./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0235-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0235-2.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5243781ee83706d005235269371a592cabf9c2dbc613c235cbe81d6e89d326d7 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 17:58:16,757 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 17:58:16,848 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 17:58:16,853 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 17:58:16,853 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 17:58:16,884 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 17:58:16,885 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 17:58:16,885 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 17:58:16,886 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 17:58:16,887 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 17:58:16,888 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 17:58:16,888 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 17:58:16,889 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 17:58:16,889 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 17:58:16,890 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 17:58:16,890 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 17:58:16,890 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 17:58:16,891 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 17:58:16,891 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 17:58:16,891 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 17:58:16,892 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 17:58:16,892 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 17:58:16,893 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 17:58:16,893 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 17:58:16,893 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 17:58:16,894 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 17:58:16,894 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 17:58:16,894 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 17:58:16,895 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 17:58:16,895 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 17:58:16,895 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 17:58:16,895 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 17:58:16,896 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 17:58:16,896 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 17:58:16,896 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 17:58:16,897 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 17:58:16,897 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 17:58:16,897 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 17:58:16,898 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 17:58:16,898 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 17:58:16,898 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 17:58:16,900 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 17:58:16,900 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5243781ee83706d005235269371a592cabf9c2dbc613c235cbe81d6e89d326d7 [2024-10-11 17:58:17,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 17:58:17,178 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 17:58:17,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 17:58:17,182 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 17:58:17,183 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 17:58:17,185 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0235-2.i [2024-10-11 17:58:18,584 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 17:58:18,841 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 17:58:18,842 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0235-2.i [2024-10-11 17:58:18,861 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/835872e05/ff7c1baa09094bbd907e1d488a94f8c6/FLAGad5c19fb9 [2024-10-11 17:58:19,147 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/835872e05/ff7c1baa09094bbd907e1d488a94f8c6 [2024-10-11 17:58:19,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 17:58:19,151 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 17:58:19,153 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 17:58:19,153 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 17:58:19,159 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 17:58:19,159 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 05:58:19" (1/1) ... [2024-10-11 17:58:19,160 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@460a869a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:58:19, skipping insertion in model container [2024-10-11 17:58:19,161 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 05:58:19" (1/1) ... [2024-10-11 17:58:19,208 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 17:58:19,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 17:58:19,585 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 17:58:19,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 17:58:19,703 INFO L204 MainTranslator]: Completed translation [2024-10-11 17:58:19,706 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:58:19 WrapperNode [2024-10-11 17:58:19,707 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 17:58:19,708 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 17:58:19,708 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 17:58:19,709 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 17:58:19,716 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:58:19" (1/1) ... [2024-10-11 17:58:19,743 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:58:19" (1/1) ... [2024-10-11 17:58:19,783 INFO L138 Inliner]: procedures = 188, calls = 71, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 243 [2024-10-11 17:58:19,786 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 17:58:19,788 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 17:58:19,788 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 17:58:19,788 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 17:58:19,802 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:58:19" (1/1) ... [2024-10-11 17:58:19,802 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:58:19" (1/1) ... [2024-10-11 17:58:19,808 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:58:19" (1/1) ... [2024-10-11 17:58:19,839 INFO L175 MemorySlicer]: Split 38 memory accesses to 3 slices as follows [2, 10, 26]. 68 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0]. The 13 writes are split as follows [0, 1, 12]. [2024-10-11 17:58:19,839 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:58:19" (1/1) ... [2024-10-11 17:58:19,840 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:58:19" (1/1) ... [2024-10-11 17:58:19,850 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:58:19" (1/1) ... [2024-10-11 17:58:19,855 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:58:19" (1/1) ... [2024-10-11 17:58:19,857 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:58:19" (1/1) ... [2024-10-11 17:58:19,859 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:58:19" (1/1) ... [2024-10-11 17:58:19,863 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 17:58:19,864 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 17:58:19,864 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 17:58:19,864 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 17:58:19,865 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:58:19" (1/1) ... [2024-10-11 17:58:19,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 17:58:19,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:58:19,906 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 17:58:19,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 17:58:19,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 17:58:19,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 17:58:19,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-11 17:58:19,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-11 17:58:19,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-11 17:58:19,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-11 17:58:19,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-11 17:58:19,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-11 17:58:19,964 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2024-10-11 17:58:19,964 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2024-10-11 17:58:19,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-11 17:58:19,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-10-11 17:58:19,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-10-11 17:58:19,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-10-11 17:58:19,965 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2024-10-11 17:58:19,965 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2024-10-11 17:58:19,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 17:58:19,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 17:58:19,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-11 17:58:19,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 17:58:19,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 17:58:20,158 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 17:58:20,160 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 17:58:20,733 INFO L? ?]: Removed 203 outVars from TransFormulas that were not future-live. [2024-10-11 17:58:20,734 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 17:58:20,826 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 17:58:20,826 INFO L314 CfgBuilder]: Removed 10 assume(true) statements. [2024-10-11 17:58:20,827 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 05:58:20 BoogieIcfgContainer [2024-10-11 17:58:20,828 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 17:58:20,831 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 17:58:20,831 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 17:58:20,835 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 17:58:20,835 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 05:58:19" (1/3) ... [2024-10-11 17:58:20,835 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f145409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 05:58:20, skipping insertion in model container [2024-10-11 17:58:20,836 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:58:19" (2/3) ... [2024-10-11 17:58:20,838 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f145409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 05:58:20, skipping insertion in model container [2024-10-11 17:58:20,838 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 05:58:20" (3/3) ... [2024-10-11 17:58:20,839 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0235-2.i [2024-10-11 17:58:20,857 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 17:58:20,858 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 87 error locations. [2024-10-11 17:58:20,910 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 17:58:20,919 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;@63ed8709, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 17:58:20,919 INFO L334 AbstractCegarLoop]: Starting to check reachability of 87 error locations. [2024-10-11 17:58:20,923 INFO L276 IsEmpty]: Start isEmpty. Operand has 208 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 193 states have internal predecessors, (225), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-11 17:58:20,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-10-11 17:58:20,929 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:58:20,930 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-10-11 17:58:20,931 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2024-10-11 17:58:20,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:58:20,938 INFO L85 PathProgramCache]: Analyzing trace with hash 480875, now seen corresponding path program 1 times [2024-10-11 17:58:20,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:58:20,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054736854] [2024-10-11 17:58:20,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:58:20,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:58:21,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:58:21,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:58:21,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054736854] [2024-10-11 17:58:21,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054736854] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:58:21,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:58:21,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 17:58:21,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236097151] [2024-10-11 17:58:21,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:58:21,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 17:58:21,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:58:21,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 17:58:21,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 17:58:21,100 INFO L87 Difference]: Start difference. First operand has 208 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 193 states have internal predecessors, (225), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 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) [2024-10-11 17:58:21,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:58:21,184 INFO L93 Difference]: Finished difference Result 208 states and 238 transitions. [2024-10-11 17:58:21,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 17:58:21,188 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 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 [2024-10-11 17:58:21,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:58:21,200 INFO L225 Difference]: With dead ends: 208 [2024-10-11 17:58:21,200 INFO L226 Difference]: Without dead ends: 207 [2024-10-11 17:58:21,202 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 17:58:21,207 INFO L432 NwaCegarLoop]: 214 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:58:21,208 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 214 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:58:21,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-10-11 17:58:21,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2024-10-11 17:58:21,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 106 states have (on average 2.009433962264151) internal successors, (213), 192 states have internal predecessors, (213), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-11 17:58:21,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 237 transitions. [2024-10-11 17:58:21,254 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 237 transitions. Word has length 3 [2024-10-11 17:58:21,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:58:21,255 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 237 transitions. [2024-10-11 17:58:21,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 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) [2024-10-11 17:58:21,255 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 237 transitions. [2024-10-11 17:58:21,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-11 17:58:21,256 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:58:21,256 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-11 17:58:21,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 17:58:21,256 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2024-10-11 17:58:21,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:58:21,257 INFO L85 PathProgramCache]: Analyzing trace with hash 457992285, now seen corresponding path program 1 times [2024-10-11 17:58:21,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:58:21,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154893301] [2024-10-11 17:58:21,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:58:21,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:58:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:21,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:58:21,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:58:21,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154893301] [2024-10-11 17:58:21,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154893301] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:58:21,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:58:21,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 17:58:21,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792385562] [2024-10-11 17:58:21,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:58:21,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 17:58:21,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:58:21,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 17:58:21,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 17:58:21,407 INFO L87 Difference]: Start difference. First operand 207 states and 237 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:58:21,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:58:21,582 INFO L93 Difference]: Finished difference Result 206 states and 236 transitions. [2024-10-11 17:58:21,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 17:58:21,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-10-11 17:58:21,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:58:21,585 INFO L225 Difference]: With dead ends: 206 [2024-10-11 17:58:21,587 INFO L226 Difference]: Without dead ends: 206 [2024-10-11 17:58:21,588 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 17:58:21,589 INFO L432 NwaCegarLoop]: 209 mSDtfsCounter, 3 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:58:21,589 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 359 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:58:21,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-10-11 17:58:21,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2024-10-11 17:58:21,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 106 states have (on average 2.0) internal successors, (212), 191 states have internal predecessors, (212), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-11 17:58:21,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 236 transitions. [2024-10-11 17:58:21,617 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 236 transitions. Word has length 5 [2024-10-11 17:58:21,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:58:21,617 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 236 transitions. [2024-10-11 17:58:21,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:58:21,618 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 236 transitions. [2024-10-11 17:58:21,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-11 17:58:21,618 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:58:21,619 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 17:58:21,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 17:58:21,619 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2024-10-11 17:58:21,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:58:21,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1312859187, now seen corresponding path program 1 times [2024-10-11 17:58:21,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:58:21,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031674646] [2024-10-11 17:58:21,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:58:21,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:58:21,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 17:58:21,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [749599228] [2024-10-11 17:58:21,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:58:21,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:58:21,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:58:21,671 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:58:21,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 17:58:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:21,764 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-11 17:58:21,772 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:58:21,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 17:58:21,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:58:21,887 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 17:58:21,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:58:21,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031674646] [2024-10-11 17:58:21,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 17:58:21,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749599228] [2024-10-11 17:58:21,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749599228] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:58:21,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:58:21,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 17:58:21,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766181074] [2024-10-11 17:58:21,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:58:21,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 17:58:21,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:58:21,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 17:58:21,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:58:21,892 INFO L87 Difference]: Start difference. First operand 206 states and 236 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:58:22,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:58:22,108 INFO L93 Difference]: Finished difference Result 213 states and 243 transitions. [2024-10-11 17:58:22,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 17:58:22,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-11 17:58:22,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:58:22,110 INFO L225 Difference]: With dead ends: 213 [2024-10-11 17:58:22,110 INFO L226 Difference]: Without dead ends: 213 [2024-10-11 17:58:22,110 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:58:22,111 INFO L432 NwaCegarLoop]: 204 mSDtfsCounter, 9 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:58:22,111 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 563 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:58:22,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2024-10-11 17:58:22,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2024-10-11 17:58:22,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 112 states have (on average 1.9553571428571428) internal successors, (219), 197 states have internal predecessors, (219), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-11 17:58:22,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 243 transitions. [2024-10-11 17:58:22,126 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 243 transitions. Word has length 6 [2024-10-11 17:58:22,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:58:22,126 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 243 transitions. [2024-10-11 17:58:22,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:58:22,127 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 243 transitions. [2024-10-11 17:58:22,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-11 17:58:22,128 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:58:22,128 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:58:22,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-11 17:58:22,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:58:22,329 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2024-10-11 17:58:22,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:58:22,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1795715578, now seen corresponding path program 1 times [2024-10-11 17:58:22,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:58:22,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200897169] [2024-10-11 17:58:22,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:58:22,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:58:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 17:58:22,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66543954] [2024-10-11 17:58:22,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:58:22,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:58:22,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:58:22,468 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:58:22,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 17:58:22,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:22,697 INFO L255 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-10-11 17:58:22,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:58:22,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-11 17:58:22,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-11 17:58:22,868 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 63 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 17:58:22,869 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:58:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 27 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-10-11 17:58:23,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:58:23,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200897169] [2024-10-11 17:58:23,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 17:58:23,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66543954] [2024-10-11 17:58:23,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66543954] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:58:23,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 17:58:23,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2024-10-11 17:58:23,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921357865] [2024-10-11 17:58:23,122 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 17:58:23,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 17:58:23,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:58:23,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 17:58:23,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-10-11 17:58:23,125 INFO L87 Difference]: Start difference. First operand 213 states and 243 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-10-11 17:58:23,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:58:23,503 INFO L93 Difference]: Finished difference Result 224 states and 254 transitions. [2024-10-11 17:58:23,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 17:58:23,503 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2024-10-11 17:58:23,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:58:23,505 INFO L225 Difference]: With dead ends: 224 [2024-10-11 17:58:23,505 INFO L226 Difference]: Without dead ends: 215 [2024-10-11 17:58:23,505 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2024-10-11 17:58:23,506 INFO L432 NwaCegarLoop]: 202 mSDtfsCounter, 17 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:58:23,507 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 943 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:58:23,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-10-11 17:58:23,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2024-10-11 17:58:23,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 115 states have (on average 1.9217391304347826) internal successors, (221), 199 states have internal predecessors, (221), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-11 17:58:23,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 245 transitions. [2024-10-11 17:58:23,517 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 245 transitions. Word has length 55 [2024-10-11 17:58:23,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:58:23,518 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 245 transitions. [2024-10-11 17:58:23,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-10-11 17:58:23,518 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 245 transitions. [2024-10-11 17:58:23,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-11 17:58:23,520 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:58:23,520 INFO L215 NwaCegarLoop]: trace histogram [11, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:58:23,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 17:58:23,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:58:23,725 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2024-10-11 17:58:23,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:58:23,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1722556111, now seen corresponding path program 1 times [2024-10-11 17:58:23,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:58:23,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139500567] [2024-10-11 17:58:23,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:58:23,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:58:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:24,409 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 17:58:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:24,425 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-11 17:58:24,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:24,441 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-11 17:58:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:24,455 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-10-11 17:58:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:24,469 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-10-11 17:58:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:24,559 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-10-11 17:58:24,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:24,677 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 100 proven. 11 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2024-10-11 17:58:24,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:58:24,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139500567] [2024-10-11 17:58:24,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139500567] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:58:24,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805536005] [2024-10-11 17:58:24,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:58:24,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:58:24,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:58:24,680 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:58:24,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 17:58:24,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:24,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-11 17:58:24,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:58:25,005 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|)) is different from true [2024-10-11 17:58:25,050 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-11 17:58:25,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-10-11 17:58:25,059 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 105 proven. 1 refuted. 0 times theorem prover too weak. 110 trivial. 10 not checked. [2024-10-11 17:58:25,059 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:58:25,301 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 17:58:25,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2024-10-11 17:58:25,331 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 105 proven. 11 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-10-11 17:58:25,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805536005] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:58:25,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:58:25,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 16 [2024-10-11 17:58:25,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828112844] [2024-10-11 17:58:25,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:58:25,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 17:58:25,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:58:25,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 17:58:25,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=194, Unknown=1, NotChecked=28, Total=272 [2024-10-11 17:58:25,335 INFO L87 Difference]: Start difference. First operand 215 states and 245 transitions. Second operand has 17 states, 16 states have (on average 3.3125) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-11 17:58:26,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:58:26,502 INFO L93 Difference]: Finished difference Result 305 states and 355 transitions. [2024-10-11 17:58:26,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 17:58:26,503 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2024-10-11 17:58:26,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:58:26,506 INFO L225 Difference]: With dead ends: 305 [2024-10-11 17:58:26,506 INFO L226 Difference]: Without dead ends: 305 [2024-10-11 17:58:26,507 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 142 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=274, Unknown=1, NotChecked=34, Total=380 [2024-10-11 17:58:26,507 INFO L432 NwaCegarLoop]: 100 mSDtfsCounter, 111 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 1727 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 2075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 339 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:58:26,508 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 868 Invalid, 2075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1727 Invalid, 0 Unknown, 339 Unchecked, 1.0s Time] [2024-10-11 17:58:26,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2024-10-11 17:58:26,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 213. [2024-10-11 17:58:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 115 states have (on average 1.9043478260869566) internal successors, (219), 197 states have internal predecessors, (219), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-11 17:58:26,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 243 transitions. [2024-10-11 17:58:26,522 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 243 transitions. Word has length 71 [2024-10-11 17:58:26,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:58:26,523 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 243 transitions. [2024-10-11 17:58:26,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-11 17:58:26,523 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 243 transitions. [2024-10-11 17:58:26,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-11 17:58:26,527 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:58:26,528 INFO L215 NwaCegarLoop]: trace histogram [11, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:58:26,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 17:58:26,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:58:26,730 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2024-10-11 17:58:26,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:58:26,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1722556112, now seen corresponding path program 1 times [2024-10-11 17:58:26,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:58:26,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191238496] [2024-10-11 17:58:26,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:58:26,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:58:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 17:58:27,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1625194115] [2024-10-11 17:58:27,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:58:27,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:58:27,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:58:27,006 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:58:27,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 17:58:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:27,283 INFO L255 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-10-11 17:58:27,288 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:58:27,466 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2024-10-11 17:58:27,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 17:58:27,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-11 17:58:27,520 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 17:58:27,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-11 17:58:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 11 not checked. [2024-10-11 17:58:27,536 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:58:27,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:58:27,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191238496] [2024-10-11 17:58:27,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 17:58:27,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625194115] [2024-10-11 17:58:27,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625194115] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:58:27,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 17:58:27,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-10-11 17:58:27,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413443362] [2024-10-11 17:58:27,643 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 17:58:27,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 17:58:27,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:58:27,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 17:58:27,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=129, Unknown=1, NotChecked=22, Total=182 [2024-10-11 17:58:27,645 INFO L87 Difference]: Start difference. First operand 213 states and 243 transitions. Second operand has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-11 17:58:28,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:58:28,765 INFO L93 Difference]: Finished difference Result 303 states and 353 transitions. [2024-10-11 17:58:28,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 17:58:28,766 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 71 [2024-10-11 17:58:28,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:58:28,767 INFO L225 Difference]: With dead ends: 303 [2024-10-11 17:58:28,768 INFO L226 Difference]: Without dead ends: 303 [2024-10-11 17:58:28,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=229, Unknown=1, NotChecked=30, Total=306 [2024-10-11 17:58:28,768 INFO L432 NwaCegarLoop]: 93 mSDtfsCounter, 111 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 1616 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 336 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:58:28,769 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 423 Invalid, 1966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1616 Invalid, 0 Unknown, 336 Unchecked, 1.0s Time] [2024-10-11 17:58:28,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2024-10-11 17:58:28,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 211. [2024-10-11 17:58:28,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 115 states have (on average 1.8869565217391304) internal successors, (217), 195 states have internal predecessors, (217), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-11 17:58:28,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 241 transitions. [2024-10-11 17:58:28,790 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 241 transitions. Word has length 71 [2024-10-11 17:58:28,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:58:28,790 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 241 transitions. [2024-10-11 17:58:28,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-11 17:58:28,791 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 241 transitions. [2024-10-11 17:58:28,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-10-11 17:58:28,792 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:58:28,792 INFO L215 NwaCegarLoop]: trace histogram [11, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:58:28,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 17:58:28,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-11 17:58:28,997 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2024-10-11 17:58:28,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:58:28,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1859638106, now seen corresponding path program 1 times [2024-10-11 17:58:28,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:58:28,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191893910] [2024-10-11 17:58:28,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:58:28,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:58:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:29,647 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 17:58:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:29,657 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-11 17:58:29,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:29,669 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-11 17:58:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:29,679 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-10-11 17:58:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:29,758 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-10-11 17:58:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:29,866 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-10-11 17:58:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 117 proven. 25 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-11 17:58:29,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:58:29,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191893910] [2024-10-11 17:58:29,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191893910] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:58:29,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6872456] [2024-10-11 17:58:29,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:58:29,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:58:29,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:58:29,935 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:58:29,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 17:58:30,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:30,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-11 17:58:30,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:58:30,257 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#valid| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|))) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2024-10-11 17:58:30,320 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-10-11 17:58:30,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-10-11 17:58:30,348 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|)) is different from true [2024-10-11 17:58:30,373 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-11 17:58:30,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-10-11 17:58:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 125 proven. 1 refuted. 0 times theorem prover too weak. 65 trivial. 35 not checked. [2024-10-11 17:58:30,383 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:58:30,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6872456] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:58:30,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 17:58:30,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2024-10-11 17:58:30,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800850680] [2024-10-11 17:58:30,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 17:58:30,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 17:58:30,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:58:30,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 17:58:30,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=256, Unknown=2, NotChecked=66, Total=380 [2024-10-11 17:58:30,594 INFO L87 Difference]: Start difference. First operand 211 states and 241 transitions. Second operand has 17 states, 16 states have (on average 3.375) internal successors, (54), 14 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-11 17:58:31,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:58:31,599 INFO L93 Difference]: Finished difference Result 300 states and 350 transitions. [2024-10-11 17:58:31,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 17:58:31,600 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.375) internal successors, (54), 14 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 72 [2024-10-11 17:58:31,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:58:31,602 INFO L225 Difference]: With dead ends: 300 [2024-10-11 17:58:31,602 INFO L226 Difference]: Without dead ends: 300 [2024-10-11 17:58:31,602 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=385, Unknown=2, NotChecked=82, Total=552 [2024-10-11 17:58:31,603 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 324 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 1676 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 2366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 667 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-11 17:58:31,603 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 761 Invalid, 2366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1676 Invalid, 0 Unknown, 667 Unchecked, 0.9s Time] [2024-10-11 17:58:31,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2024-10-11 17:58:31,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 208. [2024-10-11 17:58:31,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 115 states have (on average 1.8608695652173912) internal successors, (214), 192 states have internal predecessors, (214), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-11 17:58:31,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 238 transitions. [2024-10-11 17:58:31,610 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 238 transitions. Word has length 72 [2024-10-11 17:58:31,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:58:31,611 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 238 transitions. [2024-10-11 17:58:31,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.375) internal successors, (54), 14 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-11 17:58:31,611 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 238 transitions. [2024-10-11 17:58:31,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-10-11 17:58:31,612 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:58:31,612 INFO L215 NwaCegarLoop]: trace histogram [11, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:58:31,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 17:58:31,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:58:31,816 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2024-10-11 17:58:31,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:58:31,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1859638107, now seen corresponding path program 1 times [2024-10-11 17:58:31,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:58:31,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874178135] [2024-10-11 17:58:31,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:58:31,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:58:31,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:32,650 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 17:58:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:32,660 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-11 17:58:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:32,669 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-11 17:58:32,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:32,679 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-10-11 17:58:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:32,688 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-10-11 17:58:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:33,112 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-10-11 17:58:33,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 100 proven. 14 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-10-11 17:58:33,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:58:33,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874178135] [2024-10-11 17:58:33,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874178135] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:58:33,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34475431] [2024-10-11 17:58:33,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:58:33,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:58:33,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:58:33,220 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:58:33,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 17:58:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:33,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-10-11 17:58:33,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:58:33,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-10-11 17:58:38,715 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2024-10-11 17:58:38,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 17:58:38,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-11 17:58:38,859 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 17:58:38,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-11 17:58:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 101 proven. 50 refuted. 0 times theorem prover too weak. 70 trivial. 5 not checked. [2024-10-11 17:58:38,927 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:58:39,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34475431] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:58:39,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 17:58:39,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 31 [2024-10-11 17:58:39,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909533811] [2024-10-11 17:58:39,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 17:58:39,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-11 17:58:39,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:58:39,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-11 17:58:39,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=899, Unknown=1, NotChecked=60, Total=1056 [2024-10-11 17:58:39,078 INFO L87 Difference]: Start difference. First operand 208 states and 238 transitions. Second operand has 31 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 25 states have internal predecessors, (56), 3 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2024-10-11 17:58:43,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-11 17:58:46,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:58:46,207 INFO L93 Difference]: Finished difference Result 315 states and 374 transitions. [2024-10-11 17:58:46,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 17:58:46,207 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 25 states have internal predecessors, (56), 3 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 72 [2024-10-11 17:58:46,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:58:46,210 INFO L225 Difference]: With dead ends: 315 [2024-10-11 17:58:46,211 INFO L226 Difference]: Without dead ends: 312 [2024-10-11 17:58:46,212 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=161, Invalid=1402, Unknown=1, NotChecked=76, Total=1640 [2024-10-11 17:58:46,213 INFO L432 NwaCegarLoop]: 101 mSDtfsCounter, 326 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 3600 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 3975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 3600 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 356 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:58:46,214 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 946 Invalid, 3975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 3600 Invalid, 1 Unknown, 356 Unchecked, 6.2s Time] [2024-10-11 17:58:46,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2024-10-11 17:58:46,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 212. [2024-10-11 17:58:46,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 118 states have (on average 1.847457627118644) internal successors, (218), 196 states have internal predecessors, (218), 12 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2024-10-11 17:58:46,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 246 transitions. [2024-10-11 17:58:46,226 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 246 transitions. Word has length 72 [2024-10-11 17:58:46,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:58:46,226 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 246 transitions. [2024-10-11 17:58:46,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 25 states have internal predecessors, (56), 3 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2024-10-11 17:58:46,226 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 246 transitions. [2024-10-11 17:58:46,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-11 17:58:46,227 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:58:46,227 INFO L215 NwaCegarLoop]: trace histogram [12, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:58:46,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 17:58:46,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-11 17:58:46,432 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2024-10-11 17:58:46,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:58:46,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1709276495, now seen corresponding path program 2 times [2024-10-11 17:58:46,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:58:46,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275084635] [2024-10-11 17:58:46,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:58:46,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:58:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:47,214 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 17:58:47,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:47,238 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-11 17:58:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:47,251 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-11 17:58:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:47,264 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-10-11 17:58:47,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:47,278 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-10-11 17:58:47,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:47,663 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-10-11 17:58:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:58:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 112 proven. 19 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-10-11 17:58:47,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:58:47,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275084635] [2024-10-11 17:58:47,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275084635] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:58:47,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697351894] [2024-10-11 17:58:47,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:58:47,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:58:47,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:58:47,771 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:58:47,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 17:58:48,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 17:58:48,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:58:48,432 INFO L255 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-11 17:58:48,436 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:58:48,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-10-11 17:58:53,645 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~ptr~0#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_calloc_model_~ptr~0#1.base| (select |c_#length| |zalloc_or_die_calloc_model_~ptr~0#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_calloc_model_~ptr~0#1.base|) 0))) is different from true [2024-10-11 17:58:53,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 17:58:53,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-11 17:58:53,783 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 17:58:53,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-11 17:58:53,838 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 103 proven. 59 refuted. 0 times theorem prover too weak. 76 trivial. 5 not checked. [2024-10-11 17:58:53,838 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:58:53,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697351894] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:58:53,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 17:58:53,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 34 [2024-10-11 17:58:53,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501023894] [2024-10-11 17:58:53,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 17:58:53,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-11 17:58:53,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:58:53,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-11 17:58:53,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1087, Unknown=1, NotChecked=66, Total=1260 [2024-10-11 17:58:53,952 INFO L87 Difference]: Start difference. First operand 212 states and 246 transitions. Second operand has 34 states, 32 states have (on average 1.84375) internal successors, (59), 28 states have internal predecessors, (59), 3 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2024-10-11 17:58:57,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-11 17:59:01,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:59:01,181 INFO L93 Difference]: Finished difference Result 323 states and 388 transitions. [2024-10-11 17:59:01,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-11 17:59:01,182 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 1.84375) internal successors, (59), 28 states have internal predecessors, (59), 3 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 73 [2024-10-11 17:59:01,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:59:01,183 INFO L225 Difference]: With dead ends: 323 [2024-10-11 17:59:01,184 INFO L226 Difference]: Without dead ends: 320 [2024-10-11 17:59:01,184 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=196, Invalid=1876, Unknown=2, NotChecked=88, Total=2162 [2024-10-11 17:59:01,185 INFO L432 NwaCegarLoop]: 106 mSDtfsCounter, 331 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 3408 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 3793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 3408 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 366 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2024-10-11 17:59:01,185 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 1024 Invalid, 3793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 3408 Invalid, 1 Unknown, 366 Unchecked, 5.9s Time] [2024-10-11 17:59:01,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2024-10-11 17:59:01,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 213. [2024-10-11 17:59:01,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 119 states have (on average 1.8487394957983194) internal successors, (220), 197 states have internal predecessors, (220), 12 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2024-10-11 17:59:01,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 248 transitions. [2024-10-11 17:59:01,199 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 248 transitions. Word has length 73 [2024-10-11 17:59:01,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:59:01,200 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 248 transitions. [2024-10-11 17:59:01,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 1.84375) internal successors, (59), 28 states have internal predecessors, (59), 3 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2024-10-11 17:59:01,200 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 248 transitions. [2024-10-11 17:59:01,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-11 17:59:01,202 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:59:01,202 INFO L215 NwaCegarLoop]: trace histogram [13, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:59:01,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-11 17:59:01,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:59:01,403 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2024-10-11 17:59:01,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:59:01,404 INFO L85 PathProgramCache]: Analyzing trace with hash -676479461, now seen corresponding path program 3 times [2024-10-11 17:59:01,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:59:01,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217088916] [2024-10-11 17:59:01,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:59:01,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:59:01,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:59:02,168 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 17:59:02,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:59:02,177 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-11 17:59:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:59:02,185 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-11 17:59:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:59:02,198 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-10-11 17:59:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:59:02,208 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-10-11 17:59:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:59:02,690 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-11 17:59:02,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:59:02,795 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 124 proven. 25 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-10-11 17:59:02,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:59:02,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217088916] [2024-10-11 17:59:02,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217088916] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:59:02,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147284129] [2024-10-11 17:59:02,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 17:59:02,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:59:02,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:59:02,797 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:59:02,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 17:59:03,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 17:59:03,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:59:03,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-11 17:59:03,046 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:59:03,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 17:59:03,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-11 17:59:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2024-10-11 17:59:03,181 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:59:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2024-10-11 17:59:03,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147284129] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:59:03,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:59:03,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6, 6] total 25 [2024-10-11 17:59:03,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791150853] [2024-10-11 17:59:03,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:59:03,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-11 17:59:03,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:59:03,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-11 17:59:03,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2024-10-11 17:59:03,377 INFO L87 Difference]: Start difference. First operand 213 states and 248 transitions. Second operand has 25 states, 24 states have (on average 2.25) internal successors, (54), 22 states have internal predecessors, (54), 2 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2024-10-11 17:59:05,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:59:05,889 INFO L93 Difference]: Finished difference Result 325 states and 388 transitions. [2024-10-11 17:59:05,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-11 17:59:05,889 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.25) internal successors, (54), 22 states have internal predecessors, (54), 2 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 74 [2024-10-11 17:59:05,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:59:05,891 INFO L225 Difference]: With dead ends: 325 [2024-10-11 17:59:05,891 INFO L226 Difference]: Without dead ends: 316 [2024-10-11 17:59:05,892 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=324, Invalid=1656, Unknown=0, NotChecked=0, Total=1980 [2024-10-11 17:59:05,892 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 348 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 2969 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 3014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-10-11 17:59:05,893 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 877 Invalid, 3014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2969 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-10-11 17:59:05,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-10-11 17:59:05,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 217. [2024-10-11 17:59:05,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 123 states have (on average 1.829268292682927) internal successors, (225), 201 states have internal predecessors, (225), 12 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2024-10-11 17:59:05,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 253 transitions. [2024-10-11 17:59:05,905 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 253 transitions. Word has length 74 [2024-10-11 17:59:05,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:59:05,905 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 253 transitions. [2024-10-11 17:59:05,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.25) internal successors, (54), 22 states have internal predecessors, (54), 2 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2024-10-11 17:59:05,906 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 253 transitions. [2024-10-11 17:59:05,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-10-11 17:59:05,907 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:59:05,907 INFO L215 NwaCegarLoop]: trace histogram [17, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:59:05,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-11 17:59:06,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 17:59:06,108 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2024-10-11 17:59:06,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:59:06,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1230788899, now seen corresponding path program 4 times [2024-10-11 17:59:06,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:59:06,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286360214] [2024-10-11 17:59:06,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:59:06,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:59:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:59:06,842 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 17:59:06,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:59:06,851 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-11 17:59:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:59:06,859 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-11 17:59:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:59:06,866 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-10-11 17:59:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:59:06,873 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-10-11 17:59:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:59:07,397 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-11 17:59:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:59:07,509 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 172 proven. 50 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-10-11 17:59:07,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:59:07,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286360214] [2024-10-11 17:59:07,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286360214] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:59:07,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096257735] [2024-10-11 17:59:07,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 17:59:07,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:59:07,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:59:07,512 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:59:07,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 17:59:08,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 17:59:08,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:59:08,015 INFO L255 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-10-11 17:59:08,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:59:08,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 17:59:08,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 17:59:29,262 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2024-10-11 17:59:29,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 17:59:29,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-11 17:59:29,550 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 17:59:29,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-11 17:59:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 177 proven. 55 refuted. 0 times theorem prover too weak. 106 trivial. 5 not checked. [2024-10-11 17:59:29,585 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:59:29,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096257735] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:59:29,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 17:59:29,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2024-10-11 17:59:29,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078440125] [2024-10-11 17:59:29,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 17:59:29,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-10-11 17:59:29,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:59:29,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-10-11 17:59:29,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1286, Unknown=6, NotChecked=72, Total=1482 [2024-10-11 17:59:29,737 INFO L87 Difference]: Start difference. First operand 217 states and 253 transitions. Second operand has 37 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 31 states have internal predecessors, (62), 3 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2024-10-11 17:59:33,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:59:33,039 INFO L93 Difference]: Finished difference Result 327 states and 395 transitions. [2024-10-11 17:59:33,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-11 17:59:33,039 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 31 states have internal predecessors, (62), 3 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 78 [2024-10-11 17:59:33,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:59:33,041 INFO L225 Difference]: With dead ends: 327 [2024-10-11 17:59:33,041 INFO L226 Difference]: Without dead ends: 324 [2024-10-11 17:59:33,041 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=217, Invalid=2133, Unknown=6, NotChecked=94, Total=2450 [2024-10-11 17:59:33,042 INFO L432 NwaCegarLoop]: 105 mSDtfsCounter, 320 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 4131 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 4512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 4131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 365 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-10-11 17:59:33,042 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 859 Invalid, 4512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 4131 Invalid, 0 Unknown, 365 Unchecked, 2.4s Time] [2024-10-11 17:59:33,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2024-10-11 17:59:33,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 218. [2024-10-11 17:59:33,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 124 states have (on average 1.8306451612903225) internal successors, (227), 202 states have internal predecessors, (227), 12 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2024-10-11 17:59:33,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 255 transitions. [2024-10-11 17:59:33,049 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 255 transitions. Word has length 78 [2024-10-11 17:59:33,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:59:33,049 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 255 transitions. [2024-10-11 17:59:33,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 31 states have internal predecessors, (62), 3 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2024-10-11 17:59:33,050 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 255 transitions. [2024-10-11 17:59:33,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-10-11 17:59:33,050 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:59:33,051 INFO L215 NwaCegarLoop]: trace histogram [18, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:59:33,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-11 17:59:33,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:59:33,251 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2024-10-11 17:59:33,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:59:33,252 INFO L85 PathProgramCache]: Analyzing trace with hash -45941325, now seen corresponding path program 5 times [2024-10-11 17:59:33,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:59:33,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874769761] [2024-10-11 17:59:33,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:59:33,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:59:33,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:59:33,935 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 17:59:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:59:33,942 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-11 17:59:33,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:59:33,950 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-11 17:59:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:59:33,957 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-10-11 17:59:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:59:33,965 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-10-11 17:59:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:59:34,560 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-10-11 17:59:34,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:59:34,693 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 184 proven. 61 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-10-11 17:59:34,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:59:34,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874769761] [2024-10-11 17:59:34,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874769761] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:59:34,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128157880] [2024-10-11 17:59:34,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 17:59:34,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:59:34,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:59:34,696 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:59:34,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 17:59:34,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 17:59:34,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:59:34,961 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-11 17:59:34,963 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:59:34,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 17:59:35,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-11 17:59:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 170 proven. 3 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2024-10-11 17:59:36,821 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:59:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 14 proven. 77 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2024-10-11 17:59:37,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128157880] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:59:37,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:59:37,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7, 7] total 29 [2024-10-11 17:59:37,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948491978] [2024-10-11 17:59:37,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:59:37,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-11 17:59:37,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:59:37,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-11 17:59:37,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2024-10-11 17:59:37,480 INFO L87 Difference]: Start difference. First operand 218 states and 255 transitions. Second operand has 29 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 26 states have internal predecessors, (71), 3 states have call successors, (16), 3 states have call predecessors, (16), 6 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16)