:58,278 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 10:50:58,278 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 10:50:58,279 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:58,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:50:58,301 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2024-12-02 10:50:58,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 10:50:58,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-12-02 10:50:58,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:50:58,302 INFO L225 Difference]: With dead ends: 77 [2024-12-02 10:50:58,302 INFO L226 Difference]: Without dead ends: 77 [2024-12-02 10:50:58,302 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 10:50:58,303 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 14 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:50:58,303 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 87 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:50:58,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-12-02 10:50:58,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2024-12-02 10:50:58,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 62 states have (on average 1.467741935483871) internal successors, (91), 74 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:58,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2024-12-02 10:50:58,308 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 11 [2024-12-02 10:50:58,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:50:58,308 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2024-12-02 10:50:58,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:58,308 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2024-12-02 10:50:58,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-12-02 10:50:58,308 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:50:58,308 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:50:58,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-12-02 10:50:58,309 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:50:58,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:50:58,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1709998010, now seen corresponding path program 1 times [2024-12-02 10:50:58,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:50:58,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341972085] [2024-12-02 10:50:58,309 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:50:58,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:50:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:50:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:50:58,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:50:58,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341972085] [2024-12-02 10:50:58,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341972085] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:50:58,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:50:58,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 10:50:58,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056375384] [2024-12-02 10:50:58,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:50:58,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 10:50:58,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:50:58,382 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 10:50:58,382 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-12-02 10:50:58,382 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:58,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:50:58,467 INFO L93 Difference]: Finished difference Result 91 states and 108 transitions. [2024-12-02 10:50:58,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 10:50:58,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-12-02 10:50:58,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:50:58,468 INFO L225 Difference]: With dead ends: 91 [2024-12-02 10:50:58,468 INFO L226 Difference]: Without dead ends: 91 [2024-12-02 10:50:58,469 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-12-02 10:50:58,469 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 46 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:50:58,470 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 137 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:50:58,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-12-02 10:50:58,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 74. [2024-12-02 10:50:58,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 73 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:58,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2024-12-02 10:50:58,474 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 11 [2024-12-02 10:50:58,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:50:58,474 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2024-12-02 10:50:58,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:58,475 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2024-12-02 10:50:58,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-12-02 10:50:58,475 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:50:58,475 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:50:58,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-12-02 10:50:58,476 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:50:58,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:50:58,476 INFO L85 PathProgramCache]: Analyzing trace with hash 900651384, now seen corresponding path program 1 times [2024-12-02 10:50:58,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:50:58,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200193741] [2024-12-02 10:50:58,476 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:50:58,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:50:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:50:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:50:58,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:50:58,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200193741] [2024-12-02 10:50:58,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200193741] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:50:58,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:50:58,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 10:50:58,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291087217] [2024-12-02 10:50:58,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:50:58,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 10:50:58,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:50:58,520 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 10:50:58,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 10:50:58,520 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:58,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:50:58,551 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2024-12-02 10:50:58,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 10:50:58,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-12-02 10:50:58,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:50:58,552 INFO L225 Difference]: With dead ends: 72 [2024-12-02 10:50:58,552 INFO L226 Difference]: Without dead ends: 72 [2024-12-02 10:50:58,552 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 [2024-12-02 10:50:58,553 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:50:58,553 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 55 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:50:58,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-12-02 10:50:58,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-12-02 10:50:58,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 61 states have (on average 1.4426229508196722) internal successors, (88), 71 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:58,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2024-12-02 10:50:58,558 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 11 [2024-12-02 10:50:58,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:50:58,558 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2024-12-02 10:50:58,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:58,558 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2024-12-02 10:50:58,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-12-02 10:50:58,559 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:50:58,559 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:50:58,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-12-02 10:50:58,559 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:50:58,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:50:58,560 INFO L85 PathProgramCache]: Analyzing trace with hash 900651385, now seen corresponding path program 1 times [2024-12-02 10:50:58,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:50:58,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151861820] [2024-12-02 10:50:58,560 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:50:58,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:50:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:50:58,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:50:58,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:50:58,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151861820] [2024-12-02 10:50:58,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151861820] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:50:58,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:50:58,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 10:50:58,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470965973] [2024-12-02 10:50:58,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:50:58,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 10:50:58,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:50:58,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 10:50:58,774 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-12-02 10:50:58,774 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:58,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:50:58,885 INFO L93 Difference]: Finished difference Result 80 states and 98 transitions. [2024-12-02 10:50:58,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 10:50:58,886 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-12-02 10:50:58,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:50:58,887 INFO L225 Difference]: With dead ends: 80 [2024-12-02 10:50:58,887 INFO L226 Difference]: Without dead ends: 80 [2024-12-02 10:50:58,887 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-12-02 10:50:58,888 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 23 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:50:58,888 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 126 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 10:50:58,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-12-02 10:50:58,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2024-12-02 10:50:58,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 67 states have (on average 1.4328358208955223) internal successors, (96), 77 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:58,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2024-12-02 10:50:58,892 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 11 [2024-12-02 10:50:58,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:50:58,893 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2024-12-02 10:50:58,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:58,893 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2024-12-02 10:50:58,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-12-02 10:50:58,893 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:50:58,893 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:50:58,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-12-02 10:50:58,894 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:50:58,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:50:58,894 INFO L85 PathProgramCache]: Analyzing trace with hash 615051197, now seen corresponding path program 1 times [2024-12-02 10:50:58,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:50:58,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401569749] [2024-12-02 10:50:58,895 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:50:58,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:50:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:50:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:50:59,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:50:59,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401569749] [2024-12-02 10:50:59,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401569749] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:50:59,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:50:59,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 10:50:59,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919188173] [2024-12-02 10:50:59,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:50:59,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 10:50:59,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:50:59,044 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 10:50:59,044 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-12-02 10:50:59,044 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:59,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:50:59,067 INFO L93 Difference]: Finished difference Result 77 states and 95 transitions. [2024-12-02 10:50:59,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 10:50:59,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-12-02 10:50:59,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:50:59,068 INFO L225 Difference]: With dead ends: 77 [2024-12-02 10:50:59,068 INFO L226 Difference]: Without dead ends: 77 [2024-12-02 10:50:59,068 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-12-02 10:50:59,069 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 24 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:50:59,069 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 61 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:50:59,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-12-02 10:50:59,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2024-12-02 10:50:59,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 61 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:59,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-12-02 10:50:59,071 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 11 [2024-12-02 10:50:59,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:50:59,072 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-12-02 10:50:59,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:59,072 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-12-02 10:50:59,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-12-02 10:50:59,072 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:50:59,072 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:50:59,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-12-02 10:50:59,073 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:50:59,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:50:59,073 INFO L85 PathProgramCache]: Analyzing trace with hash -2015222358, now seen corresponding path program 1 times [2024-12-02 10:50:59,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:50:59,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155466045] [2024-12-02 10:50:59,073 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:50:59,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:50:59,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:50:59,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:50:59,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:50:59,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155466045] [2024-12-02 10:50:59,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155466045] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:50:59,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:50:59,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 10:50:59,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201155658] [2024-12-02 10:50:59,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:50:59,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 10:50:59,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:50:59,199 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 10:50:59,199 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 10:50:59,199 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:59,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:50:59,245 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2024-12-02 10:50:59,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 10:50:59,246 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-12-02 10:50:59,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:50:59,246 INFO L225 Difference]: With dead ends: 70 [2024-12-02 10:50:59,246 INFO L226 Difference]: Without dead ends: 70 [2024-12-02 10:50:59,246 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 10:50:59,247 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 1 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:50:59,247 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 138 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:50:59,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-12-02 10:50:59,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2024-12-02 10:50:59,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 68 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:59,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2024-12-02 10:50:59,250 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 12 [2024-12-02 10:50:59,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:50:59,250 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2024-12-02 10:50:59,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:59,251 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2024-12-02 10:50:59,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-12-02 10:50:59,251 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:50:59,251 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:50:59,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-12-02 10:50:59,252 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:50:59,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:50:59,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1470398312, now seen corresponding path program 1 times [2024-12-02 10:50:59,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:50:59,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37229619] [2024-12-02 10:50:59,252 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:50:59,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:50:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:50:59,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:50:59,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:50:59,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37229619] [2024-12-02 10:50:59,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37229619] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:50:59,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:50:59,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 10:50:59,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151133013] [2024-12-02 10:50:59,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:50:59,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 10:50:59,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:50:59,400 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 10:50:59,400 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-12-02 10:50:59,400 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:59,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:50:59,475 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2024-12-02 10:50:59,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 10:50:59,475 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-12-02 10:50:59,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:50:59,476 INFO L225 Difference]: With dead ends: 76 [2024-12-02 10:50:59,476 INFO L226 Difference]: Without dead ends: 76 [2024-12-02 10:50:59,476 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-12-02 10:50:59,477 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:50:59,477 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 126 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 10:50:59,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-12-02 10:50:59,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2024-12-02 10:50:59,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 68 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:59,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2024-12-02 10:50:59,481 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 12 [2024-12-02 10:50:59,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:50:59,481 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2024-12-02 10:50:59,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:59,481 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2024-12-02 10:50:59,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-12-02 10:50:59,482 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:50:59,482 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:50:59,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-12-02 10:50:59,482 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:50:59,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:50:59,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1335163988, now seen corresponding path program 1 times [2024-12-02 10:50:59,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:50:59,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924071435] [2024-12-02 10:50:59,483 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:50:59,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:50:59,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:50:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:50:59,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:50:59,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924071435] [2024-12-02 10:50:59,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924071435] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:50:59,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:50:59,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 10:50:59,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291814045] [2024-12-02 10:50:59,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:50:59,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 10:50:59,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:50:59,642 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 10:50:59,642 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-12-02 10:50:59,642 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:59,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:50:59,692 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2024-12-02 10:50:59,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 10:50:59,693 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-12-02 10:50:59,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:50:59,693 INFO L225 Difference]: With dead ends: 80 [2024-12-02 10:50:59,693 INFO L226 Difference]: Without dead ends: 80 [2024-12-02 10:50:59,693 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-12-02 10:50:59,694 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:50:59,694 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 126 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:50:59,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-12-02 10:50:59,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 65. [2024-12-02 10:50:59,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 64 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:59,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2024-12-02 10:50:59,697 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 12 [2024-12-02 10:50:59,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:50:59,697 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2024-12-02 10:50:59,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:59,697 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2024-12-02 10:50:59,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-12-02 10:50:59,698 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:50:59,698 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:50:59,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-12-02 10:50:59,698 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:50:59,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:50:59,698 INFO L85 PathProgramCache]: Analyzing trace with hash -2144510614, now seen corresponding path program 1 times [2024-12-02 10:50:59,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:50:59,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302805418] [2024-12-02 10:50:59,699 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:50:59,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:50:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:50:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:50:59,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:50:59,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302805418] [2024-12-02 10:50:59,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302805418] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:50:59,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:50:59,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 10:50:59,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222135698] [2024-12-02 10:50:59,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:50:59,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 10:50:59,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:50:59,831 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 10:50:59,832 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-12-02 10:50:59,832 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:59,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:50:59,875 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2024-12-02 10:50:59,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 10:50:59,876 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-12-02 10:50:59,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:50:59,876 INFO L225 Difference]: With dead ends: 64 [2024-12-02 10:50:59,876 INFO L226 Difference]: Without dead ends: 64 [2024-12-02 10:50:59,876 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-12-02 10:50:59,877 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 11 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:50:59,877 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 76 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:50:59,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-12-02 10:50:59,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2024-12-02 10:50:59,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 60 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:59,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2024-12-02 10:50:59,880 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 12 [2024-12-02 10:50:59,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:50:59,880 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2024-12-02 10:50:59,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:50:59,880 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2024-12-02 10:50:59,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-12-02 10:50:59,880 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:50:59,880 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:50:59,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-12-02 10:50:59,881 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:50:59,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:50:59,882 INFO L85 PathProgramCache]: Analyzing trace with hash 242074378, now seen corresponding path program 1 times [2024-12-02 10:50:59,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:50:59,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794682617] [2024-12-02 10:50:59,882 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:50:59,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:50:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:00,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:00,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:00,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794682617] [2024-12-02 10:51:00,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794682617] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:51:00,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403212860] [2024-12-02 10:51:00,120 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:51:00,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:00,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:51:00,123 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:51:00,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 10:51:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:00,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-12-02 10:51:00,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:51:00,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 10:51:00,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-12-02 10:51:00,296 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 10 treesize of output 8 [2024-12-02 10:51:00,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:00,526 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:51:00,727 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 10:51:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:00,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403212860] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:51:00,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:51:00,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2024-12-02 10:51:00,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706528627] [2024-12-02 10:51:00,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:51:00,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-12-02 10:51:00,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:00,776 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-12-02 10:51:00,776 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2024-12-02 10:51:00,776 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:01,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:01,077 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2024-12-02 10:51:01,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 10:51:01,078 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-12-02 10:51:01,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:01,078 INFO L225 Difference]: With dead ends: 64 [2024-12-02 10:51:01,078 INFO L226 Difference]: Without dead ends: 64 [2024-12-02 10:51:01,079 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2024-12-02 10:51:01,079 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 34 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:01,079 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 235 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 10:51:01,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-12-02 10:51:01,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2024-12-02 10:51:01,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:01,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2024-12-02 10:51:01,081 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 13 [2024-12-02 10:51:01,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:01,081 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2024-12-02 10:51:01,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:01,081 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2024-12-02 10:51:01,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-12-02 10:51:01,082 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:01,082 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:01,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 10:51:01,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-12-02 10:51:01,283 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:01,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:01,283 INFO L85 PathProgramCache]: Analyzing trace with hash 401564717, now seen corresponding path program 1 times [2024-12-02 10:51:01,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:01,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731967952] [2024-12-02 10:51:01,283 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:51:01,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:01,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:01,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:01,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731967952] [2024-12-02 10:51:01,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731967952] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:51:01,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:51:01,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 10:51:01,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685000840] [2024-12-02 10:51:01,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:51:01,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 10:51:01,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:01,329 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 10:51:01,329 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 10:51:01,329 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:01,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:01,363 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2024-12-02 10:51:01,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 10:51:01,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-12-02 10:51:01,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:01,364 INFO L225 Difference]: With dead ends: 53 [2024-12-02 10:51:01,364 INFO L226 Difference]: Without dead ends: 53 [2024-12-02 10:51:01,364 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 10:51:01,364 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:01,365 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 56 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:51:01,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-12-02 10:51:01,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-12-02 10:51:01,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.391304347826087) internal successors, (64), 52 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:01,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-12-02 10:51:01,366 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 14 [2024-12-02 10:51:01,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:01,367 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-12-02 10:51:01,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:01,367 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-12-02 10:51:01,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-12-02 10:51:01,367 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:01,367 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:01,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-12-02 10:51:01,367 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:01,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:01,368 INFO L85 PathProgramCache]: Analyzing trace with hash 401564718, now seen corresponding path program 1 times [2024-12-02 10:51:01,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:01,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972518067] [2024-12-02 10:51:01,368 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:51:01,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:01,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:01,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:01,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972518067] [2024-12-02 10:51:01,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972518067] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:51:01,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:51:01,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 10:51:01,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477142047] [2024-12-02 10:51:01,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:51:01,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 10:51:01,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:01,473 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 10:51:01,473 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-12-02 10:51:01,473 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:01,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:01,536 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2024-12-02 10:51:01,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 10:51:01,537 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-12-02 10:51:01,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:01,537 INFO L225 Difference]: With dead ends: 60 [2024-12-02 10:51:01,537 INFO L226 Difference]: Without dead ends: 60 [2024-12-02 10:51:01,537 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-12-02 10:51:01,538 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 18 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:01,538 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 121 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 10:51:01,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-12-02 10:51:01,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2024-12-02 10:51:01,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:01,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2024-12-02 10:51:01,540 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 14 [2024-12-02 10:51:01,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:01,540 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2024-12-02 10:51:01,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:01,540 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2024-12-02 10:51:01,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-12-02 10:51:01,541 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:01,541 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:01,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-12-02 10:51:01,541 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:01,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:01,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1488851534, now seen corresponding path program 1 times [2024-12-02 10:51:01,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:01,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617100429] [2024-12-02 10:51:01,541 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:51:01,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:01,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:01,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:01,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617100429] [2024-12-02 10:51:01,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617100429] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:51:01,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861391687] [2024-12-02 10:51:01,722 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:51:01,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:01,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:51:01,724 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:51:01,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 10:51:01,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:01,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-12-02 10:51:01,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:51:01,837 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 [2024-12-02 10:51:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:02,163 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:51:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:02,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861391687] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:51:02,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:51:02,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-12-02 10:51:02,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355500353] [2024-12-02 10:51:02,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:51:02,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-12-02 10:51:02,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:02,479 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-12-02 10:51:02,479 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2024-12-02 10:51:02,480 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:02,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:02,788 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2024-12-02 10:51:02,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 10:51:02,788 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-12-02 10:51:02,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:02,789 INFO L225 Difference]: With dead ends: 56 [2024-12-02 10:51:02,789 INFO L226 Difference]: Without dead ends: 56 [2024-12-02 10:51:02,789 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2024-12-02 10:51:02,790 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 32 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:02,790 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 271 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 10:51:02,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-12-02 10:51:02,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2024-12-02 10:51:02,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:02,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2024-12-02 10:51:02,792 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 15 [2024-12-02 10:51:02,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:02,792 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2024-12-02 10:51:02,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:02,792 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2024-12-02 10:51:02,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-12-02 10:51:02,793 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:02,793 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:02,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 10:51:02,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:02,994 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:02,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:02,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1530611578, now seen corresponding path program 1 times [2024-12-02 10:51:02,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:02,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987743075] [2024-12-02 10:51:02,994 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:51:02,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:03,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:03,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987743075] [2024-12-02 10:51:03,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987743075] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:51:03,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804426177] [2024-12-02 10:51:03,216 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:51:03,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:03,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:51:03,218 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:51:03,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 10:51:03,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:03,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-12-02 10:51:03,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:51:03,303 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 [2024-12-02 10:51:03,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:03,339 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:51:03,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804426177] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:51:03,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 10:51:03,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2024-12-02 10:51:03,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156220568] [2024-12-02 10:51:03,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:51:03,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 10:51:03,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:03,341 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 10:51:03,341 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-12-02 10:51:03,341 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:03,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:03,383 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2024-12-02 10:51:03,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 10:51:03,383 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-12-02 10:51:03,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:03,384 INFO L225 Difference]: With dead ends: 61 [2024-12-02 10:51:03,384 INFO L226 Difference]: Without dead ends: 61 [2024-12-02 10:51:03,384 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-12-02 10:51:03,385 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:03,385 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 157 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:51:03,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-12-02 10:51:03,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2024-12-02 10:51:03,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:03,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2024-12-02 10:51:03,387 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 17 [2024-12-02 10:51:03,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:03,387 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2024-12-02 10:51:03,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:03,388 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2024-12-02 10:51:03,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-12-02 10:51:03,388 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:03,388 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:03,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 10:51:03,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:03,588 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:03,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:03,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1530613701, now seen corresponding path program 1 times [2024-12-02 10:51:03,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:03,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587944551] [2024-12-02 10:51:03,589 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:51:03,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:03,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:03,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:03,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587944551] [2024-12-02 10:51:03,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587944551] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:51:03,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:51:03,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 10:51:03,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43365412] [2024-12-02 10:51:03,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:51:03,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 10:51:03,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:03,629 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 10:51:03,629 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 10:51:03,629 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:03,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:03,670 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2024-12-02 10:51:03,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 10:51:03,670 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-12-02 10:51:03,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:03,671 INFO L225 Difference]: With dead ends: 59 [2024-12-02 10:51:03,671 INFO L226 Difference]: Without dead ends: 59 [2024-12-02 10:51:03,671 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 10:51:03,673 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 23 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:03,673 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 80 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:51:03,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-12-02 10:51:03,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-12-02 10:51:03,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:03,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2024-12-02 10:51:03,675 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 17 [2024-12-02 10:51:03,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:03,675 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2024-12-02 10:51:03,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:03,676 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2024-12-02 10:51:03,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-12-02 10:51:03,676 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:03,676 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:03,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-12-02 10:51:03,676 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:03,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:03,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1530613702, now seen corresponding path program 1 times [2024-12-02 10:51:03,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:03,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366373499] [2024-12-02 10:51:03,677 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:51:03,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:03,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:03,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:03,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366373499] [2024-12-02 10:51:03,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366373499] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:51:03,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:51:03,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 10:51:03,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224826579] [2024-12-02 10:51:03,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:51:03,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 10:51:03,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:03,764 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 10:51:03,764 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-12-02 10:51:03,764 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:03,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:03,829 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2024-12-02 10:51:03,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 10:51:03,829 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-12-02 10:51:03,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:03,830 INFO L225 Difference]: With dead ends: 78 [2024-12-02 10:51:03,830 INFO L226 Difference]: Without dead ends: 78 [2024-12-02 10:51:03,830 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-12-02 10:51:03,831 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 32 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:03,831 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 133 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 10:51:03,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-12-02 10:51:03,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 61. [2024-12-02 10:51:03,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:03,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2024-12-02 10:51:03,832 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 17 [2024-12-02 10:51:03,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:03,832 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2024-12-02 10:51:03,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:03,833 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2024-12-02 10:51:03,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-12-02 10:51:03,833 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:03,833 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:03,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-12-02 10:51:03,833 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:03,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:03,834 INFO L85 PathProgramCache]: Analyzing trace with hash 943805564, now seen corresponding path program 1 times [2024-12-02 10:51:03,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:03,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837134703] [2024-12-02 10:51:03,834 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:51:03,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:03,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:03,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:03,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:03,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837134703] [2024-12-02 10:51:03,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837134703] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:51:03,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306741294] [2024-12-02 10:51:03,971 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:51:03,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:03,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:51:03,972 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:51:03,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 10:51:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:04,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-12-02 10:51:04,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:51:04,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 10:51:04,078 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 14 treesize of output 10 [2024-12-02 10:51:04,164 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 10:51:04,165 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 18 treesize of output 19 [2024-12-02 10:51:04,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:04,235 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:51:04,413 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 13 treesize of output 11 [2024-12-02 10:51:04,421 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 [2024-12-02 10:51:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:04,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306741294] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:51:04,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:51:04,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 18 [2024-12-02 10:51:04,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287863751] [2024-12-02 10:51:04,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:51:04,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-12-02 10:51:04,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:04,478 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-12-02 10:51:04,479 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2024-12-02 10:51:04,479 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:04,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:04,835 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2024-12-02 10:51:04,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-12-02 10:51:04,836 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-12-02 10:51:04,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:04,836 INFO L225 Difference]: With dead ends: 94 [2024-12-02 10:51:04,836 INFO L226 Difference]: Without dead ends: 94 [2024-12-02 10:51:04,837 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2024-12-02 10:51:04,837 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 43 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:04,837 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 319 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 10:51:04,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-12-02 10:51:04,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 64. [2024-12-02 10:51:04,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.271186440677966) internal successors, (75), 63 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:04,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2024-12-02 10:51:04,840 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 17 [2024-12-02 10:51:04,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:04,840 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2024-12-02 10:51:04,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:04,840 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2024-12-02 10:51:04,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-12-02 10:51:04,841 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:04,841 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:04,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 10:51:05,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:05,041 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:05,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:05,042 INFO L85 PathProgramCache]: Analyzing trace with hash 204384536, now seen corresponding path program 1 times [2024-12-02 10:51:05,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:05,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93646761] [2024-12-02 10:51:05,042 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:51:05,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:05,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:05,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:05,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:05,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93646761] [2024-12-02 10:51:05,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93646761] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:51:05,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:51:05,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 10:51:05,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071961997] [2024-12-02 10:51:05,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:51:05,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 10:51:05,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:05,074 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 10:51:05,074 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 10:51:05,074 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:05,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:05,109 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2024-12-02 10:51:05,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 10:51:05,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-12-02 10:51:05,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:05,110 INFO L225 Difference]: With dead ends: 63 [2024-12-02 10:51:05,110 INFO L226 Difference]: Without dead ends: 63 [2024-12-02 10:51:05,110 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-12-02 10:51:05,111 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:05,111 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 67 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:51:05,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-12-02 10:51:05,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-12-02 10:51:05,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 62 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:05,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2024-12-02 10:51:05,113 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 18 [2024-12-02 10:51:05,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:05,113 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2024-12-02 10:51:05,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:05,114 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2024-12-02 10:51:05,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-12-02 10:51:05,114 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:05,114 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:05,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-12-02 10:51:05,114 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:05,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:05,115 INFO L85 PathProgramCache]: Analyzing trace with hash 204384537, now seen corresponding path program 1 times [2024-12-02 10:51:05,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:05,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287250006] [2024-12-02 10:51:05,115 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:51:05,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:05,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:05,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:05,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:05,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287250006] [2024-12-02 10:51:05,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287250006] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:51:05,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:51:05,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 10:51:05,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459566765] [2024-12-02 10:51:05,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:51:05,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 10:51:05,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:05,262 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 10:51:05,262 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-12-02 10:51:05,262 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:05,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:05,334 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2024-12-02 10:51:05,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 10:51:05,334 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-12-02 10:51:05,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:05,335 INFO L225 Difference]: With dead ends: 72 [2024-12-02 10:51:05,335 INFO L226 Difference]: Without dead ends: 72 [2024-12-02 10:51:05,335 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-12-02 10:51:05,335 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 15 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:05,335 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 127 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 10:51:05,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-12-02 10:51:05,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2024-12-02 10:51:05,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 65 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:05,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2024-12-02 10:51:05,337 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 18 [2024-12-02 10:51:05,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:05,338 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2024-12-02 10:51:05,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:05,338 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2024-12-02 10:51:05,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-12-02 10:51:05,338 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:05,338 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:05,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-12-02 10:51:05,339 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:05,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:05,339 INFO L85 PathProgramCache]: Analyzing trace with hash 2055654508, now seen corresponding path program 2 times [2024-12-02 10:51:05,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:05,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769673991] [2024-12-02 10:51:05,339 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:51:05,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:05,355 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:51:05,355 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:05,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 10:51:05,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:05,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769673991] [2024-12-02 10:51:05,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769673991] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:51:05,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:51:05,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-12-02 10:51:05,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209250428] [2024-12-02 10:51:05,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:51:05,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 10:51:05,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:05,497 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 10:51:05,497 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-12-02 10:51:05,497 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:05,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:05,589 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2024-12-02 10:51:05,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 10:51:05,590 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-12-02 10:51:05,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:05,590 INFO L225 Difference]: With dead ends: 83 [2024-12-02 10:51:05,590 INFO L226 Difference]: Without dead ends: 83 [2024-12-02 10:51:05,591 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-12-02 10:51:05,591 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 26 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:05,591 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 189 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 10:51:05,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-12-02 10:51:05,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 62. [2024-12-02 10:51:05,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 61 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:05,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2024-12-02 10:51:05,593 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 20 [2024-12-02 10:51:05,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:05,594 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2024-12-02 10:51:05,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:05,594 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2024-12-02 10:51:05,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-12-02 10:51:05,594 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:05,594 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:05,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-12-02 10:51:05,594 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:05,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:05,595 INFO L85 PathProgramCache]: Analyzing trace with hash 467306606, now seen corresponding path program 1 times [2024-12-02 10:51:05,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:05,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542221029] [2024-12-02 10:51:05,595 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:51:05,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:05,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:05,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 10:51:05,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:05,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542221029] [2024-12-02 10:51:05,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542221029] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:51:05,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:51:05,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-12-02 10:51:05,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423070313] [2024-12-02 10:51:05,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:51:05,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 10:51:05,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:05,740 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 10:51:05,740 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-12-02 10:51:05,740 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:05,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:05,799 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2024-12-02 10:51:05,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 10:51:05,799 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-12-02 10:51:05,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:05,800 INFO L225 Difference]: With dead ends: 73 [2024-12-02 10:51:05,800 INFO L226 Difference]: Without dead ends: 73 [2024-12-02 10:51:05,800 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-12-02 10:51:05,800 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:05,801 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 176 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 10:51:05,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-12-02 10:51:05,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2024-12-02 10:51:05,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 59 states have (on average 1.271186440677966) internal successors, (75), 62 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:05,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2024-12-02 10:51:05,803 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 20 [2024-12-02 10:51:05,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:05,803 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2024-12-02 10:51:05,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:05,803 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2024-12-02 10:51:05,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-12-02 10:51:05,804 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:05,804 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] [2024-12-02 10:51:05,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-12-02 10:51:05,804 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:05,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:05,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1443848500, now seen corresponding path program 1 times [2024-12-02 10:51:05,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:05,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579210202] [2024-12-02 10:51:05,804 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:51:05,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:05,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:05,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:05,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579210202] [2024-12-02 10:51:05,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579210202] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:51:05,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:51:05,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-12-02 10:51:05,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460867513] [2024-12-02 10:51:05,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:51:05,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 10:51:05,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:05,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 10:51:05,954 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-12-02 10:51:05,954 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:06,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:06,004 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2024-12-02 10:51:06,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 10:51:06,005 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-12-02 10:51:06,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:06,005 INFO L225 Difference]: With dead ends: 100 [2024-12-02 10:51:06,005 INFO L226 Difference]: Without dead ends: 100 [2024-12-02 10:51:06,006 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-12-02 10:51:06,006 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 10 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:06,006 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 204 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:51:06,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-12-02 10:51:06,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2024-12-02 10:51:06,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 94 states have (on average 1.2446808510638299) internal successors, (117), 97 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:06,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 117 transitions. [2024-12-02 10:51:06,010 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 117 transitions. Word has length 21 [2024-12-02 10:51:06,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:06,010 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 117 transitions. [2024-12-02 10:51:06,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:06,010 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 117 transitions. [2024-12-02 10:51:06,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-12-02 10:51:06,011 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:06,011 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] [2024-12-02 10:51:06,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-12-02 10:51:06,011 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:06,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:06,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1162175054, now seen corresponding path program 1 times [2024-12-02 10:51:06,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:06,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675167815] [2024-12-02 10:51:06,012 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:51:06,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:06,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:06,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:06,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675167815] [2024-12-02 10:51:06,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675167815] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:51:06,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:51:06,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-12-02 10:51:06,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838226730] [2024-12-02 10:51:06,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:51:06,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 10:51:06,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:06,178 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 10:51:06,179 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-12-02 10:51:06,179 INFO L87 Difference]: Start difference. First operand 98 states and 117 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:06,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:06,250 INFO L93 Difference]: Finished difference Result 124 states and 143 transitions. [2024-12-02 10:51:06,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 10:51:06,250 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-12-02 10:51:06,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:06,251 INFO L225 Difference]: With dead ends: 124 [2024-12-02 10:51:06,251 INFO L226 Difference]: Without dead ends: 124 [2024-12-02 10:51:06,251 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-12-02 10:51:06,251 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 18 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:06,252 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 198 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 10:51:06,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-12-02 10:51:06,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2024-12-02 10:51:06,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 91 states have (on average 1.2417582417582418) internal successors, (113), 94 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:06,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 113 transitions. [2024-12-02 10:51:06,255 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 113 transitions. Word has length 21 [2024-12-02 10:51:06,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:06,255 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 113 transitions. [2024-12-02 10:51:06,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:06,255 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 113 transitions. [2024-12-02 10:51:06,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-12-02 10:51:06,255 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:06,255 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] [2024-12-02 10:51:06,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-12-02 10:51:06,256 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:06,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:06,256 INFO L85 PathProgramCache]: Analyzing trace with hash -831969652, now seen corresponding path program 1 times [2024-12-02 10:51:06,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:06,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454885840] [2024-12-02 10:51:06,256 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:51:06,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:06,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:06,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:06,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:06,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454885840] [2024-12-02 10:51:06,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454885840] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:51:06,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:51:06,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-12-02 10:51:06,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871470653] [2024-12-02 10:51:06,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:51:06,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 10:51:06,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:06,413 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 10:51:06,413 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-12-02 10:51:06,413 INFO L87 Difference]: Start difference. First operand 95 states and 113 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:06,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:06,471 INFO L93 Difference]: Finished difference Result 137 states and 161 transitions. [2024-12-02 10:51:06,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 10:51:06,471 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-12-02 10:51:06,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:06,472 INFO L225 Difference]: With dead ends: 137 [2024-12-02 10:51:06,472 INFO L226 Difference]: Without dead ends: 137 [2024-12-02 10:51:06,472 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-12-02 10:51:06,472 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 29 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:06,473 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 182 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 10:51:06,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-12-02 10:51:06,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 97. [2024-12-02 10:51:06,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 93 states have (on average 1.2580645161290323) internal successors, (117), 96 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2024-12-02 10:51:06,476 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 21 [2024-12-02 10:51:06,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:06,476 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2024-12-02 10:51:06,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:06,476 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2024-12-02 10:51:06,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-12-02 10:51:06,476 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:06,476 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:06,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-12-02 10:51:06,477 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:06,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:06,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1809555010, now seen corresponding path program 1 times [2024-12-02 10:51:06,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:06,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408252589] [2024-12-02 10:51:06,477 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:51:06,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:06,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:06,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:06,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:06,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408252589] [2024-12-02 10:51:06,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408252589] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:51:06,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:51:06,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 10:51:06,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060672835] [2024-12-02 10:51:06,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:51:06,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 10:51:06,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:06,572 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 10:51:06,572 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 10:51:06,572 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:06,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:06,592 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2024-12-02 10:51:06,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 10:51:06,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-12-02 10:51:06,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:06,593 INFO L225 Difference]: With dead ends: 96 [2024-12-02 10:51:06,593 INFO L226 Difference]: Without dead ends: 78 [2024-12-02 10:51:06,594 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 10:51:06,594 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 17 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:06,594 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 56 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:51:06,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-12-02 10:51:06,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-12-02 10:51:06,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 75 states have (on average 1.2) internal successors, (90), 77 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:06,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2024-12-02 10:51:06,599 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 22 [2024-12-02 10:51:06,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:06,599 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2024-12-02 10:51:06,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:06,599 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2024-12-02 10:51:06,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-12-02 10:51:06,600 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:06,600 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:06,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-12-02 10:51:06,600 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:06,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:06,600 INFO L85 PathProgramCache]: Analyzing trace with hash -522705835, now seen corresponding path program 1 times [2024-12-02 10:51:06,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:06,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97361048] [2024-12-02 10:51:06,601 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:51:06,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:06,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:06,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:06,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97361048] [2024-12-02 10:51:06,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97361048] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:51:06,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912880284] [2024-12-02 10:51:06,862 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:51:06,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:06,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:51:06,863 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:51:06,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 10:51:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:06,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-12-02 10:51:06,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:51:07,006 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 [2024-12-02 10:51:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:07,077 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:51:07,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 10:51:07,092 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 [2024-12-02 10:51:07,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:07,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912880284] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:51:07,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:51:07,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2024-12-02 10:51:07,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782088786] [2024-12-02 10:51:07,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:51:07,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-12-02 10:51:07,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:07,159 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-12-02 10:51:07,159 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2024-12-02 10:51:07,159 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:07,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:07,633 INFO L93 Difference]: Finished difference Result 143 states and 162 transitions. [2024-12-02 10:51:07,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-12-02 10:51:07,634 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-12-02 10:51:07,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:07,635 INFO L225 Difference]: With dead ends: 143 [2024-12-02 10:51:07,635 INFO L226 Difference]: Without dead ends: 143 [2024-12-02 10:51:07,635 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2024-12-02 10:51:07,636 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 71 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:07,636 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 401 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 10:51:07,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-12-02 10:51:07,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 110. [2024-12-02 10:51:07,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 107 states have (on average 1.1869158878504673) internal successors, (127), 109 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:07,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 127 transitions. [2024-12-02 10:51:07,639 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 127 transitions. Word has length 24 [2024-12-02 10:51:07,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:07,640 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 127 transitions. [2024-12-02 10:51:07,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:07,640 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 127 transitions. [2024-12-02 10:51:07,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-12-02 10:51:07,640 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:07,640 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] [2024-12-02 10:51:07,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 10:51:07,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:07,841 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:07,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:07,841 INFO L85 PathProgramCache]: Analyzing trace with hash 976054174, now seen corresponding path program 1 times [2024-12-02 10:51:07,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:07,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404523110] [2024-12-02 10:51:07,842 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:51:07,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:07,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:08,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:08,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404523110] [2024-12-02 10:51:08,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404523110] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:51:08,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754092956] [2024-12-02 10:51:08,023 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:51:08,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:08,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:51:08,025 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:51:08,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 10:51:08,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:08,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-12-02 10:51:08,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:51:08,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 10:51:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:08,196 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:51:08,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:08,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754092956] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:51:08,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:51:08,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-12-02 10:51:08,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951849851] [2024-12-02 10:51:08,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:51:08,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-12-02 10:51:08,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:08,359 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-12-02 10:51:08,360 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2024-12-02 10:51:08,360 INFO L87 Difference]: Start difference. First operand 110 states and 127 transitions. Second operand has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:08,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:08,529 INFO L93 Difference]: Finished difference Result 124 states and 139 transitions. [2024-12-02 10:51:08,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 10:51:08,530 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-12-02 10:51:08,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:08,530 INFO L225 Difference]: With dead ends: 124 [2024-12-02 10:51:08,530 INFO L226 Difference]: Without dead ends: 109 [2024-12-02 10:51:08,531 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2024-12-02 10:51:08,531 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:08,531 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 196 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 10:51:08,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-12-02 10:51:08,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2024-12-02 10:51:08,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 97 states have (on average 1.1855670103092784) internal successors, (115), 99 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:08,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 115 transitions. [2024-12-02 10:51:08,534 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 115 transitions. Word has length 25 [2024-12-02 10:51:08,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:08,534 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 115 transitions. [2024-12-02 10:51:08,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:08,535 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 115 transitions. [2024-12-02 10:51:08,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-12-02 10:51:08,535 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:08,535 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] [2024-12-02 10:51:08,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 10:51:08,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-12-02 10:51:08,735 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:08,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:08,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1118850245, now seen corresponding path program 1 times [2024-12-02 10:51:08,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:08,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388577858] [2024-12-02 10:51:08,736 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:51:08,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:08,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:08,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:08,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388577858] [2024-12-02 10:51:08,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388577858] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:51:08,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468522134] [2024-12-02 10:51:08,904 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:51:08,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:08,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:51:08,905 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:51:08,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 10:51:08,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:08,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-12-02 10:51:08,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:51:09,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:09,083 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:51:09,213 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 5 treesize of output 3 [2024-12-02 10:51:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:09,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468522134] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:51:09,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:51:09,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-12-02 10:51:09,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497364205] [2024-12-02 10:51:09,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:51:09,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-12-02 10:51:09,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:09,241 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-12-02 10:51:09,241 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-12-02 10:51:09,241 INFO L87 Difference]: Start difference. First operand 100 states and 115 transitions. Second operand has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:09,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:09,414 INFO L93 Difference]: Finished difference Result 111 states and 124 transitions. [2024-12-02 10:51:09,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 10:51:09,414 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-12-02 10:51:09,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:09,415 INFO L225 Difference]: With dead ends: 111 [2024-12-02 10:51:09,415 INFO L226 Difference]: Without dead ends: 111 [2024-12-02 10:51:09,415 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2024-12-02 10:51:09,416 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 17 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:09,416 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 303 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 10:51:09,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-12-02 10:51:09,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 104. [2024-12-02 10:51:09,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 103 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:09,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 118 transitions. [2024-12-02 10:51:09,418 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 118 transitions. Word has length 25 [2024-12-02 10:51:09,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:09,418 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 118 transitions. [2024-12-02 10:51:09,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.736842105263158) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:09,418 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 118 transitions. [2024-12-02 10:51:09,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-12-02 10:51:09,419 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:09,419 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:09,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 10:51:09,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:09,619 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:09,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:09,620 INFO L85 PathProgramCache]: Analyzing trace with hash 324619258, now seen corresponding path program 1 times [2024-12-02 10:51:09,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:09,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749972759] [2024-12-02 10:51:09,620 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:51:09,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:09,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:09,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749972759] [2024-12-02 10:51:09,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749972759] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:51:09,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405092841] [2024-12-02 10:51:09,869 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:51:09,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:09,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:51:09,871 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:51:09,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 10:51:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:09,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-12-02 10:51:09,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:51:10,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 10:51:10,043 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 [2024-12-02 10:51:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:51:10,424 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:51:10,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:51:10,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405092841] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:51:10,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:51:10,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2024-12-02 10:51:10,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476354906] [2024-12-02 10:51:10,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:51:10,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-12-02 10:51:10,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:10,765 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-12-02 10:51:10,765 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2024-12-02 10:51:10,765 INFO L87 Difference]: Start difference. First operand 104 states and 118 transitions. Second operand has 30 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:11,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:11,307 INFO L93 Difference]: Finished difference Result 130 states and 144 transitions. [2024-12-02 10:51:11,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-12-02 10:51:11,308 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-12-02 10:51:11,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:11,308 INFO L225 Difference]: With dead ends: 130 [2024-12-02 10:51:11,308 INFO L226 Difference]: Without dead ends: 130 [2024-12-02 10:51:11,309 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2024-12-02 10:51:11,309 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 43 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:11,309 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 308 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 10:51:11,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-12-02 10:51:11,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 116. [2024-12-02 10:51:11,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 113 states have (on average 1.1592920353982301) internal successors, (131), 115 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:11,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 131 transitions. [2024-12-02 10:51:11,313 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 131 transitions. Word has length 26 [2024-12-02 10:51:11,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:11,313 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 131 transitions. [2024-12-02 10:51:11,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:11,313 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 131 transitions. [2024-12-02 10:51:11,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-12-02 10:51:11,313 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:11,313 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:11,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 10:51:11,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:11,514 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:11,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:11,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1534000053, now seen corresponding path program 2 times [2024-12-02 10:51:11,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:11,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192372985] [2024-12-02 10:51:11,514 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:51:11,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:11,534 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:51:11,534 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:11,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:11,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:11,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192372985] [2024-12-02 10:51:11,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192372985] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:51:11,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278619546] [2024-12-02 10:51:11,841 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:51:11,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:11,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:51:11,843 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:51:11,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 10:51:11,935 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:51:11,935 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:11,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-12-02 10:51:11,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:51:11,999 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 [2024-12-02 10:51:12,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:12,045 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:51:12,066 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 15 treesize of output 13 [2024-12-02 10:51:12,068 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 [2024-12-02 10:51:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:12,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278619546] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:51:12,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:51:12,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 20 [2024-12-02 10:51:12,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158331608] [2024-12-02 10:51:12,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:51:12,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-12-02 10:51:12,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:12,121 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-12-02 10:51:12,121 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-12-02 10:51:12,121 INFO L87 Difference]: Start difference. First operand 116 states and 131 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:12,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:12,224 INFO L93 Difference]: Finished difference Result 196 states and 218 transitions. [2024-12-02 10:51:12,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 10:51:12,224 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-12-02 10:51:12,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:12,225 INFO L225 Difference]: With dead ends: 196 [2024-12-02 10:51:12,225 INFO L226 Difference]: Without dead ends: 163 [2024-12-02 10:51:12,225 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2024-12-02 10:51:12,225 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 27 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:12,226 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 424 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 10:51:12,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-12-02 10:51:12,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 155. [2024-12-02 10:51:12,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 152 states have (on average 1.144736842105263) internal successors, (174), 154 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:12,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 174 transitions. [2024-12-02 10:51:12,229 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 174 transitions. Word has length 29 [2024-12-02 10:51:12,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:12,229 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 174 transitions. [2024-12-02 10:51:12,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:12,230 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 174 transitions. [2024-12-02 10:51:12,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-12-02 10:51:12,230 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:12,230 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:12,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 10:51:12,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-12-02 10:51:12,430 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:12,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:12,431 INFO L85 PathProgramCache]: Analyzing trace with hash -2023111636, now seen corresponding path program 2 times [2024-12-02 10:51:12,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:12,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804438953] [2024-12-02 10:51:12,431 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:51:12,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:12,445 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:51:12,446 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:12,755 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:12,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:12,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804438953] [2024-12-02 10:51:12,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804438953] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:51:12,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188455143] [2024-12-02 10:51:12,755 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:51:12,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:12,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:51:12,757 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:51:12,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 10:51:12,832 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:51:12,832 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:12,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-12-02 10:51:12,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:51:12,918 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 [2024-12-02 10:51:13,014 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:13,014 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:51:13,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 10:51:13,030 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 [2024-12-02 10:51:13,092 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:13,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188455143] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:51:13,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:51:13,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2024-12-02 10:51:13,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841493802] [2024-12-02 10:51:13,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:51:13,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-12-02 10:51:13,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:13,094 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-12-02 10:51:13,094 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2024-12-02 10:51:13,094 INFO L87 Difference]: Start difference. First operand 155 states and 174 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:13,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:13,670 INFO L93 Difference]: Finished difference Result 267 states and 294 transitions. [2024-12-02 10:51:13,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-12-02 10:51:13,670 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-12-02 10:51:13,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:13,671 INFO L225 Difference]: With dead ends: 267 [2024-12-02 10:51:13,671 INFO L226 Difference]: Without dead ends: 255 [2024-12-02 10:51:13,671 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2024-12-02 10:51:13,671 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 72 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:13,672 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 570 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 10:51:13,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2024-12-02 10:51:13,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 200. [2024-12-02 10:51:13,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 197 states have (on average 1.1421319796954315) internal successors, (225), 199 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:13,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 225 transitions. [2024-12-02 10:51:13,675 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 225 transitions. Word has length 31 [2024-12-02 10:51:13,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:13,675 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 225 transitions. [2024-12-02 10:51:13,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:13,675 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 225 transitions. [2024-12-02 10:51:13,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-12-02 10:51:13,675 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:13,676 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:13,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 10:51:13,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-12-02 10:51:13,876 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:13,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:13,876 INFO L85 PathProgramCache]: Analyzing trace with hash 227467652, now seen corresponding path program 3 times [2024-12-02 10:51:13,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:13,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169442666] [2024-12-02 10:51:13,877 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:51:13,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:13,890 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 10:51:13,891 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:14,089 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:14,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:14,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169442666] [2024-12-02 10:51:14,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169442666] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:51:14,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437515822] [2024-12-02 10:51:14,090 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:51:14,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:14,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:51:14,092 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:51:14,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 10:51:14,192 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 10:51:14,192 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:14,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-12-02 10:51:14,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:51:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:14,324 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:51:14,443 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 21 treesize of output 17 [2024-12-02 10:51:14,526 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:14,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437515822] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:51:14,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:51:14,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2024-12-02 10:51:14,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210507293] [2024-12-02 10:51:14,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:51:14,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-12-02 10:51:14,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:14,527 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-12-02 10:51:14,527 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2024-12-02 10:51:14,528 INFO L87 Difference]: Start difference. First operand 200 states and 225 transitions. Second operand has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:14,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:14,739 INFO L93 Difference]: Finished difference Result 207 states and 230 transitions. [2024-12-02 10:51:14,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 10:51:14,739 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-12-02 10:51:14,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:14,740 INFO L225 Difference]: With dead ends: 207 [2024-12-02 10:51:14,741 INFO L226 Difference]: Without dead ends: 207 [2024-12-02 10:51:14,741 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2024-12-02 10:51:14,741 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 19 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:14,741 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 386 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 10:51:14,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-12-02 10:51:14,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2024-12-02 10:51:14,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 202 states have (on average 1.1386138613861385) internal successors, (230), 204 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:14,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 230 transitions. [2024-12-02 10:51:14,745 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 230 transitions. Word has length 33 [2024-12-02 10:51:14,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:14,746 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 230 transitions. [2024-12-02 10:51:14,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:14,746 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 230 transitions. [2024-12-02 10:51:14,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-12-02 10:51:14,746 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:14,746 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:14,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 10:51:14,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-12-02 10:51:14,947 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:14,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:14,947 INFO L85 PathProgramCache]: Analyzing trace with hash 8987018, now seen corresponding path program 4 times [2024-12-02 10:51:14,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:14,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636638545] [2024-12-02 10:51:14,947 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:51:14,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:14,965 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:51:14,965 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 10:51:15,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:15,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636638545] [2024-12-02 10:51:15,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636638545] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:51:15,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584202518] [2024-12-02 10:51:15,626 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:51:15,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:15,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:51:15,628 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:51:15,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 10:51:15,740 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:51:15,741 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:15,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-12-02 10:51:15,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:51:15,763 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 14 treesize of output 10 [2024-12-02 10:51:16,426 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2024-12-02 10:51:16,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 39 [2024-12-02 10:51:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 10:51:16,505 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:51:17,145 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 44 treesize of output 38 [2024-12-02 10:51:17,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2024-12-02 10:51:17,160 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 5 treesize of output 3 [2024-12-02 10:51:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 10:51:17,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584202518] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:51:17,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:51:17,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2024-12-02 10:51:17,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145090301] [2024-12-02 10:51:17,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:51:17,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-12-02 10:51:17,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:17,180 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-12-02 10:51:17,180 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1152, Unknown=0, NotChecked=0, Total=1332 [2024-12-02 10:51:17,181 INFO L87 Difference]: Start difference. First operand 205 states and 230 transitions. Second operand has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:17,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:17,533 INFO L93 Difference]: Finished difference Result 205 states and 229 transitions. [2024-12-02 10:51:17,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-12-02 10:51:17,534 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-12-02 10:51:17,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:17,535 INFO L225 Difference]: With dead ends: 205 [2024-12-02 10:51:17,535 INFO L226 Difference]: Without dead ends: 205 [2024-12-02 10:51:17,536 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=229, Invalid=1331, Unknown=0, NotChecked=0, Total=1560 [2024-12-02 10:51:17,536 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:17,536 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 251 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 10:51:17,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-12-02 10:51:17,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 187. [2024-12-02 10:51:17,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 185 states have (on average 1.1405405405405404) internal successors, (211), 186 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:17,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 211 transitions. [2024-12-02 10:51:17,540 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 211 transitions. Word has length 37 [2024-12-02 10:51:17,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:17,540 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 211 transitions. [2024-12-02 10:51:17,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:17,541 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 211 transitions. [2024-12-02 10:51:17,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-12-02 10:51:17,541 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:17,541 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:17,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 10:51:17,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-12-02 10:51:17,742 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:17,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:17,742 INFO L85 PathProgramCache]: Analyzing trace with hash -508347805, now seen corresponding path program 3 times [2024-12-02 10:51:17,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:17,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170626079] [2024-12-02 10:51:17,742 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:51:17,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:17,757 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-12-02 10:51:17,757 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:18,081 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:18,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:18,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170626079] [2024-12-02 10:51:18,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170626079] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:51:18,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478184261] [2024-12-02 10:51:18,082 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:51:18,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:18,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:51:18,084 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:51:18,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-02 10:51:18,192 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-12-02 10:51:18,192 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:18,194 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-12-02 10:51:18,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:51:18,284 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 [2024-12-02 10:51:18,392 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:18,392 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:51:18,408 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 15 treesize of output 13 [2024-12-02 10:51:18,410 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 [2024-12-02 10:51:18,474 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:18,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478184261] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:51:18,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:51:18,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2024-12-02 10:51:18,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701436889] [2024-12-02 10:51:18,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:51:18,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-12-02 10:51:18,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:18,475 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-12-02 10:51:18,476 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2024-12-02 10:51:18,476 INFO L87 Difference]: Start difference. First operand 187 states and 211 transitions. Second operand has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:19,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:19,227 INFO L93 Difference]: Finished difference Result 317 states and 351 transitions. [2024-12-02 10:51:19,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-12-02 10:51:19,227 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-12-02 10:51:19,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:19,228 INFO L225 Difference]: With dead ends: 317 [2024-12-02 10:51:19,228 INFO L226 Difference]: Without dead ends: 302 [2024-12-02 10:51:19,229 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=246, Invalid=2204, Unknown=0, NotChecked=0, Total=2450 [2024-12-02 10:51:19,229 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 155 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:19,229 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 535 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 10:51:19,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2024-12-02 10:51:19,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 232. [2024-12-02 10:51:19,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 230 states have (on average 1.1478260869565218) internal successors, (264), 231 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:19,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 264 transitions. [2024-12-02 10:51:19,235 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 264 transitions. Word has length 38 [2024-12-02 10:51:19,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:19,235 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 264 transitions. [2024-12-02 10:51:19,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:19,235 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 264 transitions. [2024-12-02 10:51:19,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-12-02 10:51:19,235 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:19,235 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:19,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-12-02 10:51:19,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:19,436 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:19,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:19,436 INFO L85 PathProgramCache]: Analyzing trace with hash 278597589, now seen corresponding path program 2 times [2024-12-02 10:51:19,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:19,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661627478] [2024-12-02 10:51:19,436 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:51:19,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:19,452 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:51:19,453 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:19,815 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:19,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:19,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661627478] [2024-12-02 10:51:19,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661627478] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:51:19,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770741588] [2024-12-02 10:51:19,816 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:51:19,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:19,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:51:19,817 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:51:19,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 10:51:19,917 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:51:19,917 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:19,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-12-02 10:51:19,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:51:20,019 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 [2024-12-02 10:51:20,292 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 10:51:20,294 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 10:51:20,294 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 10 [2024-12-02 10:51:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:20,319 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:51:20,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 10:51:20,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-12-02 10:51:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:20,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770741588] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:51:20,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:51:20,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2024-12-02 10:51:20,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378080321] [2024-12-02 10:51:20,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:51:20,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-12-02 10:51:20,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:20,895 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-12-02 10:51:20,896 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1308, Unknown=0, NotChecked=0, Total=1406 [2024-12-02 10:51:20,896 INFO L87 Difference]: Start difference. First operand 232 states and 264 transitions. Second operand has 38 states, 38 states have (on average 2.710526315789474) internal successors, (103), 38 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:22,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:22,663 INFO L93 Difference]: Finished difference Result 389 states and 437 transitions. [2024-12-02 10:51:22,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-12-02 10:51:22,663 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.710526315789474) internal successors, (103), 38 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-12-02 10:51:22,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:22,664 INFO L225 Difference]: With dead ends: 389 [2024-12-02 10:51:22,664 INFO L226 Difference]: Without dead ends: 348 [2024-12-02 10:51:22,665 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=299, Invalid=4813, Unknown=0, NotChecked=0, Total=5112 [2024-12-02 10:51:22,665 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 83 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 1604 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:22,665 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 907 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1604 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-12-02 10:51:22,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2024-12-02 10:51:22,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 323. [2024-12-02 10:51:22,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 321 states have (on average 1.1370716510903427) internal successors, (365), 322 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:22,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 365 transitions. [2024-12-02 10:51:22,671 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 365 transitions. Word has length 38 [2024-12-02 10:51:22,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:22,671 INFO L471 AbstractCegarLoop]: Abstraction has 323 states and 365 transitions. [2024-12-02 10:51:22,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.710526315789474) internal successors, (103), 38 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:22,671 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 365 transitions. [2024-12-02 10:51:22,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-12-02 10:51:22,671 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:22,672 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, 1, 1, 1] [2024-12-02 10:51:22,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-12-02 10:51:22,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:22,872 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:22,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:22,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1694553926, now seen corresponding path program 1 times [2024-12-02 10:51:22,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:22,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17322821] [2024-12-02 10:51:22,873 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:51:22,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:22,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:23,134 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:23,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:23,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17322821] [2024-12-02 10:51:23,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17322821] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:51:23,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404211866] [2024-12-02 10:51:23,134 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:51:23,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:23,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:51:23,136 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:51:23,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-02 10:51:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:23,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-12-02 10:51:23,223 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:51:23,247 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 [2024-12-02 10:51:23,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 10:51:23,950 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:23,950 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:51:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:24,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404211866] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:51:24,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:51:24,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 17] total 45 [2024-12-02 10:51:24,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663866867] [2024-12-02 10:51:24,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:51:24,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-12-02 10:51:24,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:24,564 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-12-02 10:51:24,565 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1830, Unknown=0, NotChecked=0, Total=2070 [2024-12-02 10:51:24,565 INFO L87 Difference]: Start difference. First operand 323 states and 365 transitions. Second operand has 46 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 46 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:25,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:25,560 INFO L93 Difference]: Finished difference Result 381 states and 421 transitions. [2024-12-02 10:51:25,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-12-02 10:51:25,560 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 46 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-12-02 10:51:25,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:25,561 INFO L225 Difference]: With dead ends: 381 [2024-12-02 10:51:25,561 INFO L226 Difference]: Without dead ends: 324 [2024-12-02 10:51:25,562 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=462, Invalid=3444, Unknown=0, NotChecked=0, Total=3906 [2024-12-02 10:51:25,563 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 106 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:25,563 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 481 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1093 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 10:51:25,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2024-12-02 10:51:25,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 286. [2024-12-02 10:51:25,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 284 states have (on average 1.1232394366197183) internal successors, (319), 285 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:25,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 319 transitions. [2024-12-02 10:51:25,567 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 319 transitions. Word has length 40 [2024-12-02 10:51:25,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:25,567 INFO L471 AbstractCegarLoop]: Abstraction has 286 states and 319 transitions. [2024-12-02 10:51:25,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 46 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:25,568 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 319 transitions. [2024-12-02 10:51:25,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-12-02 10:51:25,568 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:25,568 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:25,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-12-02 10:51:25,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-12-02 10:51:25,769 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:25,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:25,769 INFO L85 PathProgramCache]: Analyzing trace with hash 2110026654, now seen corresponding path program 4 times [2024-12-02 10:51:25,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:25,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592486072] [2024-12-02 10:51:25,769 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:51:25,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:25,779 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:51:25,779 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:25,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:25,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592486072] [2024-12-02 10:51:25,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592486072] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:51:25,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376022172] [2024-12-02 10:51:25,957 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:51:25,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:25,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:51:25,959 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:51:25,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-02 10:51:26,035 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:51:26,035 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:26,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-12-02 10:51:26,038 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:51:26,075 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 [2024-12-02 10:51:26,093 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:26,093 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:51:26,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 10:51:26,113 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 [2024-12-02 10:51:26,156 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:26,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376022172] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:51:26,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:51:26,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 19 [2024-12-02 10:51:26,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637214415] [2024-12-02 10:51:26,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:51:26,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-12-02 10:51:26,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:26,157 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-12-02 10:51:26,158 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2024-12-02 10:51:26,158 INFO L87 Difference]: Start difference. First operand 286 states and 319 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:26,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:26,467 INFO L93 Difference]: Finished difference Result 404 states and 445 transitions. [2024-12-02 10:51:26,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-12-02 10:51:26,467 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-12-02 10:51:26,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:26,468 INFO L225 Difference]: With dead ends: 404 [2024-12-02 10:51:26,468 INFO L226 Difference]: Without dead ends: 386 [2024-12-02 10:51:26,468 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2024-12-02 10:51:26,468 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 21 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:26,468 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 589 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 10:51:26,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2024-12-02 10:51:26,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 356. [2024-12-02 10:51:26,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 354 states have (on average 1.1214689265536724) internal successors, (397), 355 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:26,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 397 transitions. [2024-12-02 10:51:26,472 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 397 transitions. Word has length 45 [2024-12-02 10:51:26,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:26,472 INFO L471 AbstractCegarLoop]: Abstraction has 356 states and 397 transitions. [2024-12-02 10:51:26,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:26,472 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 397 transitions. [2024-12-02 10:51:26,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-12-02 10:51:26,472 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:26,472 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:26,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-12-02 10:51:26,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-12-02 10:51:26,673 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:26,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:26,673 INFO L85 PathProgramCache]: Analyzing trace with hash -975631626, now seen corresponding path program 3 times [2024-12-02 10:51:26,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:26,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977769839] [2024-12-02 10:51:26,673 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:51:26,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:26,690 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-12-02 10:51:26,691 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:27,094 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:27,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:27,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977769839] [2024-12-02 10:51:27,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977769839] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:51:27,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502161910] [2024-12-02 10:51:27,094 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:51:27,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:27,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:51:27,095 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:51:27,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-12-02 10:51:27,215 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-12-02 10:51:27,215 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:27,217 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-12-02 10:51:27,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:51:27,326 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 [2024-12-02 10:51:27,503 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:27,504 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:51:27,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 10:51:27,532 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 [2024-12-02 10:51:27,607 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:27,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502161910] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:51:27,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:51:27,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 34 [2024-12-02 10:51:27,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047810070] [2024-12-02 10:51:27,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:51:27,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-12-02 10:51:27,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:27,608 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-12-02 10:51:27,608 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2024-12-02 10:51:27,608 INFO L87 Difference]: Start difference. First operand 356 states and 397 transitions. Second operand has 34 states, 34 states have (on average 2.823529411764706) internal successors, (96), 34 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:29,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:29,355 INFO L93 Difference]: Finished difference Result 608 states and 672 transitions. [2024-12-02 10:51:29,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-12-02 10:51:29,355 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.823529411764706) internal successors, (96), 34 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-12-02 10:51:29,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:29,356 INFO L225 Difference]: With dead ends: 608 [2024-12-02 10:51:29,356 INFO L226 Difference]: Without dead ends: 528 [2024-12-02 10:51:29,357 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1556 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=503, Invalid=6469, Unknown=0, NotChecked=0, Total=6972 [2024-12-02 10:51:29,357 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 128 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:29,357 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 656 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 10:51:29,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2024-12-02 10:51:29,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 471. [2024-12-02 10:51:29,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 469 states have (on average 1.1215351812366738) internal successors, (526), 470 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:29,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 526 transitions. [2024-12-02 10:51:29,362 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 526 transitions. Word has length 46 [2024-12-02 10:51:29,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:29,363 INFO L471 AbstractCegarLoop]: Abstraction has 471 states and 526 transitions. [2024-12-02 10:51:29,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.823529411764706) internal successors, (96), 34 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:29,363 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 526 transitions. [2024-12-02 10:51:29,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-12-02 10:51:29,363 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:29,363 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:29,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-12-02 10:51:29,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-12-02 10:51:29,564 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:29,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:29,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1613416041, now seen corresponding path program 5 times [2024-12-02 10:51:29,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:29,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784664994] [2024-12-02 10:51:29,564 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 10:51:29,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:29,579 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-12-02 10:51:29,579 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:29,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:29,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784664994] [2024-12-02 10:51:29,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784664994] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:51:29,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321954207] [2024-12-02 10:51:29,768 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 10:51:29,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:29,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:51:29,770 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:51:29,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-12-02 10:51:29,880 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-12-02 10:51:29,880 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:29,882 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-12-02 10:51:29,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:51:29,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 10:51:30,109 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:30,109 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:51:30,572 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:30,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321954207] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:51:30,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:51:30,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2024-12-02 10:51:30,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821444889] [2024-12-02 10:51:30,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:51:30,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-12-02 10:51:30,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:30,574 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-12-02 10:51:30,574 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2024-12-02 10:51:30,574 INFO L87 Difference]: Start difference. First operand 471 states and 526 transitions. Second operand has 38 states, 37 states have (on average 3.2972972972972974) internal successors, (122), 38 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:31,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:31,038 INFO L93 Difference]: Finished difference Result 555 states and 618 transitions. [2024-12-02 10:51:31,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-12-02 10:51:31,038 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.2972972972972974) internal successors, (122), 38 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-12-02 10:51:31,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:31,040 INFO L225 Difference]: With dead ends: 555 [2024-12-02 10:51:31,040 INFO L226 Difference]: Without dead ends: 555 [2024-12-02 10:51:31,040 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2024-12-02 10:51:31,040 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 86 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:31,040 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 764 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 10:51:31,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2024-12-02 10:51:31,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 486. [2024-12-02 10:51:31,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 484 states have (on average 1.1260330578512396) internal successors, (545), 485 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:31,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 545 transitions. [2024-12-02 10:51:31,045 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 545 transitions. Word has length 49 [2024-12-02 10:51:31,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:31,045 INFO L471 AbstractCegarLoop]: Abstraction has 486 states and 545 transitions. [2024-12-02 10:51:31,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.2972972972972974) internal successors, (122), 38 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:31,046 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 545 transitions. [2024-12-02 10:51:31,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-12-02 10:51:31,046 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:31,046 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:31,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-12-02 10:51:31,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-12-02 10:51:31,247 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:31,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:31,247 INFO L85 PathProgramCache]: Analyzing trace with hash -298250895, now seen corresponding path program 6 times [2024-12-02 10:51:31,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:31,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333473513] [2024-12-02 10:51:31,247 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 10:51:31,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:31,264 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-12-02 10:51:31,264 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:31,677 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 15 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:31,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:31,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333473513] [2024-12-02 10:51:31,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333473513] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:51:31,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710682736] [2024-12-02 10:51:31,677 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 10:51:31,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:31,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:51:31,679 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:51:31,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-12-02 10:51:31,799 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-12-02 10:51:31,800 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:31,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-12-02 10:51:31,803 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:51:31,933 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 [2024-12-02 10:51:32,090 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:32,090 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:51:32,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 10:51:32,112 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 [2024-12-02 10:51:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:32,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710682736] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:51:32,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:51:32,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 38 [2024-12-02 10:51:32,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479786541] [2024-12-02 10:51:32,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:51:32,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-12-02 10:51:32,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:32,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-12-02 10:51:32,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2024-12-02 10:51:32,188 INFO L87 Difference]: Start difference. First operand 486 states and 545 transitions. Second operand has 38 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 38 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:33,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:33,506 INFO L93 Difference]: Finished difference Result 769 states and 853 transitions. [2024-12-02 10:51:33,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-12-02 10:51:33,506 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 38 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-12-02 10:51:33,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:33,510 INFO L225 Difference]: With dead ends: 769 [2024-12-02 10:51:33,510 INFO L226 Difference]: Without dead ends: 748 [2024-12-02 10:51:33,511 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=372, Invalid=3918, Unknown=0, NotChecked=0, Total=4290 [2024-12-02 10:51:33,512 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 212 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 1609 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 1662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:33,512 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 843 Invalid, 1662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1609 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-12-02 10:51:33,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2024-12-02 10:51:33,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 593. [2024-12-02 10:51:33,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 591 states have (on average 1.1353637901861253) internal successors, (671), 592 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:33,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 671 transitions. [2024-12-02 10:51:33,519 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 671 transitions. Word has length 52 [2024-12-02 10:51:33,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:33,519 INFO L471 AbstractCegarLoop]: Abstraction has 593 states and 671 transitions. [2024-12-02 10:51:33,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 38 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:33,519 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 671 transitions. [2024-12-02 10:51:33,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-12-02 10:51:33,520 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:33,520 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:33,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-12-02 10:51:33,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-12-02 10:51:33,720 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:33,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:33,721 INFO L85 PathProgramCache]: Analyzing trace with hash 954480279, now seen corresponding path program 4 times [2024-12-02 10:51:33,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:33,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619357830] [2024-12-02 10:51:33,721 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:51:33,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:33,738 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:51:33,738 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 46 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:34,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:34,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619357830] [2024-12-02 10:51:34,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619357830] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:51:34,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84884258] [2024-12-02 10:51:34,183 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:51:34,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:34,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:51:34,185 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:51:34,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-12-02 10:51:34,340 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:51:34,340 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:34,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-12-02 10:51:34,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:51:34,473 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 [2024-12-02 10:51:34,677 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:34,678 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:51:34,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 10:51:34,709 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 [2024-12-02 10:51:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:34,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84884258] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:51:34,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:51:34,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 35 [2024-12-02 10:51:34,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788966772] [2024-12-02 10:51:34,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:51:34,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-12-02 10:51:34,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:34,783 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-12-02 10:51:34,783 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1095, Unknown=0, NotChecked=0, Total=1190 [2024-12-02 10:51:34,783 INFO L87 Difference]: Start difference. First operand 593 states and 671 transitions. Second operand has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 35 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:35,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:35,774 INFO L93 Difference]: Finished difference Result 845 states and 950 transitions. [2024-12-02 10:51:35,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-12-02 10:51:35,775 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 35 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2024-12-02 10:51:35,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:35,776 INFO L225 Difference]: With dead ends: 845 [2024-12-02 10:51:35,776 INFO L226 Difference]: Without dead ends: 817 [2024-12-02 10:51:35,777 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=294, Invalid=3246, Unknown=0, NotChecked=0, Total=3540 [2024-12-02 10:51:35,777 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 44 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:35,777 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 760 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 10:51:35,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2024-12-02 10:51:35,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 744. [2024-12-02 10:51:35,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 742 states have (on average 1.1415094339622642) internal successors, (847), 743 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:35,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 847 transitions. [2024-12-02 10:51:35,784 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 847 transitions. Word has length 54 [2024-12-02 10:51:35,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:35,784 INFO L471 AbstractCegarLoop]: Abstraction has 744 states and 847 transitions. [2024-12-02 10:51:35,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 35 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:35,784 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 847 transitions. [2024-12-02 10:51:35,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-12-02 10:51:35,785 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:35,785 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:35,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-12-02 10:51:35,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:35,985 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:35,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:35,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1122126420, now seen corresponding path program 2 times [2024-12-02 10:51:35,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:35,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108787143] [2024-12-02 10:51:35,986 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:51:35,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:36,000 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:51:36,000 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:36,501 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:36,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:36,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108787143] [2024-12-02 10:51:36,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108787143] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:51:36,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466783481] [2024-12-02 10:51:36,501 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:51:36,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:36,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:51:36,503 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:51:36,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-12-02 10:51:36,630 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:51:36,630 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:36,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-12-02 10:51:36,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:51:36,668 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 [2024-12-02 10:51:36,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 10:51:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:37,780 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:51:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:38,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466783481] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:51:38,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:51:38,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 59 [2024-12-02 10:51:38,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165382848] [2024-12-02 10:51:38,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:51:38,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-12-02 10:51:38,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:38,638 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-12-02 10:51:38,638 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=3201, Unknown=0, NotChecked=0, Total=3540 [2024-12-02 10:51:38,639 INFO L87 Difference]: Start difference. First operand 744 states and 847 transitions. Second operand has 60 states, 59 states have (on average 2.711864406779661) internal successors, (160), 60 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:40,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:40,553 INFO L93 Difference]: Finished difference Result 935 states and 1036 transitions. [2024-12-02 10:51:40,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-12-02 10:51:40,554 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 2.711864406779661) internal successors, (160), 60 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2024-12-02 10:51:40,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:40,555 INFO L225 Difference]: With dead ends: 935 [2024-12-02 10:51:40,555 INFO L226 Difference]: Without dead ends: 807 [2024-12-02 10:51:40,556 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2039 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=722, Invalid=6418, Unknown=0, NotChecked=0, Total=7140 [2024-12-02 10:51:40,556 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 142 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 2522 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 2548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:40,556 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 1176 Invalid, 2548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2522 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-12-02 10:51:40,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2024-12-02 10:51:40,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 638. [2024-12-02 10:51:40,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 636 states have (on average 1.1132075471698113) internal successors, (708), 637 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:40,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 708 transitions. [2024-12-02 10:51:40,564 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 708 transitions. Word has length 54 [2024-12-02 10:51:40,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:40,565 INFO L471 AbstractCegarLoop]: Abstraction has 638 states and 708 transitions. [2024-12-02 10:51:40,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 2.711864406779661) internal successors, (160), 60 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:40,565 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 708 transitions. [2024-12-02 10:51:40,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-12-02 10:51:40,566 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:40,566 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:40,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-12-02 10:51:40,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-12-02 10:51:40,766 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:40,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:40,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1672051832, now seen corresponding path program 3 times [2024-12-02 10:51:40,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:40,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465976857] [2024-12-02 10:51:40,767 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:51:40,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:40,794 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-12-02 10:51:40,794 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:41,366 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:41,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:41,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465976857] [2024-12-02 10:51:41,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465976857] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:51:41,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796376782] [2024-12-02 10:51:41,367 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:51:41,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:41,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:51:41,369 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:51:41,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-12-02 10:51:41,525 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-12-02 10:51:41,525 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:41,528 INFO L256 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-12-02 10:51:41,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:51:41,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 10:51:42,649 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:42,649 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:51:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:43,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796376782] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:51:43,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:51:43,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 60 [2024-12-02 10:51:43,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249206919] [2024-12-02 10:51:43,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:51:43,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-12-02 10:51:43,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:43,531 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-12-02 10:51:43,531 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=3283, Unknown=0, NotChecked=0, Total=3660 [2024-12-02 10:51:43,531 INFO L87 Difference]: Start difference. First operand 638 states and 708 transitions. Second operand has 61 states, 60 states have (on average 2.7666666666666666) internal successors, (166), 61 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:45,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:45,481 INFO L93 Difference]: Finished difference Result 873 states and 948 transitions. [2024-12-02 10:51:45,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-12-02 10:51:45,482 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 2.7666666666666666) internal successors, (166), 61 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2024-12-02 10:51:45,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:45,483 INFO L225 Difference]: With dead ends: 873 [2024-12-02 10:51:45,483 INFO L226 Difference]: Without dead ends: 757 [2024-12-02 10:51:45,483 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2578 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=911, Invalid=7645, Unknown=0, NotChecked=0, Total=8556 [2024-12-02 10:51:45,484 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 189 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 2270 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 2308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:45,484 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 997 Invalid, 2308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2270 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-12-02 10:51:45,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2024-12-02 10:51:45,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 640. [2024-12-02 10:51:45,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 638 states have (on average 1.1128526645768024) internal successors, (710), 639 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:45,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 710 transitions. [2024-12-02 10:51:45,489 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 710 transitions. Word has length 56 [2024-12-02 10:51:45,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:45,489 INFO L471 AbstractCegarLoop]: Abstraction has 640 states and 710 transitions. [2024-12-02 10:51:45,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 2.7666666666666666) internal successors, (166), 61 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:45,489 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 710 transitions. [2024-12-02 10:51:45,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-12-02 10:51:45,490 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:45,490 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:45,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-12-02 10:51:45,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-12-02 10:51:45,691 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:45,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:45,691 INFO L85 PathProgramCache]: Analyzing trace with hash -55805058, now seen corresponding path program 5 times [2024-12-02 10:51:45,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:45,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273489678] [2024-12-02 10:51:45,691 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 10:51:45,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:45,712 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-12-02 10:51:45,712 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:46,301 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:46,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:46,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273489678] [2024-12-02 10:51:46,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273489678] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:51:46,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261931224] [2024-12-02 10:51:46,302 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 10:51:46,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:46,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:51:46,303 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:51:46,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-12-02 10:51:46,474 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-12-02 10:51:46,474 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:46,477 INFO L256 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-12-02 10:51:46,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:51:46,533 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 [2024-12-02 10:51:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:47,476 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:51:48,330 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:48,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261931224] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:51:48,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:51:48,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 52 [2024-12-02 10:51:48,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070399481] [2024-12-02 10:51:48,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:51:48,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-12-02 10:51:48,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:48,331 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-12-02 10:51:48,331 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2477, Unknown=0, NotChecked=0, Total=2756 [2024-12-02 10:51:48,331 INFO L87 Difference]: Start difference. First operand 640 states and 710 transitions. Second operand has 53 states, 52 states have (on average 3.3076923076923075) internal successors, (172), 53 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:49,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:49,839 INFO L93 Difference]: Finished difference Result 716 states and 787 transitions. [2024-12-02 10:51:49,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-12-02 10:51:49,840 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 3.3076923076923075) internal successors, (172), 53 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2024-12-02 10:51:49,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:49,841 INFO L225 Difference]: With dead ends: 716 [2024-12-02 10:51:49,841 INFO L226 Difference]: Without dead ends: 716 [2024-12-02 10:51:49,842 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=598, Invalid=5254, Unknown=0, NotChecked=0, Total=5852 [2024-12-02 10:51:49,842 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 81 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1620 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 1642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:49,842 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 948 Invalid, 1642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1620 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-12-02 10:51:49,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2024-12-02 10:51:49,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 647. [2024-12-02 10:51:49,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 645 states have (on average 1.1131782945736435) internal successors, (718), 646 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:49,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 718 transitions. [2024-12-02 10:51:49,847 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 718 transitions. Word has length 58 [2024-12-02 10:51:49,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:49,847 INFO L471 AbstractCegarLoop]: Abstraction has 647 states and 718 transitions. [2024-12-02 10:51:49,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 3.3076923076923075) internal successors, (172), 53 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:49,847 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 718 transitions. [2024-12-02 10:51:49,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-12-02 10:51:49,848 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:49,848 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:49,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-12-02 10:51:50,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:50,048 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:50,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:50,049 INFO L85 PathProgramCache]: Analyzing trace with hash -548153840, now seen corresponding path program 7 times [2024-12-02 10:51:50,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:50,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469563182] [2024-12-02 10:51:50,049 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 10:51:50,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 28 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:50,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:50,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469563182] [2024-12-02 10:51:50,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469563182] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:51:50,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389426619] [2024-12-02 10:51:50,489 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 10:51:50,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:50,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:51:50,491 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:51:50,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-12-02 10:51:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:51:50,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-12-02 10:51:50,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:51:50,816 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 [2024-12-02 10:51:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 13 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:51,060 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:51:51,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 10:51:51,086 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 [2024-12-02 10:51:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 13 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:51,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389426619] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:51:51,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:51:51,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 41 [2024-12-02 10:51:51,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257243247] [2024-12-02 10:51:51,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:51:51,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-12-02 10:51:51,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:51,173 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-12-02 10:51:51,173 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1539, Unknown=0, NotChecked=0, Total=1640 [2024-12-02 10:51:51,173 INFO L87 Difference]: Start difference. First operand 647 states and 718 transitions. Second operand has 41 states, 41 states have (on average 2.975609756097561) internal successors, (122), 41 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:52,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:52,760 INFO L93 Difference]: Finished difference Result 982 states and 1080 transitions. [2024-12-02 10:51:52,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-12-02 10:51:52,760 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.975609756097561) internal successors, (122), 41 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2024-12-02 10:51:52,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:52,762 INFO L225 Difference]: With dead ends: 982 [2024-12-02 10:51:52,762 INFO L226 Difference]: Without dead ends: 958 [2024-12-02 10:51:52,762 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=304, Invalid=4118, Unknown=0, NotChecked=0, Total=4422 [2024-12-02 10:51:52,762 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 152 mSDsluCounter, 1334 mSDsCounter, 0 mSdLazyCounter, 2480 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 2508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:52,763 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 1385 Invalid, 2508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2480 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-12-02 10:51:52,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2024-12-02 10:51:52,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 809. [2024-12-02 10:51:52,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 807 states have (on average 1.117719950433705) internal successors, (902), 808 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:52,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 902 transitions. [2024-12-02 10:51:52,777 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 902 transitions. Word has length 59 [2024-12-02 10:51:52,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:52,777 INFO L471 AbstractCegarLoop]: Abstraction has 809 states and 902 transitions. [2024-12-02 10:51:52,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.975609756097561) internal successors, (122), 41 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:52,777 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 902 transitions. [2024-12-02 10:51:52,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-12-02 10:51:52,779 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:52,779 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:52,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-12-02 10:51:52,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:52,979 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:52,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:52,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1846362753, now seen corresponding path program 8 times [2024-12-02 10:51:52,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:52,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515946720] [2024-12-02 10:51:52,980 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:51:52,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:52,992 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:51:52,992 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 45 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:53,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:53,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515946720] [2024-12-02 10:51:53,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515946720] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:51:53,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041484325] [2024-12-02 10:51:53,531 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:51:53,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:53,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:51:53,533 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:51:53,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-12-02 10:51:53,656 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:51:53,657 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:53,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-12-02 10:51:53,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:51:53,896 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 [2024-12-02 10:51:54,185 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 15 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:54,186 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:51:54,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 10:51:54,219 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 16 treesize of output 12 [2024-12-02 10:51:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 15 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:54,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041484325] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:51:54,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:51:54,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 46 [2024-12-02 10:51:54,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307829550] [2024-12-02 10:51:54,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:51:54,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-12-02 10:51:54,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:54,348 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-12-02 10:51:54,349 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1953, Unknown=0, NotChecked=0, Total=2070 [2024-12-02 10:51:54,349 INFO L87 Difference]: Start difference. First operand 809 states and 902 transitions. Second operand has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 46 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:56,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:51:56,249 INFO L93 Difference]: Finished difference Result 1213 states and 1341 transitions. [2024-12-02 10:51:56,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-12-02 10:51:56,250 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 46 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2024-12-02 10:51:56,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:51:56,252 INFO L225 Difference]: With dead ends: 1213 [2024-12-02 10:51:56,252 INFO L226 Difference]: Without dead ends: 1186 [2024-12-02 10:51:56,253 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=327, Invalid=5075, Unknown=0, NotChecked=0, Total=5402 [2024-12-02 10:51:56,253 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 153 mSDsluCounter, 1766 mSDsCounter, 0 mSdLazyCounter, 3291 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1822 SdHoareTripleChecker+Invalid, 3322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 3291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-12-02 10:51:56,253 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 1822 Invalid, 3322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 3291 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-12-02 10:51:56,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2024-12-02 10:51:56,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 971. [2024-12-02 10:51:56,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 969 states have (on average 1.1259029927760578) internal successors, (1091), 970 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:56,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1091 transitions. [2024-12-02 10:51:56,261 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1091 transitions. Word has length 66 [2024-12-02 10:51:56,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:51:56,261 INFO L471 AbstractCegarLoop]: Abstraction has 971 states and 1091 transitions. [2024-12-02 10:51:56,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 46 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:51:56,261 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1091 transitions. [2024-12-02 10:51:56,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-12-02 10:51:56,262 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:51:56,262 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:51:56,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-12-02 10:51:56,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-12-02 10:51:56,463 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:51:56,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:51:56,463 INFO L85 PathProgramCache]: Analyzing trace with hash -852493070, now seen corresponding path program 6 times [2024-12-02 10:51:56,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:51:56,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514478227] [2024-12-02 10:51:56,463 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 10:51:56,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:51:56,489 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-12-02 10:51:56,489 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:57,439 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 85 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:51:57,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:51:57,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514478227] [2024-12-02 10:51:57,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514478227] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:51:57,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710824558] [2024-12-02 10:51:57,440 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 10:51:57,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:51:57,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:51:57,441 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:51:57,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-12-02 10:51:57,787 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-12-02 10:51:57,787 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:51:57,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-12-02 10:51:57,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:51:58,024 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 [2024-12-02 10:51:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 42 proven. 105 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 10:51:58,319 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:51:58,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 10:51:58,549 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 [2024-12-02 10:51:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 42 proven. 105 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 10:51:58,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710824558] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:51:58,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:51:58,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19, 19] total 59 [2024-12-02 10:51:58,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982670248] [2024-12-02 10:51:58,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:51:58,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-12-02 10:51:58,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:51:58,766 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-12-02 10:51:58,767 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=3204, Unknown=0, NotChecked=0, Total=3422 [2024-12-02 10:51:58,767 INFO L87 Difference]: Start difference. First operand 971 states and 1091 transitions. Second operand has 59 states, 59 states have (on average 3.0508474576271185) internal successors, (180), 59 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:00,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:52:00,551 INFO L93 Difference]: Finished difference Result 1374 states and 1538 transitions. [2024-12-02 10:52:00,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-12-02 10:52:00,552 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.0508474576271185) internal successors, (180), 59 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2024-12-02 10:52:00,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:52:00,557 INFO L225 Difference]: With dead ends: 1374 [2024-12-02 10:52:00,557 INFO L226 Difference]: Without dead ends: 1309 [2024-12-02 10:52:00,558 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2308 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=504, Invalid=7686, Unknown=0, NotChecked=0, Total=8190 [2024-12-02 10:52:00,558 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 78 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 2435 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 2443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-12-02 10:52:00,558 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 985 Invalid, 2443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2435 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-12-02 10:52:00,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2024-12-02 10:52:00,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 1182. [2024-12-02 10:52:00,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1180 states have (on average 1.1305084745762712) internal successors, (1334), 1181 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:00,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1334 transitions. [2024-12-02 10:52:00,567 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1334 transitions. Word has length 66 [2024-12-02 10:52:00,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:52:00,568 INFO L471 AbstractCegarLoop]: Abstraction has 1182 states and 1334 transitions. [2024-12-02 10:52:00,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.0508474576271185) internal successors, (180), 59 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:00,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1334 transitions. [2024-12-02 10:52:00,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-12-02 10:52:00,570 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:52:00,570 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:52:00,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-12-02 10:52:00,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:52:00,770 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:52:00,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:52:00,770 INFO L85 PathProgramCache]: Analyzing trace with hash 201472610, now seen corresponding path program 4 times [2024-12-02 10:52:00,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:52:00,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678487999] [2024-12-02 10:52:00,771 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:52:00,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:52:00,794 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:52:00,794 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:52:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 28 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:01,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:52:01,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678487999] [2024-12-02 10:52:01,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678487999] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:52:01,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915245974] [2024-12-02 10:52:01,418 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:52:01,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:52:01,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:52:01,420 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:52:01,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-12-02 10:52:01,583 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:52:01,583 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:52:01,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-12-02 10:52:01,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:52:01,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 10:52:02,914 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 15 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:02,914 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:52:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 67 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:04,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915245974] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:52:04,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:52:04,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 63 [2024-12-02 10:52:04,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352781938] [2024-12-02 10:52:04,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:52:04,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-12-02 10:52:04,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:52:04,050 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-12-02 10:52:04,050 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=3610, Unknown=0, NotChecked=0, Total=4032 [2024-12-02 10:52:04,051 INFO L87 Difference]: Start difference. First operand 1182 states and 1334 transitions. Second operand has 64 states, 63 states have (on average 3.2063492063492065) internal successors, (202), 64 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:06,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:52:06,134 INFO L93 Difference]: Finished difference Result 1456 states and 1606 transitions. [2024-12-02 10:52:06,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-12-02 10:52:06,134 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 3.2063492063492065) internal successors, (202), 64 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2024-12-02 10:52:06,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:52:06,136 INFO L225 Difference]: With dead ends: 1456 [2024-12-02 10:52:06,136 INFO L226 Difference]: Without dead ends: 1292 [2024-12-02 10:52:06,136 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=899, Invalid=7473, Unknown=0, NotChecked=0, Total=8372 [2024-12-02 10:52:06,137 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 133 mSDsluCounter, 1325 mSDsCounter, 0 mSdLazyCounter, 2757 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 1381 SdHoareTripleChecker+Invalid, 2795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-12-02 10:52:06,137 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 1381 Invalid, 2795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2757 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-12-02 10:52:06,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2024-12-02 10:52:06,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 988. [2024-12-02 10:52:06,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 986 states have (on average 1.1075050709939147) internal successors, (1092), 987 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:06,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1092 transitions. [2024-12-02 10:52:06,150 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1092 transitions. Word has length 68 [2024-12-02 10:52:06,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:52:06,150 INFO L471 AbstractCegarLoop]: Abstraction has 988 states and 1092 transitions. [2024-12-02 10:52:06,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 3.2063492063492065) internal successors, (202), 64 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:06,150 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1092 transitions. [2024-12-02 10:52:06,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-12-02 10:52:06,151 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:52:06,151 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:52:06,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-12-02 10:52:06,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:52:06,351 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:52:06,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:52:06,352 INFO L85 PathProgramCache]: Analyzing trace with hash 720183129, now seen corresponding path program 7 times [2024-12-02 10:52:06,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:52:06,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013780065] [2024-12-02 10:52:06,352 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 10:52:06,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:52:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:52:07,088 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 85 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:07,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:52:07,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013780065] [2024-12-02 10:52:07,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013780065] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:52:07,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833439198] [2024-12-02 10:52:07,088 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 10:52:07,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:52:07,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:52:07,090 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:52:07,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-12-02 10:52:07,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:52:07,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-12-02 10:52:07,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:52:07,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 10:52:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:07,695 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:52:07,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 10:52:07,733 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 [2024-12-02 10:52:07,825 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:07,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833439198] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:52:07,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:52:07,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 43 [2024-12-02 10:52:07,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075386005] [2024-12-02 10:52:07,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:52:07,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-12-02 10:52:07,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:52:07,826 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-12-02 10:52:07,826 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1689, Unknown=0, NotChecked=0, Total=1806 [2024-12-02 10:52:07,826 INFO L87 Difference]: Start difference. First operand 988 states and 1092 transitions. Second operand has 43 states, 43 states have (on average 3.2325581395348837) internal successors, (139), 43 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:09,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:52:09,205 INFO L93 Difference]: Finished difference Result 1480 states and 1620 transitions. [2024-12-02 10:52:09,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-12-02 10:52:09,206 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.2325581395348837) internal successors, (139), 43 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2024-12-02 10:52:09,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:52:09,207 INFO L225 Difference]: With dead ends: 1480 [2024-12-02 10:52:09,207 INFO L226 Difference]: Without dead ends: 1388 [2024-12-02 10:52:09,208 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=308, Invalid=4114, Unknown=0, NotChecked=0, Total=4422 [2024-12-02 10:52:09,208 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 52 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 2114 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1139 SdHoareTripleChecker+Invalid, 2132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-12-02 10:52:09,208 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1139 Invalid, 2132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2114 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-12-02 10:52:09,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2024-12-02 10:52:09,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1184. [2024-12-02 10:52:09,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1182 states have (on average 1.1125211505922166) internal successors, (1315), 1183 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:09,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1315 transitions. [2024-12-02 10:52:09,216 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1315 transitions. Word has length 70 [2024-12-02 10:52:09,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:52:09,216 INFO L471 AbstractCegarLoop]: Abstraction has 1184 states and 1315 transitions. [2024-12-02 10:52:09,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.2325581395348837) internal successors, (139), 43 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:09,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1315 transitions. [2024-12-02 10:52:09,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-12-02 10:52:09,217 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:52:09,217 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:52:09,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-12-02 10:52:09,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:52:09,418 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:52:09,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:52:09,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1674377194, now seen corresponding path program 5 times [2024-12-02 10:52:09,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:52:09,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225125998] [2024-12-02 10:52:09,418 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 10:52:09,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:52:09,438 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-12-02 10:52:09,438 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:52:10,086 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:10,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:52:10,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225125998] [2024-12-02 10:52:10,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225125998] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:52:10,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438068014] [2024-12-02 10:52:10,086 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 10:52:10,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:52:10,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:52:10,088 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:52:10,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-12-02 10:52:10,300 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-12-02 10:52:10,300 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:52:10,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-12-02 10:52:10,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:52:10,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 10:52:10,362 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 [2024-12-02 10:52:11,669 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:11,669 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:52:12,905 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 43 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:12,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438068014] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:52:12,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:52:12,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 63 [2024-12-02 10:52:12,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139506184] [2024-12-02 10:52:12,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:52:12,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-12-02 10:52:12,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:52:12,907 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-12-02 10:52:12,907 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=3675, Unknown=0, NotChecked=0, Total=4032 [2024-12-02 10:52:12,907 INFO L87 Difference]: Start difference. First operand 1184 states and 1315 transitions. Second operand has 64 states, 63 states have (on average 3.3015873015873014) internal successors, (208), 64 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:15,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:52:15,288 INFO L93 Difference]: Finished difference Result 1756 states and 1906 transitions. [2024-12-02 10:52:15,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-12-02 10:52:15,288 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 3.3015873015873014) internal successors, (208), 64 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2024-12-02 10:52:15,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:52:15,290 INFO L225 Difference]: With dead ends: 1756 [2024-12-02 10:52:15,291 INFO L226 Difference]: Without dead ends: 1578 [2024-12-02 10:52:15,291 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2366 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=791, Invalid=8139, Unknown=0, NotChecked=0, Total=8930 [2024-12-02 10:52:15,291 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 112 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 3091 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1536 SdHoareTripleChecker+Invalid, 3122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 3091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-12-02 10:52:15,291 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 1536 Invalid, 3122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 3091 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-12-02 10:52:15,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2024-12-02 10:52:15,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1210. [2024-12-02 10:52:15,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1208 states have (on average 1.1100993377483444) internal successors, (1341), 1209 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:15,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1341 transitions. [2024-12-02 10:52:15,299 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1341 transitions. Word has length 70 [2024-12-02 10:52:15,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:52:15,299 INFO L471 AbstractCegarLoop]: Abstraction has 1210 states and 1341 transitions. [2024-12-02 10:52:15,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 3.3015873015873014) internal successors, (208), 64 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:15,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1341 transitions. [2024-12-02 10:52:15,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-12-02 10:52:15,300 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:52:15,300 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:52:15,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-12-02 10:52:15,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-12-02 10:52:15,501 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:52:15,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:52:15,501 INFO L85 PathProgramCache]: Analyzing trace with hash -462327350, now seen corresponding path program 6 times [2024-12-02 10:52:15,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:52:15,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480341560] [2024-12-02 10:52:15,501 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 10:52:15,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:52:15,530 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-12-02 10:52:15,530 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:52:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 15 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:16,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:52:16,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480341560] [2024-12-02 10:52:16,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480341560] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:52:16,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393891263] [2024-12-02 10:52:16,202 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 10:52:16,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:52:16,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:52:16,204 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:52:16,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-12-02 10:52:16,492 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-12-02 10:52:16,492 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:52:16,495 INFO L256 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 118 conjuncts are in the unsatisfiable core [2024-12-02 10:52:16,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:52:16,535 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 [2024-12-02 10:52:17,956 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:17,956 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:52:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:19,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393891263] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:52:19,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:52:19,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 71 [2024-12-02 10:52:19,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724136509] [2024-12-02 10:52:19,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:52:19,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-12-02 10:52:19,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:52:19,183 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-12-02 10:52:19,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=4638, Unknown=0, NotChecked=0, Total=5112 [2024-12-02 10:52:19,184 INFO L87 Difference]: Start difference. First operand 1210 states and 1341 transitions. Second operand has 72 states, 71 states have (on average 3.0140845070422535) internal successors, (214), 72 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:22,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:52:22,268 INFO L93 Difference]: Finished difference Result 1552 states and 1688 transitions. [2024-12-02 10:52:22,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-12-02 10:52:22,268 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 3.0140845070422535) internal successors, (214), 72 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2024-12-02 10:52:22,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:52:22,270 INFO L225 Difference]: With dead ends: 1552 [2024-12-02 10:52:22,270 INFO L226 Difference]: Without dead ends: 1404 [2024-12-02 10:52:22,271 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3947 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1225, Invalid=11207, Unknown=0, NotChecked=0, Total=12432 [2024-12-02 10:52:22,271 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 300 mSDsluCounter, 1549 mSDsCounter, 0 mSdLazyCounter, 3734 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 1604 SdHoareTripleChecker+Invalid, 3793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 3734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-12-02 10:52:22,271 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 1604 Invalid, 3793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 3734 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-12-02 10:52:22,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2024-12-02 10:52:22,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1212. [2024-12-02 10:52:22,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1210 states have (on average 1.1099173553719008) internal successors, (1343), 1211 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:22,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1343 transitions. [2024-12-02 10:52:22,278 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1343 transitions. Word has length 72 [2024-12-02 10:52:22,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:52:22,278 INFO L471 AbstractCegarLoop]: Abstraction has 1212 states and 1343 transitions. [2024-12-02 10:52:22,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 3.0140845070422535) internal successors, (214), 72 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:22,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1343 transitions. [2024-12-02 10:52:22,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-12-02 10:52:22,279 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:52:22,279 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:52:22,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-12-02 10:52:22,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-12-02 10:52:22,480 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:52:22,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:52:22,480 INFO L85 PathProgramCache]: Analyzing trace with hash -683750526, now seen corresponding path program 9 times [2024-12-02 10:52:22,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:52:22,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688119538] [2024-12-02 10:52:22,480 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:52:22,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:52:22,501 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-12-02 10:52:22,501 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:52:23,089 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 66 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:23,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:52:23,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688119538] [2024-12-02 10:52:23,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688119538] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:52:23,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743372646] [2024-12-02 10:52:23,089 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:52:23,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:52:23,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:52:23,091 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:52:23,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-12-02 10:52:23,268 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-12-02 10:52:23,268 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:52:23,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-12-02 10:52:23,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:52:23,499 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 [2024-12-02 10:52:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 17 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:23,828 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:52:23,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 10:52:23,859 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 [2024-12-02 10:52:23,953 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 17 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:23,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743372646] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:52:23,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:52:23,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 24] total 51 [2024-12-02 10:52:23,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189933140] [2024-12-02 10:52:23,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:52:23,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-12-02 10:52:23,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:52:23,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-12-02 10:52:23,954 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2380, Unknown=0, NotChecked=0, Total=2550 [2024-12-02 10:52:23,955 INFO L87 Difference]: Start difference. First operand 1212 states and 1343 transitions. Second operand has 51 states, 51 states have (on average 2.9411764705882355) internal successors, (150), 51 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:26,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:52:26,146 INFO L93 Difference]: Finished difference Result 1758 states and 1933 transitions. [2024-12-02 10:52:26,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-12-02 10:52:26,146 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.9411764705882355) internal successors, (150), 51 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2024-12-02 10:52:26,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:52:26,148 INFO L225 Difference]: With dead ends: 1758 [2024-12-02 10:52:26,148 INFO L226 Difference]: Without dead ends: 1728 [2024-12-02 10:52:26,148 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1800 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=605, Invalid=7585, Unknown=0, NotChecked=0, Total=8190 [2024-12-02 10:52:26,149 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 280 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 2983 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 1369 SdHoareTripleChecker+Invalid, 3067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:52:26,149 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 1369 Invalid, 3067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2983 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-12-02 10:52:26,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2024-12-02 10:52:26,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1478. [2024-12-02 10:52:26,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1476 states have (on average 1.1151761517615175) internal successors, (1646), 1477 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:26,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 1646 transitions. [2024-12-02 10:52:26,159 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 1646 transitions. Word has length 73 [2024-12-02 10:52:26,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:52:26,159 INFO L471 AbstractCegarLoop]: Abstraction has 1478 states and 1646 transitions. [2024-12-02 10:52:26,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.9411764705882355) internal successors, (150), 51 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:26,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 1646 transitions. [2024-12-02 10:52:26,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-12-02 10:52:26,160 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:52:26,160 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:52:26,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-12-02 10:52:26,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-12-02 10:52:26,361 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:52:26,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:52:26,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1190442560, now seen corresponding path program 8 times [2024-12-02 10:52:26,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:52:26,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337508214] [2024-12-02 10:52:26,361 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:52:26,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:52:26,378 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:52:26,378 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:52:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 45 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:27,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:52:27,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337508214] [2024-12-02 10:52:27,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337508214] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:52:27,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819264165] [2024-12-02 10:52:27,009 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:52:27,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:52:27,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:52:27,011 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:52:27,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-12-02 10:52:27,172 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:52:27,172 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:52:27,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 135 conjuncts are in the unsatisfiable core [2024-12-02 10:52:27,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:52:27,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 10:52:27,235 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 [2024-12-02 10:52:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:28,556 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:52:29,809 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:29,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819264165] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:52:29,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:52:29,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 69 [2024-12-02 10:52:29,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590246560] [2024-12-02 10:52:29,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:52:29,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-12-02 10:52:29,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:52:29,811 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-12-02 10:52:29,811 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=4390, Unknown=0, NotChecked=0, Total=4830 [2024-12-02 10:52:29,811 INFO L87 Difference]: Start difference. First operand 1478 states and 1646 transitions. Second operand has 70 states, 69 states have (on average 3.1884057971014492) internal successors, (220), 70 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:32,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:52:32,149 INFO L93 Difference]: Finished difference Result 1622 states and 1793 transitions. [2024-12-02 10:52:32,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-12-02 10:52:32,150 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 3.1884057971014492) internal successors, (220), 70 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2024-12-02 10:52:32,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:52:32,152 INFO L225 Difference]: With dead ends: 1622 [2024-12-02 10:52:32,152 INFO L226 Difference]: Without dead ends: 1622 [2024-12-02 10:52:32,152 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2780 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=855, Invalid=8651, Unknown=0, NotChecked=0, Total=9506 [2024-12-02 10:52:32,152 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 165 mSDsluCounter, 1372 mSDsCounter, 0 mSdLazyCounter, 2651 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1425 SdHoareTripleChecker+Invalid, 2699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-12-02 10:52:32,153 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1425 Invalid, 2699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2651 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-12-02 10:52:32,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2024-12-02 10:52:32,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1485. [2024-12-02 10:52:32,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1483 states have (on average 1.1153068105192179) internal successors, (1654), 1484 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:32,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 1654 transitions. [2024-12-02 10:52:32,162 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 1654 transitions. Word has length 74 [2024-12-02 10:52:32,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:52:32,162 INFO L471 AbstractCegarLoop]: Abstraction has 1485 states and 1654 transitions. [2024-12-02 10:52:32,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 3.1884057971014492) internal successors, (220), 70 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:32,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 1654 transitions. [2024-12-02 10:52:32,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-12-02 10:52:32,163 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:52:32,163 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:52:32,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-12-02 10:52:32,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-12-02 10:52:32,363 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:52:32,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:52:32,364 INFO L85 PathProgramCache]: Analyzing trace with hash -2004260211, now seen corresponding path program 10 times [2024-12-02 10:52:32,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:52:32,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948797187] [2024-12-02 10:52:32,364 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:52:32,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:52:32,381 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:52:32,382 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:52:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 19 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:32,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:52:32,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948797187] [2024-12-02 10:52:32,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948797187] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:52:32,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962192743] [2024-12-02 10:52:32,836 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:52:32,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:52:32,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:52:32,838 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:52:32,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-12-02 10:52:32,971 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:52:32,971 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:52:32,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-12-02 10:52:32,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:52:33,037 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 [2024-12-02 10:52:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 19 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:33,076 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:52:33,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 10:52:33,110 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 [2024-12-02 10:52:33,192 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 19 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:33,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962192743] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:52:33,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:52:33,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 29 [2024-12-02 10:52:33,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250040092] [2024-12-02 10:52:33,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:52:33,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-12-02 10:52:33,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:52:33,193 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-12-02 10:52:33,193 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=745, Unknown=0, NotChecked=0, Total=812 [2024-12-02 10:52:33,193 INFO L87 Difference]: Start difference. First operand 1485 states and 1654 transitions. Second operand has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:34,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:52:34,059 INFO L93 Difference]: Finished difference Result 1902 states and 2108 transitions. [2024-12-02 10:52:34,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-12-02 10:52:34,060 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2024-12-02 10:52:34,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:52:34,064 INFO L225 Difference]: With dead ends: 1902 [2024-12-02 10:52:34,064 INFO L226 Difference]: Without dead ends: 1869 [2024-12-02 10:52:34,064 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2024-12-02 10:52:34,064 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 44 mSDsluCounter, 1458 mSDsCounter, 0 mSdLazyCounter, 2172 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 2190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-12-02 10:52:34,064 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 1524 Invalid, 2190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2172 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-12-02 10:52:34,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2024-12-02 10:52:34,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1727. [2024-12-02 10:52:34,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1725 states have (on average 1.1205797101449275) internal successors, (1933), 1726 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:34,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 1933 transitions. [2024-12-02 10:52:34,080 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 1933 transitions. Word has length 80 [2024-12-02 10:52:34,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:52:34,080 INFO L471 AbstractCegarLoop]: Abstraction has 1727 states and 1933 transitions. [2024-12-02 10:52:34,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:34,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 1933 transitions. [2024-12-02 10:52:34,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-12-02 10:52:34,081 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:52:34,081 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:52:34,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-12-02 10:52:34,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2024-12-02 10:52:34,282 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:52:34,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:52:34,282 INFO L85 PathProgramCache]: Analyzing trace with hash 746214836, now seen corresponding path program 9 times [2024-12-02 10:52:34,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:52:34,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163110536] [2024-12-02 10:52:34,282 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:52:34,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:52:34,325 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-12-02 10:52:34,325 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:52:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 141 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:35,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:52:35,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163110536] [2024-12-02 10:52:35,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163110536] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:52:35,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181334453] [2024-12-02 10:52:35,239 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:52:35,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:52:35,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:52:35,240 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:52:35,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-12-02 10:52:35,974 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-12-02 10:52:35,974 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:52:35,978 INFO L256 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-12-02 10:52:35,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:52:36,207 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 [2024-12-02 10:52:36,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-12-02 10:52:36,569 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 56 proven. 203 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 10:52:36,569 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:52:36,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 10:52:36,654 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 [2024-12-02 10:52:36,770 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 56 proven. 203 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 10:52:36,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181334453] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:52:36,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:52:36,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 23, 23] total 52 [2024-12-02 10:52:36,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050542128] [2024-12-02 10:52:36,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:52:36,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-12-02 10:52:36,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:52:36,771 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-12-02 10:52:36,771 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2478, Unknown=0, NotChecked=0, Total=2652 [2024-12-02 10:52:36,771 INFO L87 Difference]: Start difference. First operand 1727 states and 1933 transitions. Second operand has 52 states, 52 states have (on average 3.1346153846153846) internal successors, (163), 52 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:38,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:52:38,783 INFO L93 Difference]: Finished difference Result 2409 states and 2684 transitions. [2024-12-02 10:52:38,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-12-02 10:52:38,783 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.1346153846153846) internal successors, (163), 52 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2024-12-02 10:52:38,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:52:38,786 INFO L225 Difference]: With dead ends: 2409 [2024-12-02 10:52:38,786 INFO L226 Difference]: Without dead ends: 2328 [2024-12-02 10:52:38,786 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=465, Invalid=6507, Unknown=0, NotChecked=0, Total=6972 [2024-12-02 10:52:38,786 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 61 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 2786 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1288 SdHoareTripleChecker+Invalid, 2806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:52:38,786 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1288 Invalid, 2806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2786 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-12-02 10:52:38,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2024-12-02 10:52:38,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2020. [2024-12-02 10:52:38,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2018 states have (on average 1.1268582755203171) internal successors, (2274), 2019 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:38,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 2274 transitions. [2024-12-02 10:52:38,799 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 2274 transitions. Word has length 82 [2024-12-02 10:52:38,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:52:38,799 INFO L471 AbstractCegarLoop]: Abstraction has 2020 states and 2274 transitions. [2024-12-02 10:52:38,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.1346153846153846) internal successors, (163), 52 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:38,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 2274 transitions. [2024-12-02 10:52:38,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-12-02 10:52:38,801 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:52:38,801 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:52:38,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-12-02 10:52:39,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:52:39,001 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:52:39,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:52:39,001 INFO L85 PathProgramCache]: Analyzing trace with hash -126236816, now seen corresponding path program 7 times [2024-12-02 10:52:39,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:52:39,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787254585] [2024-12-02 10:52:39,002 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 10:52:39,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:52:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:52:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 66 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:39,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:52:39,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787254585] [2024-12-02 10:52:39,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787254585] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:52:39,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239173407] [2024-12-02 10:52:39,681 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 10:52:39,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:52:39,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:52:39,682 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:52:39,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-12-02 10:52:39,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:52:39,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-12-02 10:52:39,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:52:39,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 10:52:39,889 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 [2024-12-02 10:52:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 91 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:41,488 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:52:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 121 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:43,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239173407] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:52:43,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:52:43,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 75 [2024-12-02 10:52:43,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64657966] [2024-12-02 10:52:43,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:52:43,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-12-02 10:52:43,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:52:43,010 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-12-02 10:52:43,010 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=5089, Unknown=0, NotChecked=0, Total=5700 [2024-12-02 10:52:43,010 INFO L87 Difference]: Start difference. First operand 2020 states and 2274 transitions. Second operand has 76 states, 75 states have (on average 3.2533333333333334) internal successors, (244), 76 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:45,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:52:45,740 INFO L93 Difference]: Finished difference Result 2495 states and 2755 transitions. [2024-12-02 10:52:45,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-12-02 10:52:45,741 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 3.2533333333333334) internal successors, (244), 76 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2024-12-02 10:52:45,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:52:45,745 INFO L225 Difference]: With dead ends: 2495 [2024-12-02 10:52:45,745 INFO L226 Difference]: Without dead ends: 2283 [2024-12-02 10:52:45,746 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3473 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1335, Invalid=11321, Unknown=0, NotChecked=0, Total=12656 [2024-12-02 10:52:45,747 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 169 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 3091 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 1587 SdHoareTripleChecker+Invalid, 3139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 3091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-12-02 10:52:45,747 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 1587 Invalid, 3139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 3091 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-12-02 10:52:45,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2024-12-02 10:52:45,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 1698. [2024-12-02 10:52:45,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1696 states have (on average 1.1084905660377358) internal successors, (1880), 1697 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:45,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 1880 transitions. [2024-12-02 10:52:45,759 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 1880 transitions. Word has length 82 [2024-12-02 10:52:45,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:52:45,759 INFO L471 AbstractCegarLoop]: Abstraction has 1698 states and 1880 transitions. [2024-12-02 10:52:45,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 3.2533333333333334) internal successors, (244), 76 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:45,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 1880 transitions. [2024-12-02 10:52:45,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-12-02 10:52:45,760 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:52:45,760 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:52:45,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-12-02 10:52:45,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:52:45,961 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:52:45,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:52:45,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1683511796, now seen corresponding path program 11 times [2024-12-02 10:52:45,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:52:45,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614405763] [2024-12-02 10:52:45,961 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 10:52:45,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:52:45,980 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-12-02 10:52:45,980 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:52:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 156 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:46,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:52:46,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614405763] [2024-12-02 10:52:46,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614405763] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:52:46,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779390968] [2024-12-02 10:52:46,438 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 10:52:46,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:52:46,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:52:46,440 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:52:46,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-12-02 10:52:46,644 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-12-02 10:52:46,645 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:52:46,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-12-02 10:52:46,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:52:46,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 10:52:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 153 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:47,049 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:52:48,004 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 153 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:48,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779390968] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:52:48,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:52:48,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 63 [2024-12-02 10:52:48,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581700896] [2024-12-02 10:52:48,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:52:48,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-12-02 10:52:48,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:52:48,005 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-12-02 10:52:48,005 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=3426, Unknown=0, NotChecked=0, Total=4032 [2024-12-02 10:52:48,006 INFO L87 Difference]: Start difference. First operand 1698 states and 1880 transitions. Second operand has 64 states, 63 states have (on average 3.3968253968253967) internal successors, (214), 64 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:48,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:52:48,989 INFO L93 Difference]: Finished difference Result 1882 states and 2072 transitions. [2024-12-02 10:52:48,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-12-02 10:52:48,990 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 3.3968253968253967) internal successors, (214), 64 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2024-12-02 10:52:48,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:52:48,994 INFO L225 Difference]: With dead ends: 1882 [2024-12-02 10:52:48,994 INFO L226 Difference]: Without dead ends: 1882 [2024-12-02 10:52:48,995 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1647 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=644, Invalid=3516, Unknown=0, NotChecked=0, Total=4160 [2024-12-02 10:52:48,995 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 146 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 2344 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 2375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-12-02 10:52:48,995 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 1390 Invalid, 2375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2344 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-12-02 10:52:48,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2024-12-02 10:52:49,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1701. [2024-12-02 10:52:49,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1699 states have (on average 1.1082989994114185) internal successors, (1883), 1700 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:49,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 1883 transitions. [2024-12-02 10:52:49,007 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 1883 transitions. Word has length 84 [2024-12-02 10:52:49,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:52:49,007 INFO L471 AbstractCegarLoop]: Abstraction has 1701 states and 1883 transitions. [2024-12-02 10:52:49,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 3.3968253968253967) internal successors, (214), 64 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:49,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 1883 transitions. [2024-12-02 10:52:49,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-12-02 10:52:49,009 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:52:49,009 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:52:49,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-12-02 10:52:49,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:52:49,209 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:52:49,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:52:49,209 INFO L85 PathProgramCache]: Analyzing trace with hash -36968028, now seen corresponding path program 8 times [2024-12-02 10:52:49,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:52:49,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674182540] [2024-12-02 10:52:49,209 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:52:49,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:52:49,229 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:52:49,229 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:52:50,052 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 29 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:50,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:52:50,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674182540] [2024-12-02 10:52:50,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674182540] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:52:50,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562773446] [2024-12-02 10:52:50,052 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:52:50,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:52:50,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:52:50,054 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:52:50,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-12-02 10:52:50,220 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:52:50,220 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:52:50,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-12-02 10:52:50,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:52:50,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 10:52:52,129 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:52,130 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:52:54,086 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:54,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562773446] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:52:54,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:52:54,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28, 29] total 80 [2024-12-02 10:52:54,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260813581] [2024-12-02 10:52:54,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:52:54,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-12-02 10:52:54,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:52:54,087 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-12-02 10:52:54,087 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=5909, Unknown=0, NotChecked=0, Total=6480 [2024-12-02 10:52:54,088 INFO L87 Difference]: Start difference. First operand 1701 states and 1883 transitions. Second operand has 81 states, 80 states have (on average 3.125) internal successors, (250), 81 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:58,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:52:58,920 INFO L93 Difference]: Finished difference Result 2511 states and 2724 transitions. [2024-12-02 10:52:58,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2024-12-02 10:52:58,921 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 3.125) internal successors, (250), 81 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2024-12-02 10:52:58,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:52:58,923 INFO L225 Difference]: With dead ends: 2511 [2024-12-02 10:52:58,923 INFO L226 Difference]: Without dead ends: 2347 [2024-12-02 10:52:58,924 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4943 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1440, Invalid=15852, Unknown=0, NotChecked=0, Total=17292 [2024-12-02 10:52:58,924 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 272 mSDsluCounter, 2369 mSDsCounter, 0 mSdLazyCounter, 5549 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 2444 SdHoareTripleChecker+Invalid, 5593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 5549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-12-02 10:52:58,924 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 2444 Invalid, 5593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 5549 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-12-02 10:52:58,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2024-12-02 10:52:58,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 1743. [2024-12-02 10:52:58,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1743 states, 1741 states have (on average 1.106260769672602) internal successors, (1926), 1742 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:58,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1743 states to 1743 states and 1926 transitions. [2024-12-02 10:52:58,935 INFO L78 Accepts]: Start accepts. Automaton has 1743 states and 1926 transitions. Word has length 84 [2024-12-02 10:52:58,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:52:58,935 INFO L471 AbstractCegarLoop]: Abstraction has 1743 states and 1926 transitions. [2024-12-02 10:52:58,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 80 states have (on average 3.125) internal successors, (250), 81 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:52:58,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1743 states and 1926 transitions. [2024-12-02 10:52:58,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-12-02 10:52:58,936 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:52:58,936 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:52:58,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-12-02 10:52:59,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:52:59,137 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:52:59,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:52:59,137 INFO L85 PathProgramCache]: Analyzing trace with hash 330908240, now seen corresponding path program 9 times [2024-12-02 10:52:59,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:52:59,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758161373] [2024-12-02 10:52:59,137 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:52:59,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:52:59,165 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-12-02 10:52:59,165 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:52:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 21 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:52:59,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:52:59,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758161373] [2024-12-02 10:52:59,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758161373] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:52:59,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079027123] [2024-12-02 10:52:59,982 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:52:59,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:52:59,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:52:59,983 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:52:59,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-12-02 10:53:00,319 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-12-02 10:53:00,319 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:53:00,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 124 conjuncts are in the unsatisfiable core [2024-12-02 10:53:00,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:53:00,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 10:53:02,261 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:53:02,261 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:53:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:53:04,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079027123] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:53:04,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:53:04,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 85 [2024-12-02 10:53:04,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940373145] [2024-12-02 10:53:04,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:53:04,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-12-02 10:53:04,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:53:04,011 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-12-02 10:53:04,011 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=6614, Unknown=0, NotChecked=0, Total=7310 [2024-12-02 10:53:04,011 INFO L87 Difference]: Start difference. First operand 1743 states and 1926 transitions. Second operand has 86 states, 85 states have (on average 2.976470588235294) internal successors, (253), 86 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:53:08,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:53:08,607 INFO L93 Difference]: Finished difference Result 2270 states and 2469 transitions. [2024-12-02 10:53:08,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-12-02 10:53:08,607 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 2.976470588235294) internal successors, (253), 86 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2024-12-02 10:53:08,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:53:08,610 INFO L225 Difference]: With dead ends: 2270 [2024-12-02 10:53:08,610 INFO L226 Difference]: Without dead ends: 2115 [2024-12-02 10:53:08,610 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5360 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1557, Invalid=15735, Unknown=0, NotChecked=0, Total=17292 [2024-12-02 10:53:08,610 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 315 mSDsluCounter, 2264 mSDsCounter, 0 mSdLazyCounter, 5366 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 2336 SdHoareTripleChecker+Invalid, 5411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 5366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-12-02 10:53:08,610 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 2336 Invalid, 5411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 5366 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-12-02 10:53:08,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2024-12-02 10:53:08,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1749. [2024-12-02 10:53:08,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1747 states have (on average 1.1053234115626789) internal successors, (1931), 1748 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:53:08,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 1931 transitions. [2024-12-02 10:53:08,620 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 1931 transitions. Word has length 85 [2024-12-02 10:53:08,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:53:08,620 INFO L471 AbstractCegarLoop]: Abstraction has 1749 states and 1931 transitions. [2024-12-02 10:53:08,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 2.976470588235294) internal successors, (253), 86 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:53:08,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 1931 transitions. [2024-12-02 10:53:08,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-12-02 10:53:08,621 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:53:08,621 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:53:08,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-12-02 10:53:08,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2024-12-02 10:53:08,821 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:53:08,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:53:08,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1946929691, now seen corresponding path program 10 times [2024-12-02 10:53:08,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:53:08,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236617987] [2024-12-02 10:53:08,822 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:53:08,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:53:08,846 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:53:08,846 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:53:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 91 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:53:09,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:53:09,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236617987] [2024-12-02 10:53:09,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236617987] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:53:09,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540841986] [2024-12-02 10:53:09,645 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:53:09,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:53:09,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:53:09,646 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:53:09,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-12-02 10:53:10,153 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:53:10,153 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:53:10,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 147 conjuncts are in the unsatisfiable core [2024-12-02 10:53:10,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:53:10,588 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 [2024-12-02 10:53:11,195 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 27 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:53:11,195 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:53:11,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 10:53:11,686 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 [2024-12-02 10:53:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 27 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:53:12,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540841986] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:53:12,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:53:12,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 71 [2024-12-02 10:53:12,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268505463] [2024-12-02 10:53:12,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:53:12,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-12-02 10:53:12,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:53:12,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-12-02 10:53:12,191 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=4771, Unknown=0, NotChecked=0, Total=4970 [2024-12-02 10:53:12,191 INFO L87 Difference]: Start difference. First operand 1749 states and 1931 transitions. Second operand has 71 states, 71 states have (on average 3.4788732394366195) internal successors, (247), 71 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:53:19,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:53:19,883 INFO L93 Difference]: Finished difference Result 2725 states and 2973 transitions. [2024-12-02 10:53:19,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2024-12-02 10:53:19,883 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.4788732394366195) internal successors, (247), 71 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2024-12-02 10:53:19,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:53:19,886 INFO L225 Difference]: With dead ends: 2725 [2024-12-02 10:53:19,886 INFO L226 Difference]: Without dead ends: 2458 [2024-12-02 10:53:19,887 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6169 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=734, Invalid=26656, Unknown=0, NotChecked=0, Total=27390 [2024-12-02 10:53:19,887 INFO L435 NwaCegarLoop]: 101 mSDtfsCounter, 106 mSDsluCounter, 4645 mSDsCounter, 0 mSdLazyCounter, 11993 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 4746 SdHoareTripleChecker+Invalid, 12011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 11993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-12-02 10:53:19,887 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 4746 Invalid, 12011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 11993 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-12-02 10:53:19,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2024-12-02 10:53:19,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 2040. [2024-12-02 10:53:19,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2040 states, 2038 states have (on average 1.1108930323846908) internal successors, (2264), 2039 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:53:19,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2040 states to 2040 states and 2264 transitions. [2024-12-02 10:53:19,903 INFO L78 Accepts]: Start accepts. Automaton has 2040 states and 2264 transitions. Word has length 86 [2024-12-02 10:53:19,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:53:19,903 INFO L471 AbstractCegarLoop]: Abstraction has 2040 states and 2264 transitions. [2024-12-02 10:53:19,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.4788732394366195) internal successors, (247), 71 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:53:19,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2040 states and 2264 transitions. [2024-12-02 10:53:19,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-12-02 10:53:19,905 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:53:19,905 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:53:19,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-12-02 10:53:20,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-12-02 10:53:20,105 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:53:20,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:53:20,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1166816244, now seen corresponding path program 12 times [2024-12-02 10:53:20,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:53:20,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195962548] [2024-12-02 10:53:20,106 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 10:53:20,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:53:20,146 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-12-02 10:53:20,146 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:53:20,907 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 120 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:53:20,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:53:20,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195962548] [2024-12-02 10:53:20,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195962548] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:53:20,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334246855] [2024-12-02 10:53:20,908 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 10:53:20,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:53:20,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:53:20,909 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:53:20,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-12-02 10:53:21,159 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-12-02 10:53:21,159 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:53:21,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-12-02 10:53:21,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:53:21,457 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 [2024-12-02 10:53:21,900 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 21 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:53:21,900 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:53:21,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 10:53:21,937 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 [2024-12-02 10:53:22,044 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 21 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:53:22,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334246855] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:53:22,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:53:22,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 58 [2024-12-02 10:53:22,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880491665] [2024-12-02 10:53:22,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:53:22,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-12-02 10:53:22,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:53:22,045 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-12-02 10:53:22,045 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=3088, Unknown=0, NotChecked=0, Total=3306 [2024-12-02 10:53:22,045 INFO L87 Difference]: Start difference. First operand 2040 states and 2264 transitions. Second operand has 58 states, 58 states have (on average 3.0689655172413794) internal successors, (178), 58 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:53:24,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:53:24,898 INFO L93 Difference]: Finished difference Result 2849 states and 3138 transitions. [2024-12-02 10:53:24,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-12-02 10:53:24,898 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.0689655172413794) internal successors, (178), 58 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2024-12-02 10:53:24,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:53:24,901 INFO L225 Difference]: With dead ends: 2849 [2024-12-02 10:53:24,901 INFO L226 Difference]: Without dead ends: 2813 [2024-12-02 10:53:24,901 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2504 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=827, Invalid=10303, Unknown=0, NotChecked=0, Total=11130 [2024-12-02 10:53:24,902 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 297 mSDsluCounter, 1880 mSDsCounter, 0 mSdLazyCounter, 4120 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 1939 SdHoareTripleChecker+Invalid, 4203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 4120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-12-02 10:53:24,902 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 1939 Invalid, 4203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 4120 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-12-02 10:53:24,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2813 states. [2024-12-02 10:53:24,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2813 to 2434. [2024-12-02 10:53:24,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2434 states, 2432 states have (on average 1.115953947368421) internal successors, (2714), 2433 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:53:24,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 2714 transitions. [2024-12-02 10:53:24,916 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 2714 transitions. Word has length 87 [2024-12-02 10:53:24,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:53:24,916 INFO L471 AbstractCegarLoop]: Abstraction has 2434 states and 2714 transitions. [2024-12-02 10:53:24,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.0689655172413794) internal successors, (178), 58 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:53:24,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 2714 transitions. [2024-12-02 10:53:24,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-12-02 10:53:24,917 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:53:24,917 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:53:24,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-12-02 10:53:25,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-12-02 10:53:25,118 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:53:25,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:53:25,118 INFO L85 PathProgramCache]: Analyzing trace with hash 274577156, now seen corresponding path program 10 times [2024-12-02 10:53:25,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:53:25,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857419939] [2024-12-02 10:53:25,118 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:53:25,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:53:25,173 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:53:25,173 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:53:26,210 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 33 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:53:26,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:53:26,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857419939] [2024-12-02 10:53:26,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857419939] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:53:26,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747363403] [2024-12-02 10:53:26,211 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:53:26,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:53:26,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:53:26,212 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:53:26,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-12-02 10:53:26,543 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:53:26,543 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:53:26,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 126 conjuncts are in the unsatisfiable core [2024-12-02 10:53:26,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:53:26,583 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 [2024-12-02 10:53:26,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 10:53:28,403 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 51 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:53:28,403 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:53:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 81 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:53:30,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747363403] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:53:30,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:53:30,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25, 25] total 77 [2024-12-02 10:53:30,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185212463] [2024-12-02 10:53:30,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:53:30,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-12-02 10:53:30,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:53:30,265 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-12-02 10:53:30,265 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=478, Invalid=5528, Unknown=0, NotChecked=0, Total=6006 [2024-12-02 10:53:30,265 INFO L87 Difference]: Start difference. First operand 2434 states and 2714 transitions. Second operand has 78 states, 77 states have (on average 3.3636363636363638) internal successors, (259), 78 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:53:34,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:53:34,987 INFO L93 Difference]: Finished difference Result 3003 states and 3291 transitions. [2024-12-02 10:53:34,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-12-02 10:53:34,987 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 3.3636363636363638) internal successors, (259), 78 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2024-12-02 10:53:34,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:53:34,990 INFO L225 Difference]: With dead ends: 3003 [2024-12-02 10:53:34,991 INFO L226 Difference]: Without dead ends: 2819 [2024-12-02 10:53:34,991 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4289 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1424, Invalid=16132, Unknown=0, NotChecked=0, Total=17556 [2024-12-02 10:53:34,991 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 166 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 4487 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 2048 SdHoareTripleChecker+Invalid, 4528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 4487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:53:34,992 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 2048 Invalid, 4528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 4487 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-12-02 10:53:34,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2024-12-02 10:53:35,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2442. [2024-12-02 10:53:35,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2442 states, 2440 states have (on average 1.1155737704918032) internal successors, (2722), 2441 states have internal predecessors, (2722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:53:35,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2442 states to 2442 states and 2722 transitions. [2024-12-02 10:53:35,013 INFO L78 Accepts]: Start accepts. Automaton has 2442 states and 2722 transitions. Word has length 87 [2024-12-02 10:53:35,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:53:35,014 INFO L471 AbstractCegarLoop]: Abstraction has 2442 states and 2722 transitions. [2024-12-02 10:53:35,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 3.3636363636363638) internal successors, (259), 78 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:53:35,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2442 states and 2722 transitions. [2024-12-02 10:53:35,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-12-02 10:53:35,016 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:53:35,016 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:53:35,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-12-02 10:53:35,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-12-02 10:53:35,216 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:53:35,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:53:35,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1411903375, now seen corresponding path program 11 times [2024-12-02 10:53:35,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:53:35,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443437767] [2024-12-02 10:53:35,217 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 10:53:35,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:53:35,256 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-12-02 10:53:35,256 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:53:36,350 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 98 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:53:36,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:53:36,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443437767] [2024-12-02 10:53:36,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443437767] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:53:36,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810091364] [2024-12-02 10:53:36,350 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 10:53:36,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:53:36,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:53:36,352 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:53:36,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-12-02 10:53:36,870 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-12-02 10:53:36,870 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:53:36,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-12-02 10:53:36,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:53:36,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 10:53:36,937 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 [2024-12-02 10:53:38,960 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 1 proven. 291 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:53:38,960 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:53:41,000 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 154 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:53:41,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810091364] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:53:41,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:53:41,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26, 27] total 81 [2024-12-02 10:53:41,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626618695] [2024-12-02 10:53:41,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:53:41,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-12-02 10:53:41,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:53:41,001 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-12-02 10:53:41,001 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=6061, Unknown=0, NotChecked=0, Total=6642 [2024-12-02 10:53:41,001 INFO L87 Difference]: Start difference. First operand 2442 states and 2722 transitions. Second operand has 82 states, 81 states have (on average 3.419753086419753) internal successors, (277), 82 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:53:45,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:53:45,499 INFO L93 Difference]: Finished difference Result 2701 states and 2983 transitions. [2024-12-02 10:53:45,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-12-02 10:53:45,499 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 3.419753086419753) internal successors, (277), 82 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2024-12-02 10:53:45,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:53:45,502 INFO L225 Difference]: With dead ends: 2701 [2024-12-02 10:53:45,502 INFO L226 Difference]: Without dead ends: 2701 [2024-12-02 10:53:45,503 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3870 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1422, Invalid=15348, Unknown=0, NotChecked=0, Total=16770 [2024-12-02 10:53:45,503 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 197 mSDsluCounter, 1987 mSDsCounter, 0 mSdLazyCounter, 4824 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 2048 SdHoareTripleChecker+Invalid, 4881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 4824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:53:45,503 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 2048 Invalid, 4881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 4824 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-12-02 10:53:45,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2024-12-02 10:53:45,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2455. [2024-12-02 10:53:45,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2455 states, 2453 states have (on average 1.1157766000815328) internal successors, (2737), 2454 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:53:45,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2455 states to 2455 states and 2737 transitions. [2024-12-02 10:53:45,515 INFO L78 Accepts]: Start accepts. Automaton has 2455 states and 2737 transitions. Word has length 93 [2024-12-02 10:53:45,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:53:45,515 INFO L471 AbstractCegarLoop]: Abstraction has 2455 states and 2737 transitions. [2024-12-02 10:53:45,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 3.419753086419753) internal successors, (277), 82 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:53:45,515 INFO L276 IsEmpty]: Start isEmpty. Operand 2455 states and 2737 transitions. [2024-12-02 10:53:45,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-12-02 10:53:45,516 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:53:45,517 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:53:45,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-12-02 10:53:45,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:53:45,717 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:53:45,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:53:45,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1278856037, now seen corresponding path program 13 times [2024-12-02 10:53:45,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:53:45,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681589516] [2024-12-02 10:53:45,717 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 10:53:45,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:53:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:53:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 153 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:53:46,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:53:46,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681589516] [2024-12-02 10:53:46,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681589516] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:53:46,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037782297] [2024-12-02 10:53:46,542 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 10:53:46,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:53:46,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:53:46,543 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:53:46,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-12-02 10:53:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:53:46,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-12-02 10:53:46,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:53:47,100 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 [2024-12-02 10:53:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 23 proven. 418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:53:47,662 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:53:47,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 10:53:47,702 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 [2024-12-02 10:53:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 23 proven. 418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:53:47,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037782297] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:53:47,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:53:47,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 61 [2024-12-02 10:53:47,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182840384] [2024-12-02 10:53:47,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:53:47,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-12-02 10:53:47,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:53:47,851 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-12-02 10:53:47,851 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3484, Unknown=0, NotChecked=0, Total=3660 [2024-12-02 10:53:47,851 INFO L87 Difference]: Start difference. First operand 2455 states and 2737 transitions. Second operand has 61 states, 61 states have (on average 3.1475409836065573) internal successors, (192), 61 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:53:51,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:53:51,281 INFO L93 Difference]: Finished difference Result 3382 states and 3744 transitions. [2024-12-02 10:53:51,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-12-02 10:53:51,281 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.1475409836065573) internal successors, (192), 61 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2024-12-02 10:53:51,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:53:51,284 INFO L225 Difference]: With dead ends: 3382 [2024-12-02 10:53:51,284 INFO L226 Difference]: Without dead ends: 3343 [2024-12-02 10:53:51,285 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1807 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=549, Invalid=9753, Unknown=0, NotChecked=0, Total=10302 [2024-12-02 10:53:51,285 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 233 mSDsluCounter, 3124 mSDsCounter, 0 mSdLazyCounter, 6112 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 3197 SdHoareTripleChecker+Invalid, 6160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 6112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:53:51,285 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 3197 Invalid, 6160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 6112 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-12-02 10:53:51,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3343 states. [2024-12-02 10:53:51,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3343 to 2852. [2024-12-02 10:53:51,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2852 states, 2850 states have (on average 1.1224561403508773) internal successors, (3199), 2851 states have internal predecessors, (3199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:53:51,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 3199 transitions. [2024-12-02 10:53:51,306 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 3199 transitions. Word has length 94 [2024-12-02 10:53:51,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:53:51,306 INFO L471 AbstractCegarLoop]: Abstraction has 2852 states and 3199 transitions. [2024-12-02 10:53:51,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.1475409836065573) internal successors, (192), 61 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:53:51,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 3199 transitions. [2024-12-02 10:53:51,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-12-02 10:53:51,308 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:53:51,308 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:53:51,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-12-02 10:53:51,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:53:51,508 INFO L396 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:53:51,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:53:51,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1728718908, now seen corresponding path program 11 times [2024-12-02 10:53:51,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:53:51,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395357267] [2024-12-02 10:53:51,509 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 10:53:51,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:53:51,536 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-12-02 10:53:51,536 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:53:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 98 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:53:52,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:53:52,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395357267] [2024-12-02 10:53:52,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395357267] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:53:52,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516128869] [2024-12-02 10:53:52,796 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 10:53:52,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:53:52,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:53:52,798 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:53:52,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-12-02 10:53:54,179 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-12-02 10:53:54,179 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:53:54,184 INFO L256 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-12-02 10:53:54,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:53:54,544 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 [2024-12-02 10:53:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 30 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:53:55,083 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:53:55,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 10:53:55,130 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 [2024-12-02 10:53:55,258 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 30 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:53:55,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516128869] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:53:55,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:53:55,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27, 27] total 59 [2024-12-02 10:53:55,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863085483] [2024-12-02 10:53:55,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:53:55,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-12-02 10:53:55,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:53:55,259 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-12-02 10:53:55,260 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3258, Unknown=0, NotChecked=0, Total=3422 [2024-12-02 10:53:55,260 INFO L87 Difference]: Start difference. First operand 2852 states and 3199 transitions. Second operand has 59 states, 59 states have (on average 3.2542372881355934) internal successors, (192), 59 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:53:58,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:53:58,496 INFO L93 Difference]: Finished difference Result 3662 states and 4099 transitions. [2024-12-02 10:53:58,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2024-12-02 10:53:58,496 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.2542372881355934) internal successors, (192), 59 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2024-12-02 10:53:58,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:53:58,500 INFO L225 Difference]: With dead ends: 3662 [2024-12-02 10:53:58,500 INFO L226 Difference]: Without dead ends: 3469 [2024-12-02 10:53:58,500 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2208 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=538, Invalid=11018, Unknown=0, NotChecked=0, Total=11556 [2024-12-02 10:53:58,501 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 107 mSDsluCounter, 2048 mSDsCounter, 0 mSdLazyCounter, 4359 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 2101 SdHoareTripleChecker+Invalid, 4378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 4359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-12-02 10:53:58,501 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 2101 Invalid, 4378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 4359 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-12-02 10:53:58,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2024-12-02 10:53:58,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 3240. [2024-12-02 10:53:58,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3240 states, 3238 states have (on average 1.1260037059913526) internal successors, (3646), 3239 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:53:58,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3240 states to 3240 states and 3646 transitions. [2024-12-02 10:53:58,529 INFO L78 Accepts]: Start accepts. Automaton has 3240 states and 3646 transitions. Word has length 94 [2024-12-02 10:53:58,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:53:58,529 INFO L471 AbstractCegarLoop]: Abstraction has 3240 states and 3646 transitions. [2024-12-02 10:53:58,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.2542372881355934) internal successors, (192), 59 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:53:58,529 INFO L276 IsEmpty]: Start isEmpty. Operand 3240 states and 3646 transitions. [2024-12-02 10:53:58,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-12-02 10:53:58,531 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:53:58,531 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:53:58,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-12-02 10:53:58,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:53:58,731 INFO L396 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:53:58,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:53:58,732 INFO L85 PathProgramCache]: Analyzing trace with hash 478286206, now seen corresponding path program 12 times [2024-12-02 10:53:58,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:53:58,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119044603] [2024-12-02 10:53:58,732 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 10:53:58,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:53:58,764 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-12-02 10:53:58,764 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:54:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 121 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:54:00,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:54:00,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119044603] [2024-12-02 10:54:00,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119044603] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:54:00,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109441775] [2024-12-02 10:54:00,223 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 10:54:00,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:54:00,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:54:00,225 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:54:00,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-12-02 10:54:00,643 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-12-02 10:54:00,643 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:54:00,646 INFO L256 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-12-02 10:54:00,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:54:00,702 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 [2024-12-02 10:54:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 153 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:54:03,166 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:54:05,728 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 190 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:54:05,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109441775] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:54:05,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:54:05,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32, 32] total 96 [2024-12-02 10:54:05,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554443285] [2024-12-02 10:54:05,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:54:05,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-12-02 10:54:05,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:54:05,730 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-12-02 10:54:05,730 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=753, Invalid=8559, Unknown=0, NotChecked=0, Total=9312 [2024-12-02 10:54:05,731 INFO L87 Difference]: Start difference. First operand 3240 states and 3646 transitions. Second operand has 97 states, 96 states have (on average 2.9791666666666665) internal successors, (286), 97 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:54:14,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:54:14,486 INFO L93 Difference]: Finished difference Result 4242 states and 4645 transitions. [2024-12-02 10:54:14,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2024-12-02 10:54:14,486 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 96 states have (on average 2.9791666666666665) internal successors, (286), 97 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2024-12-02 10:54:14,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:54:14,489 INFO L225 Difference]: With dead ends: 4242 [2024-12-02 10:54:14,489 INFO L226 Difference]: Without dead ends: 3277 [2024-12-02 10:54:14,491 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11245 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=3718, Invalid=36482, Unknown=0, NotChecked=0, Total=40200 [2024-12-02 10:54:14,491 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 226 mSDsluCounter, 2029 mSDsCounter, 0 mSdLazyCounter, 4138 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 2108 SdHoareTripleChecker+Invalid, 4248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 4138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:54:14,491 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 2108 Invalid, 4248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 4138 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-12-02 10:54:14,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3277 states. [2024-12-02 10:54:14,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3277 to 2676. [2024-12-02 10:54:14,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2676 states, 2674 states have (on average 1.0818997756170532) internal successors, (2893), 2675 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:54:14,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 2893 transitions. [2024-12-02 10:54:14,516 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 2893 transitions. Word has length 96 [2024-12-02 10:54:14,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:54:14,516 INFO L471 AbstractCegarLoop]: Abstraction has 2676 states and 2893 transitions. [2024-12-02 10:54:14,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 96 states have (on average 2.9791666666666665) internal successors, (286), 97 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:54:14,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 2893 transitions. [2024-12-02 10:54:14,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-12-02 10:54:14,518 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:54:14,518 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:54:14,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-12-02 10:54:14,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:54:14,718 INFO L396 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:54:14,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:54:14,719 INFO L85 PathProgramCache]: Analyzing trace with hash 271307501, now seen corresponding path program 13 times [2024-12-02 10:54:14,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:54:14,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116813266] [2024-12-02 10:54:14,719 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 10:54:14,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:54:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:54:15,712 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 66 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:54:15,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:54:15,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116813266] [2024-12-02 10:54:15,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116813266] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:54:15,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847119738] [2024-12-02 10:54:15,712 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 10:54:15,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:54:15,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:54:15,714 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:54:15,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-12-02 10:54:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:54:15,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 161 conjuncts are in the unsatisfiable core [2024-12-02 10:54:15,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:54:15,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 10:54:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 269 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:54:18,137 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:54:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 269 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:54:20,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847119738] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:54:20,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:54:20,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30, 31] total 86 [2024-12-02 10:54:20,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839033388] [2024-12-02 10:54:20,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:54:20,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-12-02 10:54:20,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:54:20,105 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-12-02 10:54:20,105 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=6949, Unknown=0, NotChecked=0, Total=7482 [2024-12-02 10:54:20,106 INFO L87 Difference]: Start difference. First operand 2676 states and 2893 transitions. Second operand has 87 states, 86 states have (on average 3.3255813953488373) internal successors, (286), 87 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:54:24,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:54:24,861 INFO L93 Difference]: Finished difference Result 3145 states and 3365 transitions. [2024-12-02 10:54:24,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-12-02 10:54:24,861 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 3.3255813953488373) internal successors, (286), 87 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2024-12-02 10:54:24,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:54:24,863 INFO L225 Difference]: With dead ends: 3145 [2024-12-02 10:54:24,863 INFO L226 Difference]: Without dead ends: 3048 [2024-12-02 10:54:24,864 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5652 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1600, Invalid=17860, Unknown=0, NotChecked=0, Total=19460 [2024-12-02 10:54:24,864 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 419 mSDsluCounter, 2463 mSDsCounter, 0 mSdLazyCounter, 5976 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 2527 SdHoareTripleChecker+Invalid, 6064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 5976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-12-02 10:54:24,864 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 2527 Invalid, 6064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 5976 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-12-02 10:54:24,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3048 states. [2024-12-02 10:54:24,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3048 to 2683. [2024-12-02 10:54:24,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2683 states, 2681 states have (on average 1.080939947780679) internal successors, (2898), 2682 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:54:24,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2683 states to 2683 states and 2898 transitions. [2024-12-02 10:54:24,889 INFO L78 Accepts]: Start accepts. Automaton has 2683 states and 2898 transitions. Word has length 96 [2024-12-02 10:54:24,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:54:24,889 INFO L471 AbstractCegarLoop]: Abstraction has 2683 states and 2898 transitions. [2024-12-02 10:54:24,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 3.3255813953488373) internal successors, (286), 87 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:54:24,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2683 states and 2898 transitions. [2024-12-02 10:54:24,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-12-02 10:54:24,892 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:54:24,892 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:54:24,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-12-02 10:54:25,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:54:25,092 INFO L396 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:54:25,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:54:25,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1852684238, now seen corresponding path program 14 times [2024-12-02 10:54:25,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:54:25,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170719953] [2024-12-02 10:54:25,093 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:54:25,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:54:25,118 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:54:25,119 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:54:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 67 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:54:25,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:54:25,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170719953] [2024-12-02 10:54:25,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170719953] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:54:25,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230069232] [2024-12-02 10:54:25,970 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:54:25,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:54:25,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:54:25,972 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:54:25,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-12-02 10:54:26,175 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:54:26,175 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:54:26,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 127 conjuncts are in the unsatisfiable core [2024-12-02 10:54:26,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:54:26,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 10:54:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:54:28,522 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:54:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:54:30,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230069232] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:54:30,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:54:30,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 33, 33] total 94 [2024-12-02 10:54:30,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908279506] [2024-12-02 10:54:30,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:54:30,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2024-12-02 10:54:30,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:54:30,999 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2024-12-02 10:54:30,999 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=8173, Unknown=0, NotChecked=0, Total=8930 [2024-12-02 10:54:30,999 INFO L87 Difference]: Start difference. First operand 2683 states and 2898 transitions. Second operand has 95 states, 94 states have (on average 3.106382978723404) internal successors, (292), 95 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:54:37,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:54:37,149 INFO L93 Difference]: Finished difference Result 3517 states and 3740 transitions. [2024-12-02 10:54:37,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2024-12-02 10:54:37,149 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 3.106382978723404) internal successors, (292), 95 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2024-12-02 10:54:37,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:54:37,150 INFO L225 Difference]: With dead ends: 3517 [2024-12-02 10:54:37,150 INFO L226 Difference]: Without dead ends: 3264 [2024-12-02 10:54:37,151 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7269 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1973, Invalid=22519, Unknown=0, NotChecked=0, Total=24492 [2024-12-02 10:54:37,151 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 367 mSDsluCounter, 3184 mSDsCounter, 0 mSdLazyCounter, 7346 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 3268 SdHoareTripleChecker+Invalid, 7390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 7346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-12-02 10:54:37,152 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 3268 Invalid, 7390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 7346 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-12-02 10:54:37,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3264 states. [2024-12-02 10:54:37,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3264 to 2495. [2024-12-02 10:54:37,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 2493 states have (on average 1.0742077817890092) internal successors, (2678), 2494 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:54:37,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 2678 transitions. [2024-12-02 10:54:37,166 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 2678 transitions. Word has length 98 [2024-12-02 10:54:37,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:54:37,166 INFO L471 AbstractCegarLoop]: Abstraction has 2495 states and 2678 transitions. [2024-12-02 10:54:37,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 3.106382978723404) internal successors, (292), 95 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:54:37,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 2678 transitions. [2024-12-02 10:54:37,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-12-02 10:54:37,167 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:54:37,167 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:54:37,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-12-02 10:54:37,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2024-12-02 10:54:37,369 INFO L396 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:54:37,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:54:37,369 INFO L85 PathProgramCache]: Analyzing trace with hash -767188639, now seen corresponding path program 1 times [2024-12-02 10:54:37,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:54:37,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304837503] [2024-12-02 10:54:37,370 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:54:37,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:54:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:54:38,470 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 120 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:54:38,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:54:38,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304837503] [2024-12-02 10:54:38,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304837503] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:54:38,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335403741] [2024-12-02 10:54:38,470 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:54:38,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:54:38,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:54:38,472 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:54:38,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-12-02 10:54:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:54:38,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 164 conjuncts are in the unsatisfiable core [2024-12-02 10:54:38,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:54:38,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 10:54:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 153 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:54:40,780 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:54:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 190 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:54:42,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335403741] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:54:42,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:54:42,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 82 [2024-12-02 10:54:42,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012091053] [2024-12-02 10:54:42,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:54:42,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-12-02 10:54:42,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:54:42,688 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-12-02 10:54:42,689 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=693, Invalid=6113, Unknown=0, NotChecked=0, Total=6806 [2024-12-02 10:54:42,689 INFO L87 Difference]: Start difference. First operand 2495 states and 2678 transitions. Second operand has 83 states, 82 states have (on average 3.5609756097560976) internal successors, (292), 83 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:54:46,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:54:46,022 INFO L93 Difference]: Finished difference Result 2929 states and 3123 transitions. [2024-12-02 10:54:46,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-12-02 10:54:46,023 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 3.5609756097560976) internal successors, (292), 83 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2024-12-02 10:54:46,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:54:46,024 INFO L225 Difference]: With dead ends: 2929 [2024-12-02 10:54:46,024 INFO L226 Difference]: Without dead ends: 2929 [2024-12-02 10:54:46,024 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4333 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1419, Invalid=13833, Unknown=0, NotChecked=0, Total=15252 [2024-12-02 10:54:46,025 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 148 mSDsluCounter, 1717 mSDsCounter, 0 mSdLazyCounter, 3583 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1780 SdHoareTripleChecker+Invalid, 3628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 3583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-12-02 10:54:46,025 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 1780 Invalid, 3628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 3583 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-12-02 10:54:46,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2929 states. [2024-12-02 10:54:46,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2929 to 2493. [2024-12-02 10:54:46,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2493 states, 2491 states have (on average 1.074267362505018) internal successors, (2676), 2492 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:54:46,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2493 states to 2493 states and 2676 transitions. [2024-12-02 10:54:46,036 INFO L78 Accepts]: Start accepts. Automaton has 2493 states and 2676 transitions. Word has length 98 [2024-12-02 10:54:46,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:54:46,036 INFO L471 AbstractCegarLoop]: Abstraction has 2493 states and 2676 transitions. [2024-12-02 10:54:46,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 3.5609756097560976) internal successors, (292), 83 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:54:46,037 INFO L276 IsEmpty]: Start isEmpty. Operand 2493 states and 2676 transitions. [2024-12-02 10:54:46,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-12-02 10:54:46,038 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:54:46,038 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:54:46,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-12-02 10:54:46,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2024-12-02 10:54:46,239 INFO L396 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:54:46,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:54:46,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1106650394, now seen corresponding path program 15 times [2024-12-02 10:54:46,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:54:46,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000380799] [2024-12-02 10:54:46,240 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:54:46,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:54:46,292 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-12-02 10:54:46,292 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:54:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 43 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:54:47,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:54:47,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000380799] [2024-12-02 10:54:47,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000380799] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:54:47,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539591271] [2024-12-02 10:54:47,376 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:54:47,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:54:47,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:54:47,377 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:54:47,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-12-02 10:54:48,282 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-12-02 10:54:48,282 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:54:48,288 INFO L256 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 144 conjuncts are in the unsatisfiable core [2024-12-02 10:54:48,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:54:48,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 10:54:50,656 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:54:50,656 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:54:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:54:52,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539591271] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:54:52,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:54:52,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 98 [2024-12-02 10:54:52,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258272915] [2024-12-02 10:54:52,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:54:52,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2024-12-02 10:54:52,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:54:52,708 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2024-12-02 10:54:52,709 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=893, Invalid=8809, Unknown=0, NotChecked=0, Total=9702 [2024-12-02 10:54:52,709 INFO L87 Difference]: Start difference. First operand 2493 states and 2676 transitions. Second operand has 99 states, 98 states have (on average 3.0408163265306123) internal successors, (298), 99 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:54:58,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:54:58,281 INFO L93 Difference]: Finished difference Result 3323 states and 3524 transitions. [2024-12-02 10:54:58,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-12-02 10:54:58,281 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 98 states have (on average 3.0408163265306123) internal successors, (298), 99 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2024-12-02 10:54:58,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:54:58,283 INFO L225 Difference]: With dead ends: 3323 [2024-12-02 10:54:58,283 INFO L226 Difference]: Without dead ends: 3100 [2024-12-02 10:54:58,284 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7347 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1990, Invalid=21266, Unknown=0, NotChecked=0, Total=23256 [2024-12-02 10:54:58,284 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 382 mSDsluCounter, 2845 mSDsCounter, 0 mSdLazyCounter, 6855 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 2923 SdHoareTripleChecker+Invalid, 6905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 6855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:54:58,284 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 2923 Invalid, 6905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 6855 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-12-02 10:54:58,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2024-12-02 10:54:58,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 2513. [2024-12-02 10:54:58,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2513 states, 2511 states have (on average 1.0728793309438471) internal successors, (2694), 2512 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:54:58,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2513 states to 2513 states and 2694 transitions. [2024-12-02 10:54:58,298 INFO L78 Accepts]: Start accepts. Automaton has 2513 states and 2694 transitions. Word has length 100 [2024-12-02 10:54:58,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:54:58,298 INFO L471 AbstractCegarLoop]: Abstraction has 2513 states and 2694 transitions. [2024-12-02 10:54:58,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 98 states have (on average 3.0408163265306123) internal successors, (298), 99 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:54:58,298 INFO L276 IsEmpty]: Start isEmpty. Operand 2513 states and 2694 transitions. [2024-12-02 10:54:58,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-12-02 10:54:58,300 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:54:58,300 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:54:58,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-12-02 10:54:58,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2024-12-02 10:54:58,500 INFO L396 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:54:58,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:54:58,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1227026278, now seen corresponding path program 14 times [2024-12-02 10:54:58,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:54:58,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321411290] [2024-12-02 10:54:58,500 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:54:58,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:54:58,516 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:54:58,516 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:54:59,423 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 190 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:54:59,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:54:59,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321411290] [2024-12-02 10:54:59,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321411290] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:54:59,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966149646] [2024-12-02 10:54:59,424 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:54:59,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:54:59,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:54:59,425 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:54:59,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-12-02 10:54:59,624 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:54:59,624 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:54:59,626 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-12-02 10:54:59,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:55:00,083 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 [2024-12-02 10:55:00,721 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 25 proven. 498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:55:00,721 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:55:00,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 10:55:00,765 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 [2024-12-02 10:55:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 25 proven. 498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:55:00,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966149646] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:55:00,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:55:00,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 66 [2024-12-02 10:55:00,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827167809] [2024-12-02 10:55:00,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:55:00,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-12-02 10:55:00,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:55:00,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-12-02 10:55:00,913 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=4093, Unknown=0, NotChecked=0, Total=4290 [2024-12-02 10:55:00,914 INFO L87 Difference]: Start difference. First operand 2513 states and 2694 transitions. Second operand has 66 states, 66 states have (on average 3.121212121212121) internal successors, (206), 66 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:55:04,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:55:04,487 INFO L93 Difference]: Finished difference Result 3240 states and 3460 transitions. [2024-12-02 10:55:04,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-12-02 10:55:04,488 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.121212121212121) internal successors, (206), 66 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2024-12-02 10:55:04,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:55:04,489 INFO L225 Difference]: With dead ends: 3240 [2024-12-02 10:55:04,490 INFO L226 Difference]: Without dead ends: 3198 [2024-12-02 10:55:04,490 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2099 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=582, Invalid=11190, Unknown=0, NotChecked=0, Total=11772 [2024-12-02 10:55:04,491 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 136 mSDsluCounter, 2280 mSDsCounter, 0 mSdLazyCounter, 4844 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 2334 SdHoareTripleChecker+Invalid, 4863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 4844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:55:04,491 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 2334 Invalid, 4863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 4844 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-12-02 10:55:04,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2024-12-02 10:55:04,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 3010. [2024-12-02 10:55:04,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3008 states have (on average 1.0704787234042554) internal successors, (3220), 3009 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:55:04,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 3220 transitions. [2024-12-02 10:55:04,514 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 3220 transitions. Word has length 101 [2024-12-02 10:55:04,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:55:04,514 INFO L471 AbstractCegarLoop]: Abstraction has 3010 states and 3220 transitions. [2024-12-02 10:55:04,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.121212121212121) internal successors, (206), 66 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:55:04,514 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 3220 transitions. [2024-12-02 10:55:04,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-12-02 10:55:04,516 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:55:04,516 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:55:04,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-12-02 10:55:04,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:55:04,716 INFO L396 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:55:04,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:55:04,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1919994266, now seen corresponding path program 16 times [2024-12-02 10:55:04,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:55:04,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180531034] [2024-12-02 10:55:04,717 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:55:04,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:55:04,776 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:55:04,776 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:55:06,058 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 72 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:55:06,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:55:06,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180531034] [2024-12-02 10:55:06,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180531034] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:55:06,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031567557] [2024-12-02 10:55:06,058 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:55:06,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:55:06,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:55:06,060 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:55:06,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-12-02 10:55:06,811 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:55:06,811 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:55:06,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 159 conjuncts are in the unsatisfiable core [2024-12-02 10:55:06,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:55:06,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 10:55:10,078 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:55:10,078 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:55:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:55:13,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031567557] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:55:13,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:55:13,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 33, 33] total 94 [2024-12-02 10:55:13,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461032324] [2024-12-02 10:55:13,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:55:13,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2024-12-02 10:55:13,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:55:13,245 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2024-12-02 10:55:13,245 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=8256, Unknown=0, NotChecked=0, Total=8930 [2024-12-02 10:55:13,245 INFO L87 Difference]: Start difference. First operand 3010 states and 3220 transitions. Second operand has 95 states, 94 states have (on average 3.234042553191489) internal successors, (304), 95 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:55:20,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:55:20,218 INFO L93 Difference]: Finished difference Result 3495 states and 3711 transitions. [2024-12-02 10:55:20,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-12-02 10:55:20,218 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 3.234042553191489) internal successors, (304), 95 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2024-12-02 10:55:20,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:55:20,220 INFO L225 Difference]: With dead ends: 3495 [2024-12-02 10:55:20,220 INFO L226 Difference]: Without dead ends: 3368 [2024-12-02 10:55:20,221 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7544 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=2040, Invalid=22452, Unknown=0, NotChecked=0, Total=24492 [2024-12-02 10:55:20,221 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 510 mSDsluCounter, 2988 mSDsCounter, 0 mSdLazyCounter, 7101 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 3058 SdHoareTripleChecker+Invalid, 7199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 7101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-12-02 10:55:20,221 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 3058 Invalid, 7199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 7101 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-12-02 10:55:20,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2024-12-02 10:55:20,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 3013. [2024-12-02 10:55:20,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 3011 states have (on average 1.0700763865825307) internal successors, (3222), 3012 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:55:20,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 3222 transitions. [2024-12-02 10:55:20,236 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 3222 transitions. Word has length 102 [2024-12-02 10:55:20,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:55:20,236 INFO L471 AbstractCegarLoop]: Abstraction has 3013 states and 3222 transitions. [2024-12-02 10:55:20,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 3.234042553191489) internal successors, (304), 95 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:55:20,236 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 3222 transitions. [2024-12-02 10:55:20,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-12-02 10:55:20,238 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:55:20,238 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:55:20,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-12-02 10:55:20,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:55:20,438 INFO L396 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:55:20,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:55:20,439 INFO L85 PathProgramCache]: Analyzing trace with hash -976861545, now seen corresponding path program 12 times [2024-12-02 10:55:20,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:55:20,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482830499] [2024-12-02 10:55:20,439 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 10:55:20,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:55:20,521 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-12-02 10:55:20,521 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:55:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 255 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:55:22,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:55:22,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482830499] [2024-12-02 10:55:22,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482830499] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:55:22,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440890] [2024-12-02 10:55:22,275 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 10:55:22,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:55:22,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:55:22,277 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:55:22,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-12-02 10:55:26,298 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-12-02 10:55:26,298 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:55:26,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 174 conjuncts are in the unsatisfiable core [2024-12-02 10:55:26,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:55:26,999 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 [2024-12-02 10:55:27,952 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 77 proven. 410 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 10:55:27,952 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:55:28,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 10:55:28,755 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 [2024-12-02 10:55:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 77 proven. 410 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 10:55:29,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440890] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:55:29,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:55:29,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 29, 29] total 88 [2024-12-02 10:55:29,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367073064] [2024-12-02 10:55:29,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:55:29,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-12-02 10:55:29,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:55:29,540 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-12-02 10:55:29,540 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=7339, Unknown=0, NotChecked=0, Total=7656 [2024-12-02 10:55:29,540 INFO L87 Difference]: Start difference. First operand 3013 states and 3222 transitions. Second operand has 88 states, 88 states have (on average 3.3636363636363638) internal successors, (296), 88 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:55:36,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:55:36,548 INFO L93 Difference]: Finished difference Result 4347 states and 4633 transitions. [2024-12-02 10:55:36,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-12-02 10:55:36,549 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.3636363636363638) internal successors, (296), 88 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2024-12-02 10:55:36,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:55:36,551 INFO L225 Difference]: With dead ends: 4347 [2024-12-02 10:55:36,551 INFO L226 Difference]: Without dead ends: 4156 [2024-12-02 10:55:36,553 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5447 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1252, Invalid=25154, Unknown=0, NotChecked=0, Total=26406 [2024-12-02 10:55:36,553 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 78 mSDsluCounter, 2157 mSDsCounter, 0 mSdLazyCounter, 5437 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 2204 SdHoareTripleChecker+Invalid, 5466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 5437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-12-02 10:55:36,553 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 2204 Invalid, 5466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 5437 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-12-02 10:55:36,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4156 states. [2024-12-02 10:55:36,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4156 to 3415. [2024-12-02 10:55:36,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3415 states, 3413 states have (on average 1.0732493407559331) internal successors, (3663), 3414 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:55:36,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3415 states to 3415 states and 3663 transitions. [2024-12-02 10:55:36,583 INFO L78 Accepts]: Start accepts. Automaton has 3415 states and 3663 transitions. Word has length 106 [2024-12-02 10:55:36,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:55:36,583 INFO L471 AbstractCegarLoop]: Abstraction has 3415 states and 3663 transitions. [2024-12-02 10:55:36,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.3636363636363638) internal successors, (296), 88 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:55:36,584 INFO L276 IsEmpty]: Start isEmpty. Operand 3415 states and 3663 transitions. [2024-12-02 10:55:36,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-12-02 10:55:36,586 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:55:36,586 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:55:36,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-12-02 10:55:36,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:55:36,786 INFO L396 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:55:36,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:55:36,787 INFO L85 PathProgramCache]: Analyzing trace with hash 294796201, now seen corresponding path program 15 times [2024-12-02 10:55:36,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:55:36,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220406353] [2024-12-02 10:55:36,787 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:55:36,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:55:36,834 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-12-02 10:55:36,834 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:55:38,069 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 231 proven. 381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:55:38,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:55:38,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220406353] [2024-12-02 10:55:38,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220406353] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:55:38,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036219771] [2024-12-02 10:55:38,069 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:55:38,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:55:38,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:55:38,071 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:55:38,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-12-02 10:55:38,662 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-12-02 10:55:38,662 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:55:38,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-12-02 10:55:38,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:55:39,209 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 [2024-12-02 10:55:39,923 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 27 proven. 585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:55:39,924 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:55:39,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 10:55:39,975 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 [2024-12-02 10:55:40,118 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 27 proven. 585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:55:40,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036219771] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:55:40,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:55:40,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34, 34] total 71 [2024-12-02 10:55:40,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573344639] [2024-12-02 10:55:40,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:55:40,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-12-02 10:55:40,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:55:40,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-12-02 10:55:40,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=4660, Unknown=0, NotChecked=0, Total=4970 [2024-12-02 10:55:40,120 INFO L87 Difference]: Start difference. First operand 3415 states and 3663 transitions. Second operand has 71 states, 71 states have (on average 3.0985915492957745) internal successors, (220), 71 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:55:44,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:55:44,145 INFO L93 Difference]: Finished difference Result 4357 states and 4668 transitions. [2024-12-02 10:55:44,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-12-02 10:55:44,145 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.0985915492957745) internal successors, (220), 71 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2024-12-02 10:55:44,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:55:44,147 INFO L225 Difference]: With dead ends: 4357 [2024-12-02 10:55:44,147 INFO L226 Difference]: Without dead ends: 4312 [2024-12-02 10:55:44,148 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3900 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1175, Invalid=15855, Unknown=0, NotChecked=0, Total=17030 [2024-12-02 10:55:44,148 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 218 mSDsluCounter, 2057 mSDsCounter, 0 mSdLazyCounter, 4541 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 2111 SdHoareTripleChecker+Invalid, 4593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 4541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-12-02 10:55:44,148 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 2111 Invalid, 4593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 4541 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-12-02 10:55:44,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2024-12-02 10:55:44,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 3961. [2024-12-02 10:55:44,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3961 states, 3959 states have (on average 1.0740085880272796) internal successors, (4252), 3960 states have internal predecessors, (4252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:55:44,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3961 states to 3961 states and 4252 transitions. [2024-12-02 10:55:44,172 INFO L78 Accepts]: Start accepts. Automaton has 3961 states and 4252 transitions. Word has length 108 [2024-12-02 10:55:44,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:55:44,172 INFO L471 AbstractCegarLoop]: Abstraction has 3961 states and 4252 transitions. [2024-12-02 10:55:44,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.0985915492957745) internal successors, (220), 71 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:55:44,172 INFO L276 IsEmpty]: Start isEmpty. Operand 3961 states and 4252 transitions. [2024-12-02 10:55:44,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-12-02 10:55:44,174 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:55:44,174 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:55:44,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-12-02 10:55:44,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:55:44,374 INFO L396 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:55:44,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:55:44,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1129662978, now seen corresponding path program 13 times [2024-12-02 10:55:44,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:55:44,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030281751] [2024-12-02 10:55:44,375 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 10:55:44,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:55:44,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:55:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 265 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:55:45,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:55:45,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030281751] [2024-12-02 10:55:45,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030281751] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:55:45,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473107154] [2024-12-02 10:55:45,828 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 10:55:45,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:55:45,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:55:45,829 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:55:45,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-12-02 10:55:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:55:46,145 INFO L256 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 130 conjuncts are in the unsatisfiable core [2024-12-02 10:55:46,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:55:46,712 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 [2024-12-02 10:55:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 36 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:55:47,533 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:55:47,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 10:55:47,621 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 [2024-12-02 10:55:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 36 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:55:47,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473107154] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:55:47,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:55:47,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 63 [2024-12-02 10:55:47,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475121676] [2024-12-02 10:55:47,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:55:47,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-12-02 10:55:47,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:55:47,814 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-12-02 10:55:47,814 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=3704, Unknown=0, NotChecked=0, Total=3906 [2024-12-02 10:55:47,814 INFO L87 Difference]: Start difference. First operand 3961 states and 4252 transitions. Second operand has 63 states, 63 states have (on average 3.4761904761904763) internal successors, (219), 63 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:55:51,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:55:51,755 INFO L93 Difference]: Finished difference Result 5508 states and 5887 transitions. [2024-12-02 10:55:51,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-12-02 10:55:51,755 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.4761904761904763) internal successors, (219), 63 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2024-12-02 10:55:51,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:55:51,758 INFO L225 Difference]: With dead ends: 5508 [2024-12-02 10:55:51,758 INFO L226 Difference]: Without dead ends: 5404 [2024-12-02 10:55:51,758 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1756 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=608, Invalid=9694, Unknown=0, NotChecked=0, Total=10302 [2024-12-02 10:55:51,758 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 75 mSDsluCounter, 2050 mSDsCounter, 0 mSdLazyCounter, 4983 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 2101 SdHoareTripleChecker+Invalid, 5014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 4983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:55:51,759 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 2101 Invalid, 5014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 4983 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-12-02 10:55:51,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5404 states. [2024-12-02 10:55:51,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5404 to 4425. [2024-12-02 10:55:51,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4425 states, 4423 states have (on average 1.077775265656794) internal successors, (4767), 4424 states have internal predecessors, (4767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:55:51,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4425 states to 4425 states and 4767 transitions. [2024-12-02 10:55:51,786 INFO L78 Accepts]: Start accepts. Automaton has 4425 states and 4767 transitions. Word has length 110 [2024-12-02 10:55:51,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:55:51,787 INFO L471 AbstractCegarLoop]: Abstraction has 4425 states and 4767 transitions. [2024-12-02 10:55:51,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.4761904761904763) internal successors, (219), 63 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:55:51,787 INFO L276 IsEmpty]: Start isEmpty. Operand 4425 states and 4767 transitions. [2024-12-02 10:55:51,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-12-02 10:55:51,789 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:55:51,789 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:55:51,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-12-02 10:55:51,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:55:51,989 INFO L396 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:55:51,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:55:51,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1584674956, now seen corresponding path program 17 times [2024-12-02 10:55:51,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:55:51,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614494990] [2024-12-02 10:55:51,990 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 10:55:51,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:55:52,016 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-12-02 10:55:52,016 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:55:53,107 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 231 proven. 271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:55:53,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:55:53,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614494990] [2024-12-02 10:55:53,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614494990] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:55:53,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499190309] [2024-12-02 10:55:53,107 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 10:55:53,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:55:53,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:55:53,109 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:55:53,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-12-02 10:55:53,500 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-12-02 10:55:53,500 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:55:53,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 106 conjuncts are in the unsatisfiable core [2024-12-02 10:55:53,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:55:53,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 10:55:53,559 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 [2024-12-02 10:55:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 231 proven. 271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:55:56,019 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:55:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 277 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:55:58,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499190309] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:55:58,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:55:58,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 97 [2024-12-02 10:55:58,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730471224] [2024-12-02 10:55:58,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:55:58,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2024-12-02 10:55:58,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:55:58,458 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2024-12-02 10:55:58,458 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=8681, Unknown=0, NotChecked=0, Total=9506 [2024-12-02 10:55:58,458 INFO L87 Difference]: Start difference. First operand 4425 states and 4767 transitions. Second operand has 98 states, 97 states have (on average 3.381443298969072) internal successors, (328), 98 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:56:01,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:56:01,607 INFO L93 Difference]: Finished difference Result 4880 states and 5220 transitions. [2024-12-02 10:56:01,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-12-02 10:56:01,608 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 97 states have (on average 3.381443298969072) internal successors, (328), 98 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2024-12-02 10:56:01,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:56:01,610 INFO L225 Difference]: With dead ends: 4880 [2024-12-02 10:56:01,610 INFO L226 Difference]: Without dead ends: 4676 [2024-12-02 10:56:01,611 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4106 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1354, Invalid=13408, Unknown=0, NotChecked=0, Total=14762 [2024-12-02 10:56:01,611 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 60 mSDsluCounter, 2009 mSDsCounter, 0 mSdLazyCounter, 4474 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 2064 SdHoareTripleChecker+Invalid, 4508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 4474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:56:01,611 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 2064 Invalid, 4508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 4474 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-12-02 10:56:01,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4676 states. [2024-12-02 10:56:01,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4676 to 4235. [2024-12-02 10:56:01,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4235 states, 4233 states have (on average 1.077722655327191) internal successors, (4562), 4234 states have internal predecessors, (4562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:56:01,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4235 states to 4235 states and 4562 transitions. [2024-12-02 10:56:01,661 INFO L78 Accepts]: Start accepts. Automaton has 4235 states and 4562 transitions. Word has length 110 [2024-12-02 10:56:01,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:56:01,661 INFO L471 AbstractCegarLoop]: Abstraction has 4235 states and 4562 transitions. [2024-12-02 10:56:01,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 97 states have (on average 3.381443298969072) internal successors, (328), 98 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:56:01,662 INFO L276 IsEmpty]: Start isEmpty. Operand 4235 states and 4562 transitions. [2024-12-02 10:56:01,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-12-02 10:56:01,665 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:56:01,665 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:56:01,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-12-02 10:56:01,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2024-12-02 10:56:01,865 INFO L396 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:56:01,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:56:01,866 INFO L85 PathProgramCache]: Analyzing trace with hash 538054557, now seen corresponding path program 18 times [2024-12-02 10:56:01,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:56:01,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677522427] [2024-12-02 10:56:01,866 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 10:56:01,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:56:01,919 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-12-02 10:56:01,919 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:56:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 92 proven. 262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:56:03,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:56:03,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677522427] [2024-12-02 10:56:03,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677522427] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:56:03,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623834301] [2024-12-02 10:56:03,161 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 10:56:03,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:03,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:56:03,163 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:56:03,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-12-02 10:56:05,496 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-12-02 10:56:05,496 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:56:05,505 INFO L256 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 200 conjuncts are in the unsatisfiable core [2024-12-02 10:56:05,509 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:56:05,542 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 10 treesize of output 8 [2024-12-02 10:56:05,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-12-02 10:56:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:56:09,600 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:56:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:56:12,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623834301] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:56:12,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:56:12,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 104 [2024-12-02 10:56:12,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770899995] [2024-12-02 10:56:12,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:56:12,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2024-12-02 10:56:12,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:56:12,637 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2024-12-02 10:56:12,637 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1054, Invalid=9866, Unknown=0, NotChecked=0, Total=10920 [2024-12-02 10:56:12,638 INFO L87 Difference]: Start difference. First operand 4235 states and 4562 transitions. Second operand has 105 states, 104 states have (on average 3.1826923076923075) internal successors, (331), 105 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:56:21,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:56:21,245 INFO L93 Difference]: Finished difference Result 5205 states and 5535 transitions. [2024-12-02 10:56:21,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2024-12-02 10:56:21,246 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 104 states have (on average 3.1826923076923075) internal successors, (331), 105 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2024-12-02 10:56:21,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:56:21,248 INFO L225 Difference]: With dead ends: 5205 [2024-12-02 10:56:21,248 INFO L226 Difference]: Without dead ends: 4888 [2024-12-02 10:56:21,249 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10086 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=2973, Invalid=28889, Unknown=0, NotChecked=0, Total=31862 [2024-12-02 10:56:21,249 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 429 mSDsluCounter, 2975 mSDsCounter, 0 mSdLazyCounter, 7046 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 3052 SdHoareTripleChecker+Invalid, 7170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 7046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:56:21,249 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 3052 Invalid, 7170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 7046 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-12-02 10:56:21,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4888 states. [2024-12-02 10:56:21,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4888 to 4197. [2024-12-02 10:56:21,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4197 states, 4195 states have (on average 1.0731823599523242) internal successors, (4502), 4196 states have internal predecessors, (4502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:56:21,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4197 states to 4197 states and 4502 transitions. [2024-12-02 10:56:21,273 INFO L78 Accepts]: Start accepts. Automaton has 4197 states and 4502 transitions. Word has length 111 [2024-12-02 10:56:21,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:56:21,273 INFO L471 AbstractCegarLoop]: Abstraction has 4197 states and 4502 transitions. [2024-12-02 10:56:21,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 104 states have (on average 3.1826923076923075) internal successors, (331), 105 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:56:21,273 INFO L276 IsEmpty]: Start isEmpty. Operand 4197 states and 4502 transitions. [2024-12-02 10:56:21,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-12-02 10:56:21,275 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:56:21,275 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:56:21,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-12-02 10:56:21,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2024-12-02 10:56:21,476 INFO L396 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:56:21,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:56:21,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1728629684, now seen corresponding path program 19 times [2024-12-02 10:56:21,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:56:21,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688309341] [2024-12-02 10:56:21,476 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 10:56:21,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:56:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 97 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:56:22,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:56:22,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688309341] [2024-12-02 10:56:22,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688309341] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:56:22,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945837457] [2024-12-02 10:56:22,745 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 10:56:22,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:22,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:56:22,747 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:56:22,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-12-02 10:56:22,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:23,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 131 conjuncts are in the unsatisfiable core [2024-12-02 10:56:23,005 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:56:23,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 10:56:25,649 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 135 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:56:25,649 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:56:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 181 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:56:28,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945837457] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:56:28,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:56:28,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 34] total 98 [2024-12-02 10:56:28,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531484633] [2024-12-02 10:56:28,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:56:28,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2024-12-02 10:56:28,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:56:28,089 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2024-12-02 10:56:28,089 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=887, Invalid=8815, Unknown=0, NotChecked=0, Total=9702 [2024-12-02 10:56:28,089 INFO L87 Difference]: Start difference. First operand 4197 states and 4502 transitions. Second operand has 99 states, 98 states have (on average 3.438775510204082) internal successors, (337), 99 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:56:33,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:56:33,565 INFO L93 Difference]: Finished difference Result 5273 states and 5576 transitions. [2024-12-02 10:56:33,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2024-12-02 10:56:33,566 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 98 states have (on average 3.438775510204082) internal successors, (337), 99 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2024-12-02 10:56:33,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:56:33,568 INFO L225 Difference]: With dead ends: 5273 [2024-12-02 10:56:33,568 INFO L226 Difference]: Without dead ends: 5024 [2024-12-02 10:56:33,569 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6866 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1960, Invalid=22220, Unknown=0, NotChecked=0, Total=24180 [2024-12-02 10:56:33,569 INFO L435 NwaCegarLoop]: 98 mSDtfsCounter, 207 mSDsluCounter, 2773 mSDsCounter, 0 mSdLazyCounter, 5957 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 2871 SdHoareTripleChecker+Invalid, 6023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 5957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-12-02 10:56:33,569 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 2871 Invalid, 6023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 5957 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-12-02 10:56:33,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5024 states. [2024-12-02 10:56:33,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5024 to 3877. [2024-12-02 10:56:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3877 states, 3875 states have (on average 1.0683870967741935) internal successors, (4140), 3876 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:56:33,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3877 states to 3877 states and 4140 transitions. [2024-12-02 10:56:33,602 INFO L78 Accepts]: Start accepts. Automaton has 3877 states and 4140 transitions. Word has length 113 [2024-12-02 10:56:33,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:56:33,602 INFO L471 AbstractCegarLoop]: Abstraction has 3877 states and 4140 transitions. [2024-12-02 10:56:33,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 98 states have (on average 3.438775510204082) internal successors, (337), 99 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:56:33,602 INFO L276 IsEmpty]: Start isEmpty. Operand 3877 states and 4140 transitions. [2024-12-02 10:56:33,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-12-02 10:56:33,605 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:56:33,605 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:56:33,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2024-12-02 10:56:33,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2024-12-02 10:56:33,805 INFO L396 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:56:33,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:56:33,806 INFO L85 PathProgramCache]: Analyzing trace with hash 116401041, now seen corresponding path program 20 times [2024-12-02 10:56:33,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:56:33,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782137581] [2024-12-02 10:56:33,806 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:56:33,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:56:33,832 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:56:33,832 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:56:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 153 proven. 333 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:56:34,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:56:34,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782137581] [2024-12-02 10:56:34,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782137581] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:56:34,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944718900] [2024-12-02 10:56:34,880 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:56:34,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:34,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:56:34,882 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:56:34,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-12-02 10:56:35,159 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:56:35,159 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:56:35,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 197 conjuncts are in the unsatisfiable core [2024-12-02 10:56:35,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:56:35,207 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 [2024-12-02 10:56:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 0 proven. 487 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:56:37,916 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:56:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 0 proven. 487 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:56:41,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944718900] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:56:41,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:56:41,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 34, 35] total 98 [2024-12-02 10:56:41,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406343778] [2024-12-02 10:56:41,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:56:41,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2024-12-02 10:56:41,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:56:41,367 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2024-12-02 10:56:41,367 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=809, Invalid=8893, Unknown=0, NotChecked=0, Total=9702 [2024-12-02 10:56:41,368 INFO L87 Difference]: Start difference. First operand 3877 states and 4140 transitions. Second operand has 99 states, 98 states have (on average 3.438775510204082) internal successors, (337), 99 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:56:48,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:56:48,400 INFO L93 Difference]: Finished difference Result 4740 states and 5017 transitions. [2024-12-02 10:56:48,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2024-12-02 10:56:48,401 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 98 states have (on average 3.438775510204082) internal successors, (337), 99 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2024-12-02 10:56:48,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:56:48,403 INFO L225 Difference]: With dead ends: 4740 [2024-12-02 10:56:48,403 INFO L226 Difference]: Without dead ends: 4625 [2024-12-02 10:56:48,404 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5848 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1768, Invalid=22412, Unknown=0, NotChecked=0, Total=24180 [2024-12-02 10:56:48,405 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 280 mSDsluCounter, 2679 mSDsCounter, 0 mSdLazyCounter, 6513 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 2746 SdHoareTripleChecker+Invalid, 6582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 6513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-12-02 10:56:48,405 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 2746 Invalid, 6582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 6513 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-12-02 10:56:48,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4625 states. [2024-12-02 10:56:48,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4625 to 3880. [2024-12-02 10:56:48,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3880 states, 3878 states have (on average 1.068592057761733) internal successors, (4144), 3879 states have internal predecessors, (4144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:56:48,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3880 states to 3880 states and 4144 transitions. [2024-12-02 10:56:48,448 INFO L78 Accepts]: Start accepts. Automaton has 3880 states and 4144 transitions. Word has length 113 [2024-12-02 10:56:48,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:56:48,449 INFO L471 AbstractCegarLoop]: Abstraction has 3880 states and 4144 transitions. [2024-12-02 10:56:48,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 98 states have (on average 3.438775510204082) internal successors, (337), 99 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:56:48,449 INFO L276 IsEmpty]: Start isEmpty. Operand 3880 states and 4144 transitions. [2024-12-02 10:56:48,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-12-02 10:56:48,452 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:56:48,452 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:56:48,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2024-12-02 10:56:48,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:48,652 INFO L396 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:56:48,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:56:48,653 INFO L85 PathProgramCache]: Analyzing trace with hash -909517352, now seen corresponding path program 16 times [2024-12-02 10:56:48,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:56:48,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487212515] [2024-12-02 10:56:48,653 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:56:48,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:56:48,685 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:56:48,685 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:56:49,897 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 276 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:56:49,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:56:49,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487212515] [2024-12-02 10:56:49,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487212515] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:56:49,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764558456] [2024-12-02 10:56:49,897 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:56:49,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:49,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:56:49,899 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:56:49,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-12-02 10:56:50,145 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:56:50,145 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:56:50,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-12-02 10:56:50,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:56:50,693 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 [2024-12-02 10:56:51,486 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 29 proven. 679 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:56:51,486 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:56:51,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 10:56:51,559 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 [2024-12-02 10:56:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 29 proven. 679 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:56:51,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764558456] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:56:51,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:56:51,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 72 [2024-12-02 10:56:51,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829793180] [2024-12-02 10:56:51,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:56:51,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-12-02 10:56:51,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:56:51,759 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-12-02 10:56:51,760 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=4773, Unknown=0, NotChecked=0, Total=5112 [2024-12-02 10:56:51,760 INFO L87 Difference]: Start difference. First operand 3880 states and 4144 transitions. Second operand has 72 states, 72 states have (on average 3.111111111111111) internal successors, (224), 72 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:56:55,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:56:55,071 INFO L93 Difference]: Finished difference Result 4876 states and 5206 transitions. [2024-12-02 10:56:55,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-12-02 10:56:55,072 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.111111111111111) internal successors, (224), 72 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2024-12-02 10:56:55,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:56:55,074 INFO L225 Difference]: With dead ends: 4876 [2024-12-02 10:56:55,074 INFO L226 Difference]: Without dead ends: 4828 [2024-12-02 10:56:55,074 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2435 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=604, Invalid=10526, Unknown=0, NotChecked=0, Total=11130 [2024-12-02 10:56:55,074 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 67 mSDsluCounter, 2492 mSDsCounter, 0 mSdLazyCounter, 5443 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2556 SdHoareTripleChecker+Invalid, 5466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 5443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-12-02 10:56:55,075 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 2556 Invalid, 5466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 5443 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-12-02 10:56:55,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2024-12-02 10:56:55,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 4547. [2024-12-02 10:56:55,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4547 states, 4545 states have (on average 1.0704070407040704) internal successors, (4865), 4546 states have internal predecessors, (4865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:56:55,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4547 states to 4547 states and 4865 transitions. [2024-12-02 10:56:55,099 INFO L78 Accepts]: Start accepts. Automaton has 4547 states and 4865 transitions. Word has length 115 [2024-12-02 10:56:55,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:56:55,100 INFO L471 AbstractCegarLoop]: Abstraction has 4547 states and 4865 transitions. [2024-12-02 10:56:55,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.111111111111111) internal successors, (224), 72 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:56:55,100 INFO L276 IsEmpty]: Start isEmpty. Operand 4547 states and 4865 transitions. [2024-12-02 10:56:55,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-12-02 10:56:55,101 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:56:55,101 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:56:55,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2024-12-02 10:56:55,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:55,302 INFO L396 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:56:55,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:56:55,302 INFO L85 PathProgramCache]: Analyzing trace with hash 368031592, now seen corresponding path program 21 times [2024-12-02 10:56:55,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:56:55,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652196306] [2024-12-02 10:56:55,302 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:56:55,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:56:55,335 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-12-02 10:56:55,335 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:56:56,694 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 73 proven. 239 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:56:56,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:56:56,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652196306] [2024-12-02 10:56:56,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652196306] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:56:56,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287939060] [2024-12-02 10:56:56,695 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:56:56,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:56,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:56:56,696 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:56:56,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-12-02 10:56:58,500 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-12-02 10:56:58,500 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:56:58,507 INFO L256 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-12-02 10:56:58,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:56:58,562 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 [2024-12-02 10:57:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 45 proven. 267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:00,458 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:57:02,596 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 157 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:02,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287939060] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:57:02,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:57:02,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 33, 33] total 102 [2024-12-02 10:57:02,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088977538] [2024-12-02 10:57:02,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:57:02,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2024-12-02 10:57:02,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:57:02,597 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2024-12-02 10:57:02,597 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1041, Invalid=9465, Unknown=0, NotChecked=0, Total=10506 [2024-12-02 10:57:02,597 INFO L87 Difference]: Start difference. First operand 4547 states and 4865 transitions. Second operand has 103 states, 102 states have (on average 3.3627450980392157) internal successors, (343), 103 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:07,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:57:07,390 INFO L93 Difference]: Finished difference Result 5649 states and 5991 transitions. [2024-12-02 10:57:07,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-12-02 10:57:07,390 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 102 states have (on average 3.3627450980392157) internal successors, (343), 103 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2024-12-02 10:57:07,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:57:07,393 INFO L225 Difference]: With dead ends: 5649 [2024-12-02 10:57:07,393 INFO L226 Difference]: Without dead ends: 5397 [2024-12-02 10:57:07,394 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10790 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=3631, Invalid=29675, Unknown=0, NotChecked=0, Total=33306 [2024-12-02 10:57:07,394 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 361 mSDsluCounter, 1550 mSDsCounter, 0 mSdLazyCounter, 4036 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 1611 SdHoareTripleChecker+Invalid, 4157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 4036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-12-02 10:57:07,394 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 1611 Invalid, 4157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 4036 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-12-02 10:57:07,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5397 states. [2024-12-02 10:57:07,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5397 to 4573. [2024-12-02 10:57:07,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4573 states, 4571 states have (on average 1.0695690220958214) internal successors, (4889), 4572 states have internal predecessors, (4889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:07,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4573 states to 4573 states and 4889 transitions. [2024-12-02 10:57:07,420 INFO L78 Accepts]: Start accepts. Automaton has 4573 states and 4889 transitions. Word has length 115 [2024-12-02 10:57:07,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:57:07,420 INFO L471 AbstractCegarLoop]: Abstraction has 4573 states and 4889 transitions. [2024-12-02 10:57:07,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 102 states have (on average 3.3627450980392157) internal successors, (343), 103 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:07,420 INFO L276 IsEmpty]: Start isEmpty. Operand 4573 states and 4889 transitions. [2024-12-02 10:57:07,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-12-02 10:57:07,422 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:57:07,422 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:57:07,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2024-12-02 10:57:07,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:07,622 INFO L396 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:57:07,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:07,623 INFO L85 PathProgramCache]: Analyzing trace with hash 602341148, now seen corresponding path program 22 times [2024-12-02 10:57:07,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:57:07,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884450503] [2024-12-02 10:57:07,623 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:57:07,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:57:07,725 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:57:07,725 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:57:09,273 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 106 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:09,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:57:09,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884450503] [2024-12-02 10:57:09,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884450503] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:57:09,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248389854] [2024-12-02 10:57:09,274 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:57:09,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:09,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:09,276 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:09,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-12-02 10:57:10,743 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:57:10,743 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:57:10,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 179 conjuncts are in the unsatisfiable core [2024-12-02 10:57:10,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:10,799 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 [2024-12-02 10:57:13,914 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:13,914 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:57:17,205 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:17,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248389854] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:57:17,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:57:17,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 37, 37] total 107 [2024-12-02 10:57:17,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990782732] [2024-12-02 10:57:17,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:57:17,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2024-12-02 10:57:17,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:57:17,207 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2024-12-02 10:57:17,207 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=771, Invalid=10785, Unknown=0, NotChecked=0, Total=11556 [2024-12-02 10:57:17,207 INFO L87 Difference]: Start difference. First operand 4573 states and 4889 transitions. Second operand has 108 states, 107 states have (on average 3.2616822429906542) internal successors, (349), 108 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:25,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:57:25,494 INFO L93 Difference]: Finished difference Result 5290 states and 5616 transitions. [2024-12-02 10:57:25,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2024-12-02 10:57:25,495 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 107 states have (on average 3.2616822429906542) internal successors, (349), 108 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2024-12-02 10:57:25,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:57:25,497 INFO L225 Difference]: With dead ends: 5290 [2024-12-02 10:57:25,497 INFO L226 Difference]: Without dead ends: 5142 [2024-12-02 10:57:25,498 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9810 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=2530, Invalid=29690, Unknown=0, NotChecked=0, Total=32220 [2024-12-02 10:57:25,499 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 438 mSDsluCounter, 3930 mSDsCounter, 0 mSdLazyCounter, 9334 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 4009 SdHoareTripleChecker+Invalid, 9447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 9334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-12-02 10:57:25,499 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 4009 Invalid, 9447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 9334 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-12-02 10:57:25,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5142 states. [2024-12-02 10:57:25,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5142 to 4582. [2024-12-02 10:57:25,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4582 states, 4580 states have (on average 1.0692139737991266) internal successors, (4897), 4581 states have internal predecessors, (4897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:25,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4582 states to 4582 states and 4897 transitions. [2024-12-02 10:57:25,528 INFO L78 Accepts]: Start accepts. Automaton has 4582 states and 4897 transitions. Word has length 117 [2024-12-02 10:57:25,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:57:25,528 INFO L471 AbstractCegarLoop]: Abstraction has 4582 states and 4897 transitions. [2024-12-02 10:57:25,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 107 states have (on average 3.2616822429906542) internal successors, (349), 108 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:25,529 INFO L276 IsEmpty]: Start isEmpty. Operand 4582 states and 4897 transitions. [2024-12-02 10:57:25,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-12-02 10:57:25,531 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:57:25,531 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:57:25,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2024-12-02 10:57:25,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2024-12-02 10:57:25,731 INFO L396 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:57:25,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:25,731 INFO L85 PathProgramCache]: Analyzing trace with hash -2099092065, now seen corresponding path program 14 times [2024-12-02 10:57:25,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:57:25,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260766357] [2024-12-02 10:57:25,732 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:57:25,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:57:25,768 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:57:25,768 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:57:26,979 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 190 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:26,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:57:26,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260766357] [2024-12-02 10:57:26,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260766357] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:57:26,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046464023] [2024-12-02 10:57:26,979 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:57:26,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:26,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:26,981 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:26,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-12-02 10:57:27,287 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:57:27,287 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:57:27,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 144 conjuncts are in the unsatisfiable core [2024-12-02 10:57:27,293 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:27,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 10:57:28,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-12-02 10:57:28,572 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 39 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:28,572 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:57:28,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 10:57:28,682 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 [2024-12-02 10:57:28,844 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 39 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:28,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046464023] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:57:28,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:57:28,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 69 [2024-12-02 10:57:28,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45987832] [2024-12-02 10:57:28,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:57:28,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-12-02 10:57:28,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:57:28,846 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-12-02 10:57:28,846 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=4489, Unknown=0, NotChecked=0, Total=4692 [2024-12-02 10:57:28,846 INFO L87 Difference]: Start difference. First operand 4582 states and 4897 transitions. Second operand has 69 states, 69 states have (on average 3.5072463768115942) internal successors, (242), 69 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:42,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:57:42,021 INFO L93 Difference]: Finished difference Result 5990 states and 6377 transitions. [2024-12-02 10:57:42,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2024-12-02 10:57:42,021 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.5072463768115942) internal successors, (242), 69 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2024-12-02 10:57:42,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:57:42,024 INFO L225 Difference]: With dead ends: 5990 [2024-12-02 10:57:42,024 INFO L226 Difference]: Without dead ends: 5662 [2024-12-02 10:57:42,026 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15170 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1048, Invalid=50708, Unknown=0, NotChecked=0, Total=51756 [2024-12-02 10:57:42,026 INFO L435 NwaCegarLoop]: 156 mSDtfsCounter, 179 mSDsluCounter, 7405 mSDsCounter, 0 mSdLazyCounter, 21943 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 7561 SdHoareTripleChecker+Invalid, 21982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 21943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2024-12-02 10:57:42,026 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 7561 Invalid, 21982 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [39 Valid, 21943 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2024-12-02 10:57:42,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5662 states. [2024-12-02 10:57:42,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5662 to 5098. [2024-12-02 10:57:42,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5098 states, 5096 states have (on average 1.071624803767661) internal successors, (5461), 5097 states have internal predecessors, (5461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:42,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5098 states to 5098 states and 5461 transitions. [2024-12-02 10:57:42,058 INFO L78 Accepts]: Start accepts. Automaton has 5098 states and 5461 transitions. Word has length 118 [2024-12-02 10:57:42,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:57:42,058 INFO L471 AbstractCegarLoop]: Abstraction has 5098 states and 5461 transitions. [2024-12-02 10:57:42,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.5072463768115942) internal successors, (242), 69 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:42,058 INFO L276 IsEmpty]: Start isEmpty. Operand 5098 states and 5461 transitions. [2024-12-02 10:57:42,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-12-02 10:57:42,061 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:57:42,061 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:57:42,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2024-12-02 10:57:42,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2024-12-02 10:57:42,261 INFO L396 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:57:42,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:42,261 INFO L85 PathProgramCache]: Analyzing trace with hash -158603853, now seen corresponding path program 23 times [2024-12-02 10:57:42,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:57:42,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549539947] [2024-12-02 10:57:42,261 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 10:57:42,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:57:42,295 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-12-02 10:57:42,295 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:57:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 196 proven. 258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:43,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:57:43,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549539947] [2024-12-02 10:57:43,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549539947] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:57:43,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195731769] [2024-12-02 10:57:43,653 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 10:57:43,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:43,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:43,654 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:43,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-12-02 10:57:44,459 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-12-02 10:57:44,459 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:57:44,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 127 conjuncts are in the unsatisfiable core [2024-12-02 10:57:44,466 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:44,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 10:57:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 196 proven. 258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:47,445 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:57:50,452 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 246 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:50,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195731769] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:57:50,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:57:50,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 104 [2024-12-02 10:57:50,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934263960] [2024-12-02 10:57:50,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:57:50,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2024-12-02 10:57:50,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:57:50,453 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2024-12-02 10:57:50,453 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=9867, Unknown=0, NotChecked=0, Total=10920 [2024-12-02 10:57:50,454 INFO L87 Difference]: Start difference. First operand 5098 states and 5461 transitions. Second operand has 105 states, 104 states have (on average 3.4134615384615383) internal successors, (355), 105 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:54,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:57:54,580 INFO L93 Difference]: Finished difference Result 5453 states and 5814 transitions. [2024-12-02 10:57:54,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-12-02 10:57:54,580 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 104 states have (on average 3.4134615384615383) internal successors, (355), 105 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2024-12-02 10:57:54,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:57:54,582 INFO L225 Difference]: With dead ends: 5453 [2024-12-02 10:57:54,582 INFO L226 Difference]: Without dead ends: 5299 [2024-12-02 10:57:54,583 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5935 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1825, Invalid=18197, Unknown=0, NotChecked=0, Total=20022 [2024-12-02 10:57:54,583 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 49 mSDsluCounter, 2259 mSDsCounter, 0 mSdLazyCounter, 5341 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 2329 SdHoareTripleChecker+Invalid, 5352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 5341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-12-02 10:57:54,583 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 2329 Invalid, 5352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 5341 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-12-02 10:57:54,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5299 states. [2024-12-02 10:57:54,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5299 to 5017. [2024-12-02 10:57:54,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5017 states, 5015 states have (on average 1.0707876370887337) internal successors, (5370), 5016 states have internal predecessors, (5370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:54,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5017 states to 5017 states and 5370 transitions. [2024-12-02 10:57:54,611 INFO L78 Accepts]: Start accepts. Automaton has 5017 states and 5370 transitions. Word has length 119 [2024-12-02 10:57:54,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:57:54,611 INFO L471 AbstractCegarLoop]: Abstraction has 5017 states and 5370 transitions. [2024-12-02 10:57:54,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 104 states have (on average 3.4134615384615383) internal successors, (355), 105 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:54,611 INFO L276 IsEmpty]: Start isEmpty. Operand 5017 states and 5370 transitions. [2024-12-02 10:57:54,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-12-02 10:57:54,613 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:57:54,613 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:57:54,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2024-12-02 10:57:54,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:54,814 INFO L396 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:57:54,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:54,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1309237321, now seen corresponding path program 17 times [2024-12-02 10:57:54,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:57:54,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968972458] [2024-12-02 10:57:54,814 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 10:57:54,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:57:54,845 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-12-02 10:57:54,845 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:57:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 338 proven. 473 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:56,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:57:56,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968972458] [2024-12-02 10:57:56,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968972458] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:57:56,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169697692] [2024-12-02 10:57:56,320 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 10:57:56,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:56,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:56,322 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:56,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-12-02 10:57:56,804 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-12-02 10:57:56,804 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:57:56,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 108 conjuncts are in the unsatisfiable core [2024-12-02 10:57:56,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:57,468 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 [2024-12-02 10:57:58,409 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 31 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:58,409 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:57:58,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 10:57:58,469 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 [2024-12-02 10:57:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 31 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:58,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169697692] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:57:58,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:57:58,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 38, 38] total 80 [2024-12-02 10:57:58,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481989899] [2024-12-02 10:57:58,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:57:58,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-12-02 10:57:58,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:57:58,661 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-12-02 10:57:58,661 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=6046, Unknown=0, NotChecked=0, Total=6320 [2024-12-02 10:57:58,661 INFO L87 Difference]: Start difference. First operand 5017 states and 5370 transitions. Second operand has 80 states, 80 states have (on average 3.1) internal successors, (248), 80 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:58:05,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:58:05,809 INFO L93 Difference]: Finished difference Result 6149 states and 6560 transitions. [2024-12-02 10:58:05,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2024-12-02 10:58:05,809 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.1) internal successors, (248), 80 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2024-12-02 10:58:05,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:58:05,811 INFO L225 Difference]: With dead ends: 6149 [2024-12-02 10:58:05,812 INFO L226 Difference]: Without dead ends: 6047 [2024-12-02 10:58:05,813 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5876 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1210, Invalid=26180, Unknown=0, NotChecked=0, Total=27390 [2024-12-02 10:58:05,813 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 166 mSDsluCounter, 3605 mSDsCounter, 0 mSdLazyCounter, 7981 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 3671 SdHoareTripleChecker+Invalid, 8030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 7981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:58:05,813 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 3671 Invalid, 8030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 7981 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-12-02 10:58:05,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6047 states. [2024-12-02 10:58:05,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6047 to 5803. [2024-12-02 10:58:05,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5803 states, 5801 states have (on average 1.0711946216169626) internal successors, (6214), 5802 states have internal predecessors, (6214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:58:05,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5803 states to 5803 states and 6214 transitions. [2024-12-02 10:58:05,861 INFO L78 Accepts]: Start accepts. Automaton has 5803 states and 6214 transitions. Word has length 122 [2024-12-02 10:58:05,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:58:05,861 INFO L471 AbstractCegarLoop]: Abstraction has 5803 states and 6214 transitions. [2024-12-02 10:58:05,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.1) internal successors, (248), 80 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:58:05,862 INFO L276 IsEmpty]: Start isEmpty. Operand 5803 states and 6214 transitions. [2024-12-02 10:58:05,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-12-02 10:58:05,864 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:58:05,864 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:58:05,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2024-12-02 10:58:06,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:58:06,064 INFO L396 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:58:06,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:58:06,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1825135770, now seen corresponding path program 24 times [2024-12-02 10:58:06,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:58:06,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952476754] [2024-12-02 10:58:06,065 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 10:58:06,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:58:06,119 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2024-12-02 10:58:06,119 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:58:07,376 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 276 proven. 407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:58:07,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:58:07,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952476754] [2024-12-02 10:58:07,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952476754] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:58:07,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280806101] [2024-12-02 10:58:07,377 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 10:58:07,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:58:07,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:58:07,378 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:58:07,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-12-02 10:58:09,069 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2024-12-02 10:58:09,069 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:58:09,075 INFO L256 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-12-02 10:58:09,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:58:09,107 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 [2024-12-02 10:58:10,980 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 325 proven. 358 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:58:10,980 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:58:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 379 proven. 304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:58:13,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280806101] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:58:13,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:58:13,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 37, 37] total 111 [2024-12-02 10:58:13,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172446243] [2024-12-02 10:58:13,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:58:13,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2024-12-02 10:58:13,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:58:13,117 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2024-12-02 10:58:13,118 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1436, Invalid=10996, Unknown=0, NotChecked=0, Total=12432 [2024-12-02 10:58:13,118 INFO L87 Difference]: Start difference. First operand 5803 states and 6214 transitions. Second operand has 112 states, 111 states have (on average 3.3333333333333335) internal successors, (370), 112 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:58:16,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:58:16,374 INFO L93 Difference]: Finished difference Result 6455 states and 6877 transitions. [2024-12-02 10:58:16,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-12-02 10:58:16,374 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 111 states have (on average 3.3333333333333335) internal successors, (370), 112 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2024-12-02 10:58:16,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:58:16,377 INFO L225 Difference]: With dead ends: 6455 [2024-12-02 10:58:16,377 INFO L226 Difference]: Without dead ends: 6215 [2024-12-02 10:58:16,378 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10013 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=3282, Invalid=26130, Unknown=0, NotChecked=0, Total=29412 [2024-12-02 10:58:16,378 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 159 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 2597 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 2681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:58:16,378 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 1130 Invalid, 2681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2597 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-12-02 10:58:16,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6215 states. [2024-12-02 10:58:16,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6215 to 5461. [2024-12-02 10:58:16,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5461 states, 5459 states have (on average 1.070708921047811) internal successors, (5845), 5460 states have internal predecessors, (5845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:58:16,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5461 states to 5461 states and 5845 transitions. [2024-12-02 10:58:16,412 INFO L78 Accepts]: Start accepts. Automaton has 5461 states and 5845 transitions. Word has length 124 [2024-12-02 10:58:16,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:58:16,412 INFO L471 AbstractCegarLoop]: Abstraction has 5461 states and 5845 transitions. [2024-12-02 10:58:16,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 111 states have (on average 3.3333333333333335) internal successors, (370), 112 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:58:16,412 INFO L276 IsEmpty]: Start isEmpty. Operand 5461 states and 5845 transitions. [2024-12-02 10:58:16,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-12-02 10:58:16,415 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:58:16,415 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:58:16,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2024-12-02 10:58:16,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:58:16,615 INFO L396 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:58:16,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:58:16,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1535638080, now seen corresponding path program 15 times [2024-12-02 10:58:16,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:58:16,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500072448] [2024-12-02 10:58:16,616 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:58:16,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:58:16,667 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-12-02 10:58:16,667 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:58:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 231 proven. 500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:58:18,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:58:18,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500072448] [2024-12-02 10:58:18,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500072448] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:58:18,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355179723] [2024-12-02 10:58:18,388 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:58:18,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:58:18,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:58:18,389 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:58:18,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-12-02 10:58:21,366 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-12-02 10:58:21,366 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:58:21,374 INFO L256 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 150 conjuncts are in the unsatisfiable core [2024-12-02 10:58:21,376 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:58:21,895 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 [2024-12-02 10:58:22,698 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 42 proven. 689 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:58:22,698 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:58:22,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 10:58:22,763 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 [2024-12-02 10:58:22,932 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 42 proven. 689 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:58:22,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355179723] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:58:22,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:58:22,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 35, 35] total 82 [2024-12-02 10:58:22,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532139473] [2024-12-02 10:58:22,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:58:22,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-12-02 10:58:22,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:58:22,934 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-12-02 10:58:22,934 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=6218, Unknown=0, NotChecked=0, Total=6642 [2024-12-02 10:58:22,934 INFO L87 Difference]: Start difference. First operand 5461 states and 5845 transitions. Second operand has 82 states, 82 states have (on average 3.1219512195121952) internal successors, (256), 82 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:58:29,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:58:29,242 INFO L93 Difference]: Finished difference Result 6652 states and 7106 transitions. [2024-12-02 10:58:29,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2024-12-02 10:58:29,242 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.1219512195121952) internal successors, (256), 82 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2024-12-02 10:58:29,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:58:29,245 INFO L225 Difference]: With dead ends: 6652 [2024-12-02 10:58:29,245 INFO L226 Difference]: Without dead ends: 6470 [2024-12-02 10:58:29,246 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8193 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=2160, Invalid=31146, Unknown=0, NotChecked=0, Total=33306 [2024-12-02 10:58:29,246 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 127 mSDsluCounter, 2566 mSDsCounter, 0 mSdLazyCounter, 5487 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 2630 SdHoareTripleChecker+Invalid, 5541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 5487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-12-02 10:58:29,246 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 2630 Invalid, 5541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 5487 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-12-02 10:58:29,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6470 states. [2024-12-02 10:58:29,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6470 to 6043. [2024-12-02 10:58:29,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6043 states, 6041 states have (on average 1.0738288362853832) internal successors, (6487), 6042 states have internal predecessors, (6487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:58:29,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6043 states to 6043 states and 6487 transitions. [2024-12-02 10:58:29,281 INFO L78 Accepts]: Start accepts. Automaton has 6043 states and 6487 transitions. Word has length 126 [2024-12-02 10:58:29,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:58:29,281 INFO L471 AbstractCegarLoop]: Abstraction has 6043 states and 6487 transitions. [2024-12-02 10:58:29,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.1219512195121952) internal successors, (256), 82 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:58:29,281 INFO L276 IsEmpty]: Start isEmpty. Operand 6043 states and 6487 transitions. [2024-12-02 10:58:29,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-12-02 10:58:29,284 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:58:29,284 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:58:29,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2024-12-02 10:58:29,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:58:29,484 INFO L396 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:58:29,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:58:29,485 INFO L85 PathProgramCache]: Analyzing trace with hash 2020672796, now seen corresponding path program 1 times [2024-12-02 10:58:29,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:58:29,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707478813] [2024-12-02 10:58:29,485 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:58:29,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:58:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:58:30,449 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 378 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:58:30,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:58:30,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707478813] [2024-12-02 10:58:30,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707478813] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:58:30,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506939818] [2024-12-02 10:58:30,450 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:58:30,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:58:30,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:58:30,451 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:58:30,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-12-02 10:58:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:58:30,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-12-02 10:58:30,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:58:30,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 10:58:31,324 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 435 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:58:31,325 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:58:32,928 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 435 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:58:32,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506939818] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:58:32,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:58:32,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 93 [2024-12-02 10:58:32,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860009468] [2024-12-02 10:58:32,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:58:32,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2024-12-02 10:58:32,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:58:32,929 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2024-12-02 10:58:32,930 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1140, Invalid=7602, Unknown=0, NotChecked=0, Total=8742 [2024-12-02 10:58:32,930 INFO L87 Difference]: Start difference. First operand 6043 states and 6487 transitions. Second operand has 94 states, 93 states have (on average 3.4408602150537635) internal successors, (320), 94 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:58:34,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:58:34,357 INFO L93 Difference]: Finished difference Result 6448 states and 6906 transitions. [2024-12-02 10:58:34,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-12-02 10:58:34,357 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 3.4408602150537635) internal successors, (320), 94 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2024-12-02 10:58:34,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:58:34,360 INFO L225 Difference]: With dead ends: 6448 [2024-12-02 10:58:34,360 INFO L226 Difference]: Without dead ends: 6448 [2024-12-02 10:58:34,361 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3602 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1193, Invalid=7737, Unknown=0, NotChecked=0, Total=8930 [2024-12-02 10:58:34,361 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 66 mSDsluCounter, 1871 mSDsCounter, 0 mSdLazyCounter, 3705 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1941 SdHoareTripleChecker+Invalid, 3716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-12-02 10:58:34,361 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 1941 Invalid, 3716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3705 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-12-02 10:58:34,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6448 states. [2024-12-02 10:58:34,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6448 to 5973. [2024-12-02 10:58:34,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5973 states, 5971 states have (on average 1.0745268799196115) internal successors, (6416), 5972 states have internal predecessors, (6416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:58:34,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5973 states to 5973 states and 6416 transitions. [2024-12-02 10:58:34,396 INFO L78 Accepts]: Start accepts. Automaton has 5973 states and 6416 transitions. Word has length 126 [2024-12-02 10:58:34,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:58:34,397 INFO L471 AbstractCegarLoop]: Abstraction has 5973 states and 6416 transitions. [2024-12-02 10:58:34,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 3.4408602150537635) internal successors, (320), 94 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:58:34,397 INFO L276 IsEmpty]: Start isEmpty. Operand 5973 states and 6416 transitions. [2024-12-02 10:58:34,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-12-02 10:58:34,399 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:58:34,399 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:58:34,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2024-12-02 10:58:34,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:58:34,600 INFO L396 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:58:34,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:58:34,600 INFO L85 PathProgramCache]: Analyzing trace with hash -107579395, now seen corresponding path program 25 times [2024-12-02 10:58:34,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:58:34,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515289212] [2024-12-02 10:58:34,600 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 10:58:34,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:58:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:58:36,192 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 126 proven. 328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:58:36,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:58:36,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515289212] [2024-12-02 10:58:36,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515289212] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:58:36,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859218050] [2024-12-02 10:58:36,193 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 10:58:36,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:58:36,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:58:36,194 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:58:36,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-12-02 10:58:36,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:58:36,542 INFO L256 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 184 conjuncts are in the unsatisfiable core [2024-12-02 10:58:36,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:58:36,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 10:58:36,597 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 [2024-12-02 10:58:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 168 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:58:39,633 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:58:42,434 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 218 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:58:42,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859218050] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:58:42,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:58:42,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 36] total 104 [2024-12-02 10:58:42,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2755778] [2024-12-02 10:58:42,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:58:42,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2024-12-02 10:58:42,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:58:42,436 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2024-12-02 10:58:42,436 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1005, Invalid=9915, Unknown=0, NotChecked=0, Total=10920 [2024-12-02 10:58:42,436 INFO L87 Difference]: Start difference. First operand 5973 states and 6416 transitions. Second operand has 105 states, 104 states have (on average 3.6153846153846154) internal successors, (376), 105 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:58:47,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:58:47,721 INFO L93 Difference]: Finished difference Result 7300 states and 7763 transitions. [2024-12-02 10:58:47,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2024-12-02 10:58:47,721 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 104 states have (on average 3.6153846153846154) internal successors, (376), 105 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2024-12-02 10:58:47,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:58:47,724 INFO L225 Difference]: With dead ends: 7300 [2024-12-02 10:58:47,724 INFO L226 Difference]: Without dead ends: 7010 [2024-12-02 10:58:47,725 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7345 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=2031, Invalid=23091, Unknown=0, NotChecked=0, Total=25122 [2024-12-02 10:58:47,726 INFO L435 NwaCegarLoop]: 92 mSDtfsCounter, 250 mSDsluCounter, 2907 mSDsCounter, 0 mSdLazyCounter, 6371 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 2999 SdHoareTripleChecker+Invalid, 6450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 6371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-12-02 10:58:47,726 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 2999 Invalid, 6450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 6371 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-12-02 10:58:47,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7010 states. [2024-12-02 10:58:47,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7010 to 5918. [2024-12-02 10:58:47,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5918 states, 5916 states have (on average 1.0706558485463151) internal successors, (6334), 5917 states have internal predecessors, (6334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:58:47,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5918 states to 5918 states and 6334 transitions. [2024-12-02 10:58:47,763 INFO L78 Accepts]: Start accepts. Automaton has 5918 states and 6334 transitions. Word has length 126 [2024-12-02 10:58:47,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:58:47,763 INFO L471 AbstractCegarLoop]: Abstraction has 5918 states and 6334 transitions. [2024-12-02 10:58:47,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 104 states have (on average 3.6153846153846154) internal successors, (376), 105 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:58:47,763 INFO L276 IsEmpty]: Start isEmpty. Operand 5918 states and 6334 transitions. [2024-12-02 10:58:47,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-12-02 10:58:47,767 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:58:47,767 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:58:47,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2024-12-02 10:58:47,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:58:47,967 INFO L396 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:58:47,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:58:47,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1224653681, now seen corresponding path program 26 times [2024-12-02 10:58:47,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:58:47,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420942624] [2024-12-02 10:58:47,968 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:58:47,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:58:47,999 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:58:47,999 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:58:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 190 proven. 399 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:58:49,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:58:49,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420942624] [2024-12-02 10:58:49,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420942624] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:58:49,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651450212] [2024-12-02 10:58:49,535 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:58:49,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:58:49,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:58:49,536 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:58:49,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-12-02 10:58:49,852 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:58:49,852 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:58:49,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 217 conjuncts are in the unsatisfiable core [2024-12-02 10:58:49,859 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:58:49,904 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 [2024-12-02 10:58:49,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 10:58:53,243 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 0 proven. 589 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:58:53,243 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:58:56,778 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 0 proven. 589 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:58:56,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651450212] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:58:56,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:58:56,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39, 39] total 114 [2024-12-02 10:58:56,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996159230] [2024-12-02 10:58:56,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:58:56,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2024-12-02 10:58:56,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:58:56,780 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2024-12-02 10:58:56,780 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1144, Invalid=11966, Unknown=0, NotChecked=0, Total=13110 [2024-12-02 10:58:56,780 INFO L87 Difference]: Start difference. First operand 5918 states and 6334 transitions. Second operand has 115 states, 114 states have (on average 3.3508771929824563) internal successors, (382), 115 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:59:02,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:59:02,465 INFO L93 Difference]: Finished difference Result 6973 states and 7400 transitions. [2024-12-02 10:59:02,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2024-12-02 10:59:02,466 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 114 states have (on average 3.3508771929824563) internal successors, (382), 115 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2024-12-02 10:59:02,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:59:02,469 INFO L225 Difference]: With dead ends: 6973 [2024-12-02 10:59:02,469 INFO L226 Difference]: Without dead ends: 6713 [2024-12-02 10:59:02,470 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7691 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=2007, Invalid=23115, Unknown=0, NotChecked=0, Total=25122 [2024-12-02 10:59:02,470 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 409 mSDsluCounter, 3201 mSDsCounter, 0 mSdLazyCounter, 7772 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 3283 SdHoareTripleChecker+Invalid, 7864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 7772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-12-02 10:59:02,470 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 3283 Invalid, 7864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 7772 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-12-02 10:59:02,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6713 states. [2024-12-02 10:59:02,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6713 to 5920. [2024-12-02 10:59:02,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5920 states, 5918 states have (on average 1.070631970260223) internal successors, (6336), 5919 states have internal predecessors, (6336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:59:02,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5920 states to 5920 states and 6336 transitions. [2024-12-02 10:59:02,506 INFO L78 Accepts]: Start accepts. Automaton has 5920 states and 6336 transitions. Word has length 128 [2024-12-02 10:59:02,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:59:02,506 INFO L471 AbstractCegarLoop]: Abstraction has 5920 states and 6336 transitions. [2024-12-02 10:59:02,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 114 states have (on average 3.3508771929824563) internal successors, (382), 115 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:59:02,506 INFO L276 IsEmpty]: Start isEmpty. Operand 5920 states and 6336 transitions. [2024-12-02 10:59:02,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-12-02 10:59:02,508 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:59:02,509 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:59:02,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2024-12-02 10:59:02,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:59:02,709 INFO L396 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:59:02,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:59:02,709 INFO L85 PathProgramCache]: Analyzing trace with hash 36167498, now seen corresponding path program 18 times [2024-12-02 10:59:02,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:59:02,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297254601] [2024-12-02 10:59:02,709 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 10:59:02,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:59:02,749 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2024-12-02 10:59:02,749 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:59:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 378 proven. 543 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:59:04,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:59:04,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297254601] [2024-12-02 10:59:04,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297254601] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:59:04,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563193125] [2024-12-02 10:59:04,230 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 10:59:04,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:59:04,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:59:04,232 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:59:04,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-12-02 10:59:04,798 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2024-12-02 10:59:04,798 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:59:04,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 114 conjuncts are in the unsatisfiable core [2024-12-02 10:59:04,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:59:05,348 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 [2024-12-02 10:59:06,188 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 33 proven. 888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:59:06,188 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:59:06,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 10:59:06,252 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 [2024-12-02 10:59:06,421 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 33 proven. 888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:59:06,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563193125] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:59:06,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:59:06,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 40, 40] total 83 [2024-12-02 10:59:06,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117235722] [2024-12-02 10:59:06,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:59:06,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-12-02 10:59:06,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:59:06,423 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-12-02 10:59:06,423 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=6387, Unknown=0, NotChecked=0, Total=6806 [2024-12-02 10:59:06,423 INFO L87 Difference]: Start difference. First operand 5920 states and 6336 transitions. Second operand has 83 states, 83 states have (on average 3.1566265060240966) internal successors, (262), 83 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:59:11,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:59:11,267 INFO L93 Difference]: Finished difference Result 7393 states and 7906 transitions. [2024-12-02 10:59:11,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2024-12-02 10:59:11,268 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.1566265060240966) internal successors, (262), 83 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2024-12-02 10:59:11,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:59:11,271 INFO L225 Difference]: With dead ends: 7393 [2024-12-02 10:59:11,271 INFO L226 Difference]: Without dead ends: 7339 [2024-12-02 10:59:11,272 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5494 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1608, Invalid=21954, Unknown=0, NotChecked=0, Total=23562 [2024-12-02 10:59:11,272 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 288 mSDsluCounter, 2890 mSDsCounter, 0 mSdLazyCounter, 6356 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 2957 SdHoareTripleChecker+Invalid, 6432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 6356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:59:11,273 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 2957 Invalid, 6432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 6356 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-12-02 10:59:11,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7339 states. [2024-12-02 10:59:11,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7339 to 6781. [2024-12-02 10:59:11,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6781 states, 6779 states have (on average 1.0739047057088067) internal successors, (7280), 6780 states have internal predecessors, (7280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:59:11,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6781 states to 6781 states and 7280 transitions. [2024-12-02 10:59:11,318 INFO L78 Accepts]: Start accepts. Automaton has 6781 states and 7280 transitions. Word has length 129 [2024-12-02 10:59:11,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:59:11,318 INFO L471 AbstractCegarLoop]: Abstraction has 6781 states and 7280 transitions. [2024-12-02 10:59:11,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.1566265060240966) internal successors, (262), 83 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:59:11,318 INFO L276 IsEmpty]: Start isEmpty. Operand 6781 states and 7280 transitions. [2024-12-02 10:59:11,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-12-02 10:59:11,321 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:59:11,321 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:59:11,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2024-12-02 10:59:11,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2024-12-02 10:59:11,521 INFO L396 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:59:11,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:59:11,522 INFO L85 PathProgramCache]: Analyzing trace with hash 2069756954, now seen corresponding path program 27 times [2024-12-02 10:59:11,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:59:11,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825580593] [2024-12-02 10:59:11,522 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:59:11,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:59:11,563 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-12-02 10:59:11,563 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:59:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 119 proven. 304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:59:13,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:59:13,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825580593] [2024-12-02 10:59:13,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825580593] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:59:13,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304919740] [2024-12-02 10:59:13,059 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:59:13,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:59:13,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:59:13,060 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:59:13,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2024-12-02 10:59:16,150 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-12-02 10:59:16,150 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:59:16,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 178 conjuncts are in the unsatisfiable core [2024-12-02 10:59:16,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:59:16,204 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 [2024-12-02 10:59:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 0 proven. 423 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:59:19,459 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:59:22,519 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 0 proven. 423 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:59:22,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304919740] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:59:22,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:59:22,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 122 [2024-12-02 10:59:22,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971935064] [2024-12-02 10:59:22,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:59:22,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2024-12-02 10:59:22,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:59:22,520 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2024-12-02 10:59:22,521 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=13676, Unknown=0, NotChecked=0, Total=15006 [2024-12-02 10:59:22,521 INFO L87 Difference]: Start difference. First operand 6781 states and 7280 transitions. Second operand has 123 states, 122 states have (on average 3.1557377049180326) internal successors, (385), 123 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:59:31,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:59:31,352 INFO L93 Difference]: Finished difference Result 8098 states and 8613 transitions. [2024-12-02 10:59:31,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2024-12-02 10:59:31,353 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 122 states have (on average 3.1557377049180326) internal successors, (385), 123 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2024-12-02 10:59:31,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:59:31,356 INFO L225 Difference]: With dead ends: 8098 [2024-12-02 10:59:31,356 INFO L226 Difference]: Without dead ends: 7832 [2024-12-02 10:59:31,358 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12460 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=3059, Invalid=35553, Unknown=0, NotChecked=0, Total=38612 [2024-12-02 10:59:31,358 INFO L435 NwaCegarLoop]: 101 mSDtfsCounter, 731 mSDsluCounter, 4391 mSDsCounter, 0 mSdLazyCounter, 10332 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 4492 SdHoareTripleChecker+Invalid, 10428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 10332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-12-02 10:59:31,358 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [731 Valid, 4492 Invalid, 10428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 10332 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-12-02 10:59:31,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7832 states. [2024-12-02 10:59:31,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7832 to 6538. [2024-12-02 10:59:31,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6538 states, 6536 states have (on average 1.0735924112607098) internal successors, (7017), 6537 states have internal predecessors, (7017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:59:31,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6538 states to 6538 states and 7017 transitions. [2024-12-02 10:59:31,399 INFO L78 Accepts]: Start accepts. Automaton has 6538 states and 7017 transitions. Word has length 129 [2024-12-02 10:59:31,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:59:31,400 INFO L471 AbstractCegarLoop]: Abstraction has 6538 states and 7017 transitions. [2024-12-02 10:59:31,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 122 states have (on average 3.1557377049180326) internal successors, (385), 123 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:59:31,400 INFO L276 IsEmpty]: Start isEmpty. Operand 6538 states and 7017 transitions. [2024-12-02 10:59:31,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-12-02 10:59:31,402 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:59:31,402 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:59:31,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2024-12-02 10:59:31,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2024-12-02 10:59:31,603 INFO L396 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:59:31,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:59:31,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1950504219, now seen corresponding path program 2 times [2024-12-02 10:59:31,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:59:31,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324645011] [2024-12-02 10:59:31,603 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:59:31,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:59:31,633 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:59:31,633 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:59:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 276 proven. 508 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:59:33,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:59:33,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324645011] [2024-12-02 10:59:33,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324645011] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:59:33,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635840738] [2024-12-02 10:59:33,072 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:59:33,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:59:33,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:59:33,073 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:59:33,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-12-02 10:59:33,414 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:59:33,414 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:59:33,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 234 conjuncts are in the unsatisfiable core [2024-12-02 10:59:33,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:59:33,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-12-02 10:59:37,072 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:59:37,072 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:59:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:59:40,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635840738] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:59:40,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:59:40,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 40, 40] total 114 [2024-12-02 10:59:40,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692723428] [2024-12-02 10:59:40,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:59:40,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2024-12-02 10:59:40,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:59:40,438 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2024-12-02 10:59:40,438 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1192, Invalid=11918, Unknown=0, NotChecked=0, Total=13110 [2024-12-02 10:59:40,438 INFO L87 Difference]: Start difference. First operand 6538 states and 7017 transitions. Second operand has 115 states, 114 states have (on average 3.4035087719298245) internal successors, (388), 115 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:59:46,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:59:46,895 INFO L93 Difference]: Finished difference Result 7350 states and 7845 transitions. [2024-12-02 10:59:46,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2024-12-02 10:59:46,895 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 114 states have (on average 3.4035087719298245) internal successors, (388), 115 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2024-12-02 10:59:46,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:59:46,899 INFO L225 Difference]: With dead ends: 7350 [2024-12-02 10:59:46,899 INFO L226 Difference]: Without dead ends: 7350 [2024-12-02 10:59:46,900 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8999 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=2652, Invalid=26418, Unknown=0, NotChecked=0, Total=29070 [2024-12-02 10:59:46,900 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 465 mSDsluCounter, 3061 mSDsCounter, 0 mSdLazyCounter, 6948 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 3137 SdHoareTripleChecker+Invalid, 7109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 6948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:59:46,900 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 3137 Invalid, 7109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 6948 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-12-02 10:59:46,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7350 states. [2024-12-02 10:59:46,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7350 to 6539. [2024-12-02 10:59:46,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6539 states, 6537 states have (on average 1.0737341288052624) internal successors, (7019), 6538 states have internal predecessors, (7019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:59:46,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6539 states to 6539 states and 7019 transitions. [2024-12-02 10:59:46,967 INFO L78 Accepts]: Start accepts. Automaton has 6539 states and 7019 transitions. Word has length 130 [2024-12-02 10:59:46,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:59:46,967 INFO L471 AbstractCegarLoop]: Abstraction has 6539 states and 7019 transitions. [2024-12-02 10:59:46,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 114 states have (on average 3.4035087719298245) internal successors, (388), 115 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:59:46,967 INFO L276 IsEmpty]: Start isEmpty. Operand 6539 states and 7019 transitions. [2024-12-02 10:59:46,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-12-02 10:59:46,969 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:59:46,969 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:59:46,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2024-12-02 10:59:47,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:59:47,170 INFO L396 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 10:59:47,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:59:47,170 INFO L85 PathProgramCache]: Analyzing trace with hash 315260750, now seen corresponding path program 28 times [2024-12-02 10:59:47,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:59:47,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302252057] [2024-12-02 10:59:47,171 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:59:47,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:59:47,247 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:59:47,247 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:59:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 136 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:59:48,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:59:48,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302252057] [2024-12-02 10:59:48,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302252057] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:59:48,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118723664] [2024-12-02 10:59:48,734 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:59:48,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:59:48,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:59:48,735 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:59:48,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2024-12-02 10:59:50,335 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:59:50,335 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:59:50,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 172 conjuncts are in the unsatisfiable core [2024-12-02 10:59:50,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:59:50,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 10:59:50,400 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 [2024-12-02 10:59:53,692 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 157 proven. 267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:59:53,692 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:59:57,108 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 211 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:59:57,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118723664] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:59:57,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:59:57,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 110 [2024-12-02 10:59:57,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149597319] [2024-12-02 10:59:57,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:59:57,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2024-12-02 10:59:57,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:59:57,109 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2024-12-02 10:59:57,110 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=963, Invalid=11247, Unknown=0, NotChecked=0, Total=12210 [2024-12-02 10:59:57,110 INFO L87 Difference]: Start difference. First operand 6539 states and 7019 transitions. Second operand has 111 states, 110 states have (on average 3.5545454545454547) internal successors, (391), 111 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:00:03,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:00:03,602 INFO L93 Difference]: Finished difference Result 7804 states and 8306 transitions. [2024-12-02 11:00:03,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2024-12-02 11:00:03,602 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 110 states have (on average 3.5545454545454547) internal successors, (391), 111 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2024-12-02 11:00:03,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:00:03,606 INFO L225 Difference]: With dead ends: 7804 [2024-12-02 11:00:03,606 INFO L226 Difference]: Without dead ends: 7532 [2024-12-02 11:00:03,607 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8564 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=2136, Invalid=26256, Unknown=0, NotChecked=0, Total=28392 [2024-12-02 11:00:03,607 INFO L435 NwaCegarLoop]: 99 mSDtfsCounter, 223 mSDsluCounter, 3792 mSDsCounter, 0 mSdLazyCounter, 8200 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 3891 SdHoareTripleChecker+Invalid, 8258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 8200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-12-02 11:00:03,607 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 3891 Invalid, 8258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 8200 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-12-02 11:00:03,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7532 states. [2024-12-02 11:00:03,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7532 to 6559. [2024-12-02 11:00:03,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6559 states, 6557 states have (on average 1.0732042092420315) internal successors, (7037), 6558 states have internal predecessors, (7037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:00:03,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6559 states to 6559 states and 7037 transitions. [2024-12-02 11:00:03,668 INFO L78 Accepts]: Start accepts. Automaton has 6559 states and 7037 transitions. Word has length 131 [2024-12-02 11:00:03,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:00:03,668 INFO L471 AbstractCegarLoop]: Abstraction has 6559 states and 7037 transitions. [2024-12-02 11:00:03,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 110 states have (on average 3.5545454545454547) internal successors, (391), 111 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:00:03,668 INFO L276 IsEmpty]: Start isEmpty. Operand 6559 states and 7037 transitions. [2024-12-02 11:00:03,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-12-02 11:00:03,670 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:00:03,670 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:00:03,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2024-12-02 11:00:03,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2024-12-02 11:00:03,871 INFO L396 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 11:00:03,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:00:03,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1871635109, now seen corresponding path program 29 times [2024-12-02 11:00:03,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:00:03,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401333227] [2024-12-02 11:00:03,872 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 11:00:03,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:00:03,912 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-12-02 11:00:03,912 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:00:05,412 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 282 proven. 339 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:00:05,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:00:05,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401333227] [2024-12-02 11:00:05,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401333227] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:00:05,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802302572] [2024-12-02 11:00:05,413 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 11:00:05,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:00:05,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:00:05,414 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:00:05,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2024-12-02 11:00:06,449 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-12-02 11:00:06,449 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:00:06,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 139 conjuncts are in the unsatisfiable core [2024-12-02 11:00:06,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:00:06,497 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 [2024-12-02 11:00:06,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 11:00:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 274 proven. 347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:00:09,896 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:00:13,083 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 340 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:00:13,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802302572] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:00:13,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:00:13,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39, 39] total 117 [2024-12-02 11:00:13,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428683046] [2024-12-02 11:00:13,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:00:13,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2024-12-02 11:00:13,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:00:13,084 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2024-12-02 11:00:13,085 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1050, Invalid=12756, Unknown=0, NotChecked=0, Total=13806 [2024-12-02 11:00:13,085 INFO L87 Difference]: Start difference. First operand 6559 states and 7037 transitions. Second operand has 118 states, 117 states have (on average 3.393162393162393) internal successors, (397), 118 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:00:20,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:00:20,634 INFO L93 Difference]: Finished difference Result 7370 states and 7849 transitions. [2024-12-02 11:00:20,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-12-02 11:00:20,634 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 117 states have (on average 3.393162393162393) internal successors, (397), 118 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2024-12-02 11:00:20,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:00:20,638 INFO L225 Difference]: With dead ends: 7370 [2024-12-02 11:00:20,638 INFO L226 Difference]: Without dead ends: 7102 [2024-12-02 11:00:20,639 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8545 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=2814, Invalid=27986, Unknown=0, NotChecked=0, Total=30800 [2024-12-02 11:00:20,639 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 145 mSDsluCounter, 4463 mSDsCounter, 0 mSdLazyCounter, 10240 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 4548 SdHoareTripleChecker+Invalid, 10313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 10240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-12-02 11:00:20,639 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 4548 Invalid, 10313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 10240 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-12-02 11:00:20,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7102 states. [2024-12-02 11:00:20,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7102 to 6347. [2024-12-02 11:00:20,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6347 states, 6345 states have (on average 1.070921985815603) internal successors, (6795), 6346 states have internal predecessors, (6795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:00:20,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6347 states to 6347 states and 6795 transitions. [2024-12-02 11:00:20,694 INFO L78 Accepts]: Start accepts. Automaton has 6347 states and 6795 transitions. Word has length 133 [2024-12-02 11:00:20,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:00:20,694 INFO L471 AbstractCegarLoop]: Abstraction has 6347 states and 6795 transitions. [2024-12-02 11:00:20,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 117 states have (on average 3.393162393162393) internal successors, (397), 118 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:00:20,695 INFO L276 IsEmpty]: Start isEmpty. Operand 6347 states and 6795 transitions. [2024-12-02 11:00:20,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-12-02 11:00:20,697 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:00:20,697 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:00:20,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2024-12-02 11:00:20,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2024-12-02 11:00:20,897 INFO L396 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 11:00:20,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:00:20,898 INFO L85 PathProgramCache]: Analyzing trace with hash 314812825, now seen corresponding path program 30 times [2024-12-02 11:00:20,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:00:20,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695132802] [2024-12-02 11:00:20,898 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 11:00:20,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:00:20,949 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-12-02 11:00:20,949 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:00:22,424 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 168 proven. 350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:00:22,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:00:22,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695132802] [2024-12-02 11:00:22,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695132802] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:00:22,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148748656] [2024-12-02 11:00:22,424 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 11:00:22,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:00:22,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:00:22,426 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:00:22,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2024-12-02 11:00:25,044 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-12-02 11:00:25,044 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:00:25,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 152 conjuncts are in the unsatisfiable core [2024-12-02 11:00:25,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:00:25,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 11:00:25,102 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 [2024-12-02 11:00:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 0 proven. 518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:00:28,584 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:00:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 0 proven. 518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:00:31,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148748656] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:00:31,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:00:31,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 128 [2024-12-02 11:00:31,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216901767] [2024-12-02 11:00:31,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:00:31,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2024-12-02 11:00:31,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:00:31,806 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2024-12-02 11:00:31,806 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=15056, Unknown=0, NotChecked=0, Total=16512 [2024-12-02 11:00:31,806 INFO L87 Difference]: Start difference. First operand 6347 states and 6795 transitions. Second operand has 129 states, 128 states have (on average 3.1484375) internal successors, (403), 129 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:00:38,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:00:38,830 INFO L93 Difference]: Finished difference Result 7074 states and 7529 transitions. [2024-12-02 11:00:38,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-12-02 11:00:38,830 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 128 states have (on average 3.1484375) internal successors, (403), 129 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2024-12-02 11:00:38,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:00:38,834 INFO L225 Difference]: With dead ends: 7074 [2024-12-02 11:00:38,834 INFO L226 Difference]: Without dead ends: 6904 [2024-12-02 11:00:38,835 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10582 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=2753, Invalid=29109, Unknown=0, NotChecked=0, Total=31862 [2024-12-02 11:00:38,835 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 368 mSDsluCounter, 3262 mSDsCounter, 0 mSdLazyCounter, 8788 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 3337 SdHoareTripleChecker+Invalid, 8819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 8788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-12-02 11:00:38,835 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 3337 Invalid, 8819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 8788 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-12-02 11:00:38,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6904 states. [2024-12-02 11:00:38,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6904 to 6386. [2024-12-02 11:00:38,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6386 states, 6384 states have (on average 1.0712719298245614) internal successors, (6839), 6385 states have internal predecessors, (6839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:00:38,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6386 states to 6386 states and 6839 transitions. [2024-12-02 11:00:38,896 INFO L78 Accepts]: Start accepts. Automaton has 6386 states and 6839 transitions. Word has length 135 [2024-12-02 11:00:38,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:00:38,896 INFO L471 AbstractCegarLoop]: Abstraction has 6386 states and 6839 transitions. [2024-12-02 11:00:38,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 128 states have (on average 3.1484375) internal successors, (403), 129 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:00:38,897 INFO L276 IsEmpty]: Start isEmpty. Operand 6386 states and 6839 transitions. [2024-12-02 11:00:38,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-12-02 11:00:38,898 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:00:38,899 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:00:38,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2024-12-02 11:00:39,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2024-12-02 11:00:39,099 INFO L396 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 11:00:39,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:00:39,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1390640955, now seen corresponding path program 19 times [2024-12-02 11:00:39,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:00:39,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951946058] [2024-12-02 11:00:39,100 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 11:00:39,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:00:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:00:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 435 proven. 603 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:00:40,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:00:40,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951946058] [2024-12-02 11:00:40,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951946058] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:00:40,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939866832] [2024-12-02 11:00:40,552 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 11:00:40,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:00:40,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:00:40,554 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:00:40,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2024-12-02 11:00:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:00:40,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-12-02 11:00:40,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:00:41,639 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 [2024-12-02 11:00:42,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 35 proven. 1003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:00:42,747 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:00:42,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 11:00:42,819 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 [2024-12-02 11:00:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 35 proven. 1003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:00:43,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939866832] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:00:43,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:00:43,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 85 [2024-12-02 11:00:43,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107897372] [2024-12-02 11:00:43,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:00:43,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-12-02 11:00:43,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:00:43,010 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-12-02 11:00:43,010 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=6841, Unknown=0, NotChecked=0, Total=7140 [2024-12-02 11:00:43,011 INFO L87 Difference]: Start difference. First operand 6386 states and 6839 transitions. Second operand has 85 states, 85 states have (on average 3.2470588235294118) internal successors, (276), 85 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:00:48,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:00:48,686 INFO L93 Difference]: Finished difference Result 7985 states and 8545 transitions. [2024-12-02 11:00:48,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-12-02 11:00:48,686 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.2470588235294118) internal successors, (276), 85 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2024-12-02 11:00:48,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:00:48,690 INFO L225 Difference]: With dead ends: 7985 [2024-12-02 11:00:48,690 INFO L226 Difference]: Without dead ends: 7928 [2024-12-02 11:00:48,691 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3724 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=942, Invalid=19650, Unknown=0, NotChecked=0, Total=20592 [2024-12-02 11:00:48,691 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 229 mSDsluCounter, 4277 mSDsCounter, 0 mSdLazyCounter, 9311 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 4352 SdHoareTripleChecker+Invalid, 9350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 9311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-12-02 11:00:48,691 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 4352 Invalid, 9350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 9311 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-12-02 11:00:48,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7928 states. [2024-12-02 11:00:48,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7928 to 7283. [2024-12-02 11:00:48,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7283 states, 7281 states have (on average 1.0752643867600604) internal successors, (7829), 7282 states have internal predecessors, (7829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:00:48,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7283 states to 7283 states and 7829 transitions. [2024-12-02 11:00:48,742 INFO L78 Accepts]: Start accepts. Automaton has 7283 states and 7829 transitions. Word has length 136 [2024-12-02 11:00:48,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:00:48,742 INFO L471 AbstractCegarLoop]: Abstraction has 7283 states and 7829 transitions. [2024-12-02 11:00:48,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.2470588235294118) internal successors, (276), 85 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:00:48,742 INFO L276 IsEmpty]: Start isEmpty. Operand 7283 states and 7829 transitions. [2024-12-02 11:00:48,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-12-02 11:00:48,745 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:00:48,745 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:00:48,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2024-12-02 11:00:48,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2024-12-02 11:00:48,945 INFO L396 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 11:00:48,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:00:48,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1402143771, now seen corresponding path program 16 times [2024-12-02 11:00:48,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:00:48,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186823879] [2024-12-02 11:00:48,945 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 11:00:48,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:00:48,988 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 11:00:48,988 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:00:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 497 proven. 409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:00:50,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:00:50,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186823879] [2024-12-02 11:00:50,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186823879] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:00:50,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543883934] [2024-12-02 11:00:50,738 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 11:00:50,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:00:50,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:00:50,740 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:00:50,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2024-12-02 11:00:55,643 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 11:00:55,643 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:00:55,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 160 conjuncts are in the unsatisfiable core [2024-12-02 11:00:55,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:00:56,328 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 [2024-12-02 11:00:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 105 proven. 798 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 11:00:57,336 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:00:57,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 11:00:57,420 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 [2024-12-02 11:00:57,583 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 105 proven. 798 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 11:00:57,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543883934] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:00:57,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:00:57,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 37, 37] total 77 [2024-12-02 11:00:57,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062298237] [2024-12-02 11:00:57,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:00:57,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-12-02 11:00:57,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:00:57,584 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-12-02 11:00:57,585 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=5552, Unknown=0, NotChecked=0, Total=5852 [2024-12-02 11:00:57,585 INFO L87 Difference]: Start difference. First operand 7283 states and 7829 transitions. Second operand has 77 states, 77 states have (on average 3.5454545454545454) internal successors, (273), 77 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:01:03,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:01:03,748 INFO L93 Difference]: Finished difference Result 10307 states and 10990 transitions. [2024-12-02 11:01:03,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-12-02 11:01:03,748 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.5454545454545454) internal successors, (273), 77 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2024-12-02 11:01:03,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:01:03,753 INFO L225 Difference]: With dead ends: 10307 [2024-12-02 11:01:03,753 INFO L226 Difference]: Without dead ends: 10110 [2024-12-02 11:01:03,754 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4575 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1416, Invalid=21536, Unknown=0, NotChecked=0, Total=22952 [2024-12-02 11:01:03,754 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 94 mSDsluCounter, 2564 mSDsCounter, 0 mSdLazyCounter, 7170 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 2619 SdHoareTripleChecker+Invalid, 7213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 7170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-12-02 11:01:03,754 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 2619 Invalid, 7213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 7170 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-12-02 11:01:03,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10110 states. [2024-12-02 11:01:03,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10110 to 7982. [2024-12-02 11:01:03,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7982 states, 7980 states have (on average 1.0773182957393483) internal successors, (8597), 7981 states have internal predecessors, (8597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:01:03,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7982 states to 7982 states and 8597 transitions. [2024-12-02 11:01:03,812 INFO L78 Accepts]: Start accepts. Automaton has 7982 states and 8597 transitions. Word has length 138 [2024-12-02 11:01:03,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:01:03,812 INFO L471 AbstractCegarLoop]: Abstraction has 7982 states and 8597 transitions. [2024-12-02 11:01:03,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.5454545454545454) internal successors, (273), 77 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:01:03,812 INFO L276 IsEmpty]: Start isEmpty. Operand 7982 states and 8597 transitions. [2024-12-02 11:01:03,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-12-02 11:01:03,815 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:01:03,815 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:01:03,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2024-12-02 11:01:04,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2024-12-02 11:01:04,016 INFO L396 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 11:01:04,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:01:04,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1273324120, now seen corresponding path program 31 times [2024-12-02 11:01:04,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:01:04,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839281795] [2024-12-02 11:01:04,016 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 11:01:04,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:01:04,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:01:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 378 proven. 514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:01:05,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:01:05,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839281795] [2024-12-02 11:01:05,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839281795] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:01:05,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222121440] [2024-12-02 11:01:05,476 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 11:01:05,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:01:05,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:01:05,478 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:01:05,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2024-12-02 11:01:05,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:01:05,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 128 conjuncts are in the unsatisfiable core [2024-12-02 11:01:05,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:01:05,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 11:01:10,737 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 435 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:01:10,737 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:01:14,681 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 496 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:01:14,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222121440] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:01:14,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:01:14,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 44, 44] total 128 [2024-12-02 11:01:14,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600956395] [2024-12-02 11:01:14,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:01:14,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2024-12-02 11:01:14,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:01:14,682 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2024-12-02 11:01:14,683 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1704, Invalid=14808, Unknown=0, NotChecked=0, Total=16512 [2024-12-02 11:01:14,683 INFO L87 Difference]: Start difference. First operand 7982 states and 8597 transitions. Second operand has 129 states, 128 states have (on average 3.21875) internal successors, (412), 129 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:01:19,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:01:19,659 INFO L93 Difference]: Finished difference Result 8894 states and 9507 transitions. [2024-12-02 11:01:19,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-12-02 11:01:19,659 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 128 states have (on average 3.21875) internal successors, (412), 129 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2024-12-02 11:01:19,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:01:19,663 INFO L225 Difference]: With dead ends: 8894 [2024-12-02 11:01:19,663 INFO L226 Difference]: Without dead ends: 8622 [2024-12-02 11:01:19,664 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8535 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=2792, Invalid=24268, Unknown=0, NotChecked=0, Total=27060 [2024-12-02 11:01:19,664 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 135 mSDsluCounter, 2553 mSDsCounter, 0 mSdLazyCounter, 5532 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 2630 SdHoareTripleChecker+Invalid, 5583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 5532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-12-02 11:01:19,664 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 2630 Invalid, 5583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 5532 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-12-02 11:01:19,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8622 states. [2024-12-02 11:01:19,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8622 to 7417. [2024-12-02 11:01:19,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7417 states, 7415 states have (on average 1.0739042481456507) internal successors, (7963), 7416 states have internal predecessors, (7963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:01:19,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7417 states to 7417 states and 7963 transitions. [2024-12-02 11:01:19,713 INFO L78 Accepts]: Start accepts. Automaton has 7417 states and 7963 transitions. Word has length 138 [2024-12-02 11:01:19,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:01:19,713 INFO L471 AbstractCegarLoop]: Abstraction has 7417 states and 7963 transitions. [2024-12-02 11:01:19,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 128 states have (on average 3.21875) internal successors, (412), 129 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:01:19,714 INFO L276 IsEmpty]: Start isEmpty. Operand 7417 states and 7963 transitions. [2024-12-02 11:01:19,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-12-02 11:01:19,716 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:01:19,717 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:01:19,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2024-12-02 11:01:19,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2024-12-02 11:01:19,917 INFO L396 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 11:01:19,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:01:19,917 INFO L85 PathProgramCache]: Analyzing trace with hash -566642997, now seen corresponding path program 32 times [2024-12-02 11:01:19,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:01:19,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717738282] [2024-12-02 11:01:19,917 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 11:01:19,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:01:19,946 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 11:01:19,946 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:01:21,508 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 148 proven. 375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:01:21,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:01:21,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717738282] [2024-12-02 11:01:21,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717738282] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:01:21,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596464844] [2024-12-02 11:01:21,508 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 11:01:21,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:01:21,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:01:21,510 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:01:21,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2024-12-02 11:01:21,867 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 11:01:21,867 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:01:21,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 212 conjuncts are in the unsatisfiable core [2024-12-02 11:01:21,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:01:21,911 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 [2024-12-02 11:01:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 0 proven. 523 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:01:25,658 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:01:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 0 proven. 523 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:01:29,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596464844] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:01:29,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:01:29,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 42] total 123 [2024-12-02 11:01:29,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950184858] [2024-12-02 11:01:29,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:01:29,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2024-12-02 11:01:29,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:01:29,073 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2024-12-02 11:01:29,073 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1100, Invalid=14152, Unknown=0, NotChecked=0, Total=15252 [2024-12-02 11:01:29,074 INFO L87 Difference]: Start difference. First operand 7417 states and 7963 transitions. Second operand has 124 states, 123 states have (on average 3.3983739837398375) internal successors, (418), 124 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:01:38,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:01:38,508 INFO L93 Difference]: Finished difference Result 9027 states and 9611 transitions. [2024-12-02 11:01:38,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2024-12-02 11:01:38,508 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 123 states have (on average 3.3983739837398375) internal successors, (418), 124 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2024-12-02 11:01:38,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:01:38,512 INFO L225 Difference]: With dead ends: 9027 [2024-12-02 11:01:38,512 INFO L226 Difference]: Without dead ends: 8703 [2024-12-02 11:01:38,513 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13623 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=3617, Invalid=39855, Unknown=0, NotChecked=0, Total=43472 [2024-12-02 11:01:38,514 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 721 mSDsluCounter, 4805 mSDsCounter, 0 mSdLazyCounter, 11161 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 4901 SdHoareTripleChecker+Invalid, 11293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 11161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-12-02 11:01:38,514 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 4901 Invalid, 11293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 11161 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-12-02 11:01:38,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8703 states. [2024-12-02 11:01:38,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8703 to 7321. [2024-12-02 11:01:38,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7321 states, 7319 states have (on average 1.0711845880584778) internal successors, (7840), 7320 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:01:38,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7321 states to 7321 states and 7840 transitions. [2024-12-02 11:01:38,561 INFO L78 Accepts]: Start accepts. Automaton has 7321 states and 7840 transitions. Word has length 140 [2024-12-02 11:01:38,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:01:38,562 INFO L471 AbstractCegarLoop]: Abstraction has 7321 states and 7840 transitions. [2024-12-02 11:01:38,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 123 states have (on average 3.3983739837398375) internal successors, (418), 124 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:01:38,562 INFO L276 IsEmpty]: Start isEmpty. Operand 7321 states and 7840 transitions. [2024-12-02 11:01:38,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-12-02 11:01:38,564 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:01:38,565 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:01:38,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2024-12-02 11:01:38,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2024-12-02 11:01:38,765 INFO L396 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 11:01:38,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:01:38,765 INFO L85 PathProgramCache]: Analyzing trace with hash -423094398, now seen corresponding path program 17 times [2024-12-02 11:01:38,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:01:38,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111581184] [2024-12-02 11:01:38,765 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 11:01:38,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:01:38,825 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-12-02 11:01:38,825 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:01:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 338 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:01:41,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:01:41,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111581184] [2024-12-02 11:01:41,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111581184] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:01:41,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808108686] [2024-12-02 11:01:41,062 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 11:01:41,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:01:41,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:01:41,064 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:01:41,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2024-12-02 11:01:50,203 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-12-02 11:01:50,203 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:01:50,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 170 conjuncts are in the unsatisfiable core [2024-12-02 11:01:50,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:01:50,940 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 [2024-12-02 11:01:52,117 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 48 proven. 915 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:01:52,117 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:01:52,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 11:01:52,194 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 [2024-12-02 11:01:52,399 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 48 proven. 915 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:01:52,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808108686] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:01:52,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:01:52,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 39, 39] total 85 [2024-12-02 11:01:52,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236694242] [2024-12-02 11:01:52,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:01:52,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-12-02 11:01:52,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:01:52,400 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-12-02 11:01:52,400 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=6853, Unknown=0, NotChecked=0, Total=7140 [2024-12-02 11:01:52,401 INFO L87 Difference]: Start difference. First operand 7321 states and 7840 transitions. Second operand has 85 states, 85 states have (on average 3.388235294117647) internal successors, (288), 85 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:01:58,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:01:58,859 INFO L93 Difference]: Finished difference Result 8834 states and 9430 transitions. [2024-12-02 11:01:58,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2024-12-02 11:01:58,859 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.388235294117647) internal successors, (288), 85 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2024-12-02 11:01:58,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:01:58,863 INFO L225 Difference]: With dead ends: 8834 [2024-12-02 11:01:58,863 INFO L226 Difference]: Without dead ends: 8564 [2024-12-02 11:01:58,864 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5241 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=962, Invalid=24798, Unknown=0, NotChecked=0, Total=25760 [2024-12-02 11:01:58,865 INFO L435 NwaCegarLoop]: 71 mSDtfsCounter, 155 mSDsluCounter, 3665 mSDsCounter, 0 mSdLazyCounter, 8459 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 3736 SdHoareTripleChecker+Invalid, 8492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 8459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-12-02 11:01:58,865 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 3736 Invalid, 8492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 8459 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-12-02 11:01:58,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8564 states. [2024-12-02 11:01:58,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8564 to 8013. [2024-12-02 11:01:58,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8013 states, 8011 states have (on average 1.0732742479091248) internal successors, (8598), 8012 states have internal predecessors, (8598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:01:58,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8013 states to 8013 states and 8598 transitions. [2024-12-02 11:01:58,917 INFO L78 Accepts]: Start accepts. Automaton has 8013 states and 8598 transitions. Word has length 142 [2024-12-02 11:01:58,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:01:58,917 INFO L471 AbstractCegarLoop]: Abstraction has 8013 states and 8598 transitions. [2024-12-02 11:01:58,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.388235294117647) internal successors, (288), 85 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:01:58,917 INFO L276 IsEmpty]: Start isEmpty. Operand 8013 states and 8598 transitions. [2024-12-02 11:01:58,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-12-02 11:01:58,920 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:01:58,920 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:01:58,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2024-12-02 11:01:59,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2024-12-02 11:01:59,121 INFO L396 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 11:01:59,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:01:59,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1679154879, now seen corresponding path program 33 times [2024-12-02 11:01:59,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:01:59,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483928050] [2024-12-02 11:01:59,121 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 11:01:59,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:01:59,200 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-12-02 11:01:59,200 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:02:01,426 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 196 proven. 434 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:02:01,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:02:01,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483928050] [2024-12-02 11:02:01,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483928050] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:02:01,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108053661] [2024-12-02 11:02:01,426 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 11:02:01,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:02:01,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:02:01,428 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:02:01,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2024-12-02 11:02:04,740 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-12-02 11:02:04,740 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:02:04,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 229 conjuncts are in the unsatisfiable core [2024-12-02 11:02:04,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:02:04,806 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 [2024-12-02 11:02:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:02:08,468 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:02:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:02:12,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108053661] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:02:12,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:02:12,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 43, 43] total 133 [2024-12-02 11:02:12,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17110916] [2024-12-02 11:02:12,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:02:12,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2024-12-02 11:02:12,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:02:12,018 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2024-12-02 11:02:12,018 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1642, Invalid=16180, Unknown=0, NotChecked=0, Total=17822 [2024-12-02 11:02:12,019 INFO L87 Difference]: Start difference. First operand 8013 states and 8598 transitions. Second operand has 134 states, 133 states have (on average 3.18796992481203) internal successors, (424), 134 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:02:20,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:02:20,539 INFO L93 Difference]: Finished difference Result 9770 states and 10394 transitions. [2024-12-02 11:02:20,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2024-12-02 11:02:20,540 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 133 states have (on average 3.18796992481203) internal successors, (424), 134 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2024-12-02 11:02:20,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:02:20,544 INFO L225 Difference]: With dead ends: 9770 [2024-12-02 11:02:20,544 INFO L226 Difference]: Without dead ends: 9454 [2024-12-02 11:02:20,546 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15770 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=4420, Invalid=41162, Unknown=0, NotChecked=0, Total=45582 [2024-12-02 11:02:20,546 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 589 mSDsluCounter, 3774 mSDsCounter, 0 mSdLazyCounter, 8682 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 3870 SdHoareTripleChecker+Invalid, 8804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 8682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-12-02 11:02:20,546 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 3870 Invalid, 8804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 8682 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2024-12-02 11:02:20,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9454 states. [2024-12-02 11:02:20,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9454 to 8039. [2024-12-02 11:02:20,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8039 states, 8037 states have (on average 1.073037202936419) internal successors, (8624), 8038 states have internal predecessors, (8624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:02:20,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8039 states to 8039 states and 8624 transitions. [2024-12-02 11:02:20,599 INFO L78 Accepts]: Start accepts. Automaton has 8039 states and 8624 transitions. Word has length 142 [2024-12-02 11:02:20,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:02:20,599 INFO L471 AbstractCegarLoop]: Abstraction has 8039 states and 8624 transitions. [2024-12-02 11:02:20,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 133 states have (on average 3.18796992481203) internal successors, (424), 134 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:02:20,600 INFO L276 IsEmpty]: Start isEmpty. Operand 8039 states and 8624 transitions. [2024-12-02 11:02:20,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-12-02 11:02:20,603 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:02:20,603 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:02:20,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2024-12-02 11:02:20,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:02:20,803 INFO L396 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 11:02:20,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:02:20,803 INFO L85 PathProgramCache]: Analyzing trace with hash 163828668, now seen corresponding path program 20 times [2024-12-02 11:02:20,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:02:20,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225264309] [2024-12-02 11:02:20,803 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 11:02:20,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:02:20,827 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 11:02:20,827 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:02:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 496 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:02:22,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:02:22,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225264309] [2024-12-02 11:02:22,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225264309] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:02:22,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567963344] [2024-12-02 11:02:22,389 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 11:02:22,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:02:22,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:02:22,390 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:02:22,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2024-12-02 11:02:22,738 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 11:02:22,738 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:02:22,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 126 conjuncts are in the unsatisfiable core [2024-12-02 11:02:22,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:02:23,573 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 [2024-12-02 11:02:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 37 proven. 1125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:02:24,787 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:02:24,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 11:02:24,857 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 [2024-12-02 11:02:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 37 proven. 1125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:02:25,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567963344] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:02:25,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:02:25,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 90 [2024-12-02 11:02:25,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229729606] [2024-12-02 11:02:25,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:02:25,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2024-12-02 11:02:25,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:02:25,065 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2024-12-02 11:02:25,066 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=7685, Unknown=0, NotChecked=0, Total=8010 [2024-12-02 11:02:25,066 INFO L87 Difference]: Start difference. First operand 8039 states and 8624 transitions. Second operand has 90 states, 90 states have (on average 3.2222222222222223) internal successors, (290), 90 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:02:31,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:02:31,080 INFO L93 Difference]: Finished difference Result 9963 states and 10680 transitions. [2024-12-02 11:02:31,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-12-02 11:02:31,081 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.2222222222222223) internal successors, (290), 90 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2024-12-02 11:02:31,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:02:31,085 INFO L225 Difference]: With dead ends: 9963 [2024-12-02 11:02:31,085 INFO L226 Difference]: Without dead ends: 9903 [2024-12-02 11:02:31,086 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4173 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=992, Invalid=21960, Unknown=0, NotChecked=0, Total=22952 [2024-12-02 11:02:31,086 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 229 mSDsluCounter, 4867 mSDsCounter, 0 mSdLazyCounter, 10601 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 4945 SdHoareTripleChecker+Invalid, 10644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 10601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-12-02 11:02:31,086 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 4945 Invalid, 10644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 10601 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-12-02 11:02:31,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9903 states. [2024-12-02 11:02:31,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9903 to 9118. [2024-12-02 11:02:31,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9118 states, 9116 states have (on average 1.0771171566476525) internal successors, (9819), 9117 states have internal predecessors, (9819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:02:31,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9118 states to 9118 states and 9819 transitions. [2024-12-02 11:02:31,148 INFO L78 Accepts]: Start accepts. Automaton has 9118 states and 9819 transitions. Word has length 143 [2024-12-02 11:02:31,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:02:31,149 INFO L471 AbstractCegarLoop]: Abstraction has 9118 states and 9819 transitions. [2024-12-02 11:02:31,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.2222222222222223) internal successors, (290), 90 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:02:31,149 INFO L276 IsEmpty]: Start isEmpty. Operand 9118 states and 9819 transitions. [2024-12-02 11:02:31,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-12-02 11:02:31,152 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:02:31,152 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:02:31,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2024-12-02 11:02:31,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:02:31,353 INFO L396 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 11:02:31,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:02:31,353 INFO L85 PathProgramCache]: Analyzing trace with hash 94999219, now seen corresponding path program 34 times [2024-12-02 11:02:31,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:02:31,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010026275] [2024-12-02 11:02:31,353 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 11:02:31,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:02:31,532 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 11:02:31,532 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:02:33,314 INFO L134 CoverageAnalysis]: Checked inductivity of 797 backedges. 325 proven. 472 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:02:33,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:02:33,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010026275] [2024-12-02 11:02:33,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010026275] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:02:33,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5127248] [2024-12-02 11:02:33,314 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 11:02:33,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:02:33,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:02:33,315 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:02:33,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2024-12-02 11:02:39,314 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 11:02:39,314 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:02:39,324 INFO L256 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 232 conjuncts are in the unsatisfiable core [2024-12-02 11:02:39,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:02:39,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 11:02:39,397 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 [2024-12-02 11:02:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 797 backedges. 191 proven. 606 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:02:43,443 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:02:47,071 INFO L134 CoverageAnalysis]: Checked inductivity of 797 backedges. 384 proven. 413 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:02:47,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5127248] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:02:47,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:02:47,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 116 [2024-12-02 11:02:47,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306348902] [2024-12-02 11:02:47,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:02:47,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2024-12-02 11:02:47,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:02:47,072 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2024-12-02 11:02:47,073 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1174, Invalid=12398, Unknown=0, NotChecked=0, Total=13572 [2024-12-02 11:02:47,073 INFO L87 Difference]: Start difference. First operand 9118 states and 9819 transitions. Second operand has 117 states, 116 states have (on average 3.706896551724138) internal successors, (430), 117 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:02:55,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:02:55,470 INFO L93 Difference]: Finished difference Result 11018 states and 11739 transitions. [2024-12-02 11:02:55,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2024-12-02 11:02:55,470 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 116 states have (on average 3.706896551724138) internal successors, (430), 117 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2024-12-02 11:02:55,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:02:55,475 INFO L225 Difference]: With dead ends: 11018 [2024-12-02 11:02:55,475 INFO L226 Difference]: Without dead ends: 10612 [2024-12-02 11:02:55,476 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12463 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=3126, Invalid=37880, Unknown=0, NotChecked=0, Total=41006 [2024-12-02 11:02:55,477 INFO L435 NwaCegarLoop]: 94 mSDtfsCounter, 299 mSDsluCounter, 4235 mSDsCounter, 0 mSdLazyCounter, 9532 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 4329 SdHoareTripleChecker+Invalid, 9643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 9532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-12-02 11:02:55,477 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 4329 Invalid, 9643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 9532 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-12-02 11:02:55,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10612 states. [2024-12-02 11:02:55,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10612 to 9120. [2024-12-02 11:02:55,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9120 states, 9118 states have (on average 1.0771002412809827) internal successors, (9821), 9119 states have internal predecessors, (9821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:02:55,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9120 states to 9120 states and 9821 transitions. [2024-12-02 11:02:55,538 INFO L78 Accepts]: Start accepts. Automaton has 9120 states and 9821 transitions. Word has length 144 [2024-12-02 11:02:55,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:02:55,538 INFO L471 AbstractCegarLoop]: Abstraction has 9120 states and 9821 transitions. [2024-12-02 11:02:55,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 116 states have (on average 3.706896551724138) internal successors, (430), 117 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:02:55,538 INFO L276 IsEmpty]: Start isEmpty. Operand 9120 states and 9821 transitions. [2024-12-02 11:02:55,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-12-02 11:02:55,542 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:02:55,542 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:02:55,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2024-12-02 11:02:55,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:02:55,743 INFO L396 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 11:02:55,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:02:55,743 INFO L85 PathProgramCache]: Analyzing trace with hash 240337536, now seen corresponding path program 35 times [2024-12-02 11:02:55,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:02:55,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798667552] [2024-12-02 11:02:55,743 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 11:02:55,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:02:55,789 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-12-02 11:02:55,790 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:02:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 189 proven. 346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:02:57,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:02:57,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798667552] [2024-12-02 11:02:57,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798667552] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:02:57,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299271486] [2024-12-02 11:02:57,685 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 11:02:57,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:02:57,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:02:57,686 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:02:57,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2024-12-02 11:03:00,949 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-12-02 11:03:00,949 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:03:00,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 204 conjuncts are in the unsatisfiable core [2024-12-02 11:03:00,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:03:01,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 11:03:01,027 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 [2024-12-02 11:03:05,225 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:03:05,226 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:03:09,675 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:03:09,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299271486] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:03:09,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:03:09,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 45, 46] total 133 [2024-12-02 11:03:09,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164990009] [2024-12-02 11:03:09,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:03:09,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2024-12-02 11:03:09,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:03:09,676 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2024-12-02 11:03:09,677 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1119, Invalid=16703, Unknown=0, NotChecked=0, Total=17822 [2024-12-02 11:03:09,677 INFO L87 Difference]: Start difference. First operand 9120 states and 9821 transitions. Second operand has 134 states, 133 states have (on average 3.255639097744361) internal successors, (433), 134 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:03:21,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:03:21,668 INFO L93 Difference]: Finished difference Result 10571 states and 11306 transitions. [2024-12-02 11:03:21,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2024-12-02 11:03:21,668 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 133 states have (on average 3.255639097744361) internal successors, (433), 134 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2024-12-02 11:03:21,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:03:21,673 INFO L225 Difference]: With dead ends: 10571 [2024-12-02 11:03:21,673 INFO L226 Difference]: Without dead ends: 10303 [2024-12-02 11:03:21,675 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16232 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=3947, Invalid=48723, Unknown=0, NotChecked=0, Total=52670 [2024-12-02 11:03:21,675 INFO L435 NwaCegarLoop]: 101 mSDtfsCounter, 881 mSDsluCounter, 5741 mSDsCounter, 0 mSdLazyCounter, 13874 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 5842 SdHoareTripleChecker+Invalid, 14052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 13874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2024-12-02 11:03:21,675 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [881 Valid, 5842 Invalid, 14052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 13874 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2024-12-02 11:03:21,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10303 states. [2024-12-02 11:03:21,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10303 to 8977. [2024-12-02 11:03:21,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8977 states, 8975 states have (on average 1.0786629526462395) internal successors, (9681), 8976 states have internal predecessors, (9681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:03:21,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8977 states to 8977 states and 9681 transitions. [2024-12-02 11:03:21,732 INFO L78 Accepts]: Start accepts. Automaton has 8977 states and 9681 transitions. Word has length 145 [2024-12-02 11:03:21,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:03:21,732 INFO L471 AbstractCegarLoop]: Abstraction has 8977 states and 9681 transitions. [2024-12-02 11:03:21,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 133 states have (on average 3.255639097744361) internal successors, (433), 134 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:03:21,732 INFO L276 IsEmpty]: Start isEmpty. Operand 8977 states and 9681 transitions. [2024-12-02 11:03:21,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2024-12-02 11:03:21,736 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:03:21,736 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:03:21,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2024-12-02 11:03:21,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2024-12-02 11:03:21,936 INFO L396 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 11:03:21,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:03:21,937 INFO L85 PathProgramCache]: Analyzing trace with hash -927935833, now seen corresponding path program 3 times [2024-12-02 11:03:21,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:03:21,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78869928] [2024-12-02 11:03:21,937 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 11:03:21,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:03:21,995 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-12-02 11:03:21,995 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:03:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 378 proven. 646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:03:24,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:03:24,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78869928] [2024-12-02 11:03:24,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78869928] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:03:24,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318335295] [2024-12-02 11:03:24,311 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 11:03:24,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:03:24,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:03:24,313 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:03:24,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2024-12-02 11:03:42,976 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-12-02 11:03:42,976 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:03:42,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 242 conjuncts are in the unsatisfiable core [2024-12-02 11:03:43,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:03:43,076 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 [2024-12-02 11:03:43,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 11:03:46,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 435 proven. 589 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:03:46,495 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:03:49,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 496 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:03:49,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318335295] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:03:49,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:03:49,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 39, 39] total 128 [2024-12-02 11:03:49,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657333522] [2024-12-02 11:03:49,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:03:49,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2024-12-02 11:03:49,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:03:49,519 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2024-12-02 11:03:49,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1800, Invalid=14712, Unknown=0, NotChecked=0, Total=16512 [2024-12-02 11:03:49,520 INFO L87 Difference]: Start difference. First operand 8977 states and 9681 transitions. Second operand has 129 states, 128 states have (on average 3.40625) internal successors, (436), 129 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:03:55,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:03:55,122 INFO L93 Difference]: Finished difference Result 9998 states and 10716 transitions. [2024-12-02 11:03:55,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2024-12-02 11:03:55,122 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 128 states have (on average 3.40625) internal successors, (436), 129 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2024-12-02 11:03:55,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:03:55,126 INFO L225 Difference]: With dead ends: 9998 [2024-12-02 11:03:55,126 INFO L226 Difference]: Without dead ends: 9998 [2024-12-02 11:03:55,127 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9933 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=3032, Invalid=28120, Unknown=0, NotChecked=0, Total=31152 [2024-12-02 11:03:55,128 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 312 mSDsluCounter, 3046 mSDsCounter, 0 mSdLazyCounter, 6541 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 3134 SdHoareTripleChecker+Invalid, 6654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 6541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-12-02 11:03:55,128 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 3134 Invalid, 6654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 6541 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-12-02 11:03:55,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9998 states. [2024-12-02 11:03:55,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9998 to 8978. [2024-12-02 11:03:55,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8978 states, 8976 states have (on average 1.0787655971479502) internal successors, (9683), 8977 states have internal predecessors, (9683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:03:55,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8978 states to 8978 states and 9683 transitions. [2024-12-02 11:03:55,182 INFO L78 Accepts]: Start accepts. Automaton has 8978 states and 9683 transitions. Word has length 146 [2024-12-02 11:03:55,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:03:55,183 INFO L471 AbstractCegarLoop]: Abstraction has 8978 states and 9683 transitions. [2024-12-02 11:03:55,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 128 states have (on average 3.40625) internal successors, (436), 129 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:03:55,183 INFO L276 IsEmpty]: Start isEmpty. Operand 8978 states and 9683 transitions. [2024-12-02 11:03:55,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-12-02 11:03:55,186 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:03:55,187 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:03:55,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2024-12-02 11:03:55,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2024-12-02 11:03:55,387 INFO L396 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-12-02 11:03:55,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:03:55,387 INFO L85 PathProgramCache]: Analyzing trace with hash -994282857, now seen corresponding path program 36 times [2024-12-02 11:03:55,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:03:55,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337176367] [2024-12-02 11:03:55,387 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 11:03:55,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:03:55,443 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2024-12-02 11:03:55,443 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:03:58,312 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 342 proven. 472 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 11:03:58,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:03:58,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337176367] [2024-12-02 11:03:58,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337176367] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:03:58,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030332608] [2024-12-02 11:03:58,313 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 11:03:58,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:03:58,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:03:58,314 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:03:58,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c3d3f53-6b57-41f4-9f7c-b7d3774a218d/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2024-12-02 11:04:04,566 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2024-12-02 11:04:04,566 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:04:04,576 INFO L256 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 170 conjuncts are in the unsatisfiable core [2024-12-02 11:04:04,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:04:04,628 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 [2024-12-02 11:04:04,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 11:04:09,359 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 0 proven. 816 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:04:09,359 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:04:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 0 proven. 816 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:04:14,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030332608] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:04:14,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:04:14,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 47, 47] total 142 [2024-12-02 11:04:14,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95802248] [2024-12-02 11:04:14,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:04:14,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2024-12-02 11:04:14,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:04:14,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2024-12-02 11:04:14,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1153, Invalid=19153, Unknown=0, NotChecked=0, Total=20306 [2024-12-02 11:04:14,188 INFO L87 Difference]: Start difference. First operand 8978 states and 9683 transitions. Second operand has 143 states, 142 states have (on average 3.084507042253521) internal successors, (438), 143 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)