./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_insert_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_insert_equal.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --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 43bf83586090da08f52ccb7b612d2451c8f1efe9c820d873134ac51350c022e3 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 18:18:28,200 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 18:18:28,265 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 18:18:28,270 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 18:18:28,271 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 18:18:28,300 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 18:18:28,300 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 18:18:28,301 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 18:18:28,301 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 18:18:28,301 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 18:18:28,302 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 18:18:28,302 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 18:18:28,302 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 18:18:28,303 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 18:18:28,303 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 18:18:28,305 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 18:18:28,306 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 18:18:28,308 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 18:18:28,309 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 18:18:28,309 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 18:18:28,309 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 18:18:28,309 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 18:18:28,311 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 18:18:28,311 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 18:18:28,311 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 18:18:28,311 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 18:18:28,312 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 18:18:28,312 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 18:18:28,312 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 18:18:28,312 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 18:18:28,313 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 18:18:28,313 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 18:18:28,313 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 18:18:28,313 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 18:18:28,313 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 18:18:28,313 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 18:18:28,314 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 18:18:28,314 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 18:18:28,315 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 18:18:28,316 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 18:18:28,316 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 18:18:28,316 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 18:18:28,316 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:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43bf83586090da08f52ccb7b612d2451c8f1efe9c820d873134ac51350c022e3 [2024-10-11 18:18:28,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 18:18:28,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 18:18:28,660 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 18:18:28,661 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 18:18:28,662 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 18:18:28,664 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_insert_equal.i [2024-10-11 18:18:30,082 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 18:18:30,357 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 18:18:30,358 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_insert_equal.i [2024-10-11 18:18:30,373 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/48501e5de/3d5c51bddc624d1f8266db0964d9f907/FLAG67463594f [2024-10-11 18:18:30,387 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/48501e5de/3d5c51bddc624d1f8266db0964d9f907 [2024-10-11 18:18:30,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 18:18:30,392 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 18:18:30,393 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 18:18:30,396 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 18:18:30,402 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 18:18:30,403 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 06:18:30" (1/1) ... [2024-10-11 18:18:30,404 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23ecaf01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:18:30, skipping insertion in model container [2024-10-11 18:18:30,404 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 06:18:30" (1/1) ... [2024-10-11 18:18:30,454 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 18:18:30,810 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 18:18:30,823 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 18:18:30,887 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 18:18:30,921 INFO L204 MainTranslator]: Completed translation [2024-10-11 18:18:30,922 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:18:30 WrapperNode [2024-10-11 18:18:30,922 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 18:18:30,924 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 18:18:30,924 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 18:18:30,924 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 18:18:30,931 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:18:30" (1/1) ... [2024-10-11 18:18:30,950 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:18:30" (1/1) ... [2024-10-11 18:18:30,980 INFO L138 Inliner]: procedures = 127, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 126 [2024-10-11 18:18:30,983 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 18:18:30,984 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 18:18:30,985 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 18:18:30,985 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 18:18:30,996 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:18:30" (1/1) ... [2024-10-11 18:18:30,997 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:18:30" (1/1) ... [2024-10-11 18:18:31,005 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:18:30" (1/1) ... [2024-10-11 18:18:31,037 INFO L175 MemorySlicer]: Split 16 memory accesses to 3 slices as follows [2, 9, 5]. 56 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 6 writes are split as follows [0, 5, 1]. [2024-10-11 18:18:31,037 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:18:30" (1/1) ... [2024-10-11 18:18:31,038 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:18:30" (1/1) ... [2024-10-11 18:18:31,051 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:18:30" (1/1) ... [2024-10-11 18:18:31,057 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:18:30" (1/1) ... [2024-10-11 18:18:31,059 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:18:30" (1/1) ... [2024-10-11 18:18:31,060 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:18:30" (1/1) ... [2024-10-11 18:18:31,064 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 18:18:31,068 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 18:18:31,069 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 18:18:31,069 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 18:18:31,070 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:18:30" (1/1) ... [2024-10-11 18:18:31,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 18:18:31,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:18:31,113 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 18:18:31,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 18:18:31,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 18:18:31,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 18:18:31,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-11 18:18:31,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 18:18:31,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 18:18:31,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-11 18:18:31,168 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-10-11 18:18:31,168 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-10-11 18:18:31,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 18:18:31,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 18:18:31,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-11 18:18:31,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-11 18:18:31,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-11 18:18:31,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-11 18:18:31,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-11 18:18:31,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-11 18:18:31,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-11 18:18:31,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-11 18:18:31,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-10-11 18:18:31,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-10-11 18:18:31,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-10-11 18:18:31,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 18:18:31,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 18:18:31,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-11 18:18:31,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 18:18:31,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 18:18:31,320 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 18:18:31,323 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 18:18:31,728 INFO L? ?]: Removed 96 outVars from TransFormulas that were not future-live. [2024-10-11 18:18:31,728 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 18:18:31,787 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 18:18:31,787 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-11 18:18:31,787 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 06:18:31 BoogieIcfgContainer [2024-10-11 18:18:31,788 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 18:18:31,790 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 18:18:31,790 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 18:18:31,793 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 18:18:31,794 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 06:18:30" (1/3) ... [2024-10-11 18:18:31,794 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@757eef84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 06:18:31, skipping insertion in model container [2024-10-11 18:18:31,795 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:18:30" (2/3) ... [2024-10-11 18:18:31,795 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@757eef84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 06:18:31, skipping insertion in model container [2024-10-11 18:18:31,796 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 06:18:31" (3/3) ... [2024-10-11 18:18:31,797 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_insert_equal.i [2024-10-11 18:18:31,815 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 18:18:31,816 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2024-10-11 18:18:31,870 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 18:18:31,878 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@52e3791d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 18:18:31,879 INFO L334 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2024-10-11 18:18:31,883 INFO L276 IsEmpty]: Start isEmpty. Operand has 71 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 67 states have internal predecessors, (80), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:18:31,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-11 18:18:31,891 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:18:31,892 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 18:18:31,893 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-11 18:18:31,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:18:31,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1330367128, now seen corresponding path program 1 times [2024-10-11 18:18:31,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:18:31,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622553685] [2024-10-11 18:18:31,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:31,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:18:32,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:32,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:18:32,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:18:32,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622553685] [2024-10-11 18:18:32,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622553685] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:18:32,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:18:32,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 18:18:32,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000226338] [2024-10-11 18:18:32,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:18:32,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 18:18:32,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:18:32,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 18:18:32,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 18:18:32,198 INFO L87 Difference]: Start difference. First operand has 71 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 67 states have internal predecessors, (80), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:18:32,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:18:32,288 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2024-10-11 18:18:32,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 18:18:32,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-11 18:18:32,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:18:32,299 INFO L225 Difference]: With dead ends: 68 [2024-10-11 18:18:32,299 INFO L226 Difference]: Without dead ends: 66 [2024-10-11 18:18:32,301 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 18:18:32,304 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 1 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:18:32,305 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 97 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:18:32,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-10-11 18:18:32,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-10-11 18:18:32,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 34 states have (on average 2.0) internal successors, (68), 62 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:18:32,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2024-10-11 18:18:32,347 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 6 [2024-10-11 18:18:32,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:18:32,348 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2024-10-11 18:18:32,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:18:32,348 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2024-10-11 18:18:32,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-11 18:18:32,349 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:18:32,349 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 18:18:32,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 18:18:32,350 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-11 18:18:32,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:18:32,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1330367129, now seen corresponding path program 1 times [2024-10-11 18:18:32,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:18:32,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642455905] [2024-10-11 18:18:32,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:32,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:18:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:32,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:18:32,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:18:32,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642455905] [2024-10-11 18:18:32,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642455905] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:18:32,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:18:32,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 18:18:32,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805270107] [2024-10-11 18:18:32,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:18:32,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 18:18:32,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:18:32,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 18:18:32,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 18:18:32,548 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:18:32,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:18:32,627 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2024-10-11 18:18:32,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 18:18:32,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-11 18:18:32,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:18:32,630 INFO L225 Difference]: With dead ends: 64 [2024-10-11 18:18:32,630 INFO L226 Difference]: Without dead ends: 64 [2024-10-11 18:18:32,631 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 18:18:32,632 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 1 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:18:32,633 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 99 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:18:32,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-10-11 18:18:32,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-10-11 18:18:32,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 60 states have internal predecessors, (66), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:18:32,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2024-10-11 18:18:32,644 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 6 [2024-10-11 18:18:32,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:18:32,645 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2024-10-11 18:18:32,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:18:32,645 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2024-10-11 18:18:32,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-11 18:18:32,646 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:18:32,646 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:18:32,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 18:18:32,647 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-11 18:18:32,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:18:32,651 INFO L85 PathProgramCache]: Analyzing trace with hash -654861783, now seen corresponding path program 1 times [2024-10-11 18:18:32,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:18:32,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645654799] [2024-10-11 18:18:32,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:32,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:18:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:32,797 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 18:18:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:32,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:18:32,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:18:32,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645654799] [2024-10-11 18:18:32,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645654799] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:18:32,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:18:32,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 18:18:32,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082351969] [2024-10-11 18:18:32,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:18:32,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 18:18:32,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:18:32,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 18:18:32,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-11 18:18:32,895 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:18:33,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:18:33,059 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2024-10-11 18:18:33,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 18:18:33,060 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-10-11 18:18:33,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:18:33,061 INFO L225 Difference]: With dead ends: 63 [2024-10-11 18:18:33,063 INFO L226 Difference]: Without dead ends: 63 [2024-10-11 18:18:33,063 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-11 18:18:33,064 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 1 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:18:33,066 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 211 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:18:33,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-10-11 18:18:33,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-10-11 18:18:33,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 34 states have (on average 1.911764705882353) internal successors, (65), 59 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:18:33,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2024-10-11 18:18:33,076 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 10 [2024-10-11 18:18:33,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:18:33,078 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2024-10-11 18:18:33,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:18:33,079 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2024-10-11 18:18:33,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-11 18:18:33,079 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:18:33,080 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:18:33,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 18:18:33,080 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-11 18:18:33,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:18:33,082 INFO L85 PathProgramCache]: Analyzing trace with hash -654861782, now seen corresponding path program 1 times [2024-10-11 18:18:33,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:18:33,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951028537] [2024-10-11 18:18:33,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:33,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:18:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:33,363 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 18:18:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:18:33,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:18:33,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951028537] [2024-10-11 18:18:33,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951028537] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:18:33,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:18:33,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 18:18:33,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528798822] [2024-10-11 18:18:33,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:18:33,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 18:18:33,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:18:33,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 18:18:33,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-11 18:18:33,454 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:18:33,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:18:33,612 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2024-10-11 18:18:33,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 18:18:33,615 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-10-11 18:18:33,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:18:33,616 INFO L225 Difference]: With dead ends: 62 [2024-10-11 18:18:33,616 INFO L226 Difference]: Without dead ends: 62 [2024-10-11 18:18:33,616 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-11 18:18:33,617 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 0 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:18:33,617 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 227 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:18:33,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-11 18:18:33,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-10-11 18:18:33,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 58 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:18:33,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2024-10-11 18:18:33,629 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 10 [2024-10-11 18:18:33,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:18:33,630 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2024-10-11 18:18:33,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:18:33,630 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2024-10-11 18:18:33,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-11 18:18:33,632 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:18:33,632 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:18:33,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 18:18:33,633 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-11 18:18:33,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:18:33,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1004517177, now seen corresponding path program 1 times [2024-10-11 18:18:33,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:18:33,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425420458] [2024-10-11 18:18:33,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:33,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:18:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:33,706 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-11 18:18:33,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:33,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:18:33,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:18:33,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425420458] [2024-10-11 18:18:33,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425420458] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:18:33,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:18:33,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 18:18:33,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541646839] [2024-10-11 18:18:33,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:18:33,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 18:18:33,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:18:33,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 18:18:33,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 18:18:33,722 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:18:33,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:18:33,793 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2024-10-11 18:18:33,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 18:18:33,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-10-11 18:18:33,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:18:33,795 INFO L225 Difference]: With dead ends: 66 [2024-10-11 18:18:33,795 INFO L226 Difference]: Without dead ends: 66 [2024-10-11 18:18:33,795 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 18:18:33,796 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 2 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:18:33,796 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 134 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:18:33,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-10-11 18:18:33,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2024-10-11 18:18:33,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 59 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:18:33,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2024-10-11 18:18:33,802 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 11 [2024-10-11 18:18:33,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:18:33,802 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2024-10-11 18:18:33,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 18:18:33,803 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2024-10-11 18:18:33,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-11 18:18:33,803 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:18:33,804 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:18:33,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 18:18:33,804 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-11 18:18:33,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:18:33,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1019483528, now seen corresponding path program 1 times [2024-10-11 18:18:33,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:18:33,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948571138] [2024-10-11 18:18:33,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:33,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:18:33,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:33,894 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 18:18:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:33,909 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-11 18:18:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 18:18:33,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:18:33,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948571138] [2024-10-11 18:18:33,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948571138] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:18:33,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92714534] [2024-10-11 18:18:33,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:33,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:18:33,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:18:33,926 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:18:33,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 18:18:34,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:34,048 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-11 18:18:34,056 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:18:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:18:34,101 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:18:34,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 18:18:34,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92714534] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:18:34,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:18:34,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2024-10-11 18:18:34,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262949754] [2024-10-11 18:18:34,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:18:34,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 18:18:34,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:18:34,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 18:18:34,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 18:18:34,143 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-11 18:18:34,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:18:34,225 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2024-10-11 18:18:34,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 18:18:34,226 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2024-10-11 18:18:34,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:18:34,227 INFO L225 Difference]: With dead ends: 67 [2024-10-11 18:18:34,227 INFO L226 Difference]: Without dead ends: 67 [2024-10-11 18:18:34,228 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 18:18:34,229 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 2 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:18:34,229 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 185 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:18:34,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-11 18:18:34,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-10-11 18:18:34,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 62 states have internal predecessors, (68), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:18:34,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2024-10-11 18:18:34,240 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 20 [2024-10-11 18:18:34,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:18:34,240 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2024-10-11 18:18:34,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-11 18:18:34,241 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2024-10-11 18:18:34,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-11 18:18:34,241 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:18:34,241 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:18:34,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-11 18:18:34,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:18:34,443 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-11 18:18:34,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:18:34,443 INFO L85 PathProgramCache]: Analyzing trace with hash 2097418727, now seen corresponding path program 2 times [2024-10-11 18:18:34,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:18:34,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034434007] [2024-10-11 18:18:34,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:34,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:18:34,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:34,859 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 18:18:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:34,996 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 18:18:35,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:35,074 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 18:18:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:35,164 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 18:18:35,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:18:35,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034434007] [2024-10-11 18:18:35,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034434007] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:18:35,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913545226] [2024-10-11 18:18:35,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 18:18:35,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:18:35,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:18:35,167 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:18:35,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 18:18:35,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 18:18:35,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 18:18:35,314 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-11 18:18:35,317 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:18:35,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 18:18:35,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-11 18:18:35,462 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-11 18:18:35,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-10-11 18:18:35,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-11 18:18:35,580 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-11 18:18:35,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-10-11 18:18:35,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-11 18:18:35,663 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))))) is different from true [2024-10-11 18:18:35,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 18:18:35,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-11 18:18:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 8 not checked. [2024-10-11 18:18:35,717 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:18:35,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913545226] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:18:35,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 18:18:35,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2024-10-11 18:18:35,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587198806] [2024-10-11 18:18:35,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 18:18:35,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 18:18:35,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:18:35,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 18:18:35,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=223, Unknown=1, NotChecked=30, Total=306 [2024-10-11 18:18:35,797 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 17 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-11 18:18:36,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:18:36,128 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2024-10-11 18:18:36,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 18:18:36,128 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 29 [2024-10-11 18:18:36,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:18:36,129 INFO L225 Difference]: With dead ends: 77 [2024-10-11 18:18:36,129 INFO L226 Difference]: Without dead ends: 77 [2024-10-11 18:18:36,130 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=308, Unknown=1, NotChecked=36, Total=420 [2024-10-11 18:18:36,131 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 210 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 18:18:36,131 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 222 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 306 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2024-10-11 18:18:36,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-10-11 18:18:36,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 63. [2024-10-11 18:18:36,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 58 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:18:36,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2024-10-11 18:18:36,137 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 29 [2024-10-11 18:18:36,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:18:36,138 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2024-10-11 18:18:36,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-11 18:18:36,138 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2024-10-11 18:18:36,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-11 18:18:36,139 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:18:36,139 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:18:36,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 18:18:36,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:18:36,340 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-11 18:18:36,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:18:36,341 INFO L85 PathProgramCache]: Analyzing trace with hash 2097418728, now seen corresponding path program 1 times [2024-10-11 18:18:36,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:18:36,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502395584] [2024-10-11 18:18:36,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:36,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:18:36,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:36,766 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 18:18:36,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:36,858 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 18:18:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:36,910 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 18:18:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:36,993 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-11 18:18:36,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:18:36,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502395584] [2024-10-11 18:18:36,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502395584] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:18:36,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632558244] [2024-10-11 18:18:36,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:36,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:18:36,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:18:36,996 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:18:36,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 18:18:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:37,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-11 18:18:37,145 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:18:37,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 18:18:37,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-11 18:18:37,200 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2024-10-11 18:18:37,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 18:18:37,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-11 18:18:37,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-11 18:18:37,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 18:18:37,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-11 18:18:37,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-11 18:18:37,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 18:18:37,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-11 18:18:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-11 18:18:37,405 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 18:18:37,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632558244] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:18:37,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 18:18:37,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2024-10-11 18:18:37,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752620508] [2024-10-11 18:18:37,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:18:37,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 18:18:37,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:18:37,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 18:18:37,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=103, Unknown=1, NotChecked=20, Total=156 [2024-10-11 18:18:37,407 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:18:37,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:18:37,493 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2024-10-11 18:18:37,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 18:18:37,493 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2024-10-11 18:18:37,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:18:37,494 INFO L225 Difference]: With dead ends: 64 [2024-10-11 18:18:37,494 INFO L226 Difference]: Without dead ends: 64 [2024-10-11 18:18:37,495 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=122, Unknown=1, NotChecked=22, Total=182 [2024-10-11 18:18:37,495 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 14 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:18:37,496 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 136 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 83 Unchecked, 0.1s Time] [2024-10-11 18:18:37,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-10-11 18:18:37,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2024-10-11 18:18:37,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 38 states have (on average 1.631578947368421) internal successors, (62), 56 states have internal predecessors, (62), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:18:37,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2024-10-11 18:18:37,500 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 29 [2024-10-11 18:18:37,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:18:37,500 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2024-10-11 18:18:37,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:18:37,500 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2024-10-11 18:18:37,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-11 18:18:37,501 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:18:37,501 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:18:37,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 18:18:37,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:18:37,706 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-11 18:18:37,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:18:37,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1279868691, now seen corresponding path program 1 times [2024-10-11 18:18:37,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:18:37,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527976716] [2024-10-11 18:18:37,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:37,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:18:37,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:37,918 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 18:18:37,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:37,926 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 18:18:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:37,964 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 18:18:37,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 18:18:38,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:18:38,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527976716] [2024-10-11 18:18:38,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527976716] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:18:38,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953487293] [2024-10-11 18:18:38,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:38,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:18:38,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:18:38,038 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:18:38,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 18:18:38,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:38,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-11 18:18:38,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:18:38,377 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 3 [2024-10-11 18:18:38,397 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2024-10-11 18:18:38,423 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-10-11 18:18:38,424 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 [2024-10-11 18:18:38,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-11 18:18:38,484 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 18:18:38,484 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 18:18:38,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953487293] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:18:38,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 18:18:38,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2024-10-11 18:18:38,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409740601] [2024-10-11 18:18:38,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:18:38,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 18:18:38,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:18:38,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 18:18:38,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=205, Unknown=1, NotChecked=28, Total=272 [2024-10-11 18:18:38,486 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:18:38,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:18:38,605 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2024-10-11 18:18:38,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 18:18:38,606 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2024-10-11 18:18:38,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:18:38,607 INFO L225 Difference]: With dead ends: 77 [2024-10-11 18:18:38,608 INFO L226 Difference]: Without dead ends: 77 [2024-10-11 18:18:38,608 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=261, Unknown=1, NotChecked=32, Total=342 [2024-10-11 18:18:38,608 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 37 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:18:38,609 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 166 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 111 Unchecked, 0.1s Time] [2024-10-11 18:18:38,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-10-11 18:18:38,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 63. [2024-10-11 18:18:38,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.65) internal successors, (66), 58 states have internal predecessors, (66), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:18:38,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2024-10-11 18:18:38,620 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 31 [2024-10-11 18:18:38,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:18:38,620 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2024-10-11 18:18:38,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:18:38,622 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2024-10-11 18:18:38,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-11 18:18:38,622 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:18:38,623 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:18:38,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 18:18:38,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-10-11 18:18:38,824 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-11 18:18:38,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:18:38,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1279868692, now seen corresponding path program 1 times [2024-10-11 18:18:38,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:18:38,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702855713] [2024-10-11 18:18:38,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:38,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:18:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:39,184 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 18:18:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:39,192 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 18:18:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:39,244 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 18:18:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 18:18:39,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:18:39,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702855713] [2024-10-11 18:18:39,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702855713] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:18:39,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949338281] [2024-10-11 18:18:39,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:39,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:18:39,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:18:39,312 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:18:39,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 18:18:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:39,621 INFO L255 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-10-11 18:18:39,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:18:39,657 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 [2024-10-11 18:18:39,841 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 3 [2024-10-11 18:18:39,846 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 3 [2024-10-11 18:18:39,890 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_insert_~head#1.base_BEFORE_CALL_4| Int)) (= 0 (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_insert_~head#1.base_BEFORE_CALL_4|) 0))) (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|))))) is different from true [2024-10-11 18:18:39,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 18:18:39,925 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 [2024-10-11 18:18:39,935 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-10-11 18:18:39,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-10-11 18:18:39,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-11 18:18:40,017 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 4 not checked. [2024-10-11 18:18:40,017 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:18:40,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949338281] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:18:40,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 18:18:40,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2024-10-11 18:18:40,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889974081] [2024-10-11 18:18:40,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 18:18:40,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-11 18:18:40,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:18:40,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-11 18:18:40,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=538, Unknown=1, NotChecked=46, Total=650 [2024-10-11 18:18:40,192 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 23 states, 18 states have (on average 2.5) internal successors, (45), 19 states have internal predecessors, (45), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-11 18:18:40,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:18:40,917 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2024-10-11 18:18:40,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-11 18:18:40,917 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 2.5) internal successors, (45), 19 states have internal predecessors, (45), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 31 [2024-10-11 18:18:40,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:18:40,918 INFO L225 Difference]: With dead ends: 82 [2024-10-11 18:18:40,918 INFO L226 Difference]: Without dead ends: 82 [2024-10-11 18:18:40,919 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=155, Invalid=1330, Unknown=1, NotChecked=74, Total=1560 [2024-10-11 18:18:40,920 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 122 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 18:18:40,920 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 450 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 520 Invalid, 0 Unknown, 85 Unchecked, 0.4s Time] [2024-10-11 18:18:40,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-10-11 18:18:40,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 68. [2024-10-11 18:18:40,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 62 states have internal predecessors, (69), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:18:40,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2024-10-11 18:18:40,929 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 31 [2024-10-11 18:18:40,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:18:40,929 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2024-10-11 18:18:40,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 2.5) internal successors, (45), 19 states have internal predecessors, (45), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-11 18:18:40,930 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2024-10-11 18:18:40,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-11 18:18:40,932 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:18:40,932 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:18:40,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 18:18:41,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 18:18:41,137 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-11 18:18:41,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:18:41,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1021222134, now seen corresponding path program 1 times [2024-10-11 18:18:41,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:18:41,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098140034] [2024-10-11 18:18:41,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:41,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:18:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:41,204 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 18:18:41,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:41,211 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 18:18:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:41,218 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 18:18:41,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:41,224 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-11 18:18:41,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:18:41,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098140034] [2024-10-11 18:18:41,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098140034] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:18:41,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:18:41,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 18:18:41,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559351555] [2024-10-11 18:18:41,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:18:41,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 18:18:41,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:18:41,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 18:18:41,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 18:18:41,227 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 18:18:41,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:18:41,304 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2024-10-11 18:18:41,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 18:18:41,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2024-10-11 18:18:41,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:18:41,305 INFO L225 Difference]: With dead ends: 69 [2024-10-11 18:18:41,305 INFO L226 Difference]: Without dead ends: 69 [2024-10-11 18:18:41,305 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 18:18:41,306 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:18:41,306 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 117 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:18:41,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-10-11 18:18:41,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-10-11 18:18:41,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 63 states have internal predecessors, (70), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:18:41,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2024-10-11 18:18:41,310 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 32 [2024-10-11 18:18:41,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:18:41,311 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2024-10-11 18:18:41,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 18:18:41,311 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2024-10-11 18:18:41,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-11 18:18:41,313 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:18:41,313 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:18:41,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-11 18:18:41,314 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-11 18:18:41,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:18:41,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1593120071, now seen corresponding path program 1 times [2024-10-11 18:18:41,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:18:41,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151271180] [2024-10-11 18:18:41,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:41,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:18:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:41,459 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 18:18:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:41,467 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 18:18:41,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:41,473 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 18:18:41,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-11 18:18:41,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:18:41,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151271180] [2024-10-11 18:18:41,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151271180] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:18:41,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:18:41,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 18:18:41,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559603014] [2024-10-11 18:18:41,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:18:41,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 18:18:41,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:18:41,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 18:18:41,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-11 18:18:41,510 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 7 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 18:18:41,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:18:41,609 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2024-10-11 18:18:41,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 18:18:41,610 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2024-10-11 18:18:41,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:18:41,610 INFO L225 Difference]: With dead ends: 68 [2024-10-11 18:18:41,610 INFO L226 Difference]: Without dead ends: 68 [2024-10-11 18:18:41,611 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-11 18:18:41,611 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:18:41,611 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 181 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:18:41,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-10-11 18:18:41,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-10-11 18:18:41,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 62 states have internal predecessors, (69), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:18:41,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2024-10-11 18:18:41,619 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 33 [2024-10-11 18:18:41,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:18:41,619 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2024-10-11 18:18:41,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 18:18:41,619 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2024-10-11 18:18:41,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-11 18:18:41,620 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:18:41,620 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:18:41,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-11 18:18:41,620 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-11 18:18:41,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:18:41,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1593120072, now seen corresponding path program 1 times [2024-10-11 18:18:41,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:18:41,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710392407] [2024-10-11 18:18:41,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:41,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:18:41,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:41,720 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 18:18:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:41,729 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 18:18:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:41,741 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 18:18:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:41,755 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-11 18:18:41,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:18:41,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710392407] [2024-10-11 18:18:41,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710392407] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:18:41,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:18:41,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 18:18:41,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353133117] [2024-10-11 18:18:41,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:18:41,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 18:18:41,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:18:41,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 18:18:41,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 18:18:41,758 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:18:41,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:18:41,826 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2024-10-11 18:18:41,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 18:18:41,826 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2024-10-11 18:18:41,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:18:41,827 INFO L225 Difference]: With dead ends: 71 [2024-10-11 18:18:41,828 INFO L226 Difference]: Without dead ends: 71 [2024-10-11 18:18:41,828 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 18:18:41,829 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 35 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:18:41,829 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 139 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:18:41,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-10-11 18:18:41,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2024-10-11 18:18:41,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 61 states have internal predecessors, (67), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:18:41,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2024-10-11 18:18:41,834 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 33 [2024-10-11 18:18:41,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:18:41,834 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2024-10-11 18:18:41,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:18:41,834 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2024-10-11 18:18:41,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-11 18:18:41,835 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:18:41,835 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:18:41,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-11 18:18:41,836 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-11 18:18:41,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:18:41,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1593281004, now seen corresponding path program 1 times [2024-10-11 18:18:41,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:18:41,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140811078] [2024-10-11 18:18:41,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:41,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:18:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:41,960 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 18:18:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:41,971 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 18:18:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:41,980 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 18:18:41,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:41,990 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-11 18:18:41,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:18:41,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140811078] [2024-10-11 18:18:41,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140811078] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:18:41,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:18:41,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 18:18:41,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177698572] [2024-10-11 18:18:41,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:18:41,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 18:18:41,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:18:41,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 18:18:41,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-11 18:18:41,992 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:18:42,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:18:42,067 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2024-10-11 18:18:42,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 18:18:42,067 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2024-10-11 18:18:42,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:18:42,068 INFO L225 Difference]: With dead ends: 68 [2024-10-11 18:18:42,068 INFO L226 Difference]: Without dead ends: 68 [2024-10-11 18:18:42,068 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-10-11 18:18:42,069 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 29 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:18:42,069 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 136 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:18:42,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-10-11 18:18:42,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2024-10-11 18:18:42,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 58 states have internal predecessors, (63), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:18:42,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2024-10-11 18:18:42,078 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 33 [2024-10-11 18:18:42,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:18:42,078 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2024-10-11 18:18:42,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:18:42,078 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2024-10-11 18:18:42,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-11 18:18:42,079 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:18:42,079 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:18:42,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-11 18:18:42,079 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-11 18:18:42,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:18:42,080 INFO L85 PathProgramCache]: Analyzing trace with hash 2147069245, now seen corresponding path program 1 times [2024-10-11 18:18:42,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:18:42,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585533426] [2024-10-11 18:18:42,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:42,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:18:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:42,177 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 18:18:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:42,184 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 18:18:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:42,191 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 18:18:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:42,197 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-11 18:18:42,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:18:42,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585533426] [2024-10-11 18:18:42,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585533426] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:18:42,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:18:42,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 18:18:42,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283738048] [2024-10-11 18:18:42,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:18:42,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 18:18:42,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:18:42,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 18:18:42,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 18:18:42,201 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 18:18:42,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:18:42,277 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2024-10-11 18:18:42,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 18:18:42,278 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2024-10-11 18:18:42,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:18:42,278 INFO L225 Difference]: With dead ends: 63 [2024-10-11 18:18:42,280 INFO L226 Difference]: Without dead ends: 63 [2024-10-11 18:18:42,280 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 18:18:42,280 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:18:42,281 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:18:42,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-10-11 18:18:42,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-10-11 18:18:42,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.441860465116279) internal successors, (62), 57 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:18:42,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2024-10-11 18:18:42,286 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 34 [2024-10-11 18:18:42,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:18:42,287 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2024-10-11 18:18:42,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 18:18:42,288 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2024-10-11 18:18:42,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-11 18:18:42,288 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:18:42,288 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:18:42,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-11 18:18:42,290 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-11 18:18:42,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:18:42,290 INFO L85 PathProgramCache]: Analyzing trace with hash 2147069246, now seen corresponding path program 1 times [2024-10-11 18:18:42,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:18:42,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121633338] [2024-10-11 18:18:42,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:42,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:18:42,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:42,512 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 18:18:42,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:42,519 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 18:18:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:42,554 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 18:18:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 18:18:42,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:18:42,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121633338] [2024-10-11 18:18:42,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121633338] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:18:42,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176802063] [2024-10-11 18:18:42,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:42,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:18:42,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:18:42,566 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:18:42,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 18:18:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:42,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 18:18:42,751 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:18:42,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-11 18:18:42,795 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-11 18:18:42,796 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 18:18:42,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176802063] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:18:42,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 18:18:42,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 13 [2024-10-11 18:18:42,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850675600] [2024-10-11 18:18:42,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:18:42,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 18:18:42,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:18:42,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 18:18:42,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-10-11 18:18:42,797 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 18:18:42,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:18:42,844 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2024-10-11 18:18:42,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 18:18:42,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2024-10-11 18:18:42,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:18:42,846 INFO L225 Difference]: With dead ends: 62 [2024-10-11 18:18:42,846 INFO L226 Difference]: Without dead ends: 62 [2024-10-11 18:18:42,846 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-10-11 18:18:42,847 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 18:18:42,847 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 114 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 18:18:42,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-11 18:18:42,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-10-11 18:18:42,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 56 states have internal predecessors, (61), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:18:42,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2024-10-11 18:18:42,850 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 34 [2024-10-11 18:18:42,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:18:42,850 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2024-10-11 18:18:42,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 18:18:42,850 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2024-10-11 18:18:42,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-11 18:18:42,851 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:18:42,851 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:18:42,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 18:18:43,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-11 18:18:43,052 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-11 18:18:43,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:18:43,053 INFO L85 PathProgramCache]: Analyzing trace with hash 2134637185, now seen corresponding path program 1 times [2024-10-11 18:18:43,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:18:43,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197145167] [2024-10-11 18:18:43,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:43,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:18:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:43,245 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 18:18:43,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:43,253 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 18:18:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:43,270 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 18:18:43,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-11 18:18:43,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:18:43,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197145167] [2024-10-11 18:18:43,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197145167] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:18:43,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:18:43,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 18:18:43,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789932488] [2024-10-11 18:18:43,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:18:43,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 18:18:43,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:18:43,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 18:18:43,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-11 18:18:43,339 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 7 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 18:18:43,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:18:43,434 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2024-10-11 18:18:43,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 18:18:43,435 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2024-10-11 18:18:43,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:18:43,435 INFO L225 Difference]: With dead ends: 61 [2024-10-11 18:18:43,435 INFO L226 Difference]: Without dead ends: 61 [2024-10-11 18:18:43,436 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-11 18:18:43,436 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:18:43,436 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 181 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:18:43,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-11 18:18:43,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-10-11 18:18:43,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 55 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:18:43,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2024-10-11 18:18:43,439 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 35 [2024-10-11 18:18:43,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:18:43,440 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2024-10-11 18:18:43,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 18:18:43,440 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2024-10-11 18:18:43,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-11 18:18:43,443 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:18:43,444 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:18:43,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-11 18:18:43,444 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-11 18:18:43,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:18:43,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1749246771, now seen corresponding path program 1 times [2024-10-11 18:18:43,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:18:43,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316200885] [2024-10-11 18:18:43,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:43,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:18:43,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:43,617 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 18:18:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:43,627 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 18:18:43,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:43,636 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 18:18:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:43,651 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-11 18:18:43,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:18:43,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316200885] [2024-10-11 18:18:43,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316200885] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:18:43,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:18:43,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 18:18:43,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973136620] [2024-10-11 18:18:43,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:18:43,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 18:18:43,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:18:43,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 18:18:43,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-11 18:18:43,657 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:18:43,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:18:43,731 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2024-10-11 18:18:43,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 18:18:43,732 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2024-10-11 18:18:43,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:18:43,732 INFO L225 Difference]: With dead ends: 60 [2024-10-11 18:18:43,732 INFO L226 Difference]: Without dead ends: 60 [2024-10-11 18:18:43,734 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-10-11 18:18:43,734 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 45 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:18:43,735 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 110 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:18:43,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-11 18:18:43,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-10-11 18:18:43,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 53 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:18:43,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2024-10-11 18:18:43,740 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 36 [2024-10-11 18:18:43,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:18:43,740 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2024-10-11 18:18:43,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:18:43,741 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2024-10-11 18:18:43,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-11 18:18:43,741 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:18:43,742 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:18:43,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-11 18:18:43,742 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-11 18:18:43,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:18:43,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1694035612, now seen corresponding path program 1 times [2024-10-11 18:18:43,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:18:43,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790917458] [2024-10-11 18:18:43,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:43,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:18:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:43,884 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 18:18:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:43,891 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 18:18:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:43,898 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 18:18:43,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-11 18:18:43,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:18:43,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790917458] [2024-10-11 18:18:43,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790917458] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:18:43,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384346536] [2024-10-11 18:18:43,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:43,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:18:43,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:18:43,913 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:18:43,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 18:18:44,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:44,156 INFO L255 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-11 18:18:44,159 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:18:44,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 18:18:44,225 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 3 [2024-10-11 18:18:44,243 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-10-11 18:18:44,271 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2024-10-11 18:18:44,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 24 [2024-10-11 18:18:44,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-11 18:18:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 4 not checked. [2024-10-11 18:18:44,288 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:18:44,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384346536] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:18:44,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 18:18:44,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 13 [2024-10-11 18:18:44,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550976901] [2024-10-11 18:18:44,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 18:18:44,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 18:18:44,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:18:44,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 18:18:44,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=156, Unknown=1, NotChecked=24, Total=210 [2024-10-11 18:18:44,351 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-11 18:18:44,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:18:44,622 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2024-10-11 18:18:44,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 18:18:44,623 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2024-10-11 18:18:44,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:18:44,624 INFO L225 Difference]: With dead ends: 75 [2024-10-11 18:18:44,624 INFO L226 Difference]: Without dead ends: 75 [2024-10-11 18:18:44,624 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=363, Unknown=1, NotChecked=38, Total=462 [2024-10-11 18:18:44,625 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 30 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 18:18:44,625 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 256 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 353 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2024-10-11 18:18:44,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-10-11 18:18:44,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 62. [2024-10-11 18:18:44,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 56 states have internal predecessors, (63), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:18:44,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2024-10-11 18:18:44,628 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 38 [2024-10-11 18:18:44,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:18:44,628 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2024-10-11 18:18:44,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-11 18:18:44,628 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2024-10-11 18:18:44,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-11 18:18:44,628 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:18:44,628 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:18:44,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-11 18:18:44,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:18:44,830 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-11 18:18:44,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:18:44,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1694035613, now seen corresponding path program 1 times [2024-10-11 18:18:44,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:18:44,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312920075] [2024-10-11 18:18:44,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:44,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:18:44,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:45,180 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 18:18:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:45,186 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 18:18:45,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:45,228 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 18:18:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:45,244 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 18:18:45,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:18:45,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312920075] [2024-10-11 18:18:45,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312920075] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:18:45,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581760947] [2024-10-11 18:18:45,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:45,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:18:45,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:18:45,248 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:18:45,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 18:18:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:45,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-11 18:18:45,502 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:18:45,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 18:18:45,668 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 3 [2024-10-11 18:18:45,672 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 3 [2024-10-11 18:18:45,844 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-10-11 18:18:45,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 21 [2024-10-11 18:18:45,864 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-10-11 18:18:45,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-10-11 18:18:46,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-11 18:18:46,055 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 18:18:46,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2024-10-11 18:18:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 18:18:46,098 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:18:46,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581760947] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:18:46,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 18:18:46,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2024-10-11 18:18:46,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031269690] [2024-10-11 18:18:46,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 18:18:46,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-11 18:18:46,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:18:46,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-11 18:18:46,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=745, Unknown=0, NotChecked=0, Total=812 [2024-10-11 18:18:46,292 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 26 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-11 18:18:47,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:18:47,207 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2024-10-11 18:18:47,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-11 18:18:47,208 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2024-10-11 18:18:47,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:18:47,209 INFO L225 Difference]: With dead ends: 76 [2024-10-11 18:18:47,209 INFO L226 Difference]: Without dead ends: 76 [2024-10-11 18:18:47,210 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=178, Invalid=1802, Unknown=0, NotChecked=0, Total=1980 [2024-10-11 18:18:47,210 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 62 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 18:18:47,211 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 567 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 18:18:47,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-10-11 18:18:47,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2024-10-11 18:18:47,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 48 states have (on average 1.3125) internal successors, (63), 57 states have internal predecessors, (63), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:18:47,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2024-10-11 18:18:47,216 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 38 [2024-10-11 18:18:47,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:18:47,216 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2024-10-11 18:18:47,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-11 18:18:47,216 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2024-10-11 18:18:47,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-11 18:18:47,217 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:18:47,217 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:18:47,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-11 18:18:47,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:18:47,422 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-11 18:18:47,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:18:47,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1841798972, now seen corresponding path program 1 times [2024-10-11 18:18:47,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:18:47,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945774093] [2024-10-11 18:18:47,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:47,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:18:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:47,619 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 18:18:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:47,625 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 18:18:47,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:47,659 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 18:18:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 18:18:47,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:18:47,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945774093] [2024-10-11 18:18:47,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945774093] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:18:47,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011169880] [2024-10-11 18:18:47,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:47,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:18:47,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:18:47,674 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:18:47,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 18:18:47,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:47,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 18:18:47,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:18:47,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 18:18:47,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-11 18:18:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-11 18:18:47,979 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 18:18:47,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011169880] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:18:47,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 18:18:47,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 15 [2024-10-11 18:18:47,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971212523] [2024-10-11 18:18:47,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:18:47,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 18:18:47,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:18:47,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 18:18:47,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2024-10-11 18:18:47,981 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:18:48,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:18:48,078 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2024-10-11 18:18:48,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 18:18:48,079 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2024-10-11 18:18:48,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:18:48,080 INFO L225 Difference]: With dead ends: 78 [2024-10-11 18:18:48,080 INFO L226 Difference]: Without dead ends: 78 [2024-10-11 18:18:48,080 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2024-10-11 18:18:48,081 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 21 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:18:48,081 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 184 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:18:48,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-10-11 18:18:48,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2024-10-11 18:18:48,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.34) internal successors, (67), 59 states have internal predecessors, (67), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:18:48,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2024-10-11 18:18:48,085 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 38 [2024-10-11 18:18:48,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:18:48,085 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2024-10-11 18:18:48,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:18:48,085 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2024-10-11 18:18:48,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-11 18:18:48,085 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:18:48,086 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:18:48,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-11 18:18:48,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:18:48,287 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-11 18:18:48,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:18:48,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1841798973, now seen corresponding path program 1 times [2024-10-11 18:18:48,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:18:48,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171908378] [2024-10-11 18:18:48,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:48,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:18:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:48,518 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 18:18:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:48,524 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 18:18:48,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:48,561 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 18:18:48,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 18:18:48,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:18:48,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171908378] [2024-10-11 18:18:48,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171908378] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:18:48,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568966132] [2024-10-11 18:18:48,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:48,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:18:48,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:18:48,576 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:18:48,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 18:18:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:48,822 INFO L255 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 18:18:48,825 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:18:48,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 18:18:48,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 18:18:48,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-10-11 18:18:48,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-10-11 18:18:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-11 18:18:48,969 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 18:18:48,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568966132] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:18:48,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 18:18:48,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 15 [2024-10-11 18:18:48,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661915805] [2024-10-11 18:18:48,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:18:48,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 18:18:48,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:18:48,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 18:18:48,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2024-10-11 18:18:48,972 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:18:49,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:18:49,085 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2024-10-11 18:18:49,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 18:18:49,086 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2024-10-11 18:18:49,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:18:49,087 INFO L225 Difference]: With dead ends: 78 [2024-10-11 18:18:49,087 INFO L226 Difference]: Without dead ends: 78 [2024-10-11 18:18:49,087 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2024-10-11 18:18:49,088 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 20 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:18:49,088 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 197 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:18:49,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-10-11 18:18:49,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2024-10-11 18:18:49,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.32) internal successors, (66), 59 states have internal predecessors, (66), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:18:49,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2024-10-11 18:18:49,093 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 38 [2024-10-11 18:18:49,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:18:49,093 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2024-10-11 18:18:49,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:18:49,094 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2024-10-11 18:18:49,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-11 18:18:49,095 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:18:49,095 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:18:49,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-11 18:18:49,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-11 18:18:49,296 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-11 18:18:49,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:18:49,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1261195971, now seen corresponding path program 1 times [2024-10-11 18:18:49,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:18:49,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869569528] [2024-10-11 18:18:49,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:49,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:18:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:49,514 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 18:18:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:49,521 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 18:18:49,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:49,554 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 18:18:49,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:49,566 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 18:18:49,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:18:49,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869569528] [2024-10-11 18:18:49,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869569528] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:18:49,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833333808] [2024-10-11 18:18:49,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:49,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:18:49,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:18:49,569 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:18:49,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 18:18:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:49,798 INFO L255 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 18:18:49,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:18:49,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 18:18:49,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-11 18:18:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-11 18:18:49,969 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 18:18:49,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833333808] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:18:49,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 18:18:49,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 19 [2024-10-11 18:18:49,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508450462] [2024-10-11 18:18:49,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:18:49,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 18:18:49,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:18:49,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 18:18:49,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2024-10-11 18:18:49,971 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 10 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:18:50,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:18:50,094 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2024-10-11 18:18:50,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 18:18:50,095 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2024-10-11 18:18:50,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:18:50,095 INFO L225 Difference]: With dead ends: 79 [2024-10-11 18:18:50,095 INFO L226 Difference]: Without dead ends: 79 [2024-10-11 18:18:50,096 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2024-10-11 18:18:50,096 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 23 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:18:50,096 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 299 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:18:50,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-10-11 18:18:50,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2024-10-11 18:18:50,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 46 states have (on average 1.326086956521739) internal successors, (61), 55 states have internal predecessors, (61), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:18:50,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2024-10-11 18:18:50,099 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 39 [2024-10-11 18:18:50,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:18:50,099 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2024-10-11 18:18:50,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:18:50,099 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2024-10-11 18:18:50,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-11 18:18:50,100 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:18:50,100 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:18:50,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-11 18:18:50,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-10-11 18:18:50,300 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-11 18:18:50,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:18:50,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1148038422, now seen corresponding path program 1 times [2024-10-11 18:18:50,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:18:50,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129546722] [2024-10-11 18:18:50,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:50,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:18:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:50,442 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 18:18:50,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:50,448 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 18:18:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:50,481 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 18:18:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-11 18:18:50,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:18:50,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129546722] [2024-10-11 18:18:50,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129546722] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:18:50,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915098906] [2024-10-11 18:18:50,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:50,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:18:50,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:18:50,495 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:18:50,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 18:18:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:50,709 INFO L255 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 18:18:50,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:18:50,755 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-11 18:18:50,755 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 18:18:50,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915098906] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:18:50,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 18:18:50,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2024-10-11 18:18:50,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214610520] [2024-10-11 18:18:50,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:18:50,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 18:18:50,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:18:50,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 18:18:50,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2024-10-11 18:18:50,757 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 18:18:50,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:18:50,786 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2024-10-11 18:18:50,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 18:18:50,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2024-10-11 18:18:50,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:18:50,788 INFO L225 Difference]: With dead ends: 71 [2024-10-11 18:18:50,788 INFO L226 Difference]: Without dead ends: 71 [2024-10-11 18:18:50,789 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2024-10-11 18:18:50,789 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 22 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 18:18:50,789 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 102 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 18:18:50,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-10-11 18:18:50,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2024-10-11 18:18:50,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 56 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:18:50,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2024-10-11 18:18:50,791 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 41 [2024-10-11 18:18:50,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:18:50,792 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2024-10-11 18:18:50,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 18:18:50,792 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2024-10-11 18:18:50,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-11 18:18:50,792 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:18:50,792 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:18:50,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-11 18:18:50,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-10-11 18:18:50,993 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-11 18:18:50,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:18:50,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1147942992, now seen corresponding path program 1 times [2024-10-11 18:18:50,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:18:50,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033283404] [2024-10-11 18:18:50,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:50,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:18:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:51,110 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 18:18:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:51,116 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 18:18:51,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:51,147 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 18:18:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:51,156 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-11 18:18:51,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:18:51,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033283404] [2024-10-11 18:18:51,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033283404] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:18:51,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965044929] [2024-10-11 18:18:51,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:18:51,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:18:51,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:18:51,159 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:18:51,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-11 18:18:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:18:51,401 INFO L255 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-11 18:18:51,402 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:18:51,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-10-11 18:18:51,466 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 18:18:51,466 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:18:51,510 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-11 18:18:51,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965044929] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:18:51,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:18:51,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 11 [2024-10-11 18:18:51,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240336673] [2024-10-11 18:18:51,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:18:51,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-11 18:18:51,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:18:51,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-11 18:18:51,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2024-10-11 18:18:51,513 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-11 18:18:55,519 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] [2024-10-11 18:18:59,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-11 18:19:03,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-11 18:19:07,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-11 18:19:11,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-11 18:19:15,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-11 18:19:19,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-11 18:19:23,689 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] [2024-10-11 18:19:23,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:19:23,749 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2024-10-11 18:19:23,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-11 18:19:23,749 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2024-10-11 18:19:23,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:19:23,750 INFO L225 Difference]: With dead ends: 93 [2024-10-11 18:19:23,750 INFO L226 Difference]: Without dead ends: 93 [2024-10-11 18:19:23,750 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-10-11 18:19:23,751 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 37 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 0 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.2s IncrementalHoareTripleChecker+Time [2024-10-11 18:19:23,751 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 375 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 233 Invalid, 8 Unknown, 0 Unchecked, 32.2s Time] [2024-10-11 18:19:23,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-10-11 18:19:23,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 65. [2024-10-11 18:19:23,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.3) internal successors, (65), 59 states have internal predecessors, (65), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:19:23,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2024-10-11 18:19:23,754 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 41 [2024-10-11 18:19:23,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:19:23,754 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2024-10-11 18:19:23,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-11 18:19:23,755 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2024-10-11 18:19:23,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-11 18:19:23,755 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:19:23,755 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:19:23,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-11 18:19:23,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:19:23,956 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-11 18:19:23,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:19:23,957 INFO L85 PathProgramCache]: Analyzing trace with hash 824722352, now seen corresponding path program 1 times [2024-10-11 18:19:23,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:19:23,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606626960] [2024-10-11 18:19:23,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:19:23,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:19:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:19:24,156 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 18:19:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:19:24,163 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 18:19:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:19:24,197 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 18:19:24,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:19:24,208 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 18:19:24,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:19:24,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606626960] [2024-10-11 18:19:24,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606626960] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:19:24,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409086983] [2024-10-11 18:19:24,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:19:24,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:19:24,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:19:24,211 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:19:24,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-11 18:19:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:19:24,451 INFO L255 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 18:19:24,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:19:24,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 18:19:24,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-10-11 18:19:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-11 18:19:24,571 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 18:19:24,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409086983] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:19:24,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 18:19:24,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 16 [2024-10-11 18:19:24,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865430226] [2024-10-11 18:19:24,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:19:24,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 18:19:24,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:19:24,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 18:19:24,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2024-10-11 18:19:24,573 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 9 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:19:24,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:19:24,670 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2024-10-11 18:19:24,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 18:19:24,671 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2024-10-11 18:19:24,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:19:24,672 INFO L225 Difference]: With dead ends: 79 [2024-10-11 18:19:24,672 INFO L226 Difference]: Without dead ends: 79 [2024-10-11 18:19:24,672 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2024-10-11 18:19:24,672 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 22 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:19:24,673 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 302 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:19:24,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-10-11 18:19:24,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2024-10-11 18:19:24,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 55 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:19:24,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2024-10-11 18:19:24,675 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 41 [2024-10-11 18:19:24,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:19:24,675 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2024-10-11 18:19:24,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 18:19:24,675 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2024-10-11 18:19:24,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-11 18:19:24,676 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:19:24,676 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:19:24,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-11 18:19:24,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-11 18:19:24,877 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-11 18:19:24,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:19:24,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1345199321, now seen corresponding path program 1 times [2024-10-11 18:19:24,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:19:24,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360185932] [2024-10-11 18:19:24,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:19:24,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:19:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:19:26,089 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 18:19:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:19:26,147 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 18:19:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:19:26,335 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 18:19:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:19:26,598 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 18:19:26,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:19:26,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360185932] [2024-10-11 18:19:26,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360185932] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:19:26,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249092068] [2024-10-11 18:19:26,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:19:26,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:19:26,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:19:26,601 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:19:26,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-11 18:19:26,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:19:26,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-10-11 18:19:26,850 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:19:26,976 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-10-11 18:19:26,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-10-11 18:19:27,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-10-11 18:19:27,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 14 [2024-10-11 18:19:27,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-11 18:19:27,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 18:19:27,379 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 50 treesize of output 39 [2024-10-11 18:19:27,402 INFO L349 Elim1Store]: treesize reduction 94, result has 36.9 percent of original size [2024-10-11 18:19:27,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 64 [2024-10-11 18:19:27,642 INFO L349 Elim1Store]: treesize reduction 35, result has 48.5 percent of original size [2024-10-11 18:19:27,642 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 1 case distinctions, treesize of input 73 treesize of output 60 [2024-10-11 18:19:27,821 INFO L349 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2024-10-11 18:19:27,821 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 2 case distinctions, treesize of input 114 treesize of output 98 [2024-10-11 18:19:27,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-11 18:19:28,025 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 164 treesize of output 116 [2024-10-11 18:19:28,037 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 18:19:28,038 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 129 treesize of output 105 [2024-10-11 18:19:28,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 51 [2024-10-11 18:19:28,493 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:19:28,493 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:19:33,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249092068] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:19:33,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 18:19:33,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 21] total 47 [2024-10-11 18:19:33,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513113610] [2024-10-11 18:19:33,085 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 18:19:33,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-11 18:19:33,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:19:33,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-11 18:19:33,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2791, Unknown=2, NotChecked=0, Total=2970 [2024-10-11 18:19:33,088 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 48 states, 40 states have (on average 1.7) internal successors, (68), 40 states have internal predecessors, (68), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-11 18:19:35,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:19:35,541 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2024-10-11 18:19:35,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-11 18:19:35,542 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 40 states have (on average 1.7) internal successors, (68), 40 states have internal predecessors, (68), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2024-10-11 18:19:35,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:19:35,542 INFO L225 Difference]: With dead ends: 89 [2024-10-11 18:19:35,542 INFO L226 Difference]: Without dead ends: 89 [2024-10-11 18:19:35,544 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=439, Invalid=5721, Unknown=2, NotChecked=0, Total=6162 [2024-10-11 18:19:35,544 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 95 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-11 18:19:35,545 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 637 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1500 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-11 18:19:35,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-10-11 18:19:35,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 69. [2024-10-11 18:19:35,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 63 states have internal predecessors, (71), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 18:19:35,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2024-10-11 18:19:35,547 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 42 [2024-10-11 18:19:35,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:19:35,547 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2024-10-11 18:19:35,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 40 states have (on average 1.7) internal successors, (68), 40 states have internal predecessors, (68), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-11 18:19:35,548 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2024-10-11 18:19:35,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-11 18:19:35,548 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:19:35,548 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:19:35,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-11 18:19:35,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-11 18:19:35,749 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-10-11 18:19:35,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:19:35,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1345199322, now seen corresponding path program 1 times [2024-10-11 18:19:35,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:19:35,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98055761] [2024-10-11 18:19:35,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:19:35,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:19:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:19:37,000 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 18:19:37,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:19:37,056 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-11 18:19:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:19:37,132 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 18:19:37,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:19:37,329 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 18:19:37,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:19:37,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98055761] [2024-10-11 18:19:37,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98055761] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:19:37,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707812577] [2024-10-11 18:19:37,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:19:37,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:19:37,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:19:37,332 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:19:37,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-11 18:19:37,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:19:37,613 INFO L255 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 106 conjuncts are in the unsatisfiable core [2024-10-11 18:19:37,617 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:19:37,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 18:19:37,949 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-11 18:19:37,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-10-11 18:19:37,977 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-10-11 18:19:37,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-10-11 18:19:38,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-10-11 18:19:38,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-11 18:19:38,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 19 [2024-10-11 18:19:38,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 3 [2024-10-11 18:19:38,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-11 18:19:38,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-11 18:19:38,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 18:19:38,632 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 69 treesize of output 52 [2024-10-11 18:19:38,650 INFO L349 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2024-10-11 18:19:38,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2024-10-11 18:19:38,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2024-10-11 18:19:38,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2024-10-11 18:19:38,980 INFO L349 Elim1Store]: treesize reduction 35, result has 48.5 percent of original size [2024-10-11 18:19:38,980 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 1 case distinctions, treesize of input 73 treesize of output 60 [2024-10-11 18:19:39,004 INFO L349 Elim1Store]: treesize reduction 51, result has 25.0 percent of original size [2024-10-11 18:19:39,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2024-10-11 18:19:39,236 INFO L349 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2024-10-11 18:19:39,236 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 2 case distinctions, treesize of input 145 treesize of output 129 [2024-10-11 18:19:39,254 INFO L349 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2024-10-11 18:19:39,255 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 2 case distinctions, treesize of input 160 treesize of output 162 [2024-10-11 18:19:39,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-11 18:19:39,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-11 18:19:39,651 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 392 treesize of output 296 [2024-10-11 18:19:39,664 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 18:19:39,665 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 309 treesize of output 253 [2024-10-11 18:19:40,031 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 18:19:40,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 232 treesize of output 166 [2024-10-11 18:19:40,048 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 18:19:40,049 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 136 treesize of output 136 [2024-10-11 18:19:41,803 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:19:41,803 INFO L311 TraceCheckSpWp]: Computing backward predicates...