./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/nested_structure-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/nested_structure-2.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 ea326fa3b3c9fd831a506f8385a58b98f853e8c897ae4643e624e28b471a415c --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 10:37:10,517 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 10:37:10,577 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-13 10:37:10,581 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 10:37:10,582 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 10:37:10,608 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 10:37:10,608 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 10:37:10,609 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 10:37:10,611 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 10:37:10,615 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 10:37:10,615 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 10:37:10,615 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 10:37:10,616 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 10:37:10,616 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 10:37:10,616 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 10:37:10,616 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 10:37:10,617 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 10:37:10,617 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 10:37:10,617 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 10:37:10,617 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 10:37:10,617 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 10:37:10,619 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 10:37:10,619 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 10:37:10,620 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 10:37:10,620 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 10:37:10,620 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 10:37:10,620 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 10:37:10,620 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 10:37:10,620 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 10:37:10,621 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 10:37:10,621 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 10:37:10,622 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 10:37:10,622 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 10:37:10,622 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 10:37:10,622 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 10:37:10,623 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 10:37:10,623 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 10:37:10,623 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 10:37:10,623 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 10:37:10,623 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 10:37:10,623 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 10:37:10,624 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 10:37:10,624 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ea326fa3b3c9fd831a506f8385a58b98f853e8c897ae4643e624e28b471a415c [2024-10-13 10:37:10,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 10:37:10,827 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 10:37:10,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 10:37:10,830 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 10:37:10,830 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 10:37:10,831 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/nested_structure-2.i [2024-10-13 10:37:12,042 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 10:37:12,184 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 10:37:12,185 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/nested_structure-2.i [2024-10-13 10:37:12,191 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfa4112aa/dadab39e42bf4d01ab290168ae47c46f/FLAGed3a1ea53 [2024-10-13 10:37:12,603 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfa4112aa/dadab39e42bf4d01ab290168ae47c46f [2024-10-13 10:37:12,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 10:37:12,606 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 10:37:12,607 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 10:37:12,607 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 10:37:12,611 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 10:37:12,612 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:37:12" (1/1) ... [2024-10-13 10:37:12,613 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3deb006c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:37:12, skipping insertion in model container [2024-10-13 10:37:12,614 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:37:12" (1/1) ... [2024-10-13 10:37:12,630 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 10:37:12,778 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 10:37:12,789 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 10:37:12,811 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 10:37:12,826 INFO L204 MainTranslator]: Completed translation [2024-10-13 10:37:12,826 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:37:12 WrapperNode [2024-10-13 10:37:12,827 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 10:37:12,828 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 10:37:12,828 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 10:37:12,829 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 10:37:12,834 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:37:12" (1/1) ... [2024-10-13 10:37:12,842 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:37:12" (1/1) ... [2024-10-13 10:37:12,856 INFO L138 Inliner]: procedures = 18, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 50 [2024-10-13 10:37:12,858 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 10:37:12,859 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 10:37:12,859 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 10:37:12,859 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 10:37:12,867 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:37:12" (1/1) ... [2024-10-13 10:37:12,867 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:37:12" (1/1) ... [2024-10-13 10:37:12,869 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:37:12" (1/1) ... [2024-10-13 10:37:12,886 INFO L175 MemorySlicer]: Split 13 memory accesses to 4 slices as follows [2, 3, 4, 4]. 31 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 1, 2, 2]. The 1 writes are split as follows [0, 1, 0, 0]. [2024-10-13 10:37:12,889 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:37:12" (1/1) ... [2024-10-13 10:37:12,889 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:37:12" (1/1) ... [2024-10-13 10:37:12,896 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:37:12" (1/1) ... [2024-10-13 10:37:12,897 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:37:12" (1/1) ... [2024-10-13 10:37:12,899 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:37:12" (1/1) ... [2024-10-13 10:37:12,903 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:37:12" (1/1) ... [2024-10-13 10:37:12,905 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 10:37:12,906 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 10:37:12,906 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 10:37:12,906 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 10:37:12,906 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:37:12" (1/1) ... [2024-10-13 10:37:12,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 10:37:12,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:37:12,947 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) [2024-10-13 10:37:12,949 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 [2024-10-13 10:37:12,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-13 10:37:12,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-13 10:37:12,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-13 10:37:12,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-10-13 10:37:12,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-10-13 10:37:12,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-10-13 10:37:12,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-10-13 10:37:12,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-10-13 10:37:12,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 10:37:12,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 10:37:12,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 10:37:12,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 10:37:12,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-13 10:37:12,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-13 10:37:12,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 10:37:12,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 10:37:12,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-13 10:37:12,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-13 10:37:12,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 10:37:12,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 10:37:12,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 10:37:12,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 10:37:12,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-13 10:37:12,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-13 10:37:12,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 10:37:13,065 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 10:37:13,067 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 10:37:13,204 INFO L? ?]: Removed 37 outVars from TransFormulas that were not future-live. [2024-10-13 10:37:13,205 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 10:37:13,231 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 10:37:13,232 INFO L314 CfgBuilder]: Removed 0 assume(true) statements. [2024-10-13 10:37:13,234 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:37:13 BoogieIcfgContainer [2024-10-13 10:37:13,234 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 10:37:13,235 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 10:37:13,235 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 10:37:13,239 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 10:37:13,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:37:12" (1/3) ... [2024-10-13 10:37:13,240 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b1574c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:37:13, skipping insertion in model container [2024-10-13 10:37:13,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:37:12" (2/3) ... [2024-10-13 10:37:13,241 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b1574c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:37:13, skipping insertion in model container [2024-10-13 10:37:13,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:37:13" (3/3) ... [2024-10-13 10:37:13,242 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_structure-2.i [2024-10-13 10:37:13,255 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 10:37:13,255 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-10-13 10:37:13,295 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 10:37:13,301 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;@1dce0c53, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 10:37:13,301 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-10-13 10:37:13,305 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 13 states have (on average 2.230769230769231) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:13,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2024-10-13 10:37:13,310 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:37:13,310 INFO L215 NwaCegarLoop]: trace histogram [1, 1] [2024-10-13 10:37:13,311 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-13 10:37:13,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:37:13,315 INFO L85 PathProgramCache]: Analyzing trace with hash 2453, now seen corresponding path program 1 times [2024-10-13 10:37:13,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:37:13,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289135922] [2024-10-13 10:37:13,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:37:13,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:37:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:13,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:37:13,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:37:13,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289135922] [2024-10-13 10:37:13,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289135922] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:37:13,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:37:13,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 10:37:13,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921839718] [2024-10-13 10:37:13,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:37:13,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 10:37:13,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:37:13,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 10:37:13,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 10:37:13,573 INFO L87 Difference]: Start difference. First operand has 28 states, 13 states have (on average 2.230769230769231) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:13,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:37:13,621 INFO L93 Difference]: Finished difference Result 25 states and 24 transitions. [2024-10-13 10:37:13,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 10:37:13,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2024-10-13 10:37:13,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:37:13,628 INFO L225 Difference]: With dead ends: 25 [2024-10-13 10:37:13,629 INFO L226 Difference]: Without dead ends: 24 [2024-10-13 10:37:13,630 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 10:37:13,634 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:37:13,635 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 8 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:37:13,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-13 10:37:13,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-10-13 10:37:13,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 23 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:13,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 23 transitions. [2024-10-13 10:37:13,659 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 23 transitions. Word has length 2 [2024-10-13 10:37:13,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:37:13,660 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 23 transitions. [2024-10-13 10:37:13,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:13,660 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 23 transitions. [2024-10-13 10:37:13,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2024-10-13 10:37:13,662 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:37:13,662 INFO L215 NwaCegarLoop]: trace histogram [1, 1] [2024-10-13 10:37:13,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 10:37:13,662 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-13 10:37:13,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:37:13,663 INFO L85 PathProgramCache]: Analyzing trace with hash 2454, now seen corresponding path program 1 times [2024-10-13 10:37:13,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:37:13,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452146343] [2024-10-13 10:37:13,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:37:13,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:37:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:13,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:37:13,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:37:13,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452146343] [2024-10-13 10:37:13,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452146343] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:37:13,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:37:13,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 10:37:13,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236043848] [2024-10-13 10:37:13,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:37:13,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 10:37:13,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:37:13,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 10:37:13,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 10:37:13,805 INFO L87 Difference]: Start difference. First operand 24 states and 23 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:13,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:37:13,854 INFO L93 Difference]: Finished difference Result 22 states and 21 transitions. [2024-10-13 10:37:13,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 10:37:13,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2024-10-13 10:37:13,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:37:13,855 INFO L225 Difference]: With dead ends: 22 [2024-10-13 10:37:13,856 INFO L226 Difference]: Without dead ends: 22 [2024-10-13 10:37:13,856 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 10:37:13,857 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:37:13,860 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 18 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:37:13,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-13 10:37:13,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-10-13 10:37:13,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 12 states have (on average 1.75) internal successors, (21), 21 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:13,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 21 transitions. [2024-10-13 10:37:13,863 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 21 transitions. Word has length 2 [2024-10-13 10:37:13,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:37:13,864 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 21 transitions. [2024-10-13 10:37:13,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:13,864 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 21 transitions. [2024-10-13 10:37:13,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-10-13 10:37:13,865 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:37:13,865 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-10-13 10:37:13,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 10:37:13,865 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-13 10:37:13,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:37:13,867 INFO L85 PathProgramCache]: Analyzing trace with hash 76019, now seen corresponding path program 1 times [2024-10-13 10:37:13,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:37:13,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176209896] [2024-10-13 10:37:13,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:37:13,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:37:13,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:37:13,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:37:13,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176209896] [2024-10-13 10:37:13,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176209896] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:37:13,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:37:13,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 10:37:13,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904049148] [2024-10-13 10:37:13,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:37:13,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 10:37:13,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:37:13,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 10:37:13,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:37:13,970 INFO L87 Difference]: Start difference. First operand 22 states and 21 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:14,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:37:14,006 INFO L93 Difference]: Finished difference Result 21 states and 20 transitions. [2024-10-13 10:37:14,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 10:37:14,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-10-13 10:37:14,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:37:14,007 INFO L225 Difference]: With dead ends: 21 [2024-10-13 10:37:14,007 INFO L226 Difference]: Without dead ends: 21 [2024-10-13 10:37:14,007 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:37:14,008 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:37:14,009 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 22 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:37:14,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-13 10:37:14,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-10-13 10:37:14,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 20 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:14,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 20 transitions. [2024-10-13 10:37:14,012 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 20 transitions. Word has length 3 [2024-10-13 10:37:14,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:37:14,012 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 20 transitions. [2024-10-13 10:37:14,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:14,013 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 20 transitions. [2024-10-13 10:37:14,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-10-13 10:37:14,013 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:37:14,013 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-10-13 10:37:14,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 10:37:14,013 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-13 10:37:14,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:37:14,014 INFO L85 PathProgramCache]: Analyzing trace with hash 76020, now seen corresponding path program 1 times [2024-10-13 10:37:14,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:37:14,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689417553] [2024-10-13 10:37:14,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:37:14,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:37:14,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:37:14,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:37:14,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689417553] [2024-10-13 10:37:14,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689417553] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:37:14,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:37:14,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 10:37:14,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826863544] [2024-10-13 10:37:14,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:37:14,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 10:37:14,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:37:14,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 10:37:14,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:37:14,103 INFO L87 Difference]: Start difference. First operand 21 states and 20 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:14,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:37:14,143 INFO L93 Difference]: Finished difference Result 20 states and 19 transitions. [2024-10-13 10:37:14,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 10:37:14,144 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-10-13 10:37:14,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:37:14,144 INFO L225 Difference]: With dead ends: 20 [2024-10-13 10:37:14,144 INFO L226 Difference]: Without dead ends: 20 [2024-10-13 10:37:14,144 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:37:14,145 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:37:14,145 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 25 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:37:14,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-13 10:37:14,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-10-13 10:37:14,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 19 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:14,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 19 transitions. [2024-10-13 10:37:14,149 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 19 transitions. Word has length 3 [2024-10-13 10:37:14,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:37:14,150 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 19 transitions. [2024-10-13 10:37:14,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:14,150 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 19 transitions. [2024-10-13 10:37:14,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-10-13 10:37:14,150 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:37:14,150 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-10-13 10:37:14,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 10:37:14,150 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-13 10:37:14,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:37:14,151 INFO L85 PathProgramCache]: Analyzing trace with hash 2356568, now seen corresponding path program 1 times [2024-10-13 10:37:14,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:37:14,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355253207] [2024-10-13 10:37:14,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:37:14,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:37:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:37:14,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:37:14,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355253207] [2024-10-13 10:37:14,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355253207] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:37:14,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:37:14,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 10:37:14,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884384720] [2024-10-13 10:37:14,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:37:14,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 10:37:14,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:37:14,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 10:37:14,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:37:14,269 INFO L87 Difference]: Start difference. First operand 20 states and 19 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:14,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:37:14,336 INFO L93 Difference]: Finished difference Result 19 states and 18 transitions. [2024-10-13 10:37:14,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 10:37:14,336 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-10-13 10:37:14,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:37:14,337 INFO L225 Difference]: With dead ends: 19 [2024-10-13 10:37:14,337 INFO L226 Difference]: Without dead ends: 19 [2024-10-13 10:37:14,338 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-13 10:37:14,338 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:37:14,342 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 25 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:37:14,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-10-13 10:37:14,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-10-13 10:37:14,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.5) internal successors, (18), 18 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:14,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 18 transitions. [2024-10-13 10:37:14,344 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 18 transitions. Word has length 4 [2024-10-13 10:37:14,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:37:14,344 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 18 transitions. [2024-10-13 10:37:14,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:14,345 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 18 transitions. [2024-10-13 10:37:14,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-10-13 10:37:14,345 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:37:14,345 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-10-13 10:37:14,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 10:37:14,345 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-13 10:37:14,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:37:14,347 INFO L85 PathProgramCache]: Analyzing trace with hash 2356569, now seen corresponding path program 1 times [2024-10-13 10:37:14,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:37:14,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540749661] [2024-10-13 10:37:14,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:37:14,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:37:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:14,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:37:14,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:37:14,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540749661] [2024-10-13 10:37:14,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540749661] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:37:14,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:37:14,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 10:37:14,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699888089] [2024-10-13 10:37:14,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:37:14,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 10:37:14,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:37:14,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 10:37:14,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:37:14,552 INFO L87 Difference]: Start difference. First operand 19 states and 18 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:14,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:37:14,627 INFO L93 Difference]: Finished difference Result 18 states and 17 transitions. [2024-10-13 10:37:14,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 10:37:14,627 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-10-13 10:37:14,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:37:14,627 INFO L225 Difference]: With dead ends: 18 [2024-10-13 10:37:14,628 INFO L226 Difference]: Without dead ends: 18 [2024-10-13 10:37:14,628 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-13 10:37:14,628 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:37:14,630 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 30 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:37:14,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-10-13 10:37:14,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-10-13 10:37:14,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 17 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:14,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 17 transitions. [2024-10-13 10:37:14,633 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 17 transitions. Word has length 4 [2024-10-13 10:37:14,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:37:14,633 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 17 transitions. [2024-10-13 10:37:14,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:14,633 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 17 transitions. [2024-10-13 10:37:14,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-13 10:37:14,634 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:37:14,634 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-13 10:37:14,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-13 10:37:14,635 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-13 10:37:14,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:37:14,635 INFO L85 PathProgramCache]: Analyzing trace with hash -2030266588, now seen corresponding path program 1 times [2024-10-13 10:37:14,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:37:14,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930491967] [2024-10-13 10:37:14,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:37:14,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:37:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:14,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:37:14,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:37:14,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930491967] [2024-10-13 10:37:14,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930491967] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:37:14,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:37:14,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 10:37:14,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171631058] [2024-10-13 10:37:14,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:37:14,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 10:37:14,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:37:14,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 10:37:14,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:37:14,681 INFO L87 Difference]: Start difference. First operand 18 states and 17 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:14,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:37:14,723 INFO L93 Difference]: Finished difference Result 17 states and 16 transitions. [2024-10-13 10:37:14,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 10:37:14,724 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-13 10:37:14,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:37:14,724 INFO L225 Difference]: With dead ends: 17 [2024-10-13 10:37:14,724 INFO L226 Difference]: Without dead ends: 17 [2024-10-13 10:37:14,724 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-13 10:37:14,725 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:37:14,727 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 21 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:37:14,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-10-13 10:37:14,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-10-13 10:37:14,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 16 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:14,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 16 transitions. [2024-10-13 10:37:14,730 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 16 transitions. Word has length 6 [2024-10-13 10:37:14,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:37:14,730 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 16 transitions. [2024-10-13 10:37:14,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:14,731 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 16 transitions. [2024-10-13 10:37:14,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-13 10:37:14,731 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:37:14,731 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-13 10:37:14,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-13 10:37:14,731 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-13 10:37:14,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:37:14,731 INFO L85 PathProgramCache]: Analyzing trace with hash -2030266587, now seen corresponding path program 1 times [2024-10-13 10:37:14,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:37:14,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899642455] [2024-10-13 10:37:14,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:37:14,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:37:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:37:14,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:37:14,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899642455] [2024-10-13 10:37:14,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899642455] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:37:14,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:37:14,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 10:37:14,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37703221] [2024-10-13 10:37:14,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:37:14,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 10:37:14,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:37:14,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 10:37:14,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-13 10:37:14,835 INFO L87 Difference]: Start difference. First operand 17 states and 16 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:14,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:37:14,873 INFO L93 Difference]: Finished difference Result 16 states and 15 transitions. [2024-10-13 10:37:14,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 10:37:14,873 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-13 10:37:14,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:37:14,873 INFO L225 Difference]: With dead ends: 16 [2024-10-13 10:37:14,873 INFO L226 Difference]: Without dead ends: 16 [2024-10-13 10:37:14,873 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-10-13 10:37:14,874 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:37:14,874 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 23 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:37:14,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-10-13 10:37:14,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-10-13 10:37:14,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 15 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:14,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 15 transitions. [2024-10-13 10:37:14,876 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 15 transitions. Word has length 6 [2024-10-13 10:37:14,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:37:14,876 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 15 transitions. [2024-10-13 10:37:14,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:14,876 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 15 transitions. [2024-10-13 10:37:14,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-13 10:37:14,876 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:37:14,876 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:37:14,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-13 10:37:14,876 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-13 10:37:14,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:37:14,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1486245201, now seen corresponding path program 1 times [2024-10-13 10:37:14,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:37:14,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677223631] [2024-10-13 10:37:14,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:37:14,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:37:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:14,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:37:14,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:37:14,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677223631] [2024-10-13 10:37:14,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677223631] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:37:14,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:37:14,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-13 10:37:14,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992834513] [2024-10-13 10:37:14,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:37:14,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 10:37:14,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:37:14,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 10:37:14,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-13 10:37:14,989 INFO L87 Difference]: Start difference. First operand 16 states and 15 transitions. Second operand has 8 states, 7 states have (on average 1.0) internal successors, (7), 7 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:15,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:37:15,041 INFO L93 Difference]: Finished difference Result 15 states and 14 transitions. [2024-10-13 10:37:15,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 10:37:15,042 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.0) internal successors, (7), 7 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-13 10:37:15,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:37:15,042 INFO L225 Difference]: With dead ends: 15 [2024-10-13 10:37:15,042 INFO L226 Difference]: Without dead ends: 15 [2024-10-13 10:37:15,043 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-10-13 10:37:15,044 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:37:15,044 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 19 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:37:15,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-10-13 10:37:15,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-10-13 10:37:15,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 14 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:15,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 14 transitions. [2024-10-13 10:37:15,046 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 14 transitions. Word has length 7 [2024-10-13 10:37:15,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:37:15,046 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 14 transitions. [2024-10-13 10:37:15,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.0) internal successors, (7), 7 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:15,047 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 14 transitions. [2024-10-13 10:37:15,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-13 10:37:15,047 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:37:15,047 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:37:15,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-13 10:37:15,047 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-13 10:37:15,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:37:15,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1486245202, now seen corresponding path program 1 times [2024-10-13 10:37:15,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:37:15,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742095196] [2024-10-13 10:37:15,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:37:15,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:37:15,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:15,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:37:15,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:37:15,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742095196] [2024-10-13 10:37:15,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742095196] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:37:15,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:37:15,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 10:37:15,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416773689] [2024-10-13 10:37:15,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:37:15,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 10:37:15,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:37:15,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 10:37:15,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:37:15,215 INFO L87 Difference]: Start difference. First operand 15 states and 14 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:15,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:37:15,239 INFO L93 Difference]: Finished difference Result 14 states and 13 transitions. [2024-10-13 10:37:15,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 10:37:15,240 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-13 10:37:15,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:37:15,240 INFO L225 Difference]: With dead ends: 14 [2024-10-13 10:37:15,240 INFO L226 Difference]: Without dead ends: 14 [2024-10-13 10:37:15,240 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:37:15,240 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:37:15,241 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:37:15,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-10-13 10:37:15,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-10-13 10:37:15,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:15,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 13 transitions. [2024-10-13 10:37:15,242 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 13 transitions. Word has length 7 [2024-10-13 10:37:15,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:37:15,242 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 13 transitions. [2024-10-13 10:37:15,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:15,242 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 13 transitions. [2024-10-13 10:37:15,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-13 10:37:15,242 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:37:15,242 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:37:15,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-13 10:37:15,242 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-13 10:37:15,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:37:15,243 INFO L85 PathProgramCache]: Analyzing trace with hash -86229284, now seen corresponding path program 1 times [2024-10-13 10:37:15,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:37:15,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291257216] [2024-10-13 10:37:15,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:37:15,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:37:15,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:15,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:37:15,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:37:15,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291257216] [2024-10-13 10:37:15,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291257216] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:37:15,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:37:15,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 10:37:15,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029826304] [2024-10-13 10:37:15,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:37:15,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 10:37:15,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:37:15,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 10:37:15,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:37:15,352 INFO L87 Difference]: Start difference. First operand 14 states and 13 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:15,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:37:15,369 INFO L93 Difference]: Finished difference Result 13 states and 12 transitions. [2024-10-13 10:37:15,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 10:37:15,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-13 10:37:15,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:37:15,370 INFO L225 Difference]: With dead ends: 13 [2024-10-13 10:37:15,370 INFO L226 Difference]: Without dead ends: 11 [2024-10-13 10:37:15,370 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:37:15,370 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:37:15,371 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:37:15,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-10-13 10:37:15,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2024-10-13 10:37:15,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.0) internal successors, (10), 10 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:15,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 10 transitions. [2024-10-13 10:37:15,372 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 10 transitions. Word has length 10 [2024-10-13 10:37:15,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:37:15,372 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 10 transitions. [2024-10-13 10:37:15,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:15,372 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 10 transitions. [2024-10-13 10:37:15,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-13 10:37:15,372 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:37:15,372 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:37:15,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-13 10:37:15,372 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-13 10:37:15,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:37:15,373 INFO L85 PathProgramCache]: Analyzing trace with hash -86221885, now seen corresponding path program 1 times [2024-10-13 10:37:15,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:37:15,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478138240] [2024-10-13 10:37:15,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:37:15,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:37:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:37:15,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:37:15,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:37:15,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478138240] [2024-10-13 10:37:15,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478138240] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:37:15,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:37:15,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-13 10:37:15,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902788944] [2024-10-13 10:37:15,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:37:15,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-13 10:37:15,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:37:15,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-13 10:37:15,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-10-13 10:37:15,587 INFO L87 Difference]: Start difference. First operand 11 states and 10 transitions. Second operand has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:15,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:37:15,618 INFO L93 Difference]: Finished difference Result 8 states and 7 transitions. [2024-10-13 10:37:15,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 10:37:15,619 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-13 10:37:15,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:37:15,619 INFO L225 Difference]: With dead ends: 8 [2024-10-13 10:37:15,619 INFO L226 Difference]: Without dead ends: 0 [2024-10-13 10:37:15,619 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-10-13 10:37:15,620 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:37:15,620 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:37:15,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-10-13 10:37:15,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-10-13 10:37:15,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:15,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-10-13 10:37:15,621 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2024-10-13 10:37:15,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:37:15,621 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-10-13 10:37:15,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:37:15,621 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-10-13 10:37:15,621 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-10-13 10:37:15,624 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 14 remaining) [2024-10-13 10:37:15,624 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 14 remaining) [2024-10-13 10:37:15,625 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2024-10-13 10:37:15,625 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2024-10-13 10:37:15,625 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2024-10-13 10:37:15,625 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2024-10-13 10:37:15,625 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2024-10-13 10:37:15,625 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 14 remaining) [2024-10-13 10:37:15,625 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 14 remaining) [2024-10-13 10:37:15,626 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 14 remaining) [2024-10-13 10:37:15,626 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 14 remaining) [2024-10-13 10:37:15,626 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 14 remaining) [2024-10-13 10:37:15,626 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (1 of 14 remaining) [2024-10-13 10:37:15,627 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK (0 of 14 remaining) [2024-10-13 10:37:15,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-13 10:37:15,630 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:37:15,632 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-10-13 10:37:15,635 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 10:37:15 BoogieIcfgContainer [2024-10-13 10:37:15,636 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-13 10:37:15,636 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-13 10:37:15,637 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-13 10:37:15,637 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-13 10:37:15,637 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:37:13" (3/4) ... [2024-10-13 10:37:15,639 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-10-13 10:37:15,644 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2024-10-13 10:37:15,645 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2024-10-13 10:37:15,645 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-10-13 10:37:15,645 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-10-13 10:37:15,712 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-10-13 10:37:15,713 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-10-13 10:37:15,713 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-13 10:37:15,713 INFO L158 Benchmark]: Toolchain (without parser) took 3107.54ms. Allocated memory was 190.8MB in the beginning and 230.7MB in the end (delta: 39.8MB). Free memory was 122.3MB in the beginning and 157.8MB in the end (delta: -35.5MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. [2024-10-13 10:37:15,714 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 125.8MB. Free memory is still 89.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-13 10:37:15,714 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.02ms. Allocated memory is still 190.8MB. Free memory was 121.8MB in the beginning and 109.8MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-13 10:37:15,714 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.04ms. Allocated memory is still 190.8MB. Free memory was 109.8MB in the beginning and 108.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-13 10:37:15,714 INFO L158 Benchmark]: Boogie Preprocessor took 45.99ms. Allocated memory is still 190.8MB. Free memory was 108.2MB in the beginning and 106.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-13 10:37:15,714 INFO L158 Benchmark]: RCFGBuilder took 328.34ms. Allocated memory is still 190.8MB. Free memory was 105.6MB in the beginning and 88.2MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-10-13 10:37:15,715 INFO L158 Benchmark]: TraceAbstraction took 2400.65ms. Allocated memory was 190.8MB in the beginning and 230.7MB in the end (delta: 39.8MB). Free memory was 87.8MB in the beginning and 163.1MB in the end (delta: -75.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-13 10:37:15,715 INFO L158 Benchmark]: Witness Printer took 76.44ms. Allocated memory is still 230.7MB. Free memory was 163.1MB in the beginning and 157.8MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-10-13 10:37:15,716 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 125.8MB. Free memory is still 89.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 220.02ms. Allocated memory is still 190.8MB. Free memory was 121.8MB in the beginning and 109.8MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.04ms. Allocated memory is still 190.8MB. Free memory was 109.8MB in the beginning and 108.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.99ms. Allocated memory is still 190.8MB. Free memory was 108.2MB in the beginning and 106.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 328.34ms. Allocated memory is still 190.8MB. Free memory was 105.6MB in the beginning and 88.2MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 2400.65ms. Allocated memory was 190.8MB in the beginning and 230.7MB in the end (delta: 39.8MB). Free memory was 87.8MB in the beginning and 163.1MB in the end (delta: -75.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 76.44ms. Allocated memory is still 230.7MB. Free memory was 163.1MB in the beginning and 157.8MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 12]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 38]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 14 error locations. Started 1 CEGAR loops. OverallTime: 2.4s, OverallIterations: 12, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 50 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 50 mSDsluCounter, 214 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 125 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 372 IncrementalHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 89 mSDtfsCounter, 372 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=0, InterpolantAutomatonStates: 59, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 64 NumberOfCodeBlocks, 64 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 52 ConstructedInterpolants, 0 QuantifiedInterpolants, 1058 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 14 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-10-13 10:37:15,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE