./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/dll2n_append_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/dll2n_append_equal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 3a59620f668b7c0725f940bc66e10441fbb56ee9b9fb687de4bd19a3f12eaeda --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 08:02:32,752 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 08:02:32,833 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 08:02:32,840 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 08:02:32,841 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 08:02:32,860 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 08:02:32,861 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 08:02:32,861 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 08:02:32,862 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 08:02:32,862 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 08:02:32,863 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 08:02:32,863 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 08:02:32,864 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 08:02:32,864 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 08:02:32,864 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 08:02:32,865 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 08:02:32,865 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 08:02:32,865 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 08:02:32,866 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 08:02:32,866 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 08:02:32,866 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 08:02:32,867 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 08:02:32,867 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 08:02:32,868 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 08:02:32,868 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 08:02:32,868 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 08:02:32,868 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 08:02:32,869 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 08:02:32,869 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 08:02:32,869 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 08:02:32,870 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 08:02:32,870 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 08:02:32,870 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 08:02:32,871 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 08:02:32,871 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 08:02:32,871 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 08:02:32,871 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 08:02:32,872 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 08:02:32,872 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 08:02:32,872 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 08:02:32,873 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 08:02:32,873 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 08:02:32,873 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a59620f668b7c0725f940bc66e10441fbb56ee9b9fb687de4bd19a3f12eaeda [2024-11-09 08:02:33,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 08:02:33,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 08:02:33,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 08:02:33,148 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 08:02:33,148 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 08:02:33,149 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2n_append_equal.i [2024-11-09 08:02:34,638 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 08:02:34,851 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 08:02:34,852 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_append_equal.i [2024-11-09 08:02:34,867 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a717a2724/6339da3eec9443a7acafe75a42a4d02f/FLAG3d7f52a7c [2024-11-09 08:02:34,878 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a717a2724/6339da3eec9443a7acafe75a42a4d02f [2024-11-09 08:02:34,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 08:02:34,882 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 08:02:34,883 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 08:02:34,883 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 08:02:34,891 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 08:02:34,891 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:02:34" (1/1) ... [2024-11-09 08:02:34,892 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6671d40a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:02:34, skipping insertion in model container [2024-11-09 08:02:34,892 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:02:34" (1/1) ... [2024-11-09 08:02:34,931 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 08:02:35,283 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 08:02:35,296 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 08:02:35,354 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 08:02:35,398 INFO L204 MainTranslator]: Completed translation [2024-11-09 08:02:35,398 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:02:35 WrapperNode [2024-11-09 08:02:35,399 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 08:02:35,400 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 08:02:35,400 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 08:02:35,400 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 08:02:35,406 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:02:35" (1/1) ... [2024-11-09 08:02:35,424 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:02:35" (1/1) ... [2024-11-09 08:02:35,450 INFO L138 Inliner]: procedures = 127, calls = 38, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 129 [2024-11-09 08:02:35,450 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 08:02:35,451 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 08:02:35,451 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 08:02:35,451 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 08:02:35,461 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:02:35" (1/1) ... [2024-11-09 08:02:35,461 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:02:35" (1/1) ... [2024-11-09 08:02:35,464 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:02:35" (1/1) ... [2024-11-09 08:02:35,485 INFO L175 MemorySlicer]: Split 21 memory accesses to 3 slices as follows [2, 13, 6]. 62 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 9 writes are split as follows [0, 8, 1]. [2024-11-09 08:02:35,486 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:02:35" (1/1) ... [2024-11-09 08:02:35,486 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:02:35" (1/1) ... [2024-11-09 08:02:35,494 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:02:35" (1/1) ... [2024-11-09 08:02:35,497 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:02:35" (1/1) ... [2024-11-09 08:02:35,503 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:02:35" (1/1) ... [2024-11-09 08:02:35,507 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:02:35" (1/1) ... [2024-11-09 08:02:35,512 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 08:02:35,513 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 08:02:35,514 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 08:02:35,514 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 08:02:35,515 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:02:35" (1/1) ... [2024-11-09 08:02:35,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 08:02:35,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 08:02:35,547 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 08:02:35,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 08:02:35,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 08:02:35,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 08:02:35,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-09 08:02:35,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 08:02:35,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 08:02:35,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-09 08:02:35,604 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-11-09 08:02:35,604 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-11-09 08:02:35,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 08:02:35,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 08:02:35,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 08:02:35,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-09 08:02:35,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-09 08:02:35,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-09 08:02:35,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-09 08:02:35,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-09 08:02:35,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-09 08:02:35,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 08:02:35,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-09 08:02:35,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-09 08:02:35,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-09 08:02:35,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 08:02:35,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 08:02:35,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-09 08:02:35,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 08:02:35,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 08:02:35,768 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 08:02:35,770 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 08:02:36,141 INFO L? ?]: Removed 111 outVars from TransFormulas that were not future-live. [2024-11-09 08:02:36,141 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 08:02:36,157 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 08:02:36,157 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-09 08:02:36,158 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:02:36 BoogieIcfgContainer [2024-11-09 08:02:36,158 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 08:02:36,161 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 08:02:36,162 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 08:02:36,165 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 08:02:36,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:02:34" (1/3) ... [2024-11-09 08:02:36,166 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d1b730 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:02:36, skipping insertion in model container [2024-11-09 08:02:36,166 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:02:35" (2/3) ... [2024-11-09 08:02:36,166 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d1b730 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:02:36, skipping insertion in model container [2024-11-09 08:02:36,167 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:02:36" (3/3) ... [2024-11-09 08:02:36,169 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_append_equal.i [2024-11-09 08:02:36,188 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 08:02:36,189 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2024-11-09 08:02:36,238 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 08:02:36,245 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;@6276666a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 08:02:36,245 INFO L334 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2024-11-09 08:02:36,250 INFO L276 IsEmpty]: Start isEmpty. Operand has 101 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 97 states have internal predecessors, (111), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:02:36,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 08:02:36,256 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:02:36,256 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:02:36,257 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-09 08:02:36,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:02:36,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1815625687, now seen corresponding path program 1 times [2024-11-09 08:02:36,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:02:36,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531846585] [2024-11-09 08:02:36,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:02:36,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:02:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 08:02:36,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:02:36,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531846585] [2024-11-09 08:02:36,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531846585] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 08:02:36,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 08:02:36,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 08:02:36,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752734080] [2024-11-09 08:02:36,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 08:02:36,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 08:02:36,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:02:36,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 08:02:36,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 08:02:36,586 INFO L87 Difference]: Start difference. First operand has 101 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 97 states have internal predecessors, (111), 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 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 08:02:36,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:02:36,738 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2024-11-09 08:02:36,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 08:02:36,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 7 [2024-11-09 08:02:36,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:02:36,749 INFO L225 Difference]: With dead ends: 97 [2024-11-09 08:02:36,749 INFO L226 Difference]: Without dead ends: 94 [2024-11-09 08:02:36,750 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 [2024-11-09 08:02:36,754 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 3 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 08:02:36,754 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 154 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 08:02:36,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-09 08:02:36,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2024-11-09 08:02:36,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 53 states have (on average 1.830188679245283) internal successors, (97), 90 states have internal predecessors, (97), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:02:36,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2024-11-09 08:02:36,789 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 7 [2024-11-09 08:02:36,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:02:36,789 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2024-11-09 08:02:36,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 08:02:36,790 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2024-11-09 08:02:36,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 08:02:36,790 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:02:36,790 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:02:36,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 08:02:36,791 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-09 08:02:36,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:02:36,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1815625688, now seen corresponding path program 1 times [2024-11-09 08:02:36,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:02:36,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390084308] [2024-11-09 08:02:36,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:02:36,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:02:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:36,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 08:02:36,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:02:36,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390084308] [2024-11-09 08:02:36,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390084308] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 08:02:36,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 08:02:36,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 08:02:36,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328841219] [2024-11-09 08:02:36,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 08:02:36,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 08:02:36,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:02:36,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 08:02:36,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 08:02:36,976 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 08:02:37,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:02:37,077 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2024-11-09 08:02:37,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 08:02:37,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 7 [2024-11-09 08:02:37,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:02:37,079 INFO L225 Difference]: With dead ends: 91 [2024-11-09 08:02:37,080 INFO L226 Difference]: Without dead ends: 91 [2024-11-09 08:02:37,081 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 [2024-11-09 08:02:37,083 INFO L432 NwaCegarLoop]: 93 mSDtfsCounter, 3 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 08:02:37,083 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 153 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 08:02:37,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-09 08:02:37,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2024-11-09 08:02:37,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 53 states have (on average 1.7735849056603774) internal successors, (94), 87 states have internal predecessors, (94), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:02:37,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2024-11-09 08:02:37,099 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 7 [2024-11-09 08:02:37,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:02:37,100 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2024-11-09 08:02:37,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 08:02:37,100 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2024-11-09 08:02:37,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-09 08:02:37,101 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:02:37,101 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:02:37,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 08:02:37,102 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-09 08:02:37,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:02:37,104 INFO L85 PathProgramCache]: Analyzing trace with hash -751929030, now seen corresponding path program 1 times [2024-11-09 08:02:37,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:02:37,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250401941] [2024-11-09 08:02:37,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:02:37,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:02:37,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:37,341 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:02:37,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 08:02:37,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:02:37,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250401941] [2024-11-09 08:02:37,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250401941] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 08:02:37,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 08:02:37,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 08:02:37,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980938015] [2024-11-09 08:02:37,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 08:02:37,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 08:02:37,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:02:37,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 08:02:37,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 08:02:37,496 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 08:02:37,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:02:37,748 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2024-11-09 08:02:37,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 08:02:37,749 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-09 08:02:37,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:02:37,750 INFO L225 Difference]: With dead ends: 89 [2024-11-09 08:02:37,751 INFO L226 Difference]: Without dead ends: 89 [2024-11-09 08:02:37,752 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 [2024-11-09 08:02:37,753 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 7 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 08:02:37,754 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 327 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 08:02:37,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-09 08:02:37,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2024-11-09 08:02:37,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 85 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:02:37,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2024-11-09 08:02:37,763 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 14 [2024-11-09 08:02:37,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:02:37,766 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2024-11-09 08:02:37,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 08:02:37,766 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2024-11-09 08:02:37,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-09 08:02:37,768 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:02:37,768 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:02:37,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 08:02:37,768 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-09 08:02:37,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:02:37,769 INFO L85 PathProgramCache]: Analyzing trace with hash -751929031, now seen corresponding path program 1 times [2024-11-09 08:02:37,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:02:37,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007562638] [2024-11-09 08:02:37,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:02:37,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:02:37,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:37,862 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:02:37,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:37,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 08:02:37,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:02:37,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007562638] [2024-11-09 08:02:37,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007562638] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 08:02:37,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 08:02:37,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 08:02:37,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948972369] [2024-11-09 08:02:37,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 08:02:37,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 08:02:37,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:02:37,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 08:02:37,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 08:02:37,938 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 08:02:38,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:02:38,123 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2024-11-09 08:02:38,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 08:02:38,125 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-09 08:02:38,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:02:38,126 INFO L225 Difference]: With dead ends: 87 [2024-11-09 08:02:38,126 INFO L226 Difference]: Without dead ends: 87 [2024-11-09 08:02:38,126 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 [2024-11-09 08:02:38,127 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 8 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 08:02:38,130 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 311 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 08:02:38,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-09 08:02:38,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-11-09 08:02:38,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 53 states have (on average 1.6981132075471699) internal successors, (90), 83 states have internal predecessors, (90), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:02:38,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2024-11-09 08:02:38,140 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 14 [2024-11-09 08:02:38,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:02:38,141 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2024-11-09 08:02:38,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 08:02:38,141 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2024-11-09 08:02:38,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-09 08:02:38,142 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:02:38,142 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:02:38,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 08:02:38,143 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-09 08:02:38,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:02:38,144 INFO L85 PathProgramCache]: Analyzing trace with hash 852398749, now seen corresponding path program 1 times [2024-11-09 08:02:38,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:02:38,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321557384] [2024-11-09 08:02:38,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:02:38,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:02:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:38,218 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-09 08:02:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 08:02:38,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:02:38,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321557384] [2024-11-09 08:02:38,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321557384] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 08:02:38,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 08:02:38,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 08:02:38,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210114890] [2024-11-09 08:02:38,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 08:02:38,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 08:02:38,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:02:38,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 08:02:38,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 08:02:38,237 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 08:02:38,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:02:38,320 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2024-11-09 08:02:38,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 08:02:38,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 16 [2024-11-09 08:02:38,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:02:38,321 INFO L225 Difference]: With dead ends: 97 [2024-11-09 08:02:38,321 INFO L226 Difference]: Without dead ends: 97 [2024-11-09 08:02:38,322 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 08:02:38,323 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 9 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 08:02:38,323 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 218 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 08:02:38,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-09 08:02:38,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2024-11-09 08:02:38,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 54 states have (on average 1.6851851851851851) internal successors, (91), 84 states have internal predecessors, (91), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:02:38,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2024-11-09 08:02:38,336 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 16 [2024-11-09 08:02:38,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:02:38,336 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2024-11-09 08:02:38,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 08:02:38,339 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2024-11-09 08:02:38,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 08:02:38,339 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:02:38,339 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:02:38,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 08:02:38,340 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-09 08:02:38,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:02:38,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1831640667, now seen corresponding path program 1 times [2024-11-09 08:02:38,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:02:38,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077822731] [2024-11-09 08:02:38,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:02:38,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:02:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:38,429 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:02:38,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:38,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 08:02:38,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:02:38,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077822731] [2024-11-09 08:02:38,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077822731] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 08:02:38,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 08:02:38,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 08:02:38,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358585516] [2024-11-09 08:02:38,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 08:02:38,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 08:02:38,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:02:38,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 08:02:38,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 08:02:38,459 INFO L87 Difference]: Start difference. First operand 88 states and 95 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, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 08:02:38,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:02:38,545 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2024-11-09 08:02:38,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 08:02:38,545 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, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-11-09 08:02:38,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:02:38,546 INFO L225 Difference]: With dead ends: 93 [2024-11-09 08:02:38,547 INFO L226 Difference]: Without dead ends: 93 [2024-11-09 08:02:38,547 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 08:02:38,548 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 0 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 08:02:38,548 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 214 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 08:02:38,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-09 08:02:38,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2024-11-09 08:02:38,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.6379310344827587) internal successors, (95), 88 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 08:02:38,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2024-11-09 08:02:38,554 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 17 [2024-11-09 08:02:38,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:02:38,554 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2024-11-09 08:02:38,555 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, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 08:02:38,555 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2024-11-09 08:02:38,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-09 08:02:38,555 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:02:38,556 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:02:38,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 08:02:38,560 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-09 08:02:38,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:02:38,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1538315307, now seen corresponding path program 1 times [2024-11-09 08:02:38,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:02:38,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277358481] [2024-11-09 08:02:38,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:02:38,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:02:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:38,697 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:02:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:38,719 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-09 08:02:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:38,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 08:02:38,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:02:38,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277358481] [2024-11-09 08:02:38,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277358481] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:02:38,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779933966] [2024-11-09 08:02:38,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:02:38,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:02:38,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 08:02:38,737 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 08:02:38,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 08:02:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:38,885 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 08:02:38,895 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 08:02:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 08:02:38,966 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 08:02:39,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 08:02:39,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779933966] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 08:02:39,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 08:02:39,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2024-11-09 08:02:39,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348928096] [2024-11-09 08:02:39,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 08:02:39,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 08:02:39,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:02:39,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 08:02:39,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-09 08:02:39,032 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 08:02:39,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:02:39,125 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2024-11-09 08:02:39,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 08:02:39,125 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2024-11-09 08:02:39,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:02:39,126 INFO L225 Difference]: With dead ends: 95 [2024-11-09 08:02:39,126 INFO L226 Difference]: Without dead ends: 95 [2024-11-09 08:02:39,127 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-09 08:02:39,127 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 9 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 08:02:39,128 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 304 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 08:02:39,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-09 08:02:39,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-11-09 08:02:39,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 60 states have (on average 1.6166666666666667) internal successors, (97), 90 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 08:02:39,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2024-11-09 08:02:39,140 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 31 [2024-11-09 08:02:39,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:02:39,141 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2024-11-09 08:02:39,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 08:02:39,141 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2024-11-09 08:02:39,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-09 08:02:39,146 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:02:39,146 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 08:02:39,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 08:02:39,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:02:39,348 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-09 08:02:39,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:02:39,348 INFO L85 PathProgramCache]: Analyzing trace with hash 733948963, now seen corresponding path program 1 times [2024-11-09 08:02:39,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:02:39,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748587449] [2024-11-09 08:02:39,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:02:39,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:02:39,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:39,598 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:02:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:39,644 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 08:02:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 08:02:39,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:02:39,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748587449] [2024-11-09 08:02:39,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748587449] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:02:39,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625498567] [2024-11-09 08:02:39,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:02:39,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:02:39,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 08:02:39,778 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 08:02:39,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 08:02:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:39,926 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 08:02:39,928 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 08:02:39,974 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 [2024-11-09 08:02:40,076 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-09 08:02:40,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-09 08:02:40,091 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 08:02:40,092 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 08:02:40,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625498567] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:02:40,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 08:02:40,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2024-11-09 08:02:40,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143664557] [2024-11-09 08:02:40,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 08:02:40,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 08:02:40,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:02:40,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 08:02:40,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=107, Unknown=1, NotChecked=20, Total=156 [2024-11-09 08:02:40,183 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 08:02:40,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:02:40,468 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2024-11-09 08:02:40,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 08:02:40,468 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2024-11-09 08:02:40,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:02:40,469 INFO L225 Difference]: With dead ends: 94 [2024-11-09 08:02:40,469 INFO L226 Difference]: Without dead ends: 94 [2024-11-09 08:02:40,470 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=196, Unknown=1, NotChecked=28, Total=272 [2024-11-09 08:02:40,470 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 5 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 08:02:40,470 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 361 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 320 Invalid, 0 Unknown, 93 Unchecked, 0.2s Time] [2024-11-09 08:02:40,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-09 08:02:40,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2024-11-09 08:02:40,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 60 states have (on average 1.6) internal successors, (96), 89 states have internal predecessors, (96), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 08:02:40,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2024-11-09 08:02:40,481 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 32 [2024-11-09 08:02:40,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:02:40,482 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2024-11-09 08:02:40,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 08:02:40,482 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2024-11-09 08:02:40,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-09 08:02:40,483 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:02:40,483 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 08:02:40,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 08:02:40,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-09 08:02:40,688 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-09 08:02:40,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:02:40,688 INFO L85 PathProgramCache]: Analyzing trace with hash 733948964, now seen corresponding path program 1 times [2024-11-09 08:02:40,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:02:40,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405457242] [2024-11-09 08:02:40,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:02:40,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:02:40,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:41,029 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:02:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:41,118 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 08:02:41,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 08:02:41,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:02:41,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405457242] [2024-11-09 08:02:41,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405457242] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:02:41,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095394864] [2024-11-09 08:02:41,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:02:41,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:02:41,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 08:02:41,217 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 08:02:41,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 08:02:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:41,367 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 08:02:41,371 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 08:02:41,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 08:02:41,585 WARN L873 $PredicateComparison]: unable to prove that (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 [2024-11-09 08:02:41,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 08:02:41,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 08:02:41,658 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 08:02:41,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 08:02:41,683 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2024-11-09 08:02:41,684 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 08:02:41,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095394864] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:02:41,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 08:02:41,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2024-11-09 08:02:41,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568367586] [2024-11-09 08:02:41,814 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 08:02:41,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 08:02:41,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:02:41,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 08:02:41,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=294, Unknown=1, NotChecked=34, Total=380 [2024-11-09 08:02:41,816 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 14 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 08:02:42,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:02:42,244 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2024-11-09 08:02:42,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 08:02:42,244 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 14 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2024-11-09 08:02:42,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:02:42,245 INFO L225 Difference]: With dead ends: 93 [2024-11-09 08:02:42,245 INFO L226 Difference]: Without dead ends: 93 [2024-11-09 08:02:42,246 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=473, Unknown=1, NotChecked=44, Total=600 [2024-11-09 08:02:42,247 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 4 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 08:02:42,247 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 469 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 391 Invalid, 0 Unknown, 92 Unchecked, 0.3s Time] [2024-11-09 08:02:42,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-09 08:02:42,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2024-11-09 08:02:42,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.5833333333333333) internal successors, (95), 88 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 08:02:42,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2024-11-09 08:02:42,252 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 32 [2024-11-09 08:02:42,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:02:42,252 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2024-11-09 08:02:42,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 14 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 08:02:42,253 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2024-11-09 08:02:42,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 08:02:42,254 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:02:42,254 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:02:42,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 08:02:42,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:02:42,459 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-09 08:02:42,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:02:42,459 INFO L85 PathProgramCache]: Analyzing trace with hash -2007893091, now seen corresponding path program 2 times [2024-11-09 08:02:42,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:02:42,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521494971] [2024-11-09 08:02:42,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:02:42,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:02:42,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:42,585 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:02:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:42,644 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 08:02:42,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:42,658 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-11-09 08:02:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:42,669 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 08:02:42,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:02:42,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521494971] [2024-11-09 08:02:42,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521494971] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:02:42,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090740726] [2024-11-09 08:02:42,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 08:02:42,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:02:42,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 08:02:42,672 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 08:02:42,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 08:02:42,857 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 08:02:42,858 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 08:02:42,861 INFO L255 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 08:02:42,863 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 08:02:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 08:02:42,902 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 08:02:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 08:02:42,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090740726] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 08:02:42,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 08:02:42,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2024-11-09 08:02:42,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539690356] [2024-11-09 08:02:42,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 08:02:42,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 08:02:42,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:02:42,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 08:02:42,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-09 08:02:42,963 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 08:02:43,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:02:43,097 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2024-11-09 08:02:43,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 08:02:43,098 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2024-11-09 08:02:43,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:02:43,099 INFO L225 Difference]: With dead ends: 93 [2024-11-09 08:02:43,099 INFO L226 Difference]: Without dead ends: 93 [2024-11-09 08:02:43,099 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-09 08:02:43,100 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 4 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 08:02:43,101 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 515 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 08:02:43,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-09 08:02:43,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2024-11-09 08:02:43,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.5666666666666667) internal successors, (94), 88 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 08:02:43,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2024-11-09 08:02:43,106 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 46 [2024-11-09 08:02:43,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:02:43,106 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2024-11-09 08:02:43,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 08:02:43,106 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2024-11-09 08:02:43,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-09 08:02:43,107 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:02:43,107 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:02:43,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 08:02:43,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:02:43,308 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-09 08:02:43,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:02:43,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1647031573, now seen corresponding path program 1 times [2024-11-09 08:02:43,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:02:43,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691958600] [2024-11-09 08:02:43,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:02:43,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:02:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:43,603 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:02:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:43,678 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 08:02:43,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:43,749 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-09 08:02:43,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:43,819 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 08:02:43,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:02:43,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691958600] [2024-11-09 08:02:43,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691958600] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:02:43,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441240032] [2024-11-09 08:02:43,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:02:43,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:02:43,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 08:02:43,822 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 08:02:43,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 08:02:44,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:44,011 INFO L255 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 08:02:44,014 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 08:02:44,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 08:02:44,038 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 [2024-11-09 08:02:44,056 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 [2024-11-09 08:02:44,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 08:02:44,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 08:02:44,136 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 [2024-11-09 08:02:44,143 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 [2024-11-09 08:02:44,172 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-09 08:02:44,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-09 08:02:44,231 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 [2024-11-09 08:02:44,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 08:02:44,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 08:02:44,293 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 14 not checked. [2024-11-09 08:02:44,293 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 08:02:44,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441240032] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:02:44,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 08:02:44,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2024-11-09 08:02:44,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10901407] [2024-11-09 08:02:44,348 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 08:02:44,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 08:02:44,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:02:44,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 08:02:44,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=124, Unknown=2, NotChecked=46, Total=210 [2024-11-09 08:02:44,349 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand has 14 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 08:02:44,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:02:44,610 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2024-11-09 08:02:44,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 08:02:44,611 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2024-11-09 08:02:44,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:02:44,612 INFO L225 Difference]: With dead ends: 100 [2024-11-09 08:02:44,612 INFO L226 Difference]: Without dead ends: 100 [2024-11-09 08:02:44,612 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=190, Unknown=2, NotChecked=58, Total=306 [2024-11-09 08:02:44,613 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 125 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 08:02:44,613 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 216 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 234 Invalid, 0 Unknown, 186 Unchecked, 0.2s Time] [2024-11-09 08:02:44,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-09 08:02:44,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 88. [2024-11-09 08:02:44,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 60 states have (on average 1.4833333333333334) internal successors, (89), 83 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 08:02:44,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2024-11-09 08:02:44,617 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 47 [2024-11-09 08:02:44,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:02:44,618 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2024-11-09 08:02:44,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 08:02:44,618 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2024-11-09 08:02:44,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-09 08:02:44,619 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:02:44,619 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:02:44,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 08:02:44,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 08:02:44,824 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-09 08:02:44,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:02:44,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1647031574, now seen corresponding path program 1 times [2024-11-09 08:02:44,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:02:44,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405823238] [2024-11-09 08:02:44,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:02:44,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:02:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:45,269 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:02:45,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:45,374 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 08:02:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:45,430 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-09 08:02:45,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 08:02:45,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:02:45,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405823238] [2024-11-09 08:02:45,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405823238] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:02:45,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922433182] [2024-11-09 08:02:45,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:02:45,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:02:45,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 08:02:45,488 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 08:02:45,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 08:02:45,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:45,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-09 08:02:45,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 08:02:45,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 08:02:45,732 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 [2024-11-09 08:02:45,748 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 [2024-11-09 08:02:45,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 08:02:45,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 08:02:45,826 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 [2024-11-09 08:02:45,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 08:02:45,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 08:02:45,945 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 [2024-11-09 08:02:45,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 08:02:45,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 08:02:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 08:02:46,007 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 08:02:46,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922433182] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 08:02:46,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 08:02:46,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 13 [2024-11-09 08:02:46,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076120833] [2024-11-09 08:02:46,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 08:02:46,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 08:02:46,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:02:46,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 08:02:46,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=122, Unknown=1, NotChecked=22, Total=182 [2024-11-09 08:02:46,009 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand has 7 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:02:46,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:02:46,106 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2024-11-09 08:02:46,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 08:02:46,107 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 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 47 [2024-11-09 08:02:46,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:02:46,109 INFO L225 Difference]: With dead ends: 85 [2024-11-09 08:02:46,109 INFO L226 Difference]: Without dead ends: 85 [2024-11-09 08:02:46,109 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=143, Unknown=1, NotChecked=24, Total=210 [2024-11-09 08:02:46,110 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 4 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 08:02:46,110 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 198 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 112 Unchecked, 0.1s Time] [2024-11-09 08:02:46,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-09 08:02:46,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2024-11-09 08:02:46,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 80 states have internal predecessors, (86), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 08:02:46,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2024-11-09 08:02:46,117 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 47 [2024-11-09 08:02:46,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:02:46,117 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2024-11-09 08:02:46,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:02:46,118 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2024-11-09 08:02:46,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-09 08:02:46,118 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:02:46,118 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:02:46,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 08:02:46,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:02:46,319 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-09 08:02:46,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:02:46,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1283038043, now seen corresponding path program 1 times [2024-11-09 08:02:46,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:02:46,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011195350] [2024-11-09 08:02:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:02:46,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:02:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:46,638 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:02:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:46,647 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 08:02:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:46,689 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-09 08:02:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:46,764 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 08:02:46,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:02:46,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011195350] [2024-11-09 08:02:46,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011195350] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:02:46,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239038756] [2024-11-09 08:02:46,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:02:46,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:02:46,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 08:02:46,767 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 08:02:46,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 08:02:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:47,387 INFO L255 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-09 08:02:47,391 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 08:02:47,518 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 [2024-11-09 08:02:47,540 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 [2024-11-09 08:02:47,581 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2024-11-09 08:02:47,581 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 [2024-11-09 08:02:47,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-09 08:02:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 08:02:47,604 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 08:02:47,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239038756] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 08:02:47,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 08:02:47,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 20 [2024-11-09 08:02:47,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241042614] [2024-11-09 08:02:47,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 08:02:47,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 08:02:47,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:02:47,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 08:02:47,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=333, Unknown=1, NotChecked=36, Total=420 [2024-11-09 08:02:47,607 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:02:47,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:02:47,816 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2024-11-09 08:02:47,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 08:02:47,817 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 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 51 [2024-11-09 08:02:47,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:02:47,817 INFO L225 Difference]: With dead ends: 84 [2024-11-09 08:02:47,817 INFO L226 Difference]: Without dead ends: 84 [2024-11-09 08:02:47,818 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=368, Unknown=1, NotChecked=38, Total=462 [2024-11-09 08:02:47,818 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 10 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 08:02:47,819 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 362 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 288 Invalid, 0 Unknown, 154 Unchecked, 0.2s Time] [2024-11-09 08:02:47,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-09 08:02:47,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-11-09 08:02:47,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.4098360655737705) internal successors, (86), 79 states have internal predecessors, (86), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 08:02:47,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2024-11-09 08:02:47,822 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 51 [2024-11-09 08:02:47,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:02:47,823 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2024-11-09 08:02:47,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:02:47,824 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2024-11-09 08:02:47,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-09 08:02:47,825 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:02:47,825 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:02:47,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 08:02:48,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:02:48,030 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-09 08:02:48,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:02:48,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1283038044, now seen corresponding path program 1 times [2024-11-09 08:02:48,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:02:48,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608411402] [2024-11-09 08:02:48,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:02:48,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:02:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:48,618 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:02:48,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:48,629 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 08:02:48,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:48,753 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-09 08:02:48,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:48,840 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 08:02:48,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:02:48,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608411402] [2024-11-09 08:02:48,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608411402] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:02:48,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553862198] [2024-11-09 08:02:48,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:02:48,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:02:48,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 08:02:48,843 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 08:02:48,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 08:02:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:49,096 INFO L255 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-09 08:02:49,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 08:02:49,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 08:02:49,339 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 [2024-11-09 08:02:49,505 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-09 08:02:49,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 21 [2024-11-09 08:02:49,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-09 08:02:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 08:02:49,603 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 08:02:49,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553862198] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:02:49,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 08:02:49,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2024-11-09 08:02:49,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915544349] [2024-11-09 08:02:49,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 08:02:49,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 08:02:49,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:02:49,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 08:02:49,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=737, Unknown=0, NotChecked=0, Total=812 [2024-11-09 08:02:49,799 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 25 states, 23 states have (on average 3.391304347826087) internal successors, (78), 21 states have internal predecessors, (78), 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) [2024-11-09 08:02:50,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:02:50,745 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2024-11-09 08:02:50,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 08:02:50,746 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.391304347826087) internal successors, (78), 21 states have internal predecessors, (78), 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 51 [2024-11-09 08:02:50,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:02:50,747 INFO L225 Difference]: With dead ends: 98 [2024-11-09 08:02:50,747 INFO L226 Difference]: Without dead ends: 98 [2024-11-09 08:02:50,748 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=167, Invalid=1725, Unknown=0, NotChecked=0, Total=1892 [2024-11-09 08:02:50,749 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 66 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 08:02:50,749 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 747 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 08:02:50,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-09 08:02:50,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2024-11-09 08:02:50,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 71 states have (on average 1.352112676056338) internal successors, (96), 89 states have internal predecessors, (96), 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) [2024-11-09 08:02:50,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2024-11-09 08:02:50,754 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 51 [2024-11-09 08:02:50,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:02:50,754 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2024-11-09 08:02:50,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.391304347826087) internal successors, (78), 21 states have internal predecessors, (78), 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) [2024-11-09 08:02:50,755 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2024-11-09 08:02:50,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-09 08:02:50,758 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:02:50,758 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:02:50,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 08:02:50,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 08:02:50,959 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-09 08:02:50,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:02:50,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1282885176, now seen corresponding path program 1 times [2024-11-09 08:02:50,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:02:50,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921626043] [2024-11-09 08:02:50,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:02:50,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:02:50,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:51,212 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:02:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:51,220 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 08:02:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:51,264 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-09 08:02:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 08:02:51,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:02:51,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921626043] [2024-11-09 08:02:51,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921626043] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:02:51,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827964676] [2024-11-09 08:02:51,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:02:51,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:02:51,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 08:02:51,280 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 08:02:51,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 08:02:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:51,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-09 08:02:51,519 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 08:02:51,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 08:02:51,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 08:02:51,567 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 [2024-11-09 08:02:51,574 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 [2024-11-09 08:02:51,669 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-09 08:02:51,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-09 08:02:51,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 08:02:51,766 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 [2024-11-09 08:02:51,771 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 [2024-11-09 08:02:51,779 WARN L873 $PredicateComparison]: unable to prove that (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 [2024-11-09 08:02:51,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 08:02:51,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 08:02:51,823 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 08:02:51,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 08:02:51,905 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 [2024-11-09 08:02:51,931 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 [2024-11-09 08:02:51,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 08:02:51,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 08:02:52,004 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 21 not checked. [2024-11-09 08:02:52,005 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 08:02:52,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827964676] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:02:52,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 08:02:52,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2024-11-09 08:02:52,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399206862] [2024-11-09 08:02:52,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 08:02:52,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 08:02:52,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:02:52,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 08:02:52,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=366, Unknown=2, NotChecked=78, Total=506 [2024-11-09 08:02:52,102 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 16 states have internal predecessors, (80), 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) [2024-11-09 08:02:52,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:02:52,599 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2024-11-09 08:02:52,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 08:02:52,600 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 16 states have internal predecessors, (80), 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 51 [2024-11-09 08:02:52,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:02:52,600 INFO L225 Difference]: With dead ends: 92 [2024-11-09 08:02:52,601 INFO L226 Difference]: Without dead ends: 92 [2024-11-09 08:02:52,601 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=794, Unknown=2, NotChecked=118, Total=1056 [2024-11-09 08:02:52,602 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 89 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 08:02:52,602 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 513 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 561 Invalid, 0 Unknown, 154 Unchecked, 0.3s Time] [2024-11-09 08:02:52,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-09 08:02:52,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-11-09 08:02:52,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 70 states have (on average 1.3142857142857143) internal successors, (92), 86 states have internal predecessors, (92), 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) [2024-11-09 08:02:52,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2024-11-09 08:02:52,605 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 51 [2024-11-09 08:02:52,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:02:52,605 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2024-11-09 08:02:52,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 16 states have internal predecessors, (80), 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) [2024-11-09 08:02:52,606 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2024-11-09 08:02:52,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-09 08:02:52,606 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:02:52,607 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:02:52,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 08:02:52,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 08:02:52,811 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-09 08:02:52,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:02:52,812 INFO L85 PathProgramCache]: Analyzing trace with hash 2072404008, now seen corresponding path program 1 times [2024-11-09 08:02:52,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:02:52,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725530566] [2024-11-09 08:02:52,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:02:52,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:02:52,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:52,936 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:02:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:52,944 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 08:02:52,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:52,952 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-09 08:02:52,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-09 08:02:52,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:02:52,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725530566] [2024-11-09 08:02:52,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725530566] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 08:02:52,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 08:02:52,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 08:02:52,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599861387] [2024-11-09 08:02:52,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 08:02:52,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 08:02:52,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:02:52,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 08:02:52,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 08:02:52,989 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 08:02:53,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:02:53,111 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2024-11-09 08:02:53,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 08:02:53,111 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 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 54 [2024-11-09 08:02:53,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:02:53,112 INFO L225 Difference]: With dead ends: 91 [2024-11-09 08:02:53,112 INFO L226 Difference]: Without dead ends: 91 [2024-11-09 08:02:53,112 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 [2024-11-09 08:02:53,113 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 8 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 08:02:53,113 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 256 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 08:02:53,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-09 08:02:53,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2024-11-09 08:02:53,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 70 states have (on average 1.3) internal successors, (91), 85 states have internal predecessors, (91), 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) [2024-11-09 08:02:53,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2024-11-09 08:02:53,116 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 54 [2024-11-09 08:02:53,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:02:53,117 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2024-11-09 08:02:53,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 08:02:53,117 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2024-11-09 08:02:53,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-09 08:02:53,118 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:02:53,118 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:02:53,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-09 08:02:53,118 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-09 08:02:53,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:02:53,118 INFO L85 PathProgramCache]: Analyzing trace with hash 2072404009, now seen corresponding path program 1 times [2024-11-09 08:02:53,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:02:53,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787434877] [2024-11-09 08:02:53,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:02:53,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:02:53,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:53,304 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:02:53,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:53,311 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 08:02:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:53,318 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-09 08:02:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:53,377 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 08:02:53,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:02:53,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787434877] [2024-11-09 08:02:53,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787434877] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 08:02:53,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 08:02:53,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 08:02:53,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211556134] [2024-11-09 08:02:53,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 08:02:53,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 08:02:53,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:02:53,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 08:02:53,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 08:02:53,379 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 08:02:53,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:02:53,500 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2024-11-09 08:02:53,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 08:02:53,501 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 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 54 [2024-11-09 08:02:53,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:02:53,502 INFO L225 Difference]: With dead ends: 90 [2024-11-09 08:02:53,502 INFO L226 Difference]: Without dead ends: 90 [2024-11-09 08:02:53,503 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 [2024-11-09 08:02:53,503 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 7 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 08:02:53,503 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 264 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 08:02:53,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-09 08:02:53,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2024-11-09 08:02:53,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 70 states have (on average 1.2857142857142858) internal successors, (90), 84 states have internal predecessors, (90), 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) [2024-11-09 08:02:53,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2024-11-09 08:02:53,507 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 54 [2024-11-09 08:02:53,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:02:53,507 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2024-11-09 08:02:53,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 08:02:53,507 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2024-11-09 08:02:53,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-09 08:02:53,508 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:02:53,508 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:02:53,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-09 08:02:53,508 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-09 08:02:53,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:02:53,509 INFO L85 PathProgramCache]: Analyzing trace with hash -179932527, now seen corresponding path program 1 times [2024-11-09 08:02:53,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:02:53,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441124867] [2024-11-09 08:02:53,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:02:53,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:02:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:54,401 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:02:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:54,450 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 08:02:54,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:54,570 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-09 08:02:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:54,879 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 08:02:54,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:02:54,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441124867] [2024-11-09 08:02:54,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441124867] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:02:54,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875480027] [2024-11-09 08:02:54,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:02:54,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:02:54,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 08:02:54,882 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 08:02:54,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 08:02:55,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:02:55,464 INFO L255 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-11-09 08:02:55,470 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 08:02:55,631 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 08:02:55,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 08:02:55,735 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 11 treesize of output 7 [2024-11-09 08:02:55,796 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-09 08:02:55,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-11-09 08:02:55,990 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 30 treesize of output 14 [2024-11-09 08:02:55,994 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 [2024-11-09 08:02:56,173 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|node_create_~temp~0#1.base| Int)) (and (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#memory_$Pointer$#1.base| (store |c_old(#memory_$Pointer$#1.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#1.base| |node_create_~temp~0#1.base|))) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1)))) (exists ((|v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_5| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_dll_append_~head#1.base_BEFORE_CALL_5|) 0) 0))) is different from true [2024-11-09 08:02:56,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 08:02:56,202 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 38 treesize of output 27 [2024-11-09 08:02:56,227 INFO L349 Elim1Store]: treesize reduction 72, result has 37.4 percent of original size [2024-11-09 08:02:56,227 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 34 treesize of output 57 [2024-11-09 08:02:56,375 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 66 treesize of output 38 [2024-11-09 08:02:56,572 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 33 treesize of output 17 [2024-11-09 08:02:56,699 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2024-11-09 08:02:56,700 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 08:02:56,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875480027] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:02:56,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 08:02:56,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 47 [2024-11-09 08:02:56,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434953616] [2024-11-09 08:02:56,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 08:02:56,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-09 08:02:56,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:02:56,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-09 08:02:56,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2376, Unknown=1, NotChecked=98, Total=2652 [2024-11-09 08:02:56,899 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 48 states, 45 states have (on average 2.111111111111111) internal successors, (95), 42 states have internal predecessors, (95), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 08:02:58,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:02:58,494 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2024-11-09 08:02:58,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-09 08:02:58,495 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 2.111111111111111) internal successors, (95), 42 states have internal predecessors, (95), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 55 [2024-11-09 08:02:58,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:02:58,495 INFO L225 Difference]: With dead ends: 102 [2024-11-09 08:02:58,496 INFO L226 Difference]: Without dead ends: 102 [2024-11-09 08:02:58,497 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=365, Invalid=4750, Unknown=1, NotChecked=140, Total=5256 [2024-11-09 08:02:58,497 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 78 mSDsluCounter, 1081 mSDsCounter, 0 mSdLazyCounter, 1713 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 08:02:58,497 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 1134 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1713 Invalid, 0 Unknown, 110 Unchecked, 0.9s Time] [2024-11-09 08:02:58,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-09 08:02:58,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 92. [2024-11-09 08:02:58,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 72 states have (on average 1.2916666666666667) internal successors, (93), 86 states have internal predecessors, (93), 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) [2024-11-09 08:02:58,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2024-11-09 08:02:58,501 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 55 [2024-11-09 08:02:58,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:02:58,501 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2024-11-09 08:02:58,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 2.111111111111111) internal successors, (95), 42 states have internal predecessors, (95), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 08:02:58,501 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2024-11-09 08:02:58,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-09 08:02:58,501 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:02:58,502 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:02:58,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 08:02:58,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 08:02:58,707 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-09 08:02:58,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:02:58,707 INFO L85 PathProgramCache]: Analyzing trace with hash -179932526, now seen corresponding path program 1 times [2024-11-09 08:02:58,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:02:58,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960721331] [2024-11-09 08:02:58,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:02:58,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:02:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:03:00,080 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:03:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:03:00,169 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 08:03:00,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:03:00,311 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-09 08:03:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:03:00,917 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 08:03:00,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:03:00,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960721331] [2024-11-09 08:03:00,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960721331] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:03:00,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735485479] [2024-11-09 08:03:00,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:03:00,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:03:00,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 08:03:00,919 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 08:03:00,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 08:03:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:03:01,183 INFO L255 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-11-09 08:03:01,188 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 08:03:01,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 08:03:01,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 08:03:01,604 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 08:03:01,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 08:03:01,611 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 12 treesize of output 14 [2024-11-09 08:03:01,746 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 13 treesize of output 9 [2024-11-09 08:03:01,758 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 13 treesize of output 9 [2024-11-09 08:03:01,837 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2024-11-09 08:03:01,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 66 [2024-11-09 08:03:01,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2024-11-09 08:03:02,120 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 [2024-11-09 08:03:02,125 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 [2024-11-09 08:03:02,129 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 [2024-11-09 08:03:02,133 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 [2024-11-09 08:03:02,250 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= |c_#memory_$Pointer$#1.offset| (store |c_old(#memory_$Pointer$#1.offset)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#1.offset| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#memory_$Pointer$#1.base| (store |c_old(#memory_$Pointer$#1.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#1.base| |node_create_~temp~0#1.base|))))) is different from true [2024-11-09 08:03:02,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 08:03:02,289 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 [2024-11-09 08:03:02,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 08:03:02,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 08:03:02,299 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 [2024-11-09 08:03:02,329 INFO L349 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2024-11-09 08:03:02,329 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 [2024-11-09 08:03:02,336 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 [2024-11-09 08:03:02,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 51 [2024-11-09 08:03:02,422 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 50 treesize of output 34 [2024-11-09 08:03:02,532 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 31 treesize of output 13 [2024-11-09 08:03:02,537 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 9 treesize of output 3 [2024-11-09 08:03:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2024-11-09 08:03:02,679 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 08:03:03,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735485479] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:03:03,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 08:03:03,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 52 [2024-11-09 08:03:03,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528063566] [2024-11-09 08:03:03,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 08:03:03,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-09 08:03:03,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:03:03,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-09 08:03:03,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3139, Unknown=1, NotChecked=112, Total=3422 [2024-11-09 08:03:03,158 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand has 53 states, 50 states have (on average 1.88) internal successors, (94), 46 states have internal predecessors, (94), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 08:03:05,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:03:05,021 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2024-11-09 08:03:05,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 08:03:05,021 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.88) internal successors, (94), 46 states have internal predecessors, (94), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 55 [2024-11-09 08:03:05,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:03:05,023 INFO L225 Difference]: With dead ends: 97 [2024-11-09 08:03:05,023 INFO L226 Difference]: Without dead ends: 97 [2024-11-09 08:03:05,025 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=309, Invalid=5244, Unknown=1, NotChecked=146, Total=5700 [2024-11-09 08:03:05,025 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 69 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 1859 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 1961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 08:03:05,026 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 1342 Invalid, 1961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1859 Invalid, 0 Unknown, 95 Unchecked, 1.0s Time] [2024-11-09 08:03:05,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-09 08:03:05,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2024-11-09 08:03:05,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 74 states have (on average 1.2837837837837838) internal successors, (95), 88 states have internal predecessors, (95), 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) [2024-11-09 08:03:05,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2024-11-09 08:03:05,031 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 55 [2024-11-09 08:03:05,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:03:05,031 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2024-11-09 08:03:05,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.88) internal successors, (94), 46 states have internal predecessors, (94), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 08:03:05,032 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2024-11-09 08:03:05,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-09 08:03:05,032 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:03:05,032 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:03:05,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 08:03:05,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:03:05,233 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-09 08:03:05,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:03:05,233 INFO L85 PathProgramCache]: Analyzing trace with hash 818462407, now seen corresponding path program 2 times [2024-11-09 08:03:05,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:03:05,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540958316] [2024-11-09 08:03:05,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:03:05,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:03:05,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:03:07,343 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:03:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:03:07,566 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 08:03:07,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:03:07,926 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-09 08:03:07,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:03:08,452 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 08:03:08,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:03:08,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540958316] [2024-11-09 08:03:08,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540958316] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:03:08,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122731055] [2024-11-09 08:03:08,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 08:03:08,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:03:08,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 08:03:08,455 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 08:03:08,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 08:03:08,777 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 08:03:08,777 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 08:03:08,780 INFO L255 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 126 conjuncts are in the unsatisfiable core [2024-11-09 08:03:08,784 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 08:03:09,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 08:03:09,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 08:03:09,269 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 08:03:09,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-09 08:03:09,290 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 08:03:09,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-09 08:03:09,305 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 08:03:09,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 08:03:09,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 08:03:09,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 08:03:09,492 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 21 treesize of output 20 [2024-11-09 08:03:09,501 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 21 treesize of output 20 [2024-11-09 08:03:09,623 INFO L349 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2024-11-09 08:03:09,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 57 [2024-11-09 08:03:09,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2024-11-09 08:03:10,020 INFO L349 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2024-11-09 08:03:10,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 134 treesize of output 45 [2024-11-09 08:03:10,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 14 [2024-11-09 08:03:10,030 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 [2024-11-09 08:03:10,079 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#memory_$Pointer$#1.offset| (store |c_old(#memory_$Pointer$#1.offset)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#1.offset| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#memory_$Pointer$#1.base| (store |c_old(#memory_$Pointer$#1.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#1.base| |node_create_~temp~0#1.base|))))) is different from true [2024-11-09 08:03:10,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 08:03:10,117 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2024-11-09 08:03:10,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 142 treesize of output 103 [2024-11-09 08:03:10,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 08:03:10,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 08:03:10,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 54 [2024-11-09 08:03:10,154 INFO L349 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2024-11-09 08:03:10,154 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 [2024-11-09 08:03:10,307 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 139 treesize of output 103 [2024-11-09 08:03:10,311 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 107 treesize of output 75 [2024-11-09 08:03:10,760 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 6 not checked. [2024-11-09 08:03:10,760 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 08:03:11,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122731055] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:03:11,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 08:03:11,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29] total 57 [2024-11-09 08:03:11,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492839944] [2024-11-09 08:03:11,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 08:03:11,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-09 08:03:11,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:03:11,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-09 08:03:11,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3600, Unknown=1, NotChecked=120, Total=3906 [2024-11-09 08:03:11,322 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand has 57 states, 55 states have (on average 1.709090909090909) internal successors, (94), 51 states have internal predecessors, (94), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 08:03:13,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:03:13,444 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2024-11-09 08:03:13,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 08:03:13,445 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 55 states have (on average 1.709090909090909) internal successors, (94), 51 states have internal predecessors, (94), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 59 [2024-11-09 08:03:13,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:03:13,446 INFO L225 Difference]: With dead ends: 119 [2024-11-09 08:03:13,446 INFO L226 Difference]: Without dead ends: 119 [2024-11-09 08:03:13,448 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=310, Invalid=6335, Unknown=1, NotChecked=160, Total=6806 [2024-11-09 08:03:13,448 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 12 mSDsluCounter, 1606 mSDsCounter, 0 mSdLazyCounter, 1853 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 1971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 08:03:13,449 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1661 Invalid, 1971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1853 Invalid, 0 Unknown, 111 Unchecked, 1.1s Time] [2024-11-09 08:03:13,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-09 08:03:13,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2024-11-09 08:03:13,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 94 states have (on average 1.2446808510638299) internal successors, (117), 108 states have internal predecessors, (117), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 08:03:13,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 127 transitions. [2024-11-09 08:03:13,453 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 127 transitions. Word has length 59 [2024-11-09 08:03:13,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:03:13,454 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 127 transitions. [2024-11-09 08:03:13,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 55 states have (on average 1.709090909090909) internal successors, (94), 51 states have internal predecessors, (94), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 08:03:13,454 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 127 transitions. [2024-11-09 08:03:13,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-09 08:03:13,455 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:03:13,455 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:03:13,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 08:03:13,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:03:13,656 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-09 08:03:13,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:03:13,656 INFO L85 PathProgramCache]: Analyzing trace with hash 771283119, now seen corresponding path program 1 times [2024-11-09 08:03:13,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:03:13,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463408347] [2024-11-09 08:03:13,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:03:13,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:03:13,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:03:14,116 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:03:14,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:03:14,124 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 08:03:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:03:14,171 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-09 08:03:14,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:03:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 08:03:14,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:03:14,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463408347] [2024-11-09 08:03:14,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463408347] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:03:14,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107766363] [2024-11-09 08:03:14,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:03:14,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:03:14,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 08:03:14,191 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 08:03:14,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 08:03:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:03:14,504 INFO L255 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-09 08:03:14,507 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 08:03:14,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 08:03:14,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 08:03:14,793 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 [2024-11-09 08:03:14,797 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 [2024-11-09 08:03:14,991 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-09 08:03:14,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 21 [2024-11-09 08:03:15,004 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-09 08:03:15,004 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 [2024-11-09 08:03:15,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-09 08:03:15,203 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 08:03:15,203 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 08:03:15,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107766363] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:03:15,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 08:03:15,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2024-11-09 08:03:15,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061736462] [2024-11-09 08:03:15,429 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 08:03:15,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 08:03:15,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:03:15,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 08:03:15,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1100, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 08:03:15,431 INFO L87 Difference]: Start difference. First operand 116 states and 127 transitions. Second operand has 31 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 26 states have internal predecessors, (85), 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) [2024-11-09 08:03:16,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:03:16,353 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2024-11-09 08:03:16,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 08:03:16,353 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 26 states have internal predecessors, (85), 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 60 [2024-11-09 08:03:16,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:03:16,354 INFO L225 Difference]: With dead ends: 126 [2024-11-09 08:03:16,354 INFO L226 Difference]: Without dead ends: 126 [2024-11-09 08:03:16,355 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=191, Invalid=2259, Unknown=0, NotChecked=0, Total=2450 [2024-11-09 08:03:16,356 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 59 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 1332 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 08:03:16,356 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 922 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1332 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 08:03:16,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-09 08:03:16,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 120. [2024-11-09 08:03:16,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 98 states have (on average 1.2755102040816326) internal successors, (125), 112 states have internal predecessors, (125), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 08:03:16,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 135 transitions. [2024-11-09 08:03:16,360 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 135 transitions. Word has length 60 [2024-11-09 08:03:16,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:03:16,361 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 135 transitions. [2024-11-09 08:03:16,361 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 26 states have internal predecessors, (85), 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) [2024-11-09 08:03:16,361 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 135 transitions. [2024-11-09 08:03:16,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-09 08:03:16,361 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:03:16,362 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:03:16,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 08:03:16,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-09 08:03:16,568 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-09 08:03:16,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:03:16,568 INFO L85 PathProgramCache]: Analyzing trace with hash 771283118, now seen corresponding path program 1 times [2024-11-09 08:03:16,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:03:16,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807731633] [2024-11-09 08:03:16,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:03:16,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:03:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:03:16,804 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:03:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:03:16,811 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 08:03:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:03:16,819 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-09 08:03:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:03:16,830 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 08:03:16,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:03:16,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807731633] [2024-11-09 08:03:16,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807731633] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 08:03:16,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 08:03:16,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 08:03:16,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652414159] [2024-11-09 08:03:16,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 08:03:16,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 08:03:16,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:03:16,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 08:03:16,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-09 08:03:16,834 INFO L87 Difference]: Start difference. First operand 120 states and 135 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:03:17,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:03:17,011 INFO L93 Difference]: Finished difference Result 125 states and 137 transitions. [2024-11-09 08:03:17,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 08:03:17,012 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 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 60 [2024-11-09 08:03:17,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:03:17,012 INFO L225 Difference]: With dead ends: 125 [2024-11-09 08:03:17,012 INFO L226 Difference]: Without dead ends: 125 [2024-11-09 08:03:17,013 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-11-09 08:03:17,013 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 39 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 08:03:17,013 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 404 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 08:03:17,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-09 08:03:17,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 119. [2024-11-09 08:03:17,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 98 states have (on average 1.2448979591836735) internal successors, (122), 111 states have internal predecessors, (122), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 08:03:17,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 132 transitions. [2024-11-09 08:03:17,017 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 132 transitions. Word has length 60 [2024-11-09 08:03:17,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:03:17,018 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 132 transitions. [2024-11-09 08:03:17,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 08:03:17,018 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 132 transitions. [2024-11-09 08:03:17,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-09 08:03:17,019 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:03:17,019 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:03:17,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-09 08:03:17,019 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-09 08:03:17,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:03:17,019 INFO L85 PathProgramCache]: Analyzing trace with hash -780894481, now seen corresponding path program 1 times [2024-11-09 08:03:17,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:03:17,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483894366] [2024-11-09 08:03:17,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:03:17,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:03:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:03:17,448 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:03:17,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:03:17,458 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 08:03:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:03:17,508 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-09 08:03:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:03:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 08:03:17,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:03:17,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483894366] [2024-11-09 08:03:17,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483894366] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:03:17,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693244831] [2024-11-09 08:03:17,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:03:17,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:03:17,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 08:03:17,529 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 08:03:17,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 08:03:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:03:17,871 INFO L255 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 08:03:17,873 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 08:03:18,062 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 [2024-11-09 08:03:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 08:03:18,066 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 08:03:18,124 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 08:03:18,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693244831] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 08:03:18,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 08:03:18,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 11] total 22 [2024-11-09 08:03:18,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038151719] [2024-11-09 08:03:18,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 08:03:18,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 08:03:18,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 08:03:18,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 08:03:18,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2024-11-09 08:03:18,128 INFO L87 Difference]: Start difference. First operand 119 states and 132 transitions. Second operand has 22 states, 22 states have (on average 3.5) internal successors, (77), 19 states have internal predecessors, (77), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 08:03:22,145 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] [2024-11-09 08:03:26,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 08:03:30,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 08:03:34,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 08:03:38,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 08:03:42,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 08:03:46,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 08:03:50,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 08:03:54,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 08:03:54,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 08:03:54,643 INFO L93 Difference]: Finished difference Result 123 states and 134 transitions. [2024-11-09 08:03:54,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 08:03:54,644 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 19 states have internal predecessors, (77), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2024-11-09 08:03:54,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 08:03:54,645 INFO L225 Difference]: With dead ends: 123 [2024-11-09 08:03:54,645 INFO L226 Difference]: Without dead ends: 123 [2024-11-09 08:03:54,646 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 08:03:54,646 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 103 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 4 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.3s IncrementalHoareTripleChecker+Time [2024-11-09 08:03:54,646 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 974 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 641 Invalid, 9 Unknown, 0 Unchecked, 36.3s Time] [2024-11-09 08:03:54,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-09 08:03:54,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2024-11-09 08:03:54,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 98 states have (on average 1.2346938775510203) internal successors, (121), 111 states have internal predecessors, (121), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 08:03:54,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2024-11-09 08:03:54,650 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 63 [2024-11-09 08:03:54,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 08:03:54,650 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2024-11-09 08:03:54,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 19 states have internal predecessors, (77), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 08:03:54,651 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2024-11-09 08:03:54,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-09 08:03:54,651 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 08:03:54,651 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 08:03:54,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 08:03:54,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:03:54,852 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-09 08:03:54,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 08:03:54,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1602347609, now seen corresponding path program 1 times [2024-11-09 08:03:54,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 08:03:54,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612105306] [2024-11-09 08:03:54,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:03:54,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 08:03:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:03:56,047 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 08:03:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:03:56,105 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 08:03:56,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:03:56,210 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-09 08:03:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 08:03:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 08:03:56,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 08:03:56,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612105306] [2024-11-09 08:03:56,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612105306] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 08:03:56,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996513300] [2024-11-09 08:03:56,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 08:03:56,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 08:03:56,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 08:03:56,382 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 08:03:56,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process