./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0235-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0235-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5243781ee83706d005235269371a592cabf9c2dbc613c235cbe81d6e89d326d7 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 07:44:47,862 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 07:44:47,932 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 07:44:47,937 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 07:44:47,938 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 07:44:47,966 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 07:44:47,967 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 07:44:47,968 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 07:44:47,969 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 07:44:47,970 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 07:44:47,970 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 07:44:47,970 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 07:44:47,971 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 07:44:47,973 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 07:44:47,974 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 07:44:47,974 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 07:44:47,974 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 07:44:47,975 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 07:44:47,975 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 07:44:47,975 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 07:44:47,975 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 07:44:47,979 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 07:44:47,980 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 07:44:47,980 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 07:44:47,980 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 07:44:47,980 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 07:44:47,980 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 07:44:47,981 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 07:44:47,981 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 07:44:47,981 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 07:44:47,981 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 07:44:47,982 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 07:44:47,982 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 07:44:47,982 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 07:44:47,982 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 07:44:47,983 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 07:44:47,983 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 07:44:47,983 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 07:44:47,985 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 07:44:47,986 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 07:44:47,986 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 07:44:47,986 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 07:44:47,986 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5243781ee83706d005235269371a592cabf9c2dbc613c235cbe81d6e89d326d7 [2024-11-09 07:44:48,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 07:44:48,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 07:44:48,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 07:44:48,269 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 07:44:48,270 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 07:44:48,271 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0235-2.i [2024-11-09 07:44:49,742 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 07:44:49,979 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 07:44:49,981 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0235-2.i [2024-11-09 07:44:49,998 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7caa12a2d/3452dcfadcb746998b0ad57b4e55d4b9/FLAGd0b77ee34 [2024-11-09 07:44:50,010 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7caa12a2d/3452dcfadcb746998b0ad57b4e55d4b9 [2024-11-09 07:44:50,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 07:44:50,014 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 07:44:50,018 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 07:44:50,018 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 07:44:50,023 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 07:44:50,024 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:44:50" (1/1) ... [2024-11-09 07:44:50,025 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c3bdd3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:44:50, skipping insertion in model container [2024-11-09 07:44:50,025 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:44:50" (1/1) ... [2024-11-09 07:44:50,080 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 07:44:50,486 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:44:50,498 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 07:44:50,556 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:44:50,607 INFO L204 MainTranslator]: Completed translation [2024-11-09 07:44:50,608 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:44:50 WrapperNode [2024-11-09 07:44:50,608 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 07:44:50,609 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 07:44:50,610 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 07:44:50,610 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 07:44:50,617 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:44:50" (1/1) ... [2024-11-09 07:44:50,639 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:44:50" (1/1) ... [2024-11-09 07:44:50,677 INFO L138 Inliner]: procedures = 188, calls = 71, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 243 [2024-11-09 07:44:50,678 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 07:44:50,679 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 07:44:50,679 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 07:44:50,679 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 07:44:50,691 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:44:50" (1/1) ... [2024-11-09 07:44:50,691 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:44:50" (1/1) ... [2024-11-09 07:44:50,696 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:44:50" (1/1) ... [2024-11-09 07:44:50,747 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]. [2024-11-09 07:44:50,751 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:44:50" (1/1) ... [2024-11-09 07:44:50,752 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:44:50" (1/1) ... [2024-11-09 07:44:50,762 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:44:50" (1/1) ... [2024-11-09 07:44:50,766 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:44:50" (1/1) ... [2024-11-09 07:44:50,770 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:44:50" (1/1) ... [2024-11-09 07:44:50,772 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:44:50" (1/1) ... [2024-11-09 07:44:50,776 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 07:44:50,777 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 07:44:50,777 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 07:44:50,777 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 07:44:50,779 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:44:50" (1/1) ... [2024-11-09 07:44:50,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 07:44:50,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:44:50,814 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 07:44:50,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 07:44:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 07:44:50,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 07:44:50,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-09 07:44:50,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-09 07:44:50,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-09 07:44:50,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-09 07:44:50,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-09 07:44:50,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-09 07:44:50,870 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2024-11-09 07:44:50,870 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2024-11-09 07:44:50,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 07:44:50,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-09 07:44:50,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-09 07:44:50,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-09 07:44:50,871 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2024-11-09 07:44:50,871 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2024-11-09 07:44:50,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 07:44:50,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 07:44:50,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-09 07:44:50,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 07:44:50,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 07:44:51,057 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 07:44:51,059 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 07:44:51,684 INFO L? ?]: Removed 203 outVars from TransFormulas that were not future-live. [2024-11-09 07:44:51,684 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 07:44:51,708 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 07:44:51,710 INFO L316 CfgBuilder]: Removed 10 assume(true) statements. [2024-11-09 07:44:51,711 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:44:51 BoogieIcfgContainer [2024-11-09 07:44:51,711 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 07:44:51,714 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 07:44:51,714 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 07:44:51,718 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 07:44:51,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 07:44:50" (1/3) ... [2024-11-09 07:44:51,719 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8c8eb30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:44:51, skipping insertion in model container [2024-11-09 07:44:51,719 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:44:50" (2/3) ... [2024-11-09 07:44:51,720 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8c8eb30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:44:51, skipping insertion in model container [2024-11-09 07:44:51,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:44:51" (3/3) ... [2024-11-09 07:44:51,722 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0235-2.i [2024-11-09 07:44:51,741 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 07:44:51,741 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 87 error locations. [2024-11-09 07:44:51,795 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 07:44:51,802 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;@769f8b52, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 07:44:51,802 INFO L334 AbstractCegarLoop]: Starting to check reachability of 87 error locations. [2024-11-09 07:44:51,806 INFO L276 IsEmpty]: Start isEmpty. Operand has 238 states, 136 states have (on average 1.875) internal successors, (255), 223 states have internal predecessors, (255), 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) [2024-11-09 07:44:51,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-09 07:44:51,812 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:44:51,813 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-09 07:44:51,814 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)] === [2024-11-09 07:44:51,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:44:51,822 INFO L85 PathProgramCache]: Analyzing trace with hash 7887302, now seen corresponding path program 1 times [2024-11-09 07:44:51,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:44:51,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828991756] [2024-11-09 07:44:51,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:44:51,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:44:51,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:44:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:44:51,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:44:51,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828991756] [2024-11-09 07:44:51,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828991756] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:44:51,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:44:51,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 07:44:51,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757956618] [2024-11-09 07:44:52,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:44:52,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 07:44:52,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:44:52,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 07:44:52,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 07:44:52,058 INFO L87 Difference]: Start difference. First operand has 238 states, 136 states have (on average 1.875) internal successors, (255), 223 states have internal predecessors, (255), 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 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:44:52,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:44:52,105 INFO L93 Difference]: Finished difference Result 238 states and 268 transitions. [2024-11-09 07:44:52,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 07:44:52,110 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-09 07:44:52,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:44:52,125 INFO L225 Difference]: With dead ends: 238 [2024-11-09 07:44:52,126 INFO L226 Difference]: Without dead ends: 236 [2024-11-09 07:44:52,128 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 [2024-11-09 07:44:52,133 INFO L432 NwaCegarLoop]: 268 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:44:52,134 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 07:44:52,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-11-09 07:44:52,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2024-11-09 07:44:52,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 135 states have (on average 1.7925925925925925) internal successors, (242), 221 states have internal predecessors, (242), 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) [2024-11-09 07:44:52,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 266 transitions. [2024-11-09 07:44:52,194 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 266 transitions. Word has length 4 [2024-11-09 07:44:52,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:44:52,195 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 266 transitions. [2024-11-09 07:44:52,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:44:52,195 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 266 transitions. [2024-11-09 07:44:52,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 07:44:52,196 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:44:52,196 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 07:44:52,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 07:44:52,197 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)] === [2024-11-09 07:44:52,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:44:52,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1014365960, now seen corresponding path program 1 times [2024-11-09 07:44:52,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:44:52,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928395463] [2024-11-09 07:44:52,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:44:52,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:44:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:44:52,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:44:52,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:44:52,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928395463] [2024-11-09 07:44:52,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928395463] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:44:52,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:44:52,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 07:44:52,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095543263] [2024-11-09 07:44:52,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:44:52,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:44:52,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:44:52,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:44:52,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:44:52,394 INFO L87 Difference]: Start difference. First operand 236 states and 266 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:44:52,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:44:52,577 INFO L93 Difference]: Finished difference Result 235 states and 265 transitions. [2024-11-09 07:44:52,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:44:52,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-09 07:44:52,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:44:52,579 INFO L225 Difference]: With dead ends: 235 [2024-11-09 07:44:52,579 INFO L226 Difference]: Without dead ends: 235 [2024-11-09 07:44:52,580 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:44:52,581 INFO L432 NwaCegarLoop]: 260 mSDtfsCounter, 4 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:44:52,581 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 437 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:44:52,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-11-09 07:44:52,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2024-11-09 07:44:52,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 135 states have (on average 1.7851851851851852) internal successors, (241), 220 states have internal predecessors, (241), 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) [2024-11-09 07:44:52,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 265 transitions. [2024-11-09 07:44:52,605 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 265 transitions. Word has length 6 [2024-11-09 07:44:52,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:44:52,606 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 265 transitions. [2024-11-09 07:44:52,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:44:52,606 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 265 transitions. [2024-11-09 07:44:52,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 07:44:52,606 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:44:52,607 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:44:52,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 07:44:52,607 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)] === [2024-11-09 07:44:52,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:44:52,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1380573448, now seen corresponding path program 1 times [2024-11-09 07:44:52,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:44:52,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706995735] [2024-11-09 07:44:52,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:44:52,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:44:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:44:52,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582325921] [2024-11-09 07:44:52,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:44:52,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:44:52,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:44:52,642 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:44:52,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 07:44:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:44:52,759 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 07:44:52,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:44:52,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 07:44:52,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:44:52,901 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:44:52,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:44:52,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706995735] [2024-11-09 07:44:52,902 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:44:52,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582325921] [2024-11-09 07:44:52,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582325921] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:44:52,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:44:52,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:44:52,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140345500] [2024-11-09 07:44:52,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:44:52,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:44:52,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:44:52,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:44:52,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:44:52,905 INFO L87 Difference]: Start difference. First operand 235 states and 265 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:44:53,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:44:53,085 INFO L93 Difference]: Finished difference Result 244 states and 274 transitions. [2024-11-09 07:44:53,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:44:53,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 07:44:53,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:44:53,088 INFO L225 Difference]: With dead ends: 244 [2024-11-09 07:44:53,088 INFO L226 Difference]: Without dead ends: 244 [2024-11-09 07:44:53,089 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:44:53,091 INFO L432 NwaCegarLoop]: 255 mSDtfsCounter, 11 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:44:53,091 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 694 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:44:53,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2024-11-09 07:44:53,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2024-11-09 07:44:53,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 143 states have (on average 1.7482517482517483) internal successors, (250), 228 states have internal predecessors, (250), 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) [2024-11-09 07:44:53,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 274 transitions. [2024-11-09 07:44:53,112 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 274 transitions. Word has length 7 [2024-11-09 07:44:53,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:44:53,112 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 274 transitions. [2024-11-09 07:44:53,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:44:53,113 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 274 transitions. [2024-11-09 07:44:53,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-09 07:44:53,114 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:44:53,115 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 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, 1] [2024-11-09 07:44:53,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 07:44:53,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:44:53,316 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)] === [2024-11-09 07:44:53,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:44:53,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1507517037, now seen corresponding path program 1 times [2024-11-09 07:44:53,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:44:53,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844015114] [2024-11-09 07:44:53,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:44:53,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:44:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:44:53,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2088446482] [2024-11-09 07:44:53,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:44:53,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:44:53,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:44:53,485 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:44:53,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 07:44:53,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:44:53,681 INFO L255 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-09 07:44:53,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:44:53,725 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 [2024-11-09 07:44:53,782 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 [2024-11-09 07:44:53,858 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 07:44:53,862 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:44:53,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:44:53,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844015114] [2024-11-09 07:44:53,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:44:53,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088446482] [2024-11-09 07:44:53,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088446482] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:44:53,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:44:53,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 07:44:53,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087048585] [2024-11-09 07:44:53,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:44:53,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:44:53,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:44:53,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:44:53,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:44:53,869 INFO L87 Difference]: Start difference. First operand 244 states and 274 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 07:44:54,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:44:54,040 INFO L93 Difference]: Finished difference Result 256 states and 286 transitions. [2024-11-09 07:44:54,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 07:44:54,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2024-11-09 07:44:54,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:44:54,042 INFO L225 Difference]: With dead ends: 256 [2024-11-09 07:44:54,043 INFO L226 Difference]: Without dead ends: 246 [2024-11-09 07:44:54,043 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:44:54,044 INFO L432 NwaCegarLoop]: 260 mSDtfsCounter, 3 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:44:54,046 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 950 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:44:54,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2024-11-09 07:44:54,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2024-11-09 07:44:54,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 145 states have (on average 1.7379310344827585) internal successors, (252), 230 states have internal predecessors, (252), 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) [2024-11-09 07:44:54,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 276 transitions. [2024-11-09 07:44:54,064 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 276 transitions. Word has length 66 [2024-11-09 07:44:54,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:44:54,065 INFO L471 AbstractCegarLoop]: Abstraction has 246 states and 276 transitions. [2024-11-09 07:44:54,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 07:44:54,065 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 276 transitions. [2024-11-09 07:44:54,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-09 07:44:54,067 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:44:54,067 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 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, 1] [2024-11-09 07:44:54,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 07:44:54,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-09 07:44:54,272 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2024-11-09 07:44:54,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:44:54,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1682868603, now seen corresponding path program 1 times [2024-11-09 07:44:54,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:44:54,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129704494] [2024-11-09 07:44:54,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:44:54,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:44:54,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:44:54,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104160699] [2024-11-09 07:44:54,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:44:54,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:44:54,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:44:54,531 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:44:54,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 07:44:54,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:44:54,796 INFO L255 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 07:44:54,802 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:44:54,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 07:44:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2024-11-09 07:44:54,862 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:44:54,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:44:54,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129704494] [2024-11-09 07:44:54,864 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:44:54,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104160699] [2024-11-09 07:44:54,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104160699] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:44:54,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:44:54,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:44:54,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970747734] [2024-11-09 07:44:54,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:44:54,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:44:54,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:44:54,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:44:54,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:44:54,868 INFO L87 Difference]: Start difference. First operand 246 states and 276 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-09 07:44:55,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:44:55,017 INFO L93 Difference]: Finished difference Result 245 states and 275 transitions. [2024-11-09 07:44:55,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:44:55,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 71 [2024-11-09 07:44:55,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:44:55,023 INFO L225 Difference]: With dead ends: 245 [2024-11-09 07:44:55,023 INFO L226 Difference]: Without dead ends: 245 [2024-11-09 07:44:55,024 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:44:55,024 INFO L432 NwaCegarLoop]: 267 mSDtfsCounter, 11 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:44:55,025 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 716 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:44:55,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-11-09 07:44:55,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2024-11-09 07:44:55,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 145 states have (on average 1.7310344827586206) internal successors, (251), 229 states have internal predecessors, (251), 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) [2024-11-09 07:44:55,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 275 transitions. [2024-11-09 07:44:55,041 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 275 transitions. Word has length 71 [2024-11-09 07:44:55,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:44:55,044 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 275 transitions. [2024-11-09 07:44:55,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-09 07:44:55,044 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 275 transitions. [2024-11-09 07:44:55,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-09 07:44:55,048 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:44:55,048 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2024-11-09 07:44:55,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 07:44:55,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:44:55,253 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2024-11-09 07:44:55,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:44:55,253 INFO L85 PathProgramCache]: Analyzing trace with hash 2058394538, now seen corresponding path program 1 times [2024-11-09 07:44:55,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:44:55,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797149312] [2024-11-09 07:44:55,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:44:55,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:44:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:44:55,686 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 07:44:55,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:44:55,701 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 07:44:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:44:55,714 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-09 07:44:55,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:44:55,731 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-09 07:44:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:44:55,742 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-11-09 07:44:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:44:55,838 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-11-09 07:44:55,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:44:55,957 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 88 proven. 11 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-11-09 07:44:55,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:44:55,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797149312] [2024-11-09 07:44:55,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797149312] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:44:55,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116943917] [2024-11-09 07:44:55,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:44:55,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:44:55,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:44:55,961 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:44:55,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 07:44:56,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:44:56,173 INFO L255 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 07:44:56,178 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:44:56,284 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 [2024-11-09 07:44:56,334 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-09 07:44:56,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-09 07:44:56,345 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 93 proven. 1 refuted. 0 times theorem prover too weak. 82 trivial. 10 not checked. [2024-11-09 07:44:56,346 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:44:56,619 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 07:44:56,620 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 [2024-11-09 07:44:56,641 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 93 proven. 11 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2024-11-09 07:44:56,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116943917] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:44:56,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:44:56,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 17 [2024-11-09 07:44:56,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163428614] [2024-11-09 07:44:56,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:44:56,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 07:44:56,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:44:56,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 07:44:56,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=224, Unknown=1, NotChecked=30, Total=306 [2024-11-09 07:44:56,648 INFO L87 Difference]: Start difference. First operand 245 states and 275 transitions. Second operand has 18 states, 17 states have (on average 3.823529411764706) internal successors, (65), 15 states have internal predecessors, (65), 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) [2024-11-09 07:44:57,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:44:57,905 INFO L93 Difference]: Finished difference Result 344 states and 394 transitions. [2024-11-09 07:44:57,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 07:44:57,906 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.823529411764706) internal successors, (65), 15 states have internal predecessors, (65), 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 79 [2024-11-09 07:44:57,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:44:57,911 INFO L225 Difference]: With dead ends: 344 [2024-11-09 07:44:57,911 INFO L226 Difference]: Without dead ends: 344 [2024-11-09 07:44:57,912 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 158 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=344, Unknown=1, NotChecked=38, Total=462 [2024-11-09 07:44:57,913 INFO L432 NwaCegarLoop]: 129 mSDtfsCounter, 233 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 2066 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 2455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:44:57,914 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 1360 Invalid, 2455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2066 Invalid, 0 Unknown, 375 Unchecked, 1.1s Time] [2024-11-09 07:44:57,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2024-11-09 07:44:57,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 243. [2024-11-09 07:44:57,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 145 states have (on average 1.717241379310345) internal successors, (249), 227 states have internal predecessors, (249), 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) [2024-11-09 07:44:57,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 273 transitions. [2024-11-09 07:44:57,927 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 273 transitions. Word has length 79 [2024-11-09 07:44:57,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:44:57,927 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 273 transitions. [2024-11-09 07:44:57,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.823529411764706) internal successors, (65), 15 states have internal predecessors, (65), 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) [2024-11-09 07:44:57,928 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 273 transitions. [2024-11-09 07:44:57,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-09 07:44:57,930 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:44:57,931 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2024-11-09 07:44:57,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 07:44:58,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:44:58,132 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2024-11-09 07:44:58,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:44:58,132 INFO L85 PathProgramCache]: Analyzing trace with hash 2058394539, now seen corresponding path program 1 times [2024-11-09 07:44:58,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:44:58,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219511596] [2024-11-09 07:44:58,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:44:58,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:44:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:44:58,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573069366] [2024-11-09 07:44:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:44:58,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:44:58,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:44:58,299 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:44:58,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 07:44:58,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:44:58,586 INFO L255 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-09 07:44:58,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:44:58,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 07:44:58,658 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 [2024-11-09 07:44:58,732 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 56 proven. 16 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2024-11-09 07:44:58,732 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:44:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-11-09 07:44:58,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:44:58,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219511596] [2024-11-09 07:44:58,936 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:44:58,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573069366] [2024-11-09 07:44:58,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573069366] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:44:58,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:44:58,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2024-11-09 07:44:58,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207216687] [2024-11-09 07:44:58,939 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:44:58,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 07:44:58,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:44:58,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 07:44:58,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-09 07:44:58,940 INFO L87 Difference]: Start difference. First operand 243 states and 273 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2024-11-09 07:44:59,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:44:59,266 INFO L93 Difference]: Finished difference Result 262 states and 293 transitions. [2024-11-09 07:44:59,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 07:44:59,266 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 79 [2024-11-09 07:44:59,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:44:59,268 INFO L225 Difference]: With dead ends: 262 [2024-11-09 07:44:59,268 INFO L226 Difference]: Without dead ends: 247 [2024-11-09 07:44:59,268 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2024-11-09 07:44:59,269 INFO L432 NwaCegarLoop]: 252 mSDtfsCounter, 24 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:44:59,269 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 1181 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:44:59,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-11-09 07:44:59,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2024-11-09 07:44:59,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 149 states have (on average 1.6979865771812082) internal successors, (253), 231 states have internal predecessors, (253), 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) [2024-11-09 07:44:59,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 277 transitions. [2024-11-09 07:44:59,277 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 277 transitions. Word has length 79 [2024-11-09 07:44:59,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:44:59,279 INFO L471 AbstractCegarLoop]: Abstraction has 247 states and 277 transitions. [2024-11-09 07:44:59,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2024-11-09 07:44:59,279 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 277 transitions. [2024-11-09 07:44:59,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-09 07:44:59,283 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:44:59,283 INFO L215 NwaCegarLoop]: trace histogram [14, 6, 6, 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] [2024-11-09 07:44:59,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 07:44:59,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:44:59,483 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2024-11-09 07:44:59,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:44:59,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1119355149, now seen corresponding path program 2 times [2024-11-09 07:44:59,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:44:59,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051027366] [2024-11-09 07:44:59,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:44:59,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:44:59,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:44:59,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1670467177] [2024-11-09 07:44:59,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 07:44:59,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:44:59,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:44:59,655 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:44:59,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 07:45:00,090 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 07:45:00,091 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:45:00,096 INFO L255 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-09 07:45:00,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:45:00,125 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 [2024-11-09 07:45:00,375 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 [2024-11-09 07:45:00,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:45:00,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 07:45:00,458 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 07:45:00,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 07:45:00,474 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 22 not checked. [2024-11-09 07:45:00,474 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:45:00,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:45:00,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051027366] [2024-11-09 07:45:00,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:45:00,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670467177] [2024-11-09 07:45:00,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670467177] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:45:00,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:45:00,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-11-09 07:45:00,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24723974] [2024-11-09 07:45:00,584 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 07:45:00,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 07:45:00,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:45:00,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 07:45:00,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=153, Unknown=1, NotChecked=24, Total=210 [2024-11-09 07:45:00,587 INFO L87 Difference]: Start difference. First operand 247 states and 277 transitions. Second operand has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 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) [2024-11-09 07:45:02,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:45:02,284 INFO L93 Difference]: Finished difference Result 346 states and 396 transitions. [2024-11-09 07:45:02,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 07:45:02,285 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 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 87 [2024-11-09 07:45:02,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:45:02,287 INFO L225 Difference]: With dead ends: 346 [2024-11-09 07:45:02,287 INFO L226 Difference]: Without dead ends: 346 [2024-11-09 07:45:02,287 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=328, Unknown=1, NotChecked=36, Total=420 [2024-11-09 07:45:02,287 INFO L432 NwaCegarLoop]: 121 mSDtfsCounter, 120 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 2159 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 2545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:45:02,288 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 651 Invalid, 2545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2159 Invalid, 0 Unknown, 372 Unchecked, 1.5s Time] [2024-11-09 07:45:02,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2024-11-09 07:45:02,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 245. [2024-11-09 07:45:02,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 149 states have (on average 1.6845637583892616) internal successors, (251), 229 states have internal predecessors, (251), 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) [2024-11-09 07:45:02,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 275 transitions. [2024-11-09 07:45:02,300 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 275 transitions. Word has length 87 [2024-11-09 07:45:02,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:45:02,301 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 275 transitions. [2024-11-09 07:45:02,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 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) [2024-11-09 07:45:02,301 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 275 transitions. [2024-11-09 07:45:02,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-09 07:45:02,302 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:45:02,303 INFO L215 NwaCegarLoop]: trace histogram [14, 6, 6, 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, 1, 1] [2024-11-09 07:45:02,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 07:45:02,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:45:02,504 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2024-11-09 07:45:02,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:45:02,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1958480685, now seen corresponding path program 1 times [2024-11-09 07:45:02,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:45:02,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951306547] [2024-11-09 07:45:02,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:45:02,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:45:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:45:03,201 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 07:45:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:45:03,211 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-09 07:45:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:45:03,222 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-09 07:45:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:45:03,232 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-11-09 07:45:03,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:45:03,317 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-09 07:45:03,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:45:03,440 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-11-09 07:45:03,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:45:03,543 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 162 proven. 38 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-09 07:45:03,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:45:03,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951306547] [2024-11-09 07:45:03,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951306547] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:45:03,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876718088] [2024-11-09 07:45:03,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:45:03,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:45:03,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:45:03,546 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:45:03,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 07:45:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:45:03,815 INFO L255 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-09 07:45:03,819 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:45:03,890 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 [2024-11-09 07:45:03,915 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-09 07:45:03,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-09 07:45:03,967 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-09 07:45:03,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-09 07:45:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 170 proven. 2 refuted. 0 times theorem prover too weak. 102 trivial. 36 not checked. [2024-11-09 07:45:03,981 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:45:04,326 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 07:45:04,326 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 [2024-11-09 07:45:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 170 proven. 38 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2024-11-09 07:45:04,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876718088] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:45:04,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:45:04,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 18 [2024-11-09 07:45:04,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036107991] [2024-11-09 07:45:04,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:45:04,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 07:45:04,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:45:04,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 07:45:04,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=256, Unknown=1, NotChecked=32, Total=342 [2024-11-09 07:45:04,345 INFO L87 Difference]: Start difference. First operand 245 states and 275 transitions. Second operand has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 16 states have internal predecessors, (67), 2 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-09 07:45:05,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:45:05,538 INFO L93 Difference]: Finished difference Result 343 states and 393 transitions. [2024-11-09 07:45:05,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 07:45:05,539 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 16 states have internal predecessors, (67), 2 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 89 [2024-11-09 07:45:05,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:45:05,540 INFO L225 Difference]: With dead ends: 343 [2024-11-09 07:45:05,540 INFO L226 Difference]: Without dead ends: 343 [2024-11-09 07:45:05,541 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 176 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=424, Unknown=1, NotChecked=42, Total=552 [2024-11-09 07:45:05,541 INFO L432 NwaCegarLoop]: 118 mSDtfsCounter, 248 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 2073 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 1280 SdHoareTripleChecker+Invalid, 2461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 370 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:45:05,541 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 1280 Invalid, 2461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2073 Invalid, 0 Unknown, 370 Unchecked, 1.0s Time] [2024-11-09 07:45:05,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2024-11-09 07:45:05,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 242. [2024-11-09 07:45:05,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 149 states have (on average 1.6644295302013423) internal successors, (248), 226 states have internal predecessors, (248), 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) [2024-11-09 07:45:05,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 272 transitions. [2024-11-09 07:45:05,551 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 272 transitions. Word has length 89 [2024-11-09 07:45:05,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:45:05,553 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 272 transitions. [2024-11-09 07:45:05,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 16 states have internal predecessors, (67), 2 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-09 07:45:05,553 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 272 transitions. [2024-11-09 07:45:05,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-09 07:45:05,557 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:45:05,557 INFO L215 NwaCegarLoop]: trace histogram [14, 6, 6, 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, 1, 1] [2024-11-09 07:45:05,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 07:45:05,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:45:05,758 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)] === [2024-11-09 07:45:05,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:45:05,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1958480686, now seen corresponding path program 1 times [2024-11-09 07:45:05,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:45:05,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499557537] [2024-11-09 07:45:05,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:45:05,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:45:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:45:06,634 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 07:45:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:45:06,645 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-09 07:45:06,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:45:06,654 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-09 07:45:06,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:45:06,664 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-11-09 07:45:06,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:45:06,674 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-09 07:45:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:45:07,148 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-11-09 07:45:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:45:07,279 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 152 proven. 25 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2024-11-09 07:45:07,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:45:07,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499557537] [2024-11-09 07:45:07,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499557537] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:45:07,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68438271] [2024-11-09 07:45:07,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:45:07,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:45:07,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:45:07,281 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:45:07,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 07:45:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:45:07,865 INFO L255 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-09 07:45:07,870 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:45:07,939 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 [2024-11-09 07:45:08,843 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 [2024-11-09 07:45:09,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:45:09,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 07:45:09,185 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 07:45:09,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 07:45:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 140 proven. 80 refuted. 0 times theorem prover too weak. 83 trivial. 7 not checked. [2024-11-09 07:45:09,228 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:45:09,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68438271] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:45:09,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:45:09,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 38 [2024-11-09 07:45:09,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546982122] [2024-11-09 07:45:09,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:45:09,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-09 07:45:09,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:45:09,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-09 07:45:09,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1371, Unknown=1, NotChecked=74, Total=1560 [2024-11-09 07:45:09,393 INFO L87 Difference]: Start difference. First operand 242 states and 272 transitions. Second operand has 38 states, 36 states have (on average 2.0) internal successors, (72), 32 states have internal predecessors, (72), 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) [2024-11-09 07:45:13,436 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] [2024-11-09 07:45:17,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:45:17,498 INFO L93 Difference]: Finished difference Result 355 states and 413 transitions. [2024-11-09 07:45:17,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 07:45:17,499 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.0) internal successors, (72), 32 states have internal predecessors, (72), 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 89 [2024-11-09 07:45:17,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:45:17,501 INFO L225 Difference]: With dead ends: 355 [2024-11-09 07:45:17,501 INFO L226 Difference]: Without dead ends: 352 [2024-11-09 07:45:17,502 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=219, Invalid=2234, Unknown=1, NotChecked=96, Total=2550 [2024-11-09 07:45:17,502 INFO L432 NwaCegarLoop]: 139 mSDtfsCounter, 359 mSDsluCounter, 1682 mSDsCounter, 0 mSdLazyCounter, 5434 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 1821 SdHoareTripleChecker+Invalid, 5842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 5434 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 391 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:45:17,502 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 1821 Invalid, 5842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 5434 Invalid, 1 Unknown, 391 Unchecked, 7.0s Time] [2024-11-09 07:45:17,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2024-11-09 07:45:17,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 248. [2024-11-09 07:45:17,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 154 states have (on average 1.6493506493506493) internal successors, (254), 232 states have internal predecessors, (254), 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) [2024-11-09 07:45:17,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 282 transitions. [2024-11-09 07:45:17,511 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 282 transitions. Word has length 89 [2024-11-09 07:45:17,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:45:17,512 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 282 transitions. [2024-11-09 07:45:17,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.0) internal successors, (72), 32 states have internal predecessors, (72), 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) [2024-11-09 07:45:17,512 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 282 transitions. [2024-11-09 07:45:17,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-09 07:45:17,513 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:45:17,513 INFO L215 NwaCegarLoop]: trace histogram [15, 6, 6, 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, 1, 1] [2024-11-09 07:45:17,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 07:45:17,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 07:45:17,718 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)] === [2024-11-09 07:45:17,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:45:17,718 INFO L85 PathProgramCache]: Analyzing trace with hash 314938362, now seen corresponding path program 2 times [2024-11-09 07:45:17,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:45:17,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757098870] [2024-11-09 07:45:17,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:45:17,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:45:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:45:18,549 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 07:45:18,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:45:18,558 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-09 07:45:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:45:18,568 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-09 07:45:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:45:18,577 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-11-09 07:45:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:45:18,585 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-09 07:45:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:45:19,059 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-11-09 07:45:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:45:19,193 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 164 proven. 33 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2024-11-09 07:45:19,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:45:19,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757098870] [2024-11-09 07:45:19,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757098870] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:45:19,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232392973] [2024-11-09 07:45:19,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 07:45:19,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:45:19,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:45:19,196 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:45:19,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 07:45:19,583 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 07:45:19,583 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:45:19,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-09 07:45:19,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:45:19,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 07:45:35,050 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 [2024-11-09 07:45:35,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:45:35,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 07:45:35,346 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 07:45:35,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 07:45:35,389 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 144 proven. 91 refuted. 0 times theorem prover too weak. 88 trivial. 7 not checked. [2024-11-09 07:45:35,389 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:45:35,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232392973] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:45:35,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:45:35,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25] total 41 [2024-11-09 07:45:35,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142438507] [2024-11-09 07:45:35,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:45:35,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-09 07:45:35,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:45:35,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-09 07:45:35,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1595, Unknown=4, NotChecked=80, Total=1806 [2024-11-09 07:45:35,549 INFO L87 Difference]: Start difference. First operand 248 states and 282 transitions. Second operand has 41 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 35 states have internal predecessors, (74), 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) [2024-11-09 07:45:39,605 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] [2024-11-09 07:46:04,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-09 07:46:08,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:46:08,307 INFO L93 Difference]: Finished difference Result 358 states and 417 transitions. [2024-11-09 07:46:08,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 07:46:08,308 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 35 states have internal predecessors, (74), 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 90 [2024-11-09 07:46:08,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:46:08,309 INFO L225 Difference]: With dead ends: 358 [2024-11-09 07:46:08,309 INFO L226 Difference]: Without dead ends: 355 [2024-11-09 07:46:08,310 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 36.6s TimeCoverageRelationStatistics Valid=250, Invalid=2608, Unknown=8, NotChecked=104, Total=2970 [2024-11-09 07:46:08,314 INFO L432 NwaCegarLoop]: 139 mSDtfsCounter, 352 mSDsluCounter, 1783 mSDsCounter, 0 mSdLazyCounter, 5482 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 1922 SdHoareTripleChecker+Invalid, 5889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 5482 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 389 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2024-11-09 07:46:08,314 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 1922 Invalid, 5889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 5482 Invalid, 2 Unknown, 389 Unchecked, 11.9s Time] [2024-11-09 07:46:08,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2024-11-09 07:46:08,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 249. [2024-11-09 07:46:08,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 155 states have (on average 1.6516129032258065) internal successors, (256), 233 states have internal predecessors, (256), 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) [2024-11-09 07:46:08,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 284 transitions. [2024-11-09 07:46:08,323 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 284 transitions. Word has length 90 [2024-11-09 07:46:08,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:46:08,324 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 284 transitions. [2024-11-09 07:46:08,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 35 states have internal predecessors, (74), 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) [2024-11-09 07:46:08,324 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 284 transitions. [2024-11-09 07:46:08,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-09 07:46:08,325 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:46:08,325 INFO L215 NwaCegarLoop]: trace histogram [16, 6, 6, 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, 1, 1] [2024-11-09 07:46:08,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 07:46:08,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:46:08,526 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)] === [2024-11-09 07:46:08,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:46:08,526 INFO L85 PathProgramCache]: Analyzing trace with hash 904733870, now seen corresponding path program 3 times [2024-11-09 07:46:08,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:46:08,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29515925] [2024-11-09 07:46:08,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:46:08,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:46:08,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:09,458 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-09 07:46:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:09,474 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-09 07:46:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:09,493 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-09 07:46:09,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:09,507 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-11-09 07:46:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:09,522 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-09 07:46:09,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:10,175 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-11-09 07:46:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:46:10,323 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 176 proven. 42 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2024-11-09 07:46:10,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:46:10,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29515925] [2024-11-09 07:46:10,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29515925] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:46:10,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661572004] [2024-11-09 07:46:10,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:46:10,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:46:10,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:46:10,325 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:46:10,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 07:46:10,809 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 07:46:10,809 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:46:10,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-09 07:46:10,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:46:10,829 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 [2024-11-09 07:46:10,877 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 [2024-11-09 07:46:11,126 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 120 proven. 10 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2024-11-09 07:46:11,126 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:46:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 120 proven. 10 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2024-11-09 07:46:11,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661572004] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:46:11,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:46:11,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9, 9] total 33 [2024-11-09 07:46:11,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243043650] [2024-11-09 07:46:11,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:46:11,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-09 07:46:11,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:46:11,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-09 07:46:11,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 07:46:11,520 INFO L87 Difference]: Start difference. First operand 249 states and 284 transitions. Second operand has 33 states, 32 states have (on average 2.25) internal successors, (72), 30 states have internal predecessors, (72), 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)