./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_iter.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_iter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya --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 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:56:28,816 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:56:28,875 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 05:56:28,879 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:56:28,879 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:56:28,900 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:56:28,900 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:56:28,901 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:56:28,901 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:56:28,902 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:56:28,902 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:56:28,903 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:56:28,904 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:56:28,904 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:56:28,905 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:56:28,905 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:56:28,906 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:56:28,906 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:56:28,907 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:56:28,907 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:56:28,907 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 05:56:28,908 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 05:56:28,908 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 05:56:28,909 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:56:28,909 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 05:56:28,910 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 05:56:28,910 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:56:28,911 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:56:28,911 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:56:28,912 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:56:28,912 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:56:28,912 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:56:28,912 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:56:28,913 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:56:28,913 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:56:28,913 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:56:28,913 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:56:28,914 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:56:28,914 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:56:28,914 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:56:28,914 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:56:28,914 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2023-11-29 05:56:29,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:56:29,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:56:29,155 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:56:29,156 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:56:29,156 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:56:29,158 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/verifythis/prefixsum_iter.c [2023-11-29 05:56:31,822 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:56:32,001 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:56:32,001 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/sv-benchmarks/c/verifythis/prefixsum_iter.c [2023-11-29 05:56:32,009 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/data/1ba848997/98fc3a005a344aef85ac2f278cd95792/FLAG15bc13fc3 [2023-11-29 05:56:32,021 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/data/1ba848997/98fc3a005a344aef85ac2f278cd95792 [2023-11-29 05:56:32,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:56:32,026 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:56:32,028 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:56:32,028 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:56:32,032 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:56:32,032 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:56:32" (1/1) ... [2023-11-29 05:56:32,033 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@784c48b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:56:32, skipping insertion in model container [2023-11-29 05:56:32,033 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:56:32" (1/1) ... [2023-11-29 05:56:32,053 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:56:32,196 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:56:32,209 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:56:32,234 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:56:32,250 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:56:32,250 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:56:32 WrapperNode [2023-11-29 05:56:32,250 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:56:32,251 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:56:32,252 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:56:32,252 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:56:32,259 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:56:32" (1/1) ... [2023-11-29 05:56:32,268 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:56:32" (1/1) ... [2023-11-29 05:56:32,293 INFO L138 Inliner]: procedures = 22, calls = 34, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 136 [2023-11-29 05:56:32,293 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:56:32,294 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:56:32,294 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:56:32,294 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:56:32,306 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:56:32" (1/1) ... [2023-11-29 05:56:32,306 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:56:32" (1/1) ... [2023-11-29 05:56:32,309 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:56:32" (1/1) ... [2023-11-29 05:56:32,327 INFO L175 MemorySlicer]: Split 16 memory accesses to 2 slices as follows [2, 14]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 6 writes are split as follows [0, 6]. [2023-11-29 05:56:32,327 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:56:32" (1/1) ... [2023-11-29 05:56:32,327 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:56:32" (1/1) ... [2023-11-29 05:56:32,336 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:56:32" (1/1) ... [2023-11-29 05:56:32,340 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:56:32" (1/1) ... [2023-11-29 05:56:32,342 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:56:32" (1/1) ... [2023-11-29 05:56:32,344 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:56:32" (1/1) ... [2023-11-29 05:56:32,347 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:56:32,348 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:56:32,348 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:56:32,348 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:56:32,349 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:56:32" (1/1) ... [2023-11-29 05:56:32,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:56:32,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:56:32,377 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:56:32,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:56:32,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:56:32,414 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 05:56:32,414 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 05:56:32,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:56:32,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 05:56:32,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 05:56:32,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 05:56:32,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 05:56:32,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:56:32,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:56:32,415 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 05:56:32,415 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 05:56:32,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-29 05:56:32,415 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-29 05:56:32,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:56:32,516 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:56:32,518 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:56:32,834 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:56:32,886 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:56:32,887 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-29 05:56:32,887 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:56:32 BoogieIcfgContainer [2023-11-29 05:56:32,887 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:56:32,890 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:56:32,890 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:56:32,893 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:56:32,893 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:56:32" (1/3) ... [2023-11-29 05:56:32,894 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5055f9fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:56:32, skipping insertion in model container [2023-11-29 05:56:32,894 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:56:32" (2/3) ... [2023-11-29 05:56:32,894 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5055f9fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:56:32, skipping insertion in model container [2023-11-29 05:56:32,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:56:32" (3/3) ... [2023-11-29 05:56:32,896 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2023-11-29 05:56:32,911 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:56:32,911 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2023-11-29 05:56:32,951 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:56:32,957 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@2f60ce6c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:56:32,957 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2023-11-29 05:56:32,961 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 80 states have internal predecessors, (96), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 05:56:32,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 05:56:32,969 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:56:32,970 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:56:32,970 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:56:32,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:32,976 INFO L85 PathProgramCache]: Analyzing trace with hash 897474452, now seen corresponding path program 1 times [2023-11-29 05:56:32,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:56:32,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533404089] [2023-11-29 05:56:32,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:32,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:56:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:33,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:56:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:33,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:56:33,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:33,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 05:56:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:33,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 05:56:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:56:33,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:33,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533404089] [2023-11-29 05:56:33,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533404089] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:56:33,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:56:33,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:56:33,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959205753] [2023-11-29 05:56:33,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:56:33,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:56:33,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:33,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:56:33,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:56:33,254 INFO L87 Difference]: Start difference. First operand has 87 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 80 states have internal predecessors, (96), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 05:56:33,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:56:33,337 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2023-11-29 05:56:33,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:56:33,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-11-29 05:56:33,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:56:33,348 INFO L225 Difference]: With dead ends: 87 [2023-11-29 05:56:33,348 INFO L226 Difference]: Without dead ends: 86 [2023-11-29 05:56:33,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:56:33,353 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 3 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:56:33,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 145 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:56:33,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-29 05:56:33,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-11-29 05:56:33,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 46 states have (on average 1.8695652173913044) internal successors, (86), 79 states have internal predecessors, (86), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 05:56:33,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2023-11-29 05:56:33,390 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 25 [2023-11-29 05:56:33,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:56:33,391 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2023-11-29 05:56:33,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 05:56:33,391 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2023-11-29 05:56:33,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 05:56:33,392 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:56:33,392 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:56:33,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:56:33,393 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:56:33,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:33,394 INFO L85 PathProgramCache]: Analyzing trace with hash 105211920, now seen corresponding path program 1 times [2023-11-29 05:56:33,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:56:33,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780083209] [2023-11-29 05:56:33,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:33,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:56:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:33,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:56:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:33,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:56:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:33,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 05:56:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:33,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 05:56:33,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:56:33,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:33,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780083209] [2023-11-29 05:56:33,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780083209] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:56:33,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:56:33,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:56:33,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537936154] [2023-11-29 05:56:33,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:56:33,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:56:33,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:33,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:56:33,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:56:33,655 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 05:56:33,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:56:33,793 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2023-11-29 05:56:33,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:56:33,794 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2023-11-29 05:56:33,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:56:33,795 INFO L225 Difference]: With dead ends: 84 [2023-11-29 05:56:33,795 INFO L226 Difference]: Without dead ends: 84 [2023-11-29 05:56:33,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:56:33,797 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 131 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:56:33,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 118 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:56:33,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-29 05:56:33,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-11-29 05:56:33,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.826086956521739) internal successors, (84), 77 states have internal predecessors, (84), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 05:56:33,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2023-11-29 05:56:33,807 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 25 [2023-11-29 05:56:33,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:56:33,809 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2023-11-29 05:56:33,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 05:56:33,809 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2023-11-29 05:56:33,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 05:56:33,810 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:56:33,810 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:56:33,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 05:56:33,811 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:56:33,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:33,811 INFO L85 PathProgramCache]: Analyzing trace with hash 105211921, now seen corresponding path program 1 times [2023-11-29 05:56:33,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:56:33,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936861708] [2023-11-29 05:56:33,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:33,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:56:33,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:34,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:56:34,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:34,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:56:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:34,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 05:56:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:34,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 05:56:34,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:34,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:56:34,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:34,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936861708] [2023-11-29 05:56:34,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936861708] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:56:34,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:56:34,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-29 05:56:34,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083666248] [2023-11-29 05:56:34,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:56:34,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:56:34,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:34,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:56:34,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:56:34,469 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 05:56:35,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:56:35,313 INFO L93 Difference]: Finished difference Result 223 states and 245 transitions. [2023-11-29 05:56:35,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:56:35,313 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2023-11-29 05:56:35,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:56:35,316 INFO L225 Difference]: With dead ends: 223 [2023-11-29 05:56:35,316 INFO L226 Difference]: Without dead ends: 223 [2023-11-29 05:56:35,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:56:35,318 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 497 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:56:35,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 434 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 05:56:35,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-11-29 05:56:35,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 122. [2023-11-29 05:56:35,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 81 states have (on average 1.8888888888888888) internal successors, (153), 112 states have internal predecessors, (153), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 05:56:35,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 167 transitions. [2023-11-29 05:56:35,331 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 167 transitions. Word has length 25 [2023-11-29 05:56:35,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:56:35,332 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 167 transitions. [2023-11-29 05:56:35,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 05:56:35,332 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 167 transitions. [2023-11-29 05:56:35,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 05:56:35,333 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:56:35,333 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:56:35,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 05:56:35,334 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:56:35,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:35,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1033397769, now seen corresponding path program 1 times [2023-11-29 05:56:35,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:56:35,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182617210] [2023-11-29 05:56:35,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:35,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:56:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:35,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:56:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:35,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:56:35,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:35,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 05:56:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:35,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 05:56:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:35,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:56:35,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:35,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182617210] [2023-11-29 05:56:35,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182617210] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:56:35,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:56:35,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:56:35,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642849610] [2023-11-29 05:56:35,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:56:35,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:56:35,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:35,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:56:35,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:56:35,417 INFO L87 Difference]: Start difference. First operand 122 states and 167 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 05:56:35,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:56:35,519 INFO L93 Difference]: Finished difference Result 121 states and 165 transitions. [2023-11-29 05:56:35,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:56:35,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2023-11-29 05:56:35,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:56:35,520 INFO L225 Difference]: With dead ends: 121 [2023-11-29 05:56:35,521 INFO L226 Difference]: Without dead ends: 121 [2023-11-29 05:56:35,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:56:35,522 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 128 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:56:35,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 126 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:56:35,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-29 05:56:35,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2023-11-29 05:56:35,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 81 states have (on average 1.8641975308641976) internal successors, (151), 111 states have internal predecessors, (151), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 05:56:35,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 165 transitions. [2023-11-29 05:56:35,533 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 165 transitions. Word has length 26 [2023-11-29 05:56:35,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:56:35,533 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 165 transitions. [2023-11-29 05:56:35,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 05:56:35,533 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 165 transitions. [2023-11-29 05:56:35,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 05:56:35,535 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:56:35,535 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:56:35,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 05:56:35,535 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:56:35,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:35,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1033397768, now seen corresponding path program 1 times [2023-11-29 05:56:35,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:56:35,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142906579] [2023-11-29 05:56:35,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:35,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:56:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:35,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:56:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:35,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:56:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:35,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 05:56:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:35,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 05:56:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:56:35,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:35,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142906579] [2023-11-29 05:56:35,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142906579] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:56:35,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:56:35,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:56:35,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168208930] [2023-11-29 05:56:35,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:56:35,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:56:35,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:35,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:56:35,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:56:35,811 INFO L87 Difference]: Start difference. First operand 121 states and 165 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 05:56:36,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:56:36,229 INFO L93 Difference]: Finished difference Result 209 states and 286 transitions. [2023-11-29 05:56:36,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:56:36,232 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2023-11-29 05:56:36,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:56:36,233 INFO L225 Difference]: With dead ends: 209 [2023-11-29 05:56:36,234 INFO L226 Difference]: Without dead ends: 209 [2023-11-29 05:56:36,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:56:36,235 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 348 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:56:36,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 187 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:56:36,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-11-29 05:56:36,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 123. [2023-11-29 05:56:36,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 84 states have (on average 1.8214285714285714) internal successors, (153), 113 states have internal predecessors, (153), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 05:56:36,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 167 transitions. [2023-11-29 05:56:36,245 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 167 transitions. Word has length 26 [2023-11-29 05:56:36,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:56:36,246 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 167 transitions. [2023-11-29 05:56:36,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 05:56:36,246 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 167 transitions. [2023-11-29 05:56:36,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 05:56:36,247 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:56:36,247 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:56:36,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 05:56:36,248 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:56:36,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:36,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2145655810, now seen corresponding path program 1 times [2023-11-29 05:56:36,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:56:36,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446158483] [2023-11-29 05:56:36,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:36,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:56:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:36,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:56:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:36,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:56:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:36,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 05:56:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:36,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:56:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:36,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:56:36,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:36,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446158483] [2023-11-29 05:56:36,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446158483] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:56:36,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082577219] [2023-11-29 05:56:36,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:36,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:56:36,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:56:36,684 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:56:36,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:56:36,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:36,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 05:56:36,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:56:37,043 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 6 treesize of output 5 [2023-11-29 05:56:37,060 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 [2023-11-29 05:56:37,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:56:37,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-29 05:56:37,312 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 05:56:37,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 05:56:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:56:37,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:56:37,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082577219] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:56:37,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:56:37,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2023-11-29 05:56:37,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115967719] [2023-11-29 05:56:37,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:56:37,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 05:56:37,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:37,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 05:56:37,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2023-11-29 05:56:37,878 INFO L87 Difference]: Start difference. First operand 123 states and 167 transitions. Second operand has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-29 05:56:39,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:56:39,036 INFO L93 Difference]: Finished difference Result 189 states and 236 transitions. [2023-11-29 05:56:39,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:56:39,037 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 26 [2023-11-29 05:56:39,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:56:39,039 INFO L225 Difference]: With dead ends: 189 [2023-11-29 05:56:39,039 INFO L226 Difference]: Without dead ends: 189 [2023-11-29 05:56:39,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 05:56:39,040 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 542 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 05:56:39,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 417 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 05:56:39,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-11-29 05:56:39,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 122. [2023-11-29 05:56:39,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 83 states have (on average 1.8072289156626506) internal successors, (150), 112 states have internal predecessors, (150), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 05:56:39,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 164 transitions. [2023-11-29 05:56:39,048 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 164 transitions. Word has length 26 [2023-11-29 05:56:39,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:56:39,049 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 164 transitions. [2023-11-29 05:56:39,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-29 05:56:39,049 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 164 transitions. [2023-11-29 05:56:39,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 05:56:39,050 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:56:39,050 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:56:39,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:56:39,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:56:39,255 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:56:39,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:39,256 INFO L85 PathProgramCache]: Analyzing trace with hash -957651009, now seen corresponding path program 1 times [2023-11-29 05:56:39,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:56:39,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793457090] [2023-11-29 05:56:39,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:39,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:56:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:39,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:56:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:39,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:56:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:39,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 05:56:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:39,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 05:56:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:39,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:56:39,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:39,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793457090] [2023-11-29 05:56:39,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793457090] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:56:39,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841674638] [2023-11-29 05:56:39,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:39,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:56:39,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:56:39,485 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:56:39,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:56:39,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:39,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 05:56:39,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:56:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:56:39,769 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:56:39,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841674638] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:56:39,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:56:39,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 16 [2023-11-29 05:56:39,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693620071] [2023-11-29 05:56:39,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:56:39,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:56:39,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:39,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:56:39,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-11-29 05:56:39,771 INFO L87 Difference]: Start difference. First operand 122 states and 164 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 05:56:40,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:56:40,029 INFO L93 Difference]: Finished difference Result 216 states and 237 transitions. [2023-11-29 05:56:40,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 05:56:40,029 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2023-11-29 05:56:40,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:56:40,031 INFO L225 Difference]: With dead ends: 216 [2023-11-29 05:56:40,031 INFO L226 Difference]: Without dead ends: 216 [2023-11-29 05:56:40,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:56:40,032 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 208 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:56:40,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 799 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:56:40,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-11-29 05:56:40,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 125. [2023-11-29 05:56:40,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 86 states have (on average 1.7790697674418605) internal successors, (153), 115 states have internal predecessors, (153), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 05:56:40,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 167 transitions. [2023-11-29 05:56:40,039 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 167 transitions. Word has length 28 [2023-11-29 05:56:40,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:56:40,039 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 167 transitions. [2023-11-29 05:56:40,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 05:56:40,040 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 167 transitions. [2023-11-29 05:56:40,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 05:56:40,041 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:56:40,041 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:56:40,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:56:40,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:56:40,244 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:56:40,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:40,244 INFO L85 PathProgramCache]: Analyzing trace with hash -959280041, now seen corresponding path program 1 times [2023-11-29 05:56:40,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:56:40,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759490665] [2023-11-29 05:56:40,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:40,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:56:40,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:40,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:56:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:40,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:56:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:40,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 05:56:40,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:40,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 05:56:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:56:40,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:40,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759490665] [2023-11-29 05:56:40,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759490665] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:56:40,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:56:40,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:56:40,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994774891] [2023-11-29 05:56:40,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:56:40,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:56:40,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:40,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:56:40,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:56:40,344 INFO L87 Difference]: Start difference. First operand 125 states and 167 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 05:56:40,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:56:40,474 INFO L93 Difference]: Finished difference Result 119 states and 155 transitions. [2023-11-29 05:56:40,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:56:40,475 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2023-11-29 05:56:40,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:56:40,476 INFO L225 Difference]: With dead ends: 119 [2023-11-29 05:56:40,476 INFO L226 Difference]: Without dead ends: 119 [2023-11-29 05:56:40,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:56:40,477 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 130 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:56:40,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 135 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:56:40,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-29 05:56:40,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2023-11-29 05:56:40,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 86 states have (on average 1.6395348837209303) internal successors, (141), 109 states have internal predecessors, (141), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 05:56:40,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 155 transitions. [2023-11-29 05:56:40,482 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 155 transitions. Word has length 28 [2023-11-29 05:56:40,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:56:40,483 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 155 transitions. [2023-11-29 05:56:40,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 05:56:40,483 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 155 transitions. [2023-11-29 05:56:40,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 05:56:40,484 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:56:40,484 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:56:40,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 05:56:40,484 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:56:40,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:40,485 INFO L85 PathProgramCache]: Analyzing trace with hash -959280040, now seen corresponding path program 1 times [2023-11-29 05:56:40,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:56:40,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126679659] [2023-11-29 05:56:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:40,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:56:40,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:40,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:56:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:40,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:56:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:40,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 05:56:40,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:40,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 05:56:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:40,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:56:40,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:40,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126679659] [2023-11-29 05:56:40,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126679659] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:56:40,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:56:40,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-29 05:56:40,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530827327] [2023-11-29 05:56:40,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:56:40,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:56:40,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:40,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:56:40,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:56:40,648 INFO L87 Difference]: Start difference. First operand 119 states and 155 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 05:56:40,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:56:40,833 INFO L93 Difference]: Finished difference Result 145 states and 161 transitions. [2023-11-29 05:56:40,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:56:40,834 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2023-11-29 05:56:40,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:56:40,835 INFO L225 Difference]: With dead ends: 145 [2023-11-29 05:56:40,835 INFO L226 Difference]: Without dead ends: 145 [2023-11-29 05:56:40,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:56:40,836 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 143 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:56:40,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 435 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:56:40,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-29 05:56:40,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 91. [2023-11-29 05:56:40,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 58 states have (on average 1.5344827586206897) internal successors, (89), 81 states have internal predecessors, (89), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 05:56:40,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2023-11-29 05:56:40,840 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 28 [2023-11-29 05:56:40,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:56:40,841 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2023-11-29 05:56:40,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 05:56:40,841 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2023-11-29 05:56:40,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 05:56:40,842 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:56:40,842 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:56:40,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 05:56:40,842 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:56:40,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:40,843 INFO L85 PathProgramCache]: Analyzing trace with hash 766167218, now seen corresponding path program 1 times [2023-11-29 05:56:40,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:56:40,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756227301] [2023-11-29 05:56:40,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:40,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:56:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:41,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:56:41,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:41,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:56:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:41,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 05:56:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:41,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:56:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:41,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:56:41,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:41,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756227301] [2023-11-29 05:56:41,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756227301] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:56:41,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319648529] [2023-11-29 05:56:41,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:41,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:56:41,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:56:41,181 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:56:41,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:56:41,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:41,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 05:56:41,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:56:41,425 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 10 treesize of output 9 [2023-11-29 05:56:42,095 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-29 05:56:42,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2023-11-29 05:56:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:56:42,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:56:43,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319648529] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:56:43,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:56:43,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2023-11-29 05:56:43,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884354538] [2023-11-29 05:56:43,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:56:43,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 05:56:43,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:43,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 05:56:43,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2023-11-29 05:56:43,033 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 21 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-29 05:56:44,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:56:44,275 INFO L93 Difference]: Finished difference Result 151 states and 166 transitions. [2023-11-29 05:56:44,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:56:44,276 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 29 [2023-11-29 05:56:44,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:56:44,277 INFO L225 Difference]: With dead ends: 151 [2023-11-29 05:56:44,277 INFO L226 Difference]: Without dead ends: 151 [2023-11-29 05:56:44,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 05:56:44,278 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 511 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 05:56:44,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 791 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 05:56:44,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-29 05:56:44,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 95. [2023-11-29 05:56:44,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 61 states have (on average 1.5081967213114753) internal successors, (92), 84 states have internal predecessors, (92), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 05:56:44,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2023-11-29 05:56:44,287 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 29 [2023-11-29 05:56:44,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:56:44,288 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2023-11-29 05:56:44,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-29 05:56:44,288 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2023-11-29 05:56:44,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 05:56:44,289 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:56:44,289 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:56:44,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 05:56:44,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 05:56:44,489 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:56:44,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:44,490 INFO L85 PathProgramCache]: Analyzing trace with hash -2018620041, now seen corresponding path program 1 times [2023-11-29 05:56:44,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:56:44,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973590801] [2023-11-29 05:56:44,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:44,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:56:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:44,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:56:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:44,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:56:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:44,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 05:56:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:44,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:56:44,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:56:44,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:44,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973590801] [2023-11-29 05:56:44,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973590801] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:56:44,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653865662] [2023-11-29 05:56:44,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:44,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:56:44,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:56:44,810 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:56:44,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:56:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:44,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 05:56:44,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:56:44,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-11-29 05:56:45,018 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-29 05:56:45,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-11-29 05:56:45,454 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:56:45,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:56:45,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653865662] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:56:45,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:56:45,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2023-11-29 05:56:45,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620844812] [2023-11-29 05:56:45,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:56:45,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:56:45,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:45,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:56:45,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:56:45,737 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-29 05:56:46,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:56:46,639 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2023-11-29 05:56:46,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:56:46,639 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 30 [2023-11-29 05:56:46,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:56:46,640 INFO L225 Difference]: With dead ends: 93 [2023-11-29 05:56:46,640 INFO L226 Difference]: Without dead ends: 93 [2023-11-29 05:56:46,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2023-11-29 05:56:46,641 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 390 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:56:46,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 148 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 05:56:46,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-29 05:56:46,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-11-29 05:56:46,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 61 states have (on average 1.4754098360655739) internal successors, (90), 82 states have internal predecessors, (90), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 05:56:46,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2023-11-29 05:56:46,646 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 30 [2023-11-29 05:56:46,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:56:46,646 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2023-11-29 05:56:46,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-29 05:56:46,646 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2023-11-29 05:56:46,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 05:56:46,647 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:56:46,647 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:56:46,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 05:56:46,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 05:56:46,856 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:56:46,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:46,856 INFO L85 PathProgramCache]: Analyzing trace with hash 2085045738, now seen corresponding path program 1 times [2023-11-29 05:56:46,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:56:46,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211083962] [2023-11-29 05:56:46,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:46,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:56:46,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:47,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:56:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:47,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:56:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:47,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 05:56:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:47,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 05:56:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:56:47,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:47,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211083962] [2023-11-29 05:56:47,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211083962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:56:47,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094924222] [2023-11-29 05:56:47,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:47,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:56:47,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:56:47,120 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:56:47,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:56:47,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:47,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 05:56:47,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:56:47,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:56:47,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:56:47,472 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 28 treesize of output 24 [2023-11-29 05:56:47,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:56:47,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094924222] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:56:47,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:56:47,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2023-11-29 05:56:47,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591833533] [2023-11-29 05:56:47,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:56:47,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 05:56:47,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:47,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 05:56:47,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2023-11-29 05:56:47,552 INFO L87 Difference]: Start difference. First operand 93 states and 104 transitions. Second operand has 26 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-29 05:56:47,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:56:47,998 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2023-11-29 05:56:47,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:56:47,998 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 31 [2023-11-29 05:56:47,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:56:47,999 INFO L225 Difference]: With dead ends: 92 [2023-11-29 05:56:47,999 INFO L226 Difference]: Without dead ends: 92 [2023-11-29 05:56:48,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=931, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 05:56:48,000 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 384 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:56:48,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 309 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:56:48,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-29 05:56:48,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2023-11-29 05:56:48,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 61 states have (on average 1.459016393442623) internal successors, (89), 81 states have internal predecessors, (89), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 05:56:48,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2023-11-29 05:56:48,004 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 31 [2023-11-29 05:56:48,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:56:48,004 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2023-11-29 05:56:48,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-29 05:56:48,004 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2023-11-29 05:56:48,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 05:56:48,005 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:56:48,005 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:56:48,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:56:48,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 05:56:48,205 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:56:48,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:48,206 INFO L85 PathProgramCache]: Analyzing trace with hash 2085042989, now seen corresponding path program 1 times [2023-11-29 05:56:48,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:56:48,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598123554] [2023-11-29 05:56:48,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:48,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:56:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:48,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:56:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:48,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:56:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:48,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 05:56:48,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:48,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 05:56:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:56:48,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:48,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598123554] [2023-11-29 05:56:48,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598123554] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:56:48,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:56:48,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:56:48,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476370241] [2023-11-29 05:56:48,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:56:48,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:56:48,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:48,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:56:48,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:56:48,266 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:56:48,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:56:48,351 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2023-11-29 05:56:48,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:56:48,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2023-11-29 05:56:48,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:56:48,353 INFO L225 Difference]: With dead ends: 89 [2023-11-29 05:56:48,353 INFO L226 Difference]: Without dead ends: 89 [2023-11-29 05:56:48,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:56:48,354 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 60 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:56:48,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 141 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:56:48,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-29 05:56:48,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-11-29 05:56:48,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 61 states have (on average 1.4098360655737705) internal successors, (86), 78 states have internal predecessors, (86), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 05:56:48,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2023-11-29 05:56:48,358 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 31 [2023-11-29 05:56:48,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:56:48,358 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2023-11-29 05:56:48,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:56:48,358 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2023-11-29 05:56:48,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 05:56:48,359 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:56:48,359 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:56:48,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 05:56:48,360 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:56:48,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:48,360 INFO L85 PathProgramCache]: Analyzing trace with hash 2085042990, now seen corresponding path program 1 times [2023-11-29 05:56:48,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:56:48,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951324778] [2023-11-29 05:56:48,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:48,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:56:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:48,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:56:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:48,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:56:48,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:48,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 05:56:48,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:48,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 05:56:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:48,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:56:48,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:48,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951324778] [2023-11-29 05:56:48,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951324778] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:56:48,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908186376] [2023-11-29 05:56:48,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:48,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:56:48,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:56:48,477 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:56:48,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:56:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:48,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 05:56:48,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:56:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:56:48,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:56:48,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:56:48,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908186376] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:56:48,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:56:48,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 11 [2023-11-29 05:56:48,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360436369] [2023-11-29 05:56:48,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:56:48,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:56:48,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:48,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:56:48,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:56:48,656 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:56:48,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:56:48,785 INFO L93 Difference]: Finished difference Result 131 states and 144 transitions. [2023-11-29 05:56:48,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:56:48,785 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2023-11-29 05:56:48,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:56:48,786 INFO L225 Difference]: With dead ends: 131 [2023-11-29 05:56:48,787 INFO L226 Difference]: Without dead ends: 131 [2023-11-29 05:56:48,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-29 05:56:48,787 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 94 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:56:48,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 336 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:56:48,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-29 05:56:48,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 91. [2023-11-29 05:56:48,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 80 states have internal predecessors, (88), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 05:56:48,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2023-11-29 05:56:48,792 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 31 [2023-11-29 05:56:48,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:56:48,792 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2023-11-29 05:56:48,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:56:48,793 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2023-11-29 05:56:48,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 05:56:48,793 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:56:48,793 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:56:48,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 05:56:48,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 05:56:48,996 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:56:48,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:48,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1431517054, now seen corresponding path program 2 times [2023-11-29 05:56:48,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:56:48,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423234505] [2023-11-29 05:56:48,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:48,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:56:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:49,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:56:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:49,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:56:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:49,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 05:56:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:49,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:56:49,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:56:49,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:49,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423234505] [2023-11-29 05:56:49,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423234505] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:56:49,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605241046] [2023-11-29 05:56:49,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:56:49,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:56:49,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:56:49,275 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:56:49,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:56:49,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:56:49,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:56:49,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 05:56:49,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:56:49,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-11-29 05:56:49,605 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-29 05:56:49,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2023-11-29 05:56:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:56:50,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:56:50,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605241046] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:56:50,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:56:50,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2023-11-29 05:56:50,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873320280] [2023-11-29 05:56:50,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:56:50,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 05:56:50,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:50,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 05:56:50,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2023-11-29 05:56:50,274 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 7 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-29 05:56:51,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:56:51,771 INFO L93 Difference]: Finished difference Result 198 states and 220 transitions. [2023-11-29 05:56:51,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 05:56:51,771 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 7 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) Word has length 32 [2023-11-29 05:56:51,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:56:51,773 INFO L225 Difference]: With dead ends: 198 [2023-11-29 05:56:51,773 INFO L226 Difference]: Without dead ends: 198 [2023-11-29 05:56:51,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=406, Invalid=1850, Unknown=0, NotChecked=0, Total=2256 [2023-11-29 05:56:51,774 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 778 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 05:56:51,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [778 Valid, 538 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 05:56:51,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-11-29 05:56:51,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 109. [2023-11-29 05:56:51,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 78 states have (on average 1.3461538461538463) internal successors, (105), 95 states have internal predecessors, (105), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 05:56:51,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2023-11-29 05:56:51,780 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 32 [2023-11-29 05:56:51,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:56:51,780 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2023-11-29 05:56:51,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 7 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-29 05:56:51,781 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2023-11-29 05:56:51,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 05:56:51,782 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:56:51,782 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:56:51,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:56:51,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 05:56:51,987 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:56:51,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:51,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1784364507, now seen corresponding path program 1 times [2023-11-29 05:56:51,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:56:51,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754531501] [2023-11-29 05:56:51,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:51,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:56:51,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:52,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:56:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:52,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:56:52,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:52,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 05:56:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:52,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 05:56:52,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:52,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:56:52,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:52,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754531501] [2023-11-29 05:56:52,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754531501] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:56:52,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718956880] [2023-11-29 05:56:52,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:52,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:56:52,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:56:52,094 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:56:52,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:56:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:52,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:56:52,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:56:52,218 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:56:52,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:56:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:56:52,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718956880] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:56:52,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:56:52,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 11 [2023-11-29 05:56:52,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204193915] [2023-11-29 05:56:52,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:56:52,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:56:52,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:52,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:56:52,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:56:52,265 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:56:52,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:56:52,444 INFO L93 Difference]: Finished difference Result 142 states and 161 transitions. [2023-11-29 05:56:52,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:56:52,445 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2023-11-29 05:56:52,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:56:52,446 INFO L225 Difference]: With dead ends: 142 [2023-11-29 05:56:52,446 INFO L226 Difference]: Without dead ends: 142 [2023-11-29 05:56:52,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:56:52,448 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 76 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:56:52,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 584 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:56:52,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-29 05:56:52,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 114. [2023-11-29 05:56:52,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 83 states have (on average 1.3373493975903614) internal successors, (111), 100 states have internal predecessors, (111), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 05:56:52,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2023-11-29 05:56:52,453 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 34 [2023-11-29 05:56:52,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:56:52,454 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2023-11-29 05:56:52,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:56:52,454 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2023-11-29 05:56:52,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 05:56:52,455 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:56:52,455 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:56:52,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:56:52,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 05:56:52,661 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:56:52,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:52,661 INFO L85 PathProgramCache]: Analyzing trace with hash -519234565, now seen corresponding path program 1 times [2023-11-29 05:56:52,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:56:52,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833233023] [2023-11-29 05:56:52,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:52,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:56:52,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:52,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:56:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:52,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:56:52,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:52,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 05:56:52,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:52,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 05:56:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:52,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:56:52,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:52,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833233023] [2023-11-29 05:56:52,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833233023] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:56:52,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:56:52,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:56:52,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88723377] [2023-11-29 05:56:52,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:56:52,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:56:52,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:52,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:56:52,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:56:52,722 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:56:52,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:56:52,802 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2023-11-29 05:56:52,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:56:52,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2023-11-29 05:56:52,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:56:52,804 INFO L225 Difference]: With dead ends: 113 [2023-11-29 05:56:52,804 INFO L226 Difference]: Without dead ends: 113 [2023-11-29 05:56:52,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:56:52,804 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 55 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:56:52,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 144 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:56:52,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-29 05:56:52,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-11-29 05:56:52,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 83 states have (on average 1.3253012048192772) internal successors, (110), 99 states have internal predecessors, (110), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 05:56:52,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 130 transitions. [2023-11-29 05:56:52,809 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 130 transitions. Word has length 35 [2023-11-29 05:56:52,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:56:52,810 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 130 transitions. [2023-11-29 05:56:52,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:56:52,810 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 130 transitions. [2023-11-29 05:56:52,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 05:56:52,811 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:56:52,811 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:56:52,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-29 05:56:52,811 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:56:52,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:52,811 INFO L85 PathProgramCache]: Analyzing trace with hash -519234564, now seen corresponding path program 1 times [2023-11-29 05:56:52,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:56:52,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159892347] [2023-11-29 05:56:52,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:52,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:56:52,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:53,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:56:53,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:53,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:56:53,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:53,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 05:56:53,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:53,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 05:56:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:53,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:56:53,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:53,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159892347] [2023-11-29 05:56:53,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159892347] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:56:53,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534448608] [2023-11-29 05:56:53,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:53,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:56:53,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:56:53,081 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:56:53,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:56:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:53,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 05:56:53,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:56:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:56:53,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:56:53,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-11-29 05:56:53,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:56:53,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534448608] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:56:53,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:56:53,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 17 [2023-11-29 05:56:53,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69349022] [2023-11-29 05:56:53,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:56:53,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 05:56:53,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:53,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 05:56:53,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:56:53,382 INFO L87 Difference]: Start difference. First operand 113 states and 130 transitions. Second operand has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-29 05:56:53,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:56:53,692 INFO L93 Difference]: Finished difference Result 123 states and 141 transitions. [2023-11-29 05:56:53,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:56:53,693 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 35 [2023-11-29 05:56:53,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:56:53,694 INFO L225 Difference]: With dead ends: 123 [2023-11-29 05:56:53,694 INFO L226 Difference]: Without dead ends: 123 [2023-11-29 05:56:53,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-29 05:56:53,695 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 379 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:56:53,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 168 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:56:53,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-11-29 05:56:53,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 115. [2023-11-29 05:56:53,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 85 states have (on average 1.3294117647058823) internal successors, (113), 101 states have internal predecessors, (113), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 05:56:53,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 133 transitions. [2023-11-29 05:56:53,699 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 133 transitions. Word has length 35 [2023-11-29 05:56:53,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:56:53,700 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 133 transitions. [2023-11-29 05:56:53,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-29 05:56:53,700 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 133 transitions. [2023-11-29 05:56:53,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 05:56:53,701 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:56:53,701 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:56:53,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 05:56:53,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 05:56:53,901 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:56:53,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:53,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1592778511, now seen corresponding path program 1 times [2023-11-29 05:56:53,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:56:53,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190773785] [2023-11-29 05:56:53,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:53,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:56:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:54,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:56:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:54,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:56:54,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:54,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 05:56:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:54,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:56:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:54,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:56:54,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:54,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190773785] [2023-11-29 05:56:54,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190773785] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:56:54,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349199618] [2023-11-29 05:56:54,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:54,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:56:54,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:56:54,109 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:56:54,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:56:54,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:54,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 05:56:54,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:56:54,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:56:54,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:56:54,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-11-29 05:56:54,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:56:54,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349199618] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:56:54,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:56:54,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2023-11-29 05:56:54,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529984512] [2023-11-29 05:56:54,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:56:54,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 05:56:54,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:54,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 05:56:54,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2023-11-29 05:56:54,449 INFO L87 Difference]: Start difference. First operand 115 states and 133 transitions. Second operand has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-29 05:56:54,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:56:54,908 INFO L93 Difference]: Finished difference Result 174 states and 201 transitions. [2023-11-29 05:56:54,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 05:56:54,909 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 35 [2023-11-29 05:56:54,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:56:54,911 INFO L225 Difference]: With dead ends: 174 [2023-11-29 05:56:54,911 INFO L226 Difference]: Without dead ends: 174 [2023-11-29 05:56:54,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 05:56:54,912 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 765 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:56:54,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [765 Valid, 235 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:56:54,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-11-29 05:56:54,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 126. [2023-11-29 05:56:54,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 96 states have (on average 1.375) internal successors, (132), 112 states have internal predecessors, (132), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 05:56:54,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 152 transitions. [2023-11-29 05:56:54,919 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 152 transitions. Word has length 35 [2023-11-29 05:56:54,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:56:54,919 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 152 transitions. [2023-11-29 05:56:54,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-29 05:56:54,919 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 152 transitions. [2023-11-29 05:56:54,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-29 05:56:54,920 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:56:54,920 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:56:54,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 05:56:55,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:56:55,121 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:56:55,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:55,121 INFO L85 PathProgramCache]: Analyzing trace with hash 2131493592, now seen corresponding path program 1 times [2023-11-29 05:56:55,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:56:55,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722597606] [2023-11-29 05:56:55,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:55,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:56:55,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:55,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:56:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:55,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:56:55,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:55,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 05:56:55,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:55,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:56:55,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:56:55,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:55,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722597606] [2023-11-29 05:56:55,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722597606] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:56:55,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469915690] [2023-11-29 05:56:55,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:55,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:56:55,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:56:55,324 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:56:55,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 05:56:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:55,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 05:56:55,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:56:55,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:56:55,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:56:55,633 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 [2023-11-29 05:56:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:56:55,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469915690] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:56:55,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:56:55,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-11-29 05:56:55,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278307413] [2023-11-29 05:56:55,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:56:55,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 05:56:55,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:55,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 05:56:55,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2023-11-29 05:56:55,717 INFO L87 Difference]: Start difference. First operand 126 states and 152 transitions. Second operand has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-29 05:56:56,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:56:56,074 INFO L93 Difference]: Finished difference Result 156 states and 180 transitions. [2023-11-29 05:56:56,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:56:56,075 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 36 [2023-11-29 05:56:56,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:56:56,076 INFO L225 Difference]: With dead ends: 156 [2023-11-29 05:56:56,076 INFO L226 Difference]: Without dead ends: 156 [2023-11-29 05:56:56,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=982, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 05:56:56,077 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 402 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:56:56,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 280 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:56:56,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-11-29 05:56:56,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 126. [2023-11-29 05:56:56,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 97 states have (on average 1.3505154639175259) internal successors, (131), 112 states have internal predecessors, (131), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 05:56:56,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 151 transitions. [2023-11-29 05:56:56,083 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 151 transitions. Word has length 36 [2023-11-29 05:56:56,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:56:56,083 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 151 transitions. [2023-11-29 05:56:56,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-29 05:56:56,083 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 151 transitions. [2023-11-29 05:56:56,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-29 05:56:56,084 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:56:56,084 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:56:56,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 05:56:56,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:56:56,285 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:56:56,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:56,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1090847521, now seen corresponding path program 3 times [2023-11-29 05:56:56,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:56:56,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284197981] [2023-11-29 05:56:56,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:56:56,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:56:56,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:56,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:56:56,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:56,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 05:56:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:56,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 05:56:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:56,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 05:56:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:56,626 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:56:56,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:56,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284197981] [2023-11-29 05:56:56,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284197981] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:56:56,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759135164] [2023-11-29 05:56:56,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:56:56,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:56:56,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:56:56,628 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:56:56,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 05:56:56,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 05:56:56,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:56:56,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 05:56:56,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:56:56,787 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 [2023-11-29 05:56:56,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 05:56:56,934 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 05:56:56,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 05:56:56,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-11-29 05:56:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 05:56:59,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:56:59,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759135164] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:56:59,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:56:59,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2023-11-29 05:56:59,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360566557] [2023-11-29 05:56:59,928 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:56:59,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 05:56:59,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:59,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 05:56:59,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=722, Unknown=1, NotChecked=0, Total=812 [2023-11-29 05:56:59,929 INFO L87 Difference]: Start difference. First operand 126 states and 151 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-29 05:57:03,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:57:03,830 INFO L93 Difference]: Finished difference Result 280 states and 329 transitions. [2023-11-29 05:57:03,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 05:57:03,830 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 36 [2023-11-29 05:57:03,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:57:03,832 INFO L225 Difference]: With dead ends: 280 [2023-11-29 05:57:03,832 INFO L226 Difference]: Without dead ends: 280 [2023-11-29 05:57:03,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=558, Invalid=2411, Unknown=1, NotChecked=0, Total=2970 [2023-11-29 05:57:03,834 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 1203 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 1400 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1203 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 05:57:03,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1203 Valid, 623 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1400 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 05:57:03,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2023-11-29 05:57:03,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 125. [2023-11-29 05:57:03,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 95 states have (on average 1.3368421052631578) internal successors, (127), 109 states have internal predecessors, (127), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 05:57:03,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 147 transitions. [2023-11-29 05:57:03,840 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 147 transitions. Word has length 36 [2023-11-29 05:57:03,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:57:03,840 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 147 transitions. [2023-11-29 05:57:03,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-29 05:57:03,841 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 147 transitions. [2023-11-29 05:57:03,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 05:57:03,841 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:57:03,841 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:57:03,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 05:57:04,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 05:57:04,042 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:57:04,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:57:04,042 INFO L85 PathProgramCache]: Analyzing trace with hash -768242763, now seen corresponding path program 1 times [2023-11-29 05:57:04,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:57:04,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992350294] [2023-11-29 05:57:04,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:57:04,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:57:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:04,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:57:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:04,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:57:04,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:04,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 05:57:04,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:04,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 05:57:04,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:57:04,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:57:04,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992350294] [2023-11-29 05:57:04,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992350294] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:57:04,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836763387] [2023-11-29 05:57:04,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:57:04,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:57:04,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:57:04,148 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:57:04,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 05:57:04,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:04,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:57:04,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:57:04,284 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:57:04,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:57:04,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:57:04,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836763387] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:57:04,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:57:04,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 11 [2023-11-29 05:57:04,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660668480] [2023-11-29 05:57:04,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:57:04,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:57:04,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:57:04,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:57:04,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:57:04,331 INFO L87 Difference]: Start difference. First operand 125 states and 147 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:57:04,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:57:04,473 INFO L93 Difference]: Finished difference Result 132 states and 153 transitions. [2023-11-29 05:57:04,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:57:04,474 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2023-11-29 05:57:04,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:57:04,475 INFO L225 Difference]: With dead ends: 132 [2023-11-29 05:57:04,475 INFO L226 Difference]: Without dead ends: 132 [2023-11-29 05:57:04,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:57:04,476 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 145 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:57:04,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 285 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:57:04,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-29 05:57:04,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2023-11-29 05:57:04,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 95 states have (on average 1.3263157894736841) internal successors, (126), 109 states have internal predecessors, (126), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 05:57:04,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2023-11-29 05:57:04,481 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 37 [2023-11-29 05:57:04,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:57:04,481 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2023-11-29 05:57:04,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:57:04,482 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2023-11-29 05:57:04,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 05:57:04,482 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:57:04,482 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:57:04,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 05:57:04,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 05:57:04,683 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:57:04,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:57:04,683 INFO L85 PathProgramCache]: Analyzing trace with hash -768142498, now seen corresponding path program 1 times [2023-11-29 05:57:04,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:57:04,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56455730] [2023-11-29 05:57:04,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:57:04,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:57:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:05,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:57:05,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:05,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:57:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:05,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 05:57:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:05,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 05:57:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:57:05,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:57:05,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56455730] [2023-11-29 05:57:05,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56455730] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:57:05,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387539217] [2023-11-29 05:57:05,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:57:05,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:57:05,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:57:05,043 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:57:05,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 05:57:05,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:57:05,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 05:57:05,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:57:05,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 05:57:05,242 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 7 treesize of output 6 [2023-11-29 05:57:05,316 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-29 05:57:05,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-11-29 05:57:05,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-11-29 05:57:05,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-11-29 05:57:05,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2023-11-29 05:57:05,521 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 39 treesize of output 33 [2023-11-29 05:57:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:57:05,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:57:53,640 WARN L854 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_downsweep_~n#1| Int) (|ULTIMATE.start_downsweep_~a#1.offset| Int) (|ULTIMATE.start_check_~a#1.offset| Int) (|ULTIMATE.start_check_~i~0#1| Int)) (= (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_downsweep_~a#1.base| (store (select |c_#memory_int#1| |c_ULTIMATE.start_downsweep_~a#1.base|) (+ |ULTIMATE.start_downsweep_~a#1.offset| (- 4) (* |ULTIMATE.start_downsweep_~n#1| 4)) 0)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) 0)) is different from false [2023-11-29 05:58:14,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387539217] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:58:14,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:58:14,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 28 [2023-11-29 05:58:14,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933437242] [2023-11-29 05:58:14,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:58:14,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 05:58:14,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:58:14,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 05:58:14,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=880, Unknown=25, NotChecked=60, Total=1056 [2023-11-29 05:58:14,117 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand has 28 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 25 states have internal predecessors, (49), 6 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-11-29 05:58:15,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:58:15,302 INFO L93 Difference]: Finished difference Result 213 states and 240 transitions. [2023-11-29 05:58:15,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 05:58:15,303 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 25 states have internal predecessors, (49), 6 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 37 [2023-11-29 05:58:15,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:58:15,304 INFO L225 Difference]: With dead ends: 213 [2023-11-29 05:58:15,304 INFO L226 Difference]: Without dead ends: 213 [2023-11-29 05:58:15,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 69.5s TimeCoverageRelationStatistics Valid=507, Invalid=2893, Unknown=26, NotChecked=114, Total=3540 [2023-11-29 05:58:15,306 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 860 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:58:15,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [861 Valid, 563 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 05:58:15,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-29 05:58:15,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 140. [2023-11-29 05:58:15,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.3363636363636364) internal successors, (147), 124 states have internal predecessors, (147), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 05:58:15,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 167 transitions. [2023-11-29 05:58:15,312 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 167 transitions. Word has length 37 [2023-11-29 05:58:15,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:58:15,312 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 167 transitions. [2023-11-29 05:58:15,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 25 states have internal predecessors, (49), 6 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-11-29 05:58:15,313 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 167 transitions. [2023-11-29 05:58:15,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 05:58:15,313 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:58:15,313 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:58:15,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 05:58:15,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 05:58:15,514 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:58:15,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:15,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1957392478, now seen corresponding path program 1 times [2023-11-29 05:58:15,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:58:15,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235374193] [2023-11-29 05:58:15,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:15,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:58:15,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:15,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:58:15,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:15,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:58:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:15,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 05:58:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:15,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 05:58:15,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:58:15,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:58:15,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235374193] [2023-11-29 05:58:15,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235374193] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:58:15,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:58:15,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:58:15,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380283428] [2023-11-29 05:58:15,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:58:15,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:58:15,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:58:15,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:58:15,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:58:15,578 INFO L87 Difference]: Start difference. First operand 140 states and 167 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:58:15,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:58:15,665 INFO L93 Difference]: Finished difference Result 139 states and 166 transitions. [2023-11-29 05:58:15,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:58:15,665 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2023-11-29 05:58:15,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:58:15,667 INFO L225 Difference]: With dead ends: 139 [2023-11-29 05:58:15,667 INFO L226 Difference]: Without dead ends: 139 [2023-11-29 05:58:15,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:58:15,667 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 49 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:58:15,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 147 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:58:15,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-11-29 05:58:15,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2023-11-29 05:58:15,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 110 states have (on average 1.3272727272727274) internal successors, (146), 123 states have internal predecessors, (146), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 05:58:15,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 166 transitions. [2023-11-29 05:58:15,673 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 166 transitions. Word has length 38 [2023-11-29 05:58:15,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:58:15,674 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 166 transitions. [2023-11-29 05:58:15,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:58:15,674 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 166 transitions. [2023-11-29 05:58:15,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 05:58:15,675 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:58:15,675 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:58:15,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-29 05:58:15,675 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:58:15,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:15,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1957392479, now seen corresponding path program 1 times [2023-11-29 05:58:15,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:58:15,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750161242] [2023-11-29 05:58:15,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:15,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:58:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:15,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:58:15,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:15,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:58:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:15,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 05:58:15,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:15,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 05:58:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:15,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:58:15,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:58:15,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750161242] [2023-11-29 05:58:15,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750161242] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:58:15,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004462814] [2023-11-29 05:58:15,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:15,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:58:15,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:58:15,822 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:58:15,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 05:58:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:15,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 05:58:15,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:58:16,034 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:58:16,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:58:16,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-11-29 05:58:16,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:58:16,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004462814] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:58:16,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:58:16,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2023-11-29 05:58:16,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524803985] [2023-11-29 05:58:16,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:58:16,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:58:16,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:58:16,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:58:16,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:58:16,135 INFO L87 Difference]: Start difference. First operand 139 states and 166 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-29 05:58:16,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:58:16,320 INFO L93 Difference]: Finished difference Result 144 states and 171 transitions. [2023-11-29 05:58:16,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:58:16,321 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2023-11-29 05:58:16,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:58:16,322 INFO L225 Difference]: With dead ends: 144 [2023-11-29 05:58:16,322 INFO L226 Difference]: Without dead ends: 144 [2023-11-29 05:58:16,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:58:16,323 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 244 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:58:16,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 159 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:58:16,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-11-29 05:58:16,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2023-11-29 05:58:16,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 113 states have (on average 1.3274336283185841) internal successors, (150), 126 states have internal predecessors, (150), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 05:58:16,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 170 transitions. [2023-11-29 05:58:16,329 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 170 transitions. Word has length 38 [2023-11-29 05:58:16,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:58:16,329 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 170 transitions. [2023-11-29 05:58:16,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-29 05:58:16,330 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 170 transitions. [2023-11-29 05:58:16,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 05:58:16,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:58:16,331 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:58:16,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 05:58:16,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:58:16,536 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:58:16,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:16,536 INFO L85 PathProgramCache]: Analyzing trace with hash -248380838, now seen corresponding path program 1 times [2023-11-29 05:58:16,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:58:16,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401158500] [2023-11-29 05:58:16,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:16,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:58:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:16,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:58:16,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:16,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:58:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:16,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 05:58:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:16,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:58:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:16,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:58:16,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:58:16,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401158500] [2023-11-29 05:58:16,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401158500] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:58:16,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883275616] [2023-11-29 05:58:16,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:16,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:58:16,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:58:16,681 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:58:16,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 05:58:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:16,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 05:58:16,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:58:16,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:58:16,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:58:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:58:16,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883275616] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:58:16,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:58:16,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 11 [2023-11-29 05:58:16,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394151599] [2023-11-29 05:58:16,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:58:16,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:58:16,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:58:16,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:58:16,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:58:16,873 INFO L87 Difference]: Start difference. First operand 142 states and 170 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:58:17,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:58:17,061 INFO L93 Difference]: Finished difference Result 171 states and 196 transitions. [2023-11-29 05:58:17,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:58:17,061 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2023-11-29 05:58:17,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:58:17,062 INFO L225 Difference]: With dead ends: 171 [2023-11-29 05:58:17,062 INFO L226 Difference]: Without dead ends: 171 [2023-11-29 05:58:17,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:58:17,063 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 205 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:58:17,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 449 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:58:17,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-11-29 05:58:17,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 142. [2023-11-29 05:58:17,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 113 states have (on average 1.3185840707964602) internal successors, (149), 126 states have internal predecessors, (149), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 05:58:17,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 169 transitions. [2023-11-29 05:58:17,069 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 169 transitions. Word has length 38 [2023-11-29 05:58:17,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:58:17,069 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 169 transitions. [2023-11-29 05:58:17,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:58:17,069 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 169 transitions. [2023-11-29 05:58:17,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 05:58:17,070 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:58:17,070 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:58:17,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 05:58:17,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 05:58:17,271 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:58:17,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:17,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1811508886, now seen corresponding path program 1 times [2023-11-29 05:58:17,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:58:17,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414252197] [2023-11-29 05:58:17,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:17,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:58:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:17,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:58:17,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:17,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:58:17,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:17,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 05:58:17,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:17,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:58:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:58:17,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:58:17,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414252197] [2023-11-29 05:58:17,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414252197] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:58:17,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941070123] [2023-11-29 05:58:17,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:17,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:58:17,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:58:17,408 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:58:17,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 05:58:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:17,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:58:17,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:58:17,531 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:58:17,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:58:17,611 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:58:17,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941070123] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:58:17,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:58:17,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2023-11-29 05:58:17,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064250284] [2023-11-29 05:58:17,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:58:17,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 05:58:17,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:58:17,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 05:58:17,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-11-29 05:58:17,613 INFO L87 Difference]: Start difference. First operand 142 states and 169 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:58:17,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:58:17,916 INFO L93 Difference]: Finished difference Result 159 states and 176 transitions. [2023-11-29 05:58:17,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:58:17,916 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2023-11-29 05:58:17,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:58:17,917 INFO L225 Difference]: With dead ends: 159 [2023-11-29 05:58:17,917 INFO L226 Difference]: Without dead ends: 159 [2023-11-29 05:58:17,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:58:17,918 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 208 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:58:17,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 693 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:58:17,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-29 05:58:17,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 132. [2023-11-29 05:58:17,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 103 states have (on average 1.2718446601941749) internal successors, (131), 116 states have internal predecessors, (131), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 05:58:17,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 151 transitions. [2023-11-29 05:58:17,922 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 151 transitions. Word has length 39 [2023-11-29 05:58:17,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:58:17,922 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 151 transitions. [2023-11-29 05:58:17,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:58:17,922 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 151 transitions. [2023-11-29 05:58:17,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 05:58:17,922 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:58:17,923 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:58:17,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-29 05:58:18,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 05:58:18,123 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:58:18,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:18,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1765728802, now seen corresponding path program 1 times [2023-11-29 05:58:18,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:58:18,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153285605] [2023-11-29 05:58:18,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:18,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:58:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:18,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:58:18,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:18,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:58:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:18,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 05:58:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:18,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:58:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:58:18,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:58:18,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153285605] [2023-11-29 05:58:18,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153285605] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:58:18,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702875007] [2023-11-29 05:58:18,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:18,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:58:18,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:58:18,276 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:58:18,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 05:58:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:18,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:58:18,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:58:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:58:18,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:58:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:58:18,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702875007] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:58:18,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:58:18,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 18 [2023-11-29 05:58:18,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004575585] [2023-11-29 05:58:18,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:58:18,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 05:58:18,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:58:18,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 05:58:18,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:58:18,515 INFO L87 Difference]: Start difference. First operand 132 states and 151 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:58:18,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:58:18,776 INFO L93 Difference]: Finished difference Result 222 states and 247 transitions. [2023-11-29 05:58:18,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:58:18,777 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2023-11-29 05:58:18,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:58:18,778 INFO L225 Difference]: With dead ends: 222 [2023-11-29 05:58:18,778 INFO L226 Difference]: Without dead ends: 222 [2023-11-29 05:58:18,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:58:18,779 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 201 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:58:18,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 513 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:58:18,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2023-11-29 05:58:18,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 153. [2023-11-29 05:58:18,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 124 states have (on average 1.2661290322580645) internal successors, (157), 137 states have internal predecessors, (157), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 05:58:18,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 177 transitions. [2023-11-29 05:58:18,785 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 177 transitions. Word has length 39 [2023-11-29 05:58:18,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:58:18,785 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 177 transitions. [2023-11-29 05:58:18,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:58:18,785 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 177 transitions. [2023-11-29 05:58:18,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 05:58:18,786 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:58:18,786 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:58:18,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 05:58:18,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 05:58:18,987 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:58:18,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:18,987 INFO L85 PathProgramCache]: Analyzing trace with hash -141446952, now seen corresponding path program 1 times [2023-11-29 05:58:18,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:58:18,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780099747] [2023-11-29 05:58:18,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:18,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:58:18,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:19,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:58:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:19,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:58:19,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:19,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 05:58:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:19,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 05:58:19,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:19,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:58:19,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:58:19,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780099747] [2023-11-29 05:58:19,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780099747] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:58:19,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861056783] [2023-11-29 05:58:19,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:19,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:58:19,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:58:19,096 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:58:19,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 05:58:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:19,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:58:19,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:58:19,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:58:19,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:58:19,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:58:19,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861056783] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:58:19,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:58:19,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 13 [2023-11-29 05:58:19,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816212605] [2023-11-29 05:58:19,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:58:19,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 05:58:19,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:58:19,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 05:58:19,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-11-29 05:58:19,277 INFO L87 Difference]: Start difference. First operand 153 states and 177 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:58:19,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:58:19,438 INFO L93 Difference]: Finished difference Result 168 states and 191 transitions. [2023-11-29 05:58:19,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:58:19,438 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2023-11-29 05:58:19,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:58:19,439 INFO L225 Difference]: With dead ends: 168 [2023-11-29 05:58:19,439 INFO L226 Difference]: Without dead ends: 168 [2023-11-29 05:58:19,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-11-29 05:58:19,440 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 54 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:58:19,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 434 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:58:19,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-29 05:58:19,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 156. [2023-11-29 05:58:19,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 127 states have (on average 1.2598425196850394) internal successors, (160), 140 states have internal predecessors, (160), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 05:58:19,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 180 transitions. [2023-11-29 05:58:19,446 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 180 transitions. Word has length 40 [2023-11-29 05:58:19,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:58:19,446 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 180 transitions. [2023-11-29 05:58:19,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:58:19,447 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 180 transitions. [2023-11-29 05:58:19,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-29 05:58:19,447 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:58:19,447 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:58:19,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 05:58:19,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 05:58:19,648 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:58:19,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:19,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1508399505, now seen corresponding path program 1 times [2023-11-29 05:58:19,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:58:19,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550865872] [2023-11-29 05:58:19,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:19,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:58:19,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:19,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:58:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:19,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:58:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:19,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 05:58:19,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:19,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 05:58:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 05:58:19,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:58:19,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550865872] [2023-11-29 05:58:19,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550865872] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:58:19,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:58:19,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:58:19,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965256203] [2023-11-29 05:58:19,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:58:19,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:58:19,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:58:19,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:58:19,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:58:19,702 INFO L87 Difference]: Start difference. First operand 156 states and 180 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 05:58:19,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:58:19,766 INFO L93 Difference]: Finished difference Result 155 states and 179 transitions. [2023-11-29 05:58:19,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:58:19,766 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 42 [2023-11-29 05:58:19,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:58:19,767 INFO L225 Difference]: With dead ends: 155 [2023-11-29 05:58:19,767 INFO L226 Difference]: Without dead ends: 155 [2023-11-29 05:58:19,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:58:19,768 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 93 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:58:19,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 100 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:58:19,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-29 05:58:19,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2023-11-29 05:58:19,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 127 states have (on average 1.2519685039370079) internal successors, (159), 139 states have internal predecessors, (159), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 05:58:19,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 179 transitions. [2023-11-29 05:58:19,773 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 179 transitions. Word has length 42 [2023-11-29 05:58:19,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:58:19,773 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 179 transitions. [2023-11-29 05:58:19,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 05:58:19,773 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 179 transitions. [2023-11-29 05:58:19,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 05:58:19,774 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:58:19,774 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:58:19,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-11-29 05:58:19,774 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:58:19,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:19,775 INFO L85 PathProgramCache]: Analyzing trace with hash -261238599, now seen corresponding path program 1 times [2023-11-29 05:58:19,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:58:19,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36341696] [2023-11-29 05:58:19,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:19,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:58:19,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:19,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:58:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:19,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:58:19,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:19,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 05:58:19,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:19,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:58:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:58:19,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:58:19,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36341696] [2023-11-29 05:58:19,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36341696] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:58:19,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136876293] [2023-11-29 05:58:19,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:19,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:58:19,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:58:19,905 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:58:19,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 05:58:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:19,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:58:19,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:58:20,057 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 05:58:20,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:58:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 05:58:20,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136876293] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:58:20,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:58:20,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 14 [2023-11-29 05:58:20,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519870774] [2023-11-29 05:58:20,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:58:20,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:58:20,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:58:20,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:58:20,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:58:20,117 INFO L87 Difference]: Start difference. First operand 155 states and 179 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:58:20,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:58:20,311 INFO L93 Difference]: Finished difference Result 200 states and 222 transitions. [2023-11-29 05:58:20,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:58:20,312 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2023-11-29 05:58:20,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:58:20,313 INFO L225 Difference]: With dead ends: 200 [2023-11-29 05:58:20,313 INFO L226 Difference]: Without dead ends: 200 [2023-11-29 05:58:20,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:58:20,314 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 156 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:58:20,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 387 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:58:20,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-11-29 05:58:20,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 146. [2023-11-29 05:58:20,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 118 states have (on average 1.2372881355932204) internal successors, (146), 130 states have internal predecessors, (146), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 05:58:20,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 166 transitions. [2023-11-29 05:58:20,320 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 166 transitions. Word has length 43 [2023-11-29 05:58:20,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:58:20,320 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 166 transitions. [2023-11-29 05:58:20,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:58:20,320 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 166 transitions. [2023-11-29 05:58:20,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 05:58:20,321 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:58:20,321 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:58:20,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 05:58:20,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-29 05:58:20,522 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:58:20,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:20,522 INFO L85 PathProgramCache]: Analyzing trace with hash -149702307, now seen corresponding path program 2 times [2023-11-29 05:58:20,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:58:20,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562312354] [2023-11-29 05:58:20,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:20,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:58:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:20,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:58:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:20,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 05:58:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:20,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 05:58:20,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:20,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 05:58:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 05:58:20,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:58:20,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562312354] [2023-11-29 05:58:20,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562312354] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:58:20,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799257038] [2023-11-29 05:58:20,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:58:20,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:58:20,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:58:20,713 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:58:20,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 05:58:20,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:58:20,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:58:20,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 05:58:20,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:58:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 05:58:20,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:58:21,097 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 [2023-11-29 05:58:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 05:58:21,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799257038] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:58:21,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:58:21,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 30 [2023-11-29 05:58:21,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086544844] [2023-11-29 05:58:21,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:58:21,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 05:58:21,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:58:21,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 05:58:21,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2023-11-29 05:58:21,233 INFO L87 Difference]: Start difference. First operand 146 states and 166 transitions. Second operand has 31 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 states have internal predecessors, (73), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-29 05:58:21,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:58:21,980 INFO L93 Difference]: Finished difference Result 210 states and 232 transitions. [2023-11-29 05:58:21,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:58:21,981 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 states have internal predecessors, (73), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 43 [2023-11-29 05:58:21,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:58:21,982 INFO L225 Difference]: With dead ends: 210 [2023-11-29 05:58:21,982 INFO L226 Difference]: Without dead ends: 210 [2023-11-29 05:58:21,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=1398, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 05:58:21,983 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 233 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:58:21,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 862 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 05:58:21,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-11-29 05:58:21,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 149. [2023-11-29 05:58:21,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 121 states have (on average 1.2396694214876034) internal successors, (150), 133 states have internal predecessors, (150), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 05:58:21,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 170 transitions. [2023-11-29 05:58:21,989 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 170 transitions. Word has length 43 [2023-11-29 05:58:21,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:58:21,989 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 170 transitions. [2023-11-29 05:58:21,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 states have internal predecessors, (73), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-29 05:58:21,989 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 170 transitions. [2023-11-29 05:58:21,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-29 05:58:21,990 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:58:21,990 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-11-29 05:58:21,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 05:58:22,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 05:58:22,190 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:58:22,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:22,191 INFO L85 PathProgramCache]: Analyzing trace with hash -345804214, now seen corresponding path program 1 times [2023-11-29 05:58:22,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:58:22,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665738117] [2023-11-29 05:58:22,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:22,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:58:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:22,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:58:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:22,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 05:58:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:22,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 05:58:22,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:22,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 05:58:22,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 05:58:22,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:58:22,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665738117] [2023-11-29 05:58:22,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665738117] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:58:22,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560688693] [2023-11-29 05:58:22,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:22,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:58:22,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:58:22,326 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:58:22,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 05:58:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:22,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 05:58:22,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:58:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 05:58:22,662 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:58:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 05:58:22,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560688693] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:58:22,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:58:22,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2023-11-29 05:58:22,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574615051] [2023-11-29 05:58:22,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:58:22,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 05:58:22,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:58:22,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 05:58:22,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:58:22,730 INFO L87 Difference]: Start difference. First operand 149 states and 170 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-29 05:58:23,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:58:23,058 INFO L93 Difference]: Finished difference Result 216 states and 241 transitions. [2023-11-29 05:58:23,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 05:58:23,059 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2023-11-29 05:58:23,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:58:23,060 INFO L225 Difference]: With dead ends: 216 [2023-11-29 05:58:23,060 INFO L226 Difference]: Without dead ends: 216 [2023-11-29 05:58:23,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2023-11-29 05:58:23,061 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 431 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:58:23,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 509 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:58:23,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-11-29 05:58:23,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 164. [2023-11-29 05:58:23,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 136 states have (on average 1.2279411764705883) internal successors, (167), 148 states have internal predecessors, (167), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 05:58:23,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 187 transitions. [2023-11-29 05:58:23,067 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 187 transitions. Word has length 44 [2023-11-29 05:58:23,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:58:23,067 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 187 transitions. [2023-11-29 05:58:23,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-29 05:58:23,067 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 187 transitions. [2023-11-29 05:58:23,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 05:58:23,067 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:58:23,067 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:58:23,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-29 05:58:23,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 05:58:23,268 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:58:23,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:23,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1512964934, now seen corresponding path program 1 times [2023-11-29 05:58:23,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:58:23,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125862651] [2023-11-29 05:58:23,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:23,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:58:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:23,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:58:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:23,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:58:23,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:23,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 05:58:23,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:23,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 05:58:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 05:58:23,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:58:23,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125862651] [2023-11-29 05:58:23,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125862651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:58:23,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:58:23,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:58:23,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58051414] [2023-11-29 05:58:23,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:58:23,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:58:23,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:58:23,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:58:23,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:58:23,326 INFO L87 Difference]: Start difference. First operand 164 states and 187 transitions. Second operand has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 05:58:23,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:58:23,389 INFO L93 Difference]: Finished difference Result 163 states and 186 transitions. [2023-11-29 05:58:23,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:58:23,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2023-11-29 05:58:23,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:58:23,390 INFO L225 Difference]: With dead ends: 163 [2023-11-29 05:58:23,390 INFO L226 Difference]: Without dead ends: 163 [2023-11-29 05:58:23,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:58:23,391 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 87 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:58:23,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 105 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:58:23,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-11-29 05:58:23,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2023-11-29 05:58:23,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 136 states have (on average 1.2205882352941178) internal successors, (166), 147 states have internal predecessors, (166), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 05:58:23,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 186 transitions. [2023-11-29 05:58:23,395 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 186 transitions. Word has length 45 [2023-11-29 05:58:23,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:58:23,395 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 186 transitions. [2023-11-29 05:58:23,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 05:58:23,396 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 186 transitions. [2023-11-29 05:58:23,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 05:58:23,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:58:23,396 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:58:23,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-11-29 05:58:23,397 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:58:23,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:23,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1856513029, now seen corresponding path program 1 times [2023-11-29 05:58:23,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:58:23,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490975768] [2023-11-29 05:58:23,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:23,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:58:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:23,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:58:23,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:23,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:58:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:23,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 05:58:23,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:23,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:58:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:23,529 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 05:58:23,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:58:23,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490975768] [2023-11-29 05:58:23,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490975768] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:58:23,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:58:23,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:58:23,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394127357] [2023-11-29 05:58:23,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:58:23,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:58:23,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:58:23,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:58:23,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:58:23,530 INFO L87 Difference]: Start difference. First operand 163 states and 186 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 05:58:23,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:58:23,703 INFO L93 Difference]: Finished difference Result 176 states and 202 transitions. [2023-11-29 05:58:23,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:58:23,703 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 45 [2023-11-29 05:58:23,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:58:23,705 INFO L225 Difference]: With dead ends: 176 [2023-11-29 05:58:23,705 INFO L226 Difference]: Without dead ends: 176 [2023-11-29 05:58:23,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:58:23,705 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 156 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:58:23,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 203 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:58:23,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2023-11-29 05:58:23,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 168. [2023-11-29 05:58:23,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 141 states have (on average 1.2269503546099292) internal successors, (173), 152 states have internal predecessors, (173), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 05:58:23,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 193 transitions. [2023-11-29 05:58:23,711 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 193 transitions. Word has length 45 [2023-11-29 05:58:23,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:58:23,711 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 193 transitions. [2023-11-29 05:58:23,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 05:58:23,711 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 193 transitions. [2023-11-29 05:58:23,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 05:58:23,712 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:58:23,712 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:58:23,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-11-29 05:58:23,712 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:58:23,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:23,713 INFO L85 PathProgramCache]: Analyzing trace with hash 342727509, now seen corresponding path program 1 times [2023-11-29 05:58:23,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:58:23,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417844703] [2023-11-29 05:58:23,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:23,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:58:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:23,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:58:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:23,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:58:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:23,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 05:58:23,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:23,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 05:58:23,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 05:58:23,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:58:23,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417844703] [2023-11-29 05:58:23,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417844703] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:58:23,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:58:23,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 05:58:23,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410914346] [2023-11-29 05:58:23,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:58:23,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:58:23,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:58:23,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:58:23,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:58:23,853 INFO L87 Difference]: Start difference. First operand 168 states and 193 transitions. Second operand has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 05:58:23,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:58:23,967 INFO L93 Difference]: Finished difference Result 167 states and 192 transitions. [2023-11-29 05:58:23,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:58:23,968 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2023-11-29 05:58:23,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:58:23,969 INFO L225 Difference]: With dead ends: 167 [2023-11-29 05:58:23,969 INFO L226 Difference]: Without dead ends: 167 [2023-11-29 05:58:23,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:58:23,969 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 128 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:58:23,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 101 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:58:23,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-29 05:58:23,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2023-11-29 05:58:23,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 141 states have (on average 1.2198581560283688) internal successors, (172), 151 states have internal predecessors, (172), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 05:58:23,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 192 transitions. [2023-11-29 05:58:23,973 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 192 transitions. Word has length 46 [2023-11-29 05:58:23,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:58:23,974 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 192 transitions. [2023-11-29 05:58:23,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 05:58:23,974 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 192 transitions. [2023-11-29 05:58:23,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 05:58:23,974 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:58:23,974 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:58:23,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-11-29 05:58:23,975 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:58:23,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:23,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1717325933, now seen corresponding path program 1 times [2023-11-29 05:58:23,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:58:23,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250420815] [2023-11-29 05:58:23,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:23,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:58:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:24,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:58:24,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:24,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:58:24,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:24,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 05:58:24,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:24,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:58:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:24,113 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 05:58:24,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:58:24,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250420815] [2023-11-29 05:58:24,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250420815] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:58:24,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:58:24,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:58:24,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435640265] [2023-11-29 05:58:24,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:58:24,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:58:24,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:58:24,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:58:24,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:58:24,115 INFO L87 Difference]: Start difference. First operand 167 states and 192 transitions. Second operand has 9 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 05:58:24,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:58:24,286 INFO L93 Difference]: Finished difference Result 165 states and 189 transitions. [2023-11-29 05:58:24,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:58:24,287 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2023-11-29 05:58:24,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:58:24,288 INFO L225 Difference]: With dead ends: 165 [2023-11-29 05:58:24,288 INFO L226 Difference]: Without dead ends: 165 [2023-11-29 05:58:24,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:58:24,289 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 113 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:58:24,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 234 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:58:24,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-11-29 05:58:24,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2023-11-29 05:58:24,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 141 states have (on average 1.198581560283688) internal successors, (169), 149 states have internal predecessors, (169), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 05:58:24,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 189 transitions. [2023-11-29 05:58:24,294 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 189 transitions. Word has length 46 [2023-11-29 05:58:24,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:58:24,294 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 189 transitions. [2023-11-29 05:58:24,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 05:58:24,295 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 189 transitions. [2023-11-29 05:58:24,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 05:58:24,295 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:58:24,295 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:58:24,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-11-29 05:58:24,296 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:58:24,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:24,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2034618397, now seen corresponding path program 1 times [2023-11-29 05:58:24,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:58:24,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050251150] [2023-11-29 05:58:24,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:24,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:58:24,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:24,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:58:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:24,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:58:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:24,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 05:58:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:24,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 05:58:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:24,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 05:58:24,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:58:24,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050251150] [2023-11-29 05:58:24,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050251150] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:58:24,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:58:24,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:58:24,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924287993] [2023-11-29 05:58:24,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:58:24,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:58:24,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:58:24,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:58:24,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:58:24,494 INFO L87 Difference]: Start difference. First operand 165 states and 189 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 05:58:24,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:58:24,694 INFO L93 Difference]: Finished difference Result 164 states and 188 transitions. [2023-11-29 05:58:24,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:58:24,694 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 47 [2023-11-29 05:58:24,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:58:24,695 INFO L225 Difference]: With dead ends: 164 [2023-11-29 05:58:24,696 INFO L226 Difference]: Without dead ends: 127 [2023-11-29 05:58:24,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:58:24,696 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 78 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:58:24,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 167 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:58:24,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-29 05:58:24,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-11-29 05:58:24,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 109 states have (on average 1.2293577981651376) internal successors, (134), 116 states have internal predecessors, (134), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 05:58:24,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 148 transitions. [2023-11-29 05:58:24,702 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 148 transitions. Word has length 47 [2023-11-29 05:58:24,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:58:24,702 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 148 transitions. [2023-11-29 05:58:24,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 05:58:24,703 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 148 transitions. [2023-11-29 05:58:24,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 05:58:24,703 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:58:24,703 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2023-11-29 05:58:24,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-11-29 05:58:24,704 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:58:24,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:24,704 INFO L85 PathProgramCache]: Analyzing trace with hash 769915804, now seen corresponding path program 2 times [2023-11-29 05:58:24,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:58:24,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379296688] [2023-11-29 05:58:24,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:24,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:58:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:24,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:58:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:24,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 05:58:24,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:24,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 05:58:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:24,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 05:58:24,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:24,967 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 05:58:24,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:58:24,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379296688] [2023-11-29 05:58:24,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379296688] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:58:24,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53634803] [2023-11-29 05:58:24,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:58:24,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:58:24,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:58:24,969 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:58:24,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 05:58:25,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:58:25,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:58:25,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 05:58:25,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:58:25,255 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 05:58:25,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:58:25,536 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 9 treesize of output 7 [2023-11-29 05:58:25,600 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 05:58:25,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53634803] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:58:25,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:58:25,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 29 [2023-11-29 05:58:25,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200172809] [2023-11-29 05:58:25,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:58:25,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 05:58:25,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:58:25,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 05:58:25,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2023-11-29 05:58:25,603 INFO L87 Difference]: Start difference. First operand 127 states and 148 transitions. Second operand has 30 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 29 states have internal predecessors, (72), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 05:58:26,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:58:26,387 INFO L93 Difference]: Finished difference Result 165 states and 188 transitions. [2023-11-29 05:58:26,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 05:58:26,387 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 29 states have internal predecessors, (72), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2023-11-29 05:58:26,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:58:26,388 INFO L225 Difference]: With dead ends: 165 [2023-11-29 05:58:26,388 INFO L226 Difference]: Without dead ends: 165 [2023-11-29 05:58:26,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 80 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=382, Invalid=1510, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 05:58:26,389 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 463 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:58:26,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 435 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 05:58:26,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-11-29 05:58:26,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 128. [2023-11-29 05:58:26,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 110 states have (on average 1.2272727272727273) internal successors, (135), 117 states have internal predecessors, (135), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 05:58:26,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 149 transitions. [2023-11-29 05:58:26,392 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 149 transitions. Word has length 47 [2023-11-29 05:58:26,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:58:26,393 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 149 transitions. [2023-11-29 05:58:26,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 29 states have internal predecessors, (72), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 05:58:26,393 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 149 transitions. [2023-11-29 05:58:26,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-29 05:58:26,394 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:58:26,394 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:58:26,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 05:58:26,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 05:58:26,594 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:58:26,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:26,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1046724290, now seen corresponding path program 1 times [2023-11-29 05:58:26,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:58:26,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140296340] [2023-11-29 05:58:26,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:26,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:58:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:26,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:58:26,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:26,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:58:26,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:26,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 05:58:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:26,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:58:26,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:26,729 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 05:58:26,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:58:26,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140296340] [2023-11-29 05:58:26,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140296340] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:58:26,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659499908] [2023-11-29 05:58:26,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:26,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:58:26,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:58:26,730 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:58:26,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 05:58:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:26,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:58:26,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:58:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 05:58:26,852 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:58:26,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659499908] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:58:26,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:58:26,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 12 [2023-11-29 05:58:26,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436275921] [2023-11-29 05:58:26,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:58:26,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:58:26,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:58:26,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:58:26,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:58:26,854 INFO L87 Difference]: Start difference. First operand 128 states and 149 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:58:26,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:58:26,895 INFO L93 Difference]: Finished difference Result 131 states and 150 transitions. [2023-11-29 05:58:26,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:58:26,895 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2023-11-29 05:58:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:58:26,896 INFO L225 Difference]: With dead ends: 131 [2023-11-29 05:58:26,896 INFO L226 Difference]: Without dead ends: 131 [2023-11-29 05:58:26,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:58:26,896 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 22 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:58:26,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 126 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:58:26,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-29 05:58:26,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2023-11-29 05:58:26,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 111 states have (on average 1.2252252252252251) internal successors, (136), 118 states have internal predecessors, (136), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 05:58:26,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 150 transitions. [2023-11-29 05:58:26,899 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 150 transitions. Word has length 48 [2023-11-29 05:58:26,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:58:26,899 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 150 transitions. [2023-11-29 05:58:26,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:58:26,899 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 150 transitions. [2023-11-29 05:58:26,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 05:58:26,900 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:58:26,900 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:58:26,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-29 05:58:27,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-29 05:58:27,100 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:58:27,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:27,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1390719526, now seen corresponding path program 2 times [2023-11-29 05:58:27,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:58:27,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535613508] [2023-11-29 05:58:27,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:27,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:58:27,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:27,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:58:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:27,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 05:58:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:27,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 05:58:27,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:27,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 05:58:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-29 05:58:27,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:58:27,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535613508] [2023-11-29 05:58:27,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535613508] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:58:27,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024183669] [2023-11-29 05:58:27,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:58:27,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:58:27,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:58:27,182 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:58:27,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 05:58:27,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:58:27,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:58:27,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 05:58:27,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:58:27,380 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 05:58:27,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:58:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 05:58:27,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024183669] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:58:27,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:58:27,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 21 [2023-11-29 05:58:27,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188101000] [2023-11-29 05:58:27,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:58:27,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 05:58:27,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:58:27,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 05:58:27,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2023-11-29 05:58:27,472 INFO L87 Difference]: Start difference. First operand 129 states and 150 transitions. Second operand has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 20 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:58:27,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:58:27,885 INFO L93 Difference]: Finished difference Result 166 states and 188 transitions. [2023-11-29 05:58:27,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 05:58:27,885 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 20 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2023-11-29 05:58:27,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:58:27,886 INFO L225 Difference]: With dead ends: 166 [2023-11-29 05:58:27,886 INFO L226 Difference]: Without dead ends: 166 [2023-11-29 05:58:27,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=943, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 05:58:27,887 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 282 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:58:27,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 626 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:58:27,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-11-29 05:58:27,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 129. [2023-11-29 05:58:27,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 111 states have (on average 1.2162162162162162) internal successors, (135), 118 states have internal predecessors, (135), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 05:58:27,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 149 transitions. [2023-11-29 05:58:27,897 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 149 transitions. Word has length 50 [2023-11-29 05:58:27,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:58:27,898 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 149 transitions. [2023-11-29 05:58:27,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 20 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:58:27,898 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 149 transitions. [2023-11-29 05:58:27,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 05:58:27,898 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:58:27,898 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2023-11-29 05:58:27,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 05:58:28,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:58:28,099 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:58:28,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:28,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1436499610, now seen corresponding path program 3 times [2023-11-29 05:58:28,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:58:28,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757865848] [2023-11-29 05:58:28,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:28,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:58:28,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:28,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:58:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:28,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 05:58:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:28,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 05:58:28,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:28,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 05:58:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:58:28,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:58:28,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757865848] [2023-11-29 05:58:28,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757865848] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:58:28,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710222598] [2023-11-29 05:58:28,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:58:28,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:58:28,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:58:28,293 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:58:28,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 05:58:28,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 05:58:28,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:58:28,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 05:58:28,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:58:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 05:58:28,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:58:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 05:58:28,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710222598] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:58:28,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:58:28,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 28 [2023-11-29 05:58:28,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93285495] [2023-11-29 05:58:28,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:58:28,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 05:58:28,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:58:28,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 05:58:28,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2023-11-29 05:58:28,890 INFO L87 Difference]: Start difference. First operand 129 states and 149 transitions. Second operand has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:58:30,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:58:30,140 INFO L93 Difference]: Finished difference Result 229 states and 259 transitions. [2023-11-29 05:58:30,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 05:58:30,141 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2023-11-29 05:58:30,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:58:30,142 INFO L225 Difference]: With dead ends: 229 [2023-11-29 05:58:30,142 INFO L226 Difference]: Without dead ends: 229 [2023-11-29 05:58:30,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=677, Invalid=2863, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 05:58:30,144 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 489 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:58:30,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 373 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 05:58:30,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2023-11-29 05:58:30,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 140. [2023-11-29 05:58:30,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 122 states have (on average 1.1885245901639345) internal successors, (145), 129 states have internal predecessors, (145), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 05:58:30,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 159 transitions. [2023-11-29 05:58:30,148 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 159 transitions. Word has length 50 [2023-11-29 05:58:30,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:58:30,149 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 159 transitions. [2023-11-29 05:58:30,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:58:30,149 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 159 transitions. [2023-11-29 05:58:30,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-29 05:58:30,149 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:58:30,149 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:58:30,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 05:58:30,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-11-29 05:58:30,350 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:58:30,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:30,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1909311993, now seen corresponding path program 1 times [2023-11-29 05:58:30,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:58:30,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008576786] [2023-11-29 05:58:30,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:30,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:58:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:30,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:58:30,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:30,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:58:30,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:30,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 05:58:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:30,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:58:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 05:58:30,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:58:30,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008576786] [2023-11-29 05:58:30,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008576786] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:58:30,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458978787] [2023-11-29 05:58:30,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:30,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:58:30,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:58:30,501 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:58:30,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 05:58:30,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:30,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:58:30,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:58:30,655 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 05:58:30,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:58:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 05:58:30,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458978787] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:58:30,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:58:30,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 14 [2023-11-29 05:58:30,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837010027] [2023-11-29 05:58:30,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:58:30,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:58:30,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:58:30,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:58:30,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:58:30,759 INFO L87 Difference]: Start difference. First operand 140 states and 159 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:58:30,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:58:30,984 INFO L93 Difference]: Finished difference Result 143 states and 162 transitions. [2023-11-29 05:58:30,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 05:58:30,985 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2023-11-29 05:58:30,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:58:30,986 INFO L225 Difference]: With dead ends: 143 [2023-11-29 05:58:30,986 INFO L226 Difference]: Without dead ends: 143 [2023-11-29 05:58:30,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:58:30,987 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 168 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:58:30,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 282 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:58:30,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-11-29 05:58:30,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2023-11-29 05:58:30,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 130 states have internal predecessors, (146), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 05:58:30,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 160 transitions. [2023-11-29 05:58:30,990 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 160 transitions. Word has length 51 [2023-11-29 05:58:30,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:58:30,990 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 160 transitions. [2023-11-29 05:58:30,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:58:30,990 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 160 transitions. [2023-11-29 05:58:30,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-29 05:58:30,991 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:58:30,991 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:58:30,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 05:58:31,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-11-29 05:58:31,192 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:58:31,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:31,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1840549562, now seen corresponding path program 1 times [2023-11-29 05:58:31,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:58:31,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061500925] [2023-11-29 05:58:31,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:31,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:58:31,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:31,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:58:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:31,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:58:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:31,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 05:58:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:31,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:58:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:31,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 05:58:31,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:58:31,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061500925] [2023-11-29 05:58:31,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061500925] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:58:31,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717843867] [2023-11-29 05:58:31,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:31,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:58:31,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:58:31,337 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:58:31,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 05:58:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:31,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:58:31,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:58:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 05:58:31,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:58:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 05:58:31,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717843867] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:58:31,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:58:31,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2023-11-29 05:58:31,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297443127] [2023-11-29 05:58:31,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:58:31,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 05:58:31,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:58:31,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 05:58:31,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:58:31,601 INFO L87 Difference]: Start difference. First operand 141 states and 160 transitions. Second operand has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 18 states have internal predecessors, (78), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:58:31,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:58:31,840 INFO L93 Difference]: Finished difference Result 171 states and 193 transitions. [2023-11-29 05:58:31,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:58:31,840 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 18 states have internal predecessors, (78), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2023-11-29 05:58:31,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:58:31,841 INFO L225 Difference]: With dead ends: 171 [2023-11-29 05:58:31,841 INFO L226 Difference]: Without dead ends: 171 [2023-11-29 05:58:31,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2023-11-29 05:58:31,842 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 97 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:58:31,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 335 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:58:31,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-11-29 05:58:31,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 154. [2023-11-29 05:58:31,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 136 states have (on average 1.1838235294117647) internal successors, (161), 143 states have internal predecessors, (161), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 05:58:31,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 175 transitions. [2023-11-29 05:58:31,846 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 175 transitions. Word has length 51 [2023-11-29 05:58:31,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:58:31,846 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 175 transitions. [2023-11-29 05:58:31,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 18 states have internal predecessors, (78), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:58:31,847 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 175 transitions. [2023-11-29 05:58:31,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-29 05:58:31,847 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:58:31,847 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2023-11-29 05:58:31,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 05:58:32,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-11-29 05:58:32,048 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:58:32,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:32,048 INFO L85 PathProgramCache]: Analyzing trace with hash -577424523, now seen corresponding path program 3 times [2023-11-29 05:58:32,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:58:32,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836790517] [2023-11-29 05:58:32,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:32,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:58:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:32,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:58:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:32,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 05:58:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:32,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 05:58:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:32,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 05:58:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-29 05:58:32,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:58:32,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836790517] [2023-11-29 05:58:32,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836790517] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:58:32,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301445440] [2023-11-29 05:58:32,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:58:32,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:58:32,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:58:32,241 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:58:32,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 05:58:32,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 05:58:32,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:58:32,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 05:58:32,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:58:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-29 05:58:33,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:58:33,577 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 23 treesize of output 19 [2023-11-29 05:58:33,832 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-29 05:58:33,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301445440] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:58:33,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:58:33,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 36 [2023-11-29 05:58:33,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863071701] [2023-11-29 05:58:33,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:58:33,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-29 05:58:33,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:58:33,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-29 05:58:33,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 05:58:33,835 INFO L87 Difference]: Start difference. First operand 154 states and 175 transitions. Second operand has 37 states, 36 states have (on average 2.361111111111111) internal successors, (85), 36 states have internal predecessors, (85), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-11-29 05:58:36,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:58:36,226 INFO L93 Difference]: Finished difference Result 202 states and 226 transitions. [2023-11-29 05:58:36,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 05:58:36,227 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.361111111111111) internal successors, (85), 36 states have internal predecessors, (85), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 54 [2023-11-29 05:58:36,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:58:36,228 INFO L225 Difference]: With dead ends: 202 [2023-11-29 05:58:36,228 INFO L226 Difference]: Without dead ends: 202 [2023-11-29 05:58:36,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=904, Invalid=3518, Unknown=0, NotChecked=0, Total=4422 [2023-11-29 05:58:36,230 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 689 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 05:58:36,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 474 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 05:58:36,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-11-29 05:58:36,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 156. [2023-11-29 05:58:36,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 138 states have (on average 1.181159420289855) internal successors, (163), 145 states have internal predecessors, (163), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 05:58:36,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 177 transitions. [2023-11-29 05:58:36,233 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 177 transitions. Word has length 54 [2023-11-29 05:58:36,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:58:36,233 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 177 transitions. [2023-11-29 05:58:36,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.361111111111111) internal successors, (85), 36 states have internal predecessors, (85), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-11-29 05:58:36,233 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 177 transitions. [2023-11-29 05:58:36,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-29 05:58:36,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:58:36,234 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:58:36,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-29 05:58:36,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-29 05:58:36,434 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:58:36,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:36,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1289053970, now seen corresponding path program 1 times [2023-11-29 05:58:36,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:58:36,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284523320] [2023-11-29 05:58:36,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:36,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:58:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:38,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:58:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:38,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:58:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:38,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 05:58:38,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:38,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:58:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:38,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 05:58:38,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:58:38,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284523320] [2023-11-29 05:58:38,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284523320] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:58:38,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226983831] [2023-11-29 05:58:38,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:38,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:58:38,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:58:38,410 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:58:38,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 05:58:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:38,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-29 05:58:38,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:58:38,903 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 [2023-11-29 05:58:39,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-11-29 05:58:39,147 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 [2023-11-29 05:58:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 05:58:39,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:58:39,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2023-11-29 05:58:39,626 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 33 treesize of output 31 [2023-11-29 05:58:39,630 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 36 treesize of output 29 [2023-11-29 05:58:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 05:58:39,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226983831] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:58:39,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:58:39,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20, 17] total 54 [2023-11-29 05:58:39,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849743790] [2023-11-29 05:58:39,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:58:39,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-29 05:58:39,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:58:39,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-29 05:58:39,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2674, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 05:58:39,988 INFO L87 Difference]: Start difference. First operand 156 states and 177 transitions. Second operand has 54 states, 50 states have (on average 2.26) internal successors, (113), 52 states have internal predecessors, (113), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-29 05:58:46,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:58:46,261 INFO L93 Difference]: Finished difference Result 207 states and 231 transitions. [2023-11-29 05:58:46,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-29 05:58:46,262 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 50 states have (on average 2.26) internal successors, (113), 52 states have internal predecessors, (113), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 57 [2023-11-29 05:58:46,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:58:46,263 INFO L225 Difference]: With dead ends: 207 [2023-11-29 05:58:46,263 INFO L226 Difference]: Without dead ends: 207 [2023-11-29 05:58:46,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1880 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=798, Invalid=8132, Unknown=0, NotChecked=0, Total=8930 [2023-11-29 05:58:46,267 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 400 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 1507 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 1538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:58:46,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 567 Invalid, 1538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1507 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 05:58:46,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-11-29 05:58:46,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 171. [2023-11-29 05:58:46,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 153 states have (on average 1.1764705882352942) internal successors, (180), 160 states have internal predecessors, (180), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 05:58:46,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 194 transitions. [2023-11-29 05:58:46,272 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 194 transitions. Word has length 57 [2023-11-29 05:58:46,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:58:46,272 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 194 transitions. [2023-11-29 05:58:46,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 50 states have (on average 2.26) internal successors, (113), 52 states have internal predecessors, (113), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-29 05:58:46,272 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 194 transitions. [2023-11-29 05:58:46,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-29 05:58:46,272 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:58:46,273 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 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] [2023-11-29 05:58:46,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 05:58:46,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-29 05:58:46,473 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:58:46,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:46,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1247204845, now seen corresponding path program 3 times [2023-11-29 05:58:46,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:58:46,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369969971] [2023-11-29 05:58:46,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:46,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:58:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:46,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:58:46,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:46,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 05:58:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:46,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 05:58:46,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:46,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 05:58:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 05:58:46,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:58:46,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369969971] [2023-11-29 05:58:46,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369969971] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:58:46,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805754378] [2023-11-29 05:58:46,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:58:46,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:58:46,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:58:46,781 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:58:46,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 05:58:47,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 05:58:47,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:58:47,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 05:58:47,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:58:47,639 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-29 05:58:47,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:58:48,121 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 [2023-11-29 05:58:48,209 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-29 05:58:48,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805754378] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:58:48,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:58:48,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 38 [2023-11-29 05:58:48,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395314339] [2023-11-29 05:58:48,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:58:48,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 05:58:48,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:58:48,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 05:58:48,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1327, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 05:58:48,211 INFO L87 Difference]: Start difference. First operand 171 states and 194 transitions. Second operand has 39 states, 38 states have (on average 2.6052631578947367) internal successors, (99), 38 states have internal predecessors, (99), 5 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-29 05:58:52,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:58:52,102 INFO L93 Difference]: Finished difference Result 255 states and 289 transitions. [2023-11-29 05:58:52,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-29 05:58:52,102 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.6052631578947367) internal successors, (99), 38 states have internal predecessors, (99), 5 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 57 [2023-11-29 05:58:52,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:58:52,103 INFO L225 Difference]: With dead ends: 255 [2023-11-29 05:58:52,103 INFO L226 Difference]: Without dead ends: 255 [2023-11-29 05:58:52,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1475 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1794, Invalid=6396, Unknown=0, NotChecked=0, Total=8190 [2023-11-29 05:58:52,105 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 568 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 2195 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:58:52,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 783 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2195 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 05:58:52,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2023-11-29 05:58:52,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 187. [2023-11-29 05:58:52,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 169 states have (on average 1.183431952662722) internal successors, (200), 176 states have internal predecessors, (200), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 05:58:52,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 214 transitions. [2023-11-29 05:58:52,109 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 214 transitions. Word has length 57 [2023-11-29 05:58:52,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:58:52,109 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 214 transitions. [2023-11-29 05:58:52,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.6052631578947367) internal successors, (99), 38 states have internal predecessors, (99), 5 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-29 05:58:52,109 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 214 transitions. [2023-11-29 05:58:52,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-29 05:58:52,110 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:58:52,110 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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] [2023-11-29 05:58:52,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-29 05:58:52,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-29 05:58:52,311 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:58:52,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:52,311 INFO L85 PathProgramCache]: Analyzing trace with hash -528992250, now seen corresponding path program 4 times [2023-11-29 05:58:52,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:58:52,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310533541] [2023-11-29 05:58:52,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:52,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:58:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:52,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:58:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:52,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 05:58:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:52,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 05:58:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:52,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 05:58:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:52,505 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 05:58:52,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:58:52,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310533541] [2023-11-29 05:58:52,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310533541] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:58:52,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732558122] [2023-11-29 05:58:52,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:58:52,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:58:52,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:58:52,507 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:58:52,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 05:58:52,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:58:52,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:58:52,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 05:58:52,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:58:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 05:58:52,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:58:52,879 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 05:58:52,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732558122] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:58:52,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:58:52,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 25 [2023-11-29 05:58:52,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743553182] [2023-11-29 05:58:52,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:58:52,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 05:58:52,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:58:52,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 05:58:52,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:58:52,881 INFO L87 Difference]: Start difference. First operand 187 states and 214 transitions. Second operand has 25 states, 25 states have (on average 3.24) internal successors, (81), 24 states have internal predecessors, (81), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:58:53,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:58:53,266 INFO L93 Difference]: Finished difference Result 252 states and 286 transitions. [2023-11-29 05:58:53,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 05:58:53,266 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.24) internal successors, (81), 24 states have internal predecessors, (81), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 58 [2023-11-29 05:58:53,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:58:53,267 INFO L225 Difference]: With dead ends: 252 [2023-11-29 05:58:53,267 INFO L226 Difference]: Without dead ends: 252 [2023-11-29 05:58:53,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 05:58:53,268 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 240 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:58:53,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 518 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:58:53,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-11-29 05:58:53,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 199. [2023-11-29 05:58:53,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 181 states have (on average 1.1933701657458564) internal successors, (216), 188 states have internal predecessors, (216), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 05:58:53,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 230 transitions. [2023-11-29 05:58:53,272 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 230 transitions. Word has length 58 [2023-11-29 05:58:53,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:58:53,272 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 230 transitions. [2023-11-29 05:58:53,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.24) internal successors, (81), 24 states have internal predecessors, (81), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:58:53,273 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 230 transitions. [2023-11-29 05:58:53,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 05:58:53,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:58:53,273 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:58:53,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-29 05:58:53,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-29 05:58:53,474 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:58:53,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:53,474 INFO L85 PathProgramCache]: Analyzing trace with hash 910184612, now seen corresponding path program 1 times [2023-11-29 05:58:53,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:58:53,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546369981] [2023-11-29 05:58:53,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:53,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:58:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:53,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:58:53,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:53,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:58:53,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:53,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 05:58:53,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:53,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:58:53,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:53,826 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:58:53,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:58:53,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546369981] [2023-11-29 05:58:53,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546369981] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:58:53,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131805349] [2023-11-29 05:58:53,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:53,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:58:53,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:58:53,828 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:58:53,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 05:58:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:53,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 05:58:53,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:58:54,170 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 05:58:54,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:58:54,335 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 [2023-11-29 05:58:54,419 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 05:58:54,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131805349] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:58:54,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:58:54,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 28 [2023-11-29 05:58:54,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776304302] [2023-11-29 05:58:54,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:58:54,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 05:58:54,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:58:54,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 05:58:54,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2023-11-29 05:58:54,421 INFO L87 Difference]: Start difference. First operand 199 states and 230 transitions. Second operand has 29 states, 28 states have (on average 4.607142857142857) internal successors, (129), 28 states have internal predecessors, (129), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-29 05:58:54,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:58:54,846 INFO L93 Difference]: Finished difference Result 209 states and 239 transitions. [2023-11-29 05:58:54,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:58:54,847 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.607142857142857) internal successors, (129), 28 states have internal predecessors, (129), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 60 [2023-11-29 05:58:54,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:58:54,848 INFO L225 Difference]: With dead ends: 209 [2023-11-29 05:58:54,848 INFO L226 Difference]: Without dead ends: 209 [2023-11-29 05:58:54,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=304, Invalid=1178, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 05:58:54,849 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 312 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:58:54,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 260 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:58:54,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-11-29 05:58:54,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 201. [2023-11-29 05:58:54,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 183 states have (on average 1.1912568306010929) internal successors, (218), 190 states have internal predecessors, (218), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 05:58:54,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 232 transitions. [2023-11-29 05:58:54,854 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 232 transitions. Word has length 60 [2023-11-29 05:58:54,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:58:54,854 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 232 transitions. [2023-11-29 05:58:54,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.607142857142857) internal successors, (129), 28 states have internal predecessors, (129), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-29 05:58:54,855 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 232 transitions. [2023-11-29 05:58:54,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 05:58:54,855 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:58:54,855 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 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] [2023-11-29 05:58:54,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 05:58:55,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-11-29 05:58:55,056 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:58:55,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:55,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1556883477, now seen corresponding path program 1 times [2023-11-29 05:58:55,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:58:55,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068519728] [2023-11-29 05:58:55,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:55,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:58:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:55,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:58:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:55,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 05:58:55,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:55,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 05:58:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:55,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 05:58:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 40 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 05:58:55,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:58:55,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068519728] [2023-11-29 05:58:55,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068519728] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:58:55,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667385758] [2023-11-29 05:58:55,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:55,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:58:55,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:58:55,262 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:58:55,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 05:58:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:55,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 05:58:55,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:58:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 05:58:55,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:58:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 05:58:55,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667385758] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:58:55,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:58:55,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 20 [2023-11-29 05:58:55,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426594690] [2023-11-29 05:58:55,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:58:55,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 05:58:55,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:58:55,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 05:58:55,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:58:55,603 INFO L87 Difference]: Start difference. First operand 201 states and 232 transitions. Second operand has 20 states, 20 states have (on average 4.0) internal successors, (80), 19 states have internal predecessors, (80), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:58:56,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:58:56,027 INFO L93 Difference]: Finished difference Result 253 states and 286 transitions. [2023-11-29 05:58:56,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 05:58:56,027 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 19 states have internal predecessors, (80), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 60 [2023-11-29 05:58:56,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:58:56,028 INFO L225 Difference]: With dead ends: 253 [2023-11-29 05:58:56,028 INFO L226 Difference]: Without dead ends: 253 [2023-11-29 05:58:56,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 116 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=263, Invalid=927, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 05:58:56,029 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 168 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:58:56,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 437 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:58:56,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-11-29 05:58:56,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 198. [2023-11-29 05:58:56,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 180 states have (on average 1.1777777777777778) internal successors, (212), 187 states have internal predecessors, (212), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 05:58:56,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 226 transitions. [2023-11-29 05:58:56,034 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 226 transitions. Word has length 60 [2023-11-29 05:58:56,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:58:56,034 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 226 transitions. [2023-11-29 05:58:56,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 19 states have internal predecessors, (80), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 05:58:56,035 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 226 transitions. [2023-11-29 05:58:56,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-29 05:58:56,035 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:58:56,035 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:58:56,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 05:58:56,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-29 05:58:56,236 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 05:58:56,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:58:56,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1485849082, now seen corresponding path program 1 times [2023-11-29 05:58:56,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:58:56,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703790895] [2023-11-29 05:58:56,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:56,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:58:56,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:59,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 05:58:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:59,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:58:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:59,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 05:58:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:59,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:58:59,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:59,255 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 05:58:59,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:58:59,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703790895] [2023-11-29 05:58:59,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703790895] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:58:59,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113628700] [2023-11-29 05:58:59,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:58:59,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:58:59,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:58:59,257 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:58:59,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 05:58:59,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:58:59,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 128 conjunts are in the unsatisfiable core [2023-11-29 05:58:59,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:58:59,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 05:58:59,603 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 7 treesize of output 6 [2023-11-29 05:58:59,734 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-29 05:58:59,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-11-29 05:58:59,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-11-29 05:58:59,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-11-29 05:58:59,964 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 11 treesize of output 10 [2023-11-29 05:59:00,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2023-11-29 05:59:00,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 29 [2023-11-29 05:59:00,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 49 [2023-11-29 05:59:01,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 53 [2023-11-29 05:59:02,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 87 [2023-11-29 05:59:02,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 122 [2023-11-29 05:59:07,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 192 [2023-11-29 05:59:07,645 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:59:07,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 39 [2023-11-29 05:59:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:59:07,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:04:18,256 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_upsweep_~right~0#1_93| Int) (v_ArrVal_1182 Int) (|ULTIMATE.start_upsweep_#t~mem6#1| Int) (|ULTIMATE.start_upsweep_#t~mem5#1| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_downsweep_~left~1#1_46| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_54| Int)) (or (let ((.cse7 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (let ((.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4 .cse7))) (let ((.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse0 (store |c_#memory_int#1| |c_ULTIMATE.start_main_~a0~0#1.base| (let ((.cse6 (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ |ULTIMATE.start_main_~a0~0#1.offset| .cse7) |c_ULTIMATE.start_main_#t~mem18#1|))) (store .cse6 (+ |ULTIMATE.start_main_~a0~0#1.offset| 4 .cse7) (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_main_~a0~0#1.base| .cse6) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5)))))) (let ((.cse1 (let ((.cse4 (+ (* 4 |v_ULTIMATE.start_downsweep_~left~1#1_46|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store (let ((.cse3 (store (store (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_93| 4) |v_ULTIMATE.start_upsweep_~a#1.offset_54|) (+ |ULTIMATE.start_upsweep_#t~mem6#1| |ULTIMATE.start_upsweep_#t~mem5#1|)) .cse5 0))) (store .cse3 .cse2 (+ (select .cse3 .cse2) (select .cse3 .cse4)))) .cse4 v_ArrVal_1182)))) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~a0~0#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|) (select .cse1 .cse2)))))) (< 0 |v_ULTIMATE.start_downsweep_~left~1#1_46|) (< |v_ULTIMATE.start_upsweep_~a#1.offset_54| |c_ULTIMATE.start_main_~a~0#1.offset|) (< |v_ULTIMATE.start_upsweep_~right~0#1_93| 1))) is different from false [2023-11-29 06:04:22,343 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_upsweep_~right~0#1_93| Int) (v_ArrVal_1182 Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (|ULTIMATE.start_upsweep_#t~mem6#1| Int) (|ULTIMATE.start_upsweep_#t~mem5#1| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_downsweep_~left~1#1_46| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_54| Int)) (or (let ((.cse7 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (let ((.cse5 (+ |ULTIMATE.start_main_~a~0#1.offset| 4 .cse7))) (let ((.cse2 (+ |ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse0 (store |c_#memory_int#1| |c_ULTIMATE.start_main_~a0~0#1.base| (let ((.cse6 (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ |ULTIMATE.start_main_~a0~0#1.offset| .cse7) (select (select |c_#memory_int#1| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse7))))) (store .cse6 (+ |ULTIMATE.start_main_~a0~0#1.offset| 4 .cse7) (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_main_~a0~0#1.base| .cse6) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5)))))) (let ((.cse1 (let ((.cse4 (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 |v_ULTIMATE.start_downsweep_~left~1#1_46|)))) (store (let ((.cse3 (store (store (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_93| 4) |v_ULTIMATE.start_upsweep_~a#1.offset_54|) (+ |ULTIMATE.start_upsweep_#t~mem6#1| |ULTIMATE.start_upsweep_#t~mem5#1|)) .cse5 0))) (store .cse3 .cse2 (+ (select .cse3 .cse2) (select .cse3 .cse4)))) .cse4 v_ArrVal_1182)))) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~a0~0#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|) (select .cse1 .cse2)))))) (< 0 |v_ULTIMATE.start_downsweep_~left~1#1_46|) (< |v_ULTIMATE.start_upsweep_~right~0#1_93| 1) (< |v_ULTIMATE.start_upsweep_~a#1.offset_54| |ULTIMATE.start_main_~a~0#1.offset|))) is different from false [2023-11-29 06:04:26,459 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_upsweep_~right~0#1_93| Int) (v_ArrVal_1182 Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (|ULTIMATE.start_upsweep_#t~mem6#1| Int) (|ULTIMATE.start_upsweep_#t~mem5#1| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_downsweep_~left~1#1_46| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_54| Int)) (or (let ((.cse1 (+ |ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse2 (store |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base| (let ((.cse5 (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_main_~a0~0#1.offset| (select (select |c_#memory_int#1| |c_ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|)))) (store .cse5 (+ |ULTIMATE.start_main_~a0~0#1.offset| 4) (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse5) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1)))))) (let ((.cse0 (let ((.cse4 (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 |v_ULTIMATE.start_downsweep_~left~1#1_46|)))) (store (let ((.cse3 (store (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_93| 4) |v_ULTIMATE.start_upsweep_~a#1.offset_54|) (+ |ULTIMATE.start_upsweep_#t~mem6#1| |ULTIMATE.start_upsweep_#t~mem5#1|)))) (store .cse3 .cse1 (select (store .cse3 .cse1 0) .cse4))) .cse4 v_ArrVal_1182)))) (= (select .cse0 .cse1) (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| .cse0) |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|))))) (< 0 |v_ULTIMATE.start_downsweep_~left~1#1_46|) (< |v_ULTIMATE.start_upsweep_~right~0#1_93| 1) (< |v_ULTIMATE.start_upsweep_~a#1.offset_54| |ULTIMATE.start_main_~a~0#1.offset|))) is different from false [2023-11-29 06:04:26,530 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_upsweep_~right~0#1_93| Int) (v_ArrVal_1182 Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (|ULTIMATE.start_upsweep_#t~mem6#1| Int) (|ULTIMATE.start_upsweep_#t~mem5#1| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (v_ArrVal_1186 (Array Int Int)) (|v_ULTIMATE.start_downsweep_~left~1#1_46| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_54| Int)) (or (< 0 |v_ULTIMATE.start_downsweep_~left~1#1_46|) (< |v_ULTIMATE.start_upsweep_~right~0#1_93| 1) (< |v_ULTIMATE.start_upsweep_~a#1.offset_54| |ULTIMATE.start_main_~a~0#1.offset|) (let ((.cse1 (+ |ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse2 (store |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base| (let ((.cse5 (store v_ArrVal_1186 |ULTIMATE.start_main_~a0~0#1.offset| (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base| v_ArrVal_1186) |c_ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|)))) (store .cse5 (+ |ULTIMATE.start_main_~a0~0#1.offset| 4) (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse5) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1)))))) (let ((.cse0 (let ((.cse4 (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 |v_ULTIMATE.start_downsweep_~left~1#1_46|)))) (store (let ((.cse3 (store (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_93| 4) |v_ULTIMATE.start_upsweep_~a#1.offset_54|) (+ |ULTIMATE.start_upsweep_#t~mem6#1| |ULTIMATE.start_upsweep_#t~mem5#1|)))) (store .cse3 .cse1 (select (store .cse3 .cse1 0) .cse4))) .cse4 v_ArrVal_1182)))) (= (select .cse0 .cse1) (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| .cse0) |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|))))))) is different from false [2023-11-29 06:04:26,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113628700] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:04:26,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:04:26,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 35] total 65 [2023-11-29 06:04:26,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47422216] [2023-11-29 06:04:26,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:04:26,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-11-29 06:04:26,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:04:26,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-11-29 06:04:26,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=6648, Unknown=63, NotChecked=676, Total=7832 [2023-11-29 06:04:26,535 INFO L87 Difference]: Start difference. First operand 198 states and 226 transitions. Second operand has 65 states, 57 states have (on average 1.736842105263158) internal successors, (99), 60 states have internal predecessors, (99), 6 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-11-29 06:04:47,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:04:47,601 INFO L93 Difference]: Finished difference Result 221 states and 249 transitions. [2023-11-29 06:04:47,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-29 06:04:47,602 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 57 states have (on average 1.736842105263158) internal successors, (99), 60 states have internal predecessors, (99), 6 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 62 [2023-11-29 06:04:47,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:04:47,603 INFO L225 Difference]: With dead ends: 221 [2023-11-29 06:04:47,604 INFO L226 Difference]: Without dead ends: 221 [2023-11-29 06:04:47,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 3578 ImplicationChecksByTransitivity, 343.8s TimeCoverageRelationStatistics Valid=1084, Invalid=13629, Unknown=65, NotChecked=972, Total=15750 [2023-11-29 06:04:47,605 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 353 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1688 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 1724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:04:47,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 634 Invalid, 1724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1688 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-29 06:04:47,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-11-29 06:04:47,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 202. [2023-11-29 06:04:47,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 184 states have (on average 1.1684782608695652) internal successors, (215), 191 states have internal predecessors, (215), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 06:04:47,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 229 transitions. [2023-11-29 06:04:47,610 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 229 transitions. Word has length 62 [2023-11-29 06:04:47,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:04:47,610 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 229 transitions. [2023-11-29 06:04:47,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 57 states have (on average 1.736842105263158) internal successors, (99), 60 states have internal predecessors, (99), 6 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-11-29 06:04:47,610 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 229 transitions. [2023-11-29 06:04:47,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-29 06:04:47,611 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:04:47,611 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:04:47,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 06:04:47,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-11-29 06:04:47,812 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 06:04:47,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:04:47,812 INFO L85 PathProgramCache]: Analyzing trace with hash 2100451330, now seen corresponding path program 2 times [2023-11-29 06:04:47,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:04:47,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137140278] [2023-11-29 06:04:47,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:04:47,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:04:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:47,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:04:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:47,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 06:04:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:47,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 06:04:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:47,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 06:04:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-29 06:04:47,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:04:47,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137140278] [2023-11-29 06:04:47,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137140278] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:04:47,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294043333] [2023-11-29 06:04:47,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:04:47,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:04:47,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:04:47,928 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:04:47,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 06:04:48,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:04:48,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:04:48,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:04:48,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:04:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-29 06:04:48,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:04:48,266 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-29 06:04:48,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294043333] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:04:48,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:04:48,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2023-11-29 06:04:48,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843919167] [2023-11-29 06:04:48,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:04:48,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:04:48,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:04:48,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:04:48,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:04:48,268 INFO L87 Difference]: Start difference. First operand 202 states and 229 transitions. Second operand has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 17 states have internal predecessors, (79), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 06:04:48,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:04:48,684 INFO L93 Difference]: Finished difference Result 226 states and 252 transitions. [2023-11-29 06:04:48,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 06:04:48,684 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 17 states have internal predecessors, (79), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2023-11-29 06:04:48,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:04:48,686 INFO L225 Difference]: With dead ends: 226 [2023-11-29 06:04:48,686 INFO L226 Difference]: Without dead ends: 226 [2023-11-29 06:04:48,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 118 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2023-11-29 06:04:48,686 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 291 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:04:48,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 484 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:04:48,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-11-29 06:04:48,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 202. [2023-11-29 06:04:48,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 184 states have (on average 1.1576086956521738) internal successors, (213), 191 states have internal predecessors, (213), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 06:04:48,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 227 transitions. [2023-11-29 06:04:48,690 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 227 transitions. Word has length 62 [2023-11-29 06:04:48,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:04:48,690 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 227 transitions. [2023-11-29 06:04:48,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 17 states have internal predecessors, (79), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 06:04:48,690 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 227 transitions. [2023-11-29 06:04:48,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-29 06:04:48,691 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:04:48,691 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:04:48,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-29 06:04:48,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-11-29 06:04:48,892 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 06:04:48,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:04:48,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1183324855, now seen corresponding path program 1 times [2023-11-29 06:04:48,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:04:48,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733037269] [2023-11-29 06:04:48,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:04:48,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:04:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:49,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:04:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:49,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 06:04:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:49,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 06:04:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:49,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 06:04:49,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:49,188 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 06:04:49,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:04:49,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733037269] [2023-11-29 06:04:49,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733037269] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:04:49,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492174711] [2023-11-29 06:04:49,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:04:49,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:04:49,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:04:49,190 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:04:49,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-29 06:04:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:49,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 06:04:49,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:04:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 06:04:49,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:04:49,731 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 [2023-11-29 06:04:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 06:04:49,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492174711] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:04:49,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:04:49,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2023-11-29 06:04:49,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044358477] [2023-11-29 06:04:49,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:04:49,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 06:04:49,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:04:49,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 06:04:49,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-11-29 06:04:49,819 INFO L87 Difference]: Start difference. First operand 202 states and 227 transitions. Second operand has 21 states, 20 states have (on average 6.7) internal successors, (134), 20 states have internal predecessors, (134), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-29 06:04:50,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:04:50,252 INFO L93 Difference]: Finished difference Result 209 states and 233 transitions. [2023-11-29 06:04:50,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:04:50,252 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 6.7) internal successors, (134), 20 states have internal predecessors, (134), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 63 [2023-11-29 06:04:50,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:04:50,253 INFO L225 Difference]: With dead ends: 209 [2023-11-29 06:04:50,253 INFO L226 Difference]: Without dead ends: 209 [2023-11-29 06:04:50,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2023-11-29 06:04:50,253 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 348 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:04:50,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 238 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:04:50,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-11-29 06:04:50,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 205. [2023-11-29 06:04:50,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 187 states have (on average 1.160427807486631) internal successors, (217), 194 states have internal predecessors, (217), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 06:04:50,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 231 transitions. [2023-11-29 06:04:50,257 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 231 transitions. Word has length 63 [2023-11-29 06:04:50,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:04:50,257 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 231 transitions. [2023-11-29 06:04:50,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 6.7) internal successors, (134), 20 states have internal predecessors, (134), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-29 06:04:50,258 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 231 transitions. [2023-11-29 06:04:50,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-29 06:04:50,258 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:04:50,258 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 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] [2023-11-29 06:04:50,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-29 06:04:50,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-11-29 06:04:50,459 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 06:04:50,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:04:50,459 INFO L85 PathProgramCache]: Analyzing trace with hash 224005830, now seen corresponding path program 5 times [2023-11-29 06:04:50,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:04:50,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19691424] [2023-11-29 06:04:50,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:04:50,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:04:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:50,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:04:50,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:50,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 06:04:50,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:50,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 06:04:50,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:50,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 06:04:50,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:50,598 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-29 06:04:50,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:04:50,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19691424] [2023-11-29 06:04:50,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19691424] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:04:50,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789721326] [2023-11-29 06:04:50,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:04:50,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:04:50,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:04:50,600 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:04:50,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-29 06:04:51,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-29 06:04:51,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:04:51,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 06:04:51,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:04:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 52 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 06:04:51,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:04:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 52 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 06:04:51,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789721326] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:04:51,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:04:51,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 28 [2023-11-29 06:04:51,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776846632] [2023-11-29 06:04:51,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:04:51,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 06:04:51,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:04:51,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 06:04:51,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2023-11-29 06:04:51,561 INFO L87 Difference]: Start difference. First operand 205 states and 231 transitions. Second operand has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 27 states have internal predecessors, (92), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 06:04:52,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:04:52,721 INFO L93 Difference]: Finished difference Result 266 states and 297 transitions. [2023-11-29 06:04:52,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 06:04:52,721 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 27 states have internal predecessors, (92), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 64 [2023-11-29 06:04:52,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:04:52,722 INFO L225 Difference]: With dead ends: 266 [2023-11-29 06:04:52,723 INFO L226 Difference]: Without dead ends: 266 [2023-11-29 06:04:52,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 114 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=506, Invalid=2356, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 06:04:52,723 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 416 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 06:04:52,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 981 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1270 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 06:04:52,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-11-29 06:04:52,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 205. [2023-11-29 06:04:52,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 187 states have (on average 1.1550802139037433) internal successors, (216), 194 states have internal predecessors, (216), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 06:04:52,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 230 transitions. [2023-11-29 06:04:52,728 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 230 transitions. Word has length 64 [2023-11-29 06:04:52,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:04:52,728 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 230 transitions. [2023-11-29 06:04:52,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 27 states have internal predecessors, (92), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 06:04:52,729 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 230 transitions. [2023-11-29 06:04:52,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-29 06:04:52,729 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:04:52,730 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:04:52,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-29 06:04:52,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:04:52,930 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 06:04:52,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:04:52,931 INFO L85 PathProgramCache]: Analyzing trace with hash -991091408, now seen corresponding path program 2 times [2023-11-29 06:04:52,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:04:52,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206022403] [2023-11-29 06:04:52,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:04:52,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:04:52,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:53,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:04:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:53,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 06:04:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:53,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 06:04:53,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:53,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 06:04:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 06:04:53,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:04:53,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206022403] [2023-11-29 06:04:53,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206022403] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:04:53,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126698261] [2023-11-29 06:04:53,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:04:53,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:04:53,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:04:53,207 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:04:53,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-29 06:04:53,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:04:53,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:04:53,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:04:53,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:04:53,471 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 06:04:53,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:04:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 06:04:53,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126698261] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:04:53,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:04:53,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 16 [2023-11-29 06:04:53,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586612671] [2023-11-29 06:04:53,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:04:53,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 06:04:53,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:04:53,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 06:04:53,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-11-29 06:04:53,560 INFO L87 Difference]: Start difference. First operand 205 states and 230 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 15 states have internal predecessors, (78), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 06:04:53,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:04:53,739 INFO L93 Difference]: Finished difference Result 221 states and 245 transitions. [2023-11-29 06:04:53,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:04:53,739 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 15 states have internal predecessors, (78), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 65 [2023-11-29 06:04:53,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:04:53,740 INFO L225 Difference]: With dead ends: 221 [2023-11-29 06:04:53,740 INFO L226 Difference]: Without dead ends: 209 [2023-11-29 06:04:53,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 128 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-11-29 06:04:53,741 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 67 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:04:53,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 279 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:04:53,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-11-29 06:04:53,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 203. [2023-11-29 06:04:53,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 185 states have (on average 1.1567567567567567) internal successors, (214), 192 states have internal predecessors, (214), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 06:04:53,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 228 transitions. [2023-11-29 06:04:53,744 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 228 transitions. Word has length 65 [2023-11-29 06:04:53,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:04:53,744 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 228 transitions. [2023-11-29 06:04:53,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 15 states have internal predecessors, (78), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 06:04:53,745 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 228 transitions. [2023-11-29 06:04:53,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-29 06:04:53,745 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:04:53,745 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:04:53,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-29 06:04:53,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:04:53,946 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 06:04:53,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:04:53,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1005031358, now seen corresponding path program 2 times [2023-11-29 06:04:53,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:04:53,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511628075] [2023-11-29 06:04:53,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:04:53,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:04:53,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:54,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:04:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:54,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 06:04:54,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:54,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 06:04:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:54,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 06:04:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 06:04:54,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:04:54,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511628075] [2023-11-29 06:04:54,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511628075] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:04:54,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44397401] [2023-11-29 06:04:54,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:04:54,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:04:54,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:04:54,158 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:04:54,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-29 06:04:54,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:04:54,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:04:54,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 06:04:54,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:04:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 06:04:54,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:04:54,524 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 06:04:54,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44397401] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:04:54,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:04:54,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 19 [2023-11-29 06:04:54,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349678503] [2023-11-29 06:04:54,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:04:54,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 06:04:54,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:04:54,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 06:04:54,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:04:54,526 INFO L87 Difference]: Start difference. First operand 203 states and 228 transitions. Second operand has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 18 states have internal predecessors, (88), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 06:04:54,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:04:54,797 INFO L93 Difference]: Finished difference Result 186 states and 207 transitions. [2023-11-29 06:04:54,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 06:04:54,798 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 18 states have internal predecessors, (88), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 66 [2023-11-29 06:04:54,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:04:54,799 INFO L225 Difference]: With dead ends: 186 [2023-11-29 06:04:54,799 INFO L226 Difference]: Without dead ends: 151 [2023-11-29 06:04:54,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2023-11-29 06:04:54,799 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 52 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:04:54,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 381 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:04:54,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-29 06:04:54,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2023-11-29 06:04:54,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 135 states have (on average 1.1777777777777778) internal successors, (159), 142 states have internal predecessors, (159), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 06:04:54,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 167 transitions. [2023-11-29 06:04:54,802 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 167 transitions. Word has length 66 [2023-11-29 06:04:54,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:04:54,802 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 167 transitions. [2023-11-29 06:04:54,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 18 states have internal predecessors, (88), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 06:04:54,803 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 167 transitions. [2023-11-29 06:04:54,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 06:04:54,803 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:04:54,803 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 4, 4, 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] [2023-11-29 06:04:54,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-11-29 06:04:55,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:04:55,004 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 06:04:55,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:04:55,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1630637803, now seen corresponding path program 6 times [2023-11-29 06:04:55,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:04:55,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960442226] [2023-11-29 06:04:55,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:04:55,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:04:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:55,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:04:55,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:55,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 06:04:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:55,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 06:04:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:55,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 06:04:55,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:04:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-29 06:04:55,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:04:55,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960442226] [2023-11-29 06:04:55,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960442226] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:04:55,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142455496] [2023-11-29 06:04:55,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:04:55,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:04:55,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:04:55,317 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:04:55,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-29 06:04:55,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 06:04:55,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:04:55,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-29 06:04:55,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:04:55,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:04:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-11-29 06:04:58,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:04:59,592 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 54 treesize of output 50 [2023-11-29 06:04:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-29 06:04:59,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142455496] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:04:59,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:04:59,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 42 [2023-11-29 06:04:59,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635966540] [2023-11-29 06:04:59,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:04:59,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 06:04:59,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:04:59,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 06:04:59,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 06:04:59,889 INFO L87 Difference]: Start difference. First operand 150 states and 167 transitions. Second operand has 42 states, 42 states have (on average 2.4285714285714284) internal successors, (102), 41 states have internal predecessors, (102), 8 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-11-29 06:05:13,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:05:13,514 INFO L93 Difference]: Finished difference Result 189 states and 211 transitions. [2023-11-29 06:05:13,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-29 06:05:13,515 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4285714285714284) internal successors, (102), 41 states have internal predecessors, (102), 8 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 68 [2023-11-29 06:05:13,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:05:13,516 INFO L225 Difference]: With dead ends: 189 [2023-11-29 06:05:13,516 INFO L226 Difference]: Without dead ends: 189 [2023-11-29 06:05:13,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1630 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=1707, Invalid=6665, Unknown=0, NotChecked=0, Total=8372 [2023-11-29 06:05:13,517 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1388 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1389 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:05:13,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1389 Valid, 240 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 06:05:13,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-11-29 06:05:13,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 167. [2023-11-29 06:05:13,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 152 states have (on average 1.1907894736842106) internal successors, (181), 159 states have internal predecessors, (181), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 06:05:13,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 189 transitions. [2023-11-29 06:05:13,521 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 189 transitions. Word has length 68 [2023-11-29 06:05:13,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:05:13,521 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 189 transitions. [2023-11-29 06:05:13,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.4285714285714284) internal successors, (102), 41 states have internal predecessors, (102), 8 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-11-29 06:05:13,521 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 189 transitions. [2023-11-29 06:05:13,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-29 06:05:13,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:05:13,521 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:05:13,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-11-29 06:05:13,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:05:13,722 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 06:05:13,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:05:13,722 INFO L85 PathProgramCache]: Analyzing trace with hash -525249783, now seen corresponding path program 3 times [2023-11-29 06:05:13,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:05:13,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420327338] [2023-11-29 06:05:13,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:05:13,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:05:13,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:14,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:05:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:14,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 06:05:14,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:14,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 06:05:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:14,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 06:05:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:14,124 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 06:05:14,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:05:14,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420327338] [2023-11-29 06:05:14,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420327338] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:05:14,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870834952] [2023-11-29 06:05:14,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:05:14,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:05:14,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:05:14,125 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:05:14,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-29 06:05:14,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 06:05:14,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:05:14,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:05:14,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:05:14,391 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-29 06:05:14,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:05:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-29 06:05:14,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870834952] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:05:14,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:05:14,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6, 6] total 27 [2023-11-29 06:05:14,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425383962] [2023-11-29 06:05:14,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:05:14,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 06:05:14,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:05:14,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 06:05:14,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2023-11-29 06:05:14,705 INFO L87 Difference]: Start difference. First operand 167 states and 189 transitions. Second operand has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 26 states have internal predecessors, (90), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 06:05:15,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:05:15,981 INFO L93 Difference]: Finished difference Result 216 states and 245 transitions. [2023-11-29 06:05:15,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 06:05:15,982 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 26 states have internal predecessors, (90), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 69 [2023-11-29 06:05:15,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:05:15,983 INFO L225 Difference]: With dead ends: 216 [2023-11-29 06:05:15,983 INFO L226 Difference]: Without dead ends: 216 [2023-11-29 06:05:15,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=439, Invalid=2317, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 06:05:15,984 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 195 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 06:05:15,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 325 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 06:05:15,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-11-29 06:05:15,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 170. [2023-11-29 06:05:15,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 158 states have (on average 1.1708860759493671) internal successors, (185), 162 states have internal predecessors, (185), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 06:05:15,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 193 transitions. [2023-11-29 06:05:15,986 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 193 transitions. Word has length 69 [2023-11-29 06:05:15,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:05:15,987 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 193 transitions. [2023-11-29 06:05:15,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 26 states have internal predecessors, (90), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 06:05:15,987 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 193 transitions. [2023-11-29 06:05:15,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-29 06:05:15,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:05:15,988 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:05:15,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-11-29 06:05:16,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:05:16,188 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 06:05:16,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:05:16,188 INFO L85 PathProgramCache]: Analyzing trace with hash 552446613, now seen corresponding path program 3 times [2023-11-29 06:05:16,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:05:16,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223434182] [2023-11-29 06:05:16,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:05:16,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:05:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:16,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:05:16,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:16,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 06:05:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:16,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 06:05:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:16,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 06:05:16,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-29 06:05:16,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:05:16,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223434182] [2023-11-29 06:05:16,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223434182] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:05:16,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901350568] [2023-11-29 06:05:16,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:05:16,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:05:16,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:05:16,504 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:05:16,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-29 06:05:16,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:05:16,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:05:16,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-29 06:05:16,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:05:16,935 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 16 treesize of output 12 [2023-11-29 06:05:17,231 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:05:17,232 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 25 treesize of output 17 [2023-11-29 06:05:17,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 06:05:17,922 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 06:05:17,924 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:05:17,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2023-11-29 06:05:17,953 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-29 06:05:17,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:05:18,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2023-11-29 06:05:18,668 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 97 treesize of output 95 [2023-11-29 06:05:18,676 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 107 treesize of output 97 [2023-11-29 06:05:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-29 06:05:19,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901350568] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:05:19,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:05:19,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 19] total 47 [2023-11-29 06:05:19,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321747450] [2023-11-29 06:05:19,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:05:19,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 06:05:19,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:05:19,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 06:05:19,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1961, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 06:05:19,485 INFO L87 Difference]: Start difference. First operand 170 states and 193 transitions. Second operand has 47 states, 47 states have (on average 2.4468085106382977) internal successors, (115), 46 states have internal predecessors, (115), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 06:05:22,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:05:22,009 INFO L93 Difference]: Finished difference Result 212 states and 240 transitions. [2023-11-29 06:05:22,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 06:05:22,009 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.4468085106382977) internal successors, (115), 46 states have internal predecessors, (115), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 75 [2023-11-29 06:05:22,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:05:22,010 INFO L225 Difference]: With dead ends: 212 [2023-11-29 06:05:22,010 INFO L226 Difference]: Without dead ends: 212 [2023-11-29 06:05:22,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=648, Invalid=4182, Unknown=0, NotChecked=0, Total=4830 [2023-11-29 06:05:22,011 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 375 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:05:22,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 484 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1456 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 06:05:22,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-11-29 06:05:22,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 177. [2023-11-29 06:05:22,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 165 states have (on average 1.1696969696969697) internal successors, (193), 169 states have internal predecessors, (193), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 06:05:22,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 201 transitions. [2023-11-29 06:05:22,015 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 201 transitions. Word has length 75 [2023-11-29 06:05:22,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:05:22,015 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 201 transitions. [2023-11-29 06:05:22,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.4468085106382977) internal successors, (115), 46 states have internal predecessors, (115), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 06:05:22,016 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 201 transitions. [2023-11-29 06:05:22,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-29 06:05:22,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:05:22,016 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 5, 4, 4, 4, 3, 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] [2023-11-29 06:05:22,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-11-29 06:05:22,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-11-29 06:05:22,217 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 06:05:22,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:05:22,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1911930874, now seen corresponding path program 2 times [2023-11-29 06:05:22,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:05:22,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670634014] [2023-11-29 06:05:22,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:05:22,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:05:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:22,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:05:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:22,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 06:05:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:22,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 06:05:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:22,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 06:05:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 64 proven. 62 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 06:05:22,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:05:22,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670634014] [2023-11-29 06:05:22,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670634014] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:05:22,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2798562] [2023-11-29 06:05:22,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:05:22,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:05:22,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:05:22,510 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:05:22,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-29 06:05:22,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:05:22,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:05:22,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 06:05:22,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:05:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 96 proven. 37 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 06:05:22,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:05:23,117 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 96 proven. 37 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 06:05:23,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2798562] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:05:23,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:05:23,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 30 [2023-11-29 06:05:23,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220473590] [2023-11-29 06:05:23,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:05:23,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 06:05:23,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:05:23,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 06:05:23,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2023-11-29 06:05:23,119 INFO L87 Difference]: Start difference. First operand 177 states and 201 transitions. Second operand has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 29 states have internal predecessors, (104), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 06:05:23,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:05:23,831 INFO L93 Difference]: Finished difference Result 210 states and 234 transitions. [2023-11-29 06:05:23,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 06:05:23,832 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 29 states have internal predecessors, (104), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 76 [2023-11-29 06:05:23,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:05:23,833 INFO L225 Difference]: With dead ends: 210 [2023-11-29 06:05:23,833 INFO L226 Difference]: Without dead ends: 210 [2023-11-29 06:05:23,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 140 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=468, Invalid=1512, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 06:05:23,834 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 323 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 06:05:23,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 620 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 06:05:23,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-11-29 06:05:23,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 172. [2023-11-29 06:05:23,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 160 states have (on average 1.14375) internal successors, (183), 164 states have internal predecessors, (183), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 06:05:23,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 191 transitions. [2023-11-29 06:05:23,837 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 191 transitions. Word has length 76 [2023-11-29 06:05:23,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:05:23,837 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 191 transitions. [2023-11-29 06:05:23,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 29 states have internal predecessors, (104), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 06:05:23,837 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 191 transitions. [2023-11-29 06:05:23,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-29 06:05:23,837 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:05:23,838 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:05:23,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-11-29 06:05:24,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-11-29 06:05:24,038 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 06:05:24,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:05:24,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1492397574, now seen corresponding path program 4 times [2023-11-29 06:05:24,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:05:24,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416192754] [2023-11-29 06:05:24,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:05:24,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:05:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:24,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:05:24,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:24,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 06:05:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:24,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 06:05:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:24,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 06:05:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:24,275 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-29 06:05:24,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:05:24,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416192754] [2023-11-29 06:05:24,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416192754] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:05:24,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220722435] [2023-11-29 06:05:24,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:05:24,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:05:24,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:05:24,277 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:05:24,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-29 06:05:24,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:05:24,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:05:24,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 06:05:24,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:05:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-29 06:05:24,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:05:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-29 06:05:24,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220722435] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:05:24,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:05:24,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 19 [2023-11-29 06:05:24,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954975959] [2023-11-29 06:05:24,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:05:24,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 06:05:24,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:05:24,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 06:05:24,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:05:24,809 INFO L87 Difference]: Start difference. First operand 172 states and 191 transitions. Second operand has 19 states, 19 states have (on average 4.052631578947368) internal successors, (77), 18 states have internal predecessors, (77), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 06:05:25,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:05:25,113 INFO L93 Difference]: Finished difference Result 200 states and 222 transitions. [2023-11-29 06:05:25,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:05:25,113 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.052631578947368) internal successors, (77), 18 states have internal predecessors, (77), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 78 [2023-11-29 06:05:25,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:05:25,114 INFO L225 Difference]: With dead ends: 200 [2023-11-29 06:05:25,114 INFO L226 Difference]: Without dead ends: 200 [2023-11-29 06:05:25,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 151 SyntacticMatches, 8 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2023-11-29 06:05:25,115 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 235 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:05:25,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 277 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:05:25,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-11-29 06:05:25,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 178. [2023-11-29 06:05:25,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 166 states have (on average 1.144578313253012) internal successors, (190), 170 states have internal predecessors, (190), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 06:05:25,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 198 transitions. [2023-11-29 06:05:25,117 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 198 transitions. Word has length 78 [2023-11-29 06:05:25,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:05:25,118 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 198 transitions. [2023-11-29 06:05:25,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.052631578947368) internal successors, (77), 18 states have internal predecessors, (77), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 06:05:25,118 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 198 transitions. [2023-11-29 06:05:25,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-29 06:05:25,118 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:05:25,118 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:05:25,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-11-29 06:05:25,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:05:25,319 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 06:05:25,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:05:25,319 INFO L85 PathProgramCache]: Analyzing trace with hash -335174031, now seen corresponding path program 4 times [2023-11-29 06:05:25,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:05:25,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222804971] [2023-11-29 06:05:25,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:05:25,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:05:25,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:25,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:05:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:25,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 06:05:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:25,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 06:05:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:25,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 06:05:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:25,716 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 78 proven. 94 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 06:05:25,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:05:25,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222804971] [2023-11-29 06:05:25,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222804971] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:05:25,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177598154] [2023-11-29 06:05:25,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:05:25,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:05:25,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:05:25,717 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:05:25,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-29 06:05:25,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:05:25,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:05:25,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 06:05:25,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:05:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 66 proven. 96 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-29 06:05:26,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:05:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-29 06:05:26,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177598154] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:05:26,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:05:26,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 18] total 35 [2023-11-29 06:05:26,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520483239] [2023-11-29 06:05:26,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:05:26,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 06:05:26,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:05:26,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 06:05:26,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 06:05:26,347 INFO L87 Difference]: Start difference. First operand 178 states and 198 transitions. Second operand has 35 states, 35 states have (on average 3.257142857142857) internal successors, (114), 34 states have internal predecessors, (114), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 06:05:27,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:05:27,473 INFO L93 Difference]: Finished difference Result 333 states and 375 transitions. [2023-11-29 06:05:27,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 06:05:27,474 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.257142857142857) internal successors, (114), 34 states have internal predecessors, (114), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 79 [2023-11-29 06:05:27,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:05:27,476 INFO L225 Difference]: With dead ends: 333 [2023-11-29 06:05:27,476 INFO L226 Difference]: Without dead ends: 333 [2023-11-29 06:05:27,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 143 SyntacticMatches, 10 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=685, Invalid=2855, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 06:05:27,477 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 278 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 06:05:27,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 587 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 06:05:27,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-11-29 06:05:27,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 236. [2023-11-29 06:05:27,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 224 states have (on average 1.1607142857142858) internal successors, (260), 228 states have internal predecessors, (260), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 06:05:27,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 268 transitions. [2023-11-29 06:05:27,482 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 268 transitions. Word has length 79 [2023-11-29 06:05:27,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:05:27,482 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 268 transitions. [2023-11-29 06:05:27,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.257142857142857) internal successors, (114), 34 states have internal predecessors, (114), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 06:05:27,483 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 268 transitions. [2023-11-29 06:05:27,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-29 06:05:27,483 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:05:27,483 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:05:27,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-11-29 06:05:27,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:05:27,684 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 06:05:27,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:05:27,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1427076129, now seen corresponding path program 5 times [2023-11-29 06:05:27,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:05:27,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309165472] [2023-11-29 06:05:27,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:05:27,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:05:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:28,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:05:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:28,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 06:05:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:28,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 06:05:28,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:28,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 06:05:28,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 78 proven. 119 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 06:05:28,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:05:28,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309165472] [2023-11-29 06:05:28,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309165472] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:05:28,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496434397] [2023-11-29 06:05:28,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:05:28,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:05:28,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:05:28,170 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:05:28,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-29 06:05:29,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-11-29 06:05:29,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:05:29,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 06:05:29,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:05:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 44 proven. 149 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 06:05:30,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:05:31,100 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 12 proven. 181 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 06:05:31,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496434397] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:05:31,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:05:31,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 63 [2023-11-29 06:05:31,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189127080] [2023-11-29 06:05:31,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:05:31,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-11-29 06:05:31,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:05:31,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-11-29 06:05:31,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=3429, Unknown=0, NotChecked=0, Total=3906 [2023-11-29 06:05:31,102 INFO L87 Difference]: Start difference. First operand 236 states and 268 transitions. Second operand has 63 states, 63 states have (on average 2.9523809523809526) internal successors, (186), 62 states have internal predecessors, (186), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-29 06:05:34,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:05:34,797 INFO L93 Difference]: Finished difference Result 562 states and 636 transitions. [2023-11-29 06:05:34,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-11-29 06:05:34,798 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.9523809523809526) internal successors, (186), 62 states have internal predecessors, (186), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 82 [2023-11-29 06:05:34,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:05:34,800 INFO L225 Difference]: With dead ends: 562 [2023-11-29 06:05:34,801 INFO L226 Difference]: Without dead ends: 562 [2023-11-29 06:05:34,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5377 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3201, Invalid=14621, Unknown=0, NotChecked=0, Total=17822 [2023-11-29 06:05:34,802 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1283 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1851 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1283 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 1947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:05:34,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1283 Valid, 731 Invalid, 1947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1851 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 06:05:34,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2023-11-29 06:05:34,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 328. [2023-11-29 06:05:34,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 316 states have (on average 1.1677215189873418) internal successors, (369), 320 states have internal predecessors, (369), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 06:05:34,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 377 transitions. [2023-11-29 06:05:34,808 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 377 transitions. Word has length 82 [2023-11-29 06:05:34,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:05:34,808 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 377 transitions. [2023-11-29 06:05:34,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.9523809523809526) internal successors, (186), 62 states have internal predecessors, (186), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-29 06:05:34,808 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 377 transitions. [2023-11-29 06:05:34,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-29 06:05:34,809 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:05:34,809 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 6, 6, 6, 3, 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] [2023-11-29 06:05:34,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-11-29 06:05:35,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:05:35,010 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 06:05:35,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:05:35,010 INFO L85 PathProgramCache]: Analyzing trace with hash -747085862, now seen corresponding path program 3 times [2023-11-29 06:05:35,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:05:35,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234044591] [2023-11-29 06:05:35,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:05:35,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:05:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:35,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:05:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:35,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 06:05:35,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:35,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 06:05:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:35,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 06:05:35,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 57 proven. 92 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-11-29 06:05:35,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:05:35,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234044591] [2023-11-29 06:05:35,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234044591] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:05:35,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789381164] [2023-11-29 06:05:35,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:05:35,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:05:35,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:05:35,448 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:05:35,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-29 06:05:35,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:05:35,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:05:35,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 06:05:35,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:05:35,657 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 [2023-11-29 06:05:35,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 06:05:35,789 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 06:05:35,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 06:05:35,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-29 06:05:36,943 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 35 proven. 17 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-11-29 06:05:36,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:05:39,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789381164] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:05:39,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:05:39,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2023-11-29 06:05:39,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307708775] [2023-11-29 06:05:39,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:05:39,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 06:05:39,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:05:39,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 06:05:39,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 06:05:39,747 INFO L87 Difference]: Start difference. First operand 328 states and 377 transitions. Second operand has 33 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-29 06:05:44,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:05:44,744 INFO L93 Difference]: Finished difference Result 438 states and 510 transitions. [2023-11-29 06:05:44,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-29 06:05:44,744 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 84 [2023-11-29 06:05:44,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:05:44,746 INFO L225 Difference]: With dead ends: 438 [2023-11-29 06:05:44,746 INFO L226 Difference]: Without dead ends: 438 [2023-11-29 06:05:44,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1537, Invalid=5435, Unknown=0, NotChecked=0, Total=6972 [2023-11-29 06:05:44,747 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 662 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:05:44,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [664 Valid, 351 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1464 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 06:05:44,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2023-11-29 06:05:44,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 344. [2023-11-29 06:05:44,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 333 states have (on average 1.162162162162162) internal successors, (387), 336 states have internal predecessors, (387), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 06:05:44,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 395 transitions. [2023-11-29 06:05:44,752 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 395 transitions. Word has length 84 [2023-11-29 06:05:44,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:05:44,753 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 395 transitions. [2023-11-29 06:05:44,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.59375) internal successors, (83), 32 states have internal predecessors, (83), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-29 06:05:44,753 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 395 transitions. [2023-11-29 06:05:44,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-29 06:05:44,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:05:44,754 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:05:44,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-11-29 06:05:44,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:05:44,954 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 06:05:44,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:05:44,954 INFO L85 PathProgramCache]: Analyzing trace with hash 391586769, now seen corresponding path program 5 times [2023-11-29 06:05:44,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:05:44,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135338417] [2023-11-29 06:05:44,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:05:44,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:05:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:45,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:05:45,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:45,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 06:05:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:45,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 06:05:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:45,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 06:05:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:45,341 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 06:05:45,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:05:45,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135338417] [2023-11-29 06:05:45,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135338417] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:05:45,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303724897] [2023-11-29 06:05:45,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:05:45,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:05:45,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:05:45,342 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:05:45,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-29 06:05:45,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-29 06:05:45,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:05:45,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 06:05:45,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:05:46,228 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-29 06:05:46,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:05:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-29 06:05:46,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303724897] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:05:46,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:05:46,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 36 [2023-11-29 06:05:46,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347685283] [2023-11-29 06:05:46,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:05:46,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 06:05:46,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:05:46,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 06:05:46,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 06:05:46,599 INFO L87 Difference]: Start difference. First operand 344 states and 395 transitions. Second operand has 36 states, 36 states have (on average 3.5) internal successors, (126), 35 states have internal predecessors, (126), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 06:05:48,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:05:48,379 INFO L93 Difference]: Finished difference Result 434 states and 505 transitions. [2023-11-29 06:05:48,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 06:05:48,379 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.5) internal successors, (126), 35 states have internal predecessors, (126), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 84 [2023-11-29 06:05:48,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:05:48,382 INFO L225 Difference]: With dead ends: 434 [2023-11-29 06:05:48,382 INFO L226 Difference]: Without dead ends: 410 [2023-11-29 06:05:48,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=598, Invalid=3434, Unknown=0, NotChecked=0, Total=4032 [2023-11-29 06:05:48,382 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 394 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 1568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:05:48,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 610 Invalid, 1568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1535 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 06:05:48,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2023-11-29 06:05:48,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 361. [2023-11-29 06:05:48,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 350 states have (on average 1.1542857142857144) internal successors, (404), 353 states have internal predecessors, (404), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 06:05:48,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 412 transitions. [2023-11-29 06:05:48,388 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 412 transitions. Word has length 84 [2023-11-29 06:05:48,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:05:48,388 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 412 transitions. [2023-11-29 06:05:48,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.5) internal successors, (126), 35 states have internal predecessors, (126), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 06:05:48,388 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 412 transitions. [2023-11-29 06:05:48,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-29 06:05:48,389 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:05:48,389 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 6, 6, 3, 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] [2023-11-29 06:05:48,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-11-29 06:05:48,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-11-29 06:05:48,589 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 06:05:48,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:05:48,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1684825235, now seen corresponding path program 7 times [2023-11-29 06:05:48,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:05:48,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554446377] [2023-11-29 06:05:48,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:05:48,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:05:48,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:49,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:05:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:49,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 06:05:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:49,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 06:05:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:49,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 06:05:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:49,059 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 57 proven. 98 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-11-29 06:05:49,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:05:49,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554446377] [2023-11-29 06:05:49,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554446377] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:05:49,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360032051] [2023-11-29 06:05:49,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:05:49,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:05:49,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:05:49,061 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:05:49,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-11-29 06:05:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:49,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 06:05:49,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:05:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 18 proven. 73 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2023-11-29 06:05:50,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:05:50,287 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 28 treesize of output 24 [2023-11-29 06:05:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2023-11-29 06:05:50,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360032051] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:05:50,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:05:50,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 44 [2023-11-29 06:05:50,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375016325] [2023-11-29 06:05:50,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:05:50,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-29 06:05:50,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:05:50,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-29 06:05:50,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1770, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 06:05:50,694 INFO L87 Difference]: Start difference. First operand 361 states and 412 transitions. Second operand has 45 states, 44 states have (on average 3.022727272727273) internal successors, (133), 44 states have internal predecessors, (133), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-29 06:05:59,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:05:59,995 INFO L93 Difference]: Finished difference Result 766 states and 913 transitions. [2023-11-29 06:05:59,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-11-29 06:05:59,996 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 3.022727272727273) internal successors, (133), 44 states have internal predecessors, (133), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 85 [2023-11-29 06:05:59,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:05:59,999 INFO L225 Difference]: With dead ends: 766 [2023-11-29 06:05:59,999 INFO L226 Difference]: Without dead ends: 766 [2023-11-29 06:06:00,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4373 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=4942, Invalid=15938, Unknown=0, NotChecked=0, Total=20880 [2023-11-29 06:06:00,000 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 491 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 3420 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 3444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 3420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:06:00,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 813 Invalid, 3444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 3420 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-29 06:06:00,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2023-11-29 06:06:00,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 515. [2023-11-29 06:06:00,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 504 states have (on average 1.2083333333333333) internal successors, (609), 507 states have internal predecessors, (609), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 06:06:00,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 617 transitions. [2023-11-29 06:06:00,007 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 617 transitions. Word has length 85 [2023-11-29 06:06:00,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:06:00,007 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 617 transitions. [2023-11-29 06:06:00,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 3.022727272727273) internal successors, (133), 44 states have internal predecessors, (133), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-29 06:06:00,008 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 617 transitions. [2023-11-29 06:06:00,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-29 06:06:00,008 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:06:00,008 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 7, 7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:06:00,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-11-29 06:06:00,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-11-29 06:06:00,209 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 06:06:00,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:06:00,209 INFO L85 PathProgramCache]: Analyzing trace with hash 157950623, now seen corresponding path program 6 times [2023-11-29 06:06:00,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:06:00,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188801482] [2023-11-29 06:06:00,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:00,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:06:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:00,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:06:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:00,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 06:06:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:00,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 06:06:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:00,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 06:06:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 78 proven. 178 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 06:06:00,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:06:00,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188801482] [2023-11-29 06:06:00,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188801482] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:06:00,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574019491] [2023-11-29 06:06:00,751 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:06:00,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:00,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:06:00,752 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:06:00,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-11-29 06:06:01,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-29 06:06:01,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:06:01,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 06:06:01,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:06:02,469 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 [2023-11-29 06:06:04,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-11-29 06:06:05,191 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 19 proven. 46 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2023-11-29 06:06:05,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:06:06,611 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-11-29 06:06:06,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574019491] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:06:06,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:06:06,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19, 18] total 56 [2023-11-29 06:06:06,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530842381] [2023-11-29 06:06:06,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:06:06,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-29 06:06:06,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:06:06,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-29 06:06:06,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=2802, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 06:06:06,613 INFO L87 Difference]: Start difference. First operand 515 states and 617 transitions. Second operand has 56 states, 54 states have (on average 2.5185185185185186) internal successors, (136), 53 states have internal predecessors, (136), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-11-29 06:06:13,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:06:15,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:06:26,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:06:30,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:06:38,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:06:42,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:06:46,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:06:50,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:06:54,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:06:58,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:07:02,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:07:06,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:07:10,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:07:14,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:07:14,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:07:14,791 INFO L93 Difference]: Finished difference Result 1089 states and 1282 transitions. [2023-11-29 06:07:14,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2023-11-29 06:07:14,791 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 54 states have (on average 2.5185185185185186) internal successors, (136), 53 states have internal predecessors, (136), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 88 [2023-11-29 06:07:14,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:07:14,795 INFO L225 Difference]: With dead ends: 1089 [2023-11-29 06:07:14,795 INFO L226 Difference]: Without dead ends: 1024 [2023-11-29 06:07:14,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5889 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=2631, Invalid=18831, Unknown=0, NotChecked=0, Total=21462 [2023-11-29 06:07:14,796 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1185 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 65 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1187 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 2000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.7s IncrementalHoareTripleChecker+Time [2023-11-29 06:07:14,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1187 Valid, 721 Invalid, 2000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1920 Invalid, 15 Unknown, 0 Unchecked, 56.7s Time] [2023-11-29 06:07:14,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2023-11-29 06:07:14,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 562. [2023-11-29 06:07:14,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 546 states have (on average 1.1978021978021978) internal successors, (654), 549 states have internal predecessors, (654), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 06:07:14,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 668 transitions. [2023-11-29 06:07:14,805 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 668 transitions. Word has length 88 [2023-11-29 06:07:14,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:07:14,806 INFO L495 AbstractCegarLoop]: Abstraction has 562 states and 668 transitions. [2023-11-29 06:07:14,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 54 states have (on average 2.5185185185185186) internal successors, (136), 53 states have internal predecessors, (136), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-11-29 06:07:14,806 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 668 transitions. [2023-11-29 06:07:14,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-29 06:07:14,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:07:14,807 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:07:14,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-11-29 06:07:15,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e600433-54f3-4581-a039-864d9b5561ee/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-11-29 06:07:15,007 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 06:07:15,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:07:15,008 INFO L85 PathProgramCache]: Analyzing trace with hash 227951014, now seen corresponding path program 6 times [2023-11-29 06:07:15,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:07:15,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279282205] [2023-11-29 06:07:15,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:07:15,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:07:15,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat