./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0235-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc 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-0235-1.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 6e8dd9d71aae7a8c83467a9093ad4bffb4ddd59cddc2d90362f34ff651f24f9a --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 06:42:05,967 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 06:42:06,038 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 06:42:06,041 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 06:42:06,043 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 06:42:06,061 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 06:42:06,062 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 06:42:06,062 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 06:42:06,063 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 06:42:06,063 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 06:42:06,063 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 06:42:06,063 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 06:42:06,064 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 06:42:06,065 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 06:42:06,065 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 06:42:06,066 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 06:42:06,067 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 06:42:06,069 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 06:42:06,069 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 06:42:06,069 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 06:42:06,069 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 06:42:06,070 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 06:42:06,070 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 06:42:06,070 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 06:42:06,070 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 06:42:06,070 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 06:42:06,070 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 06:42:06,071 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 06:42:06,071 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 06:42:06,071 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 06:42:06,071 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 06:42:06,073 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 06:42:06,073 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 06:42:06,073 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 06:42:06,073 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 06:42:06,073 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 06:42:06,074 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 06:42:06,074 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 06:42:06,074 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 06:42:06,074 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 06:42:06,074 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 06:42:06,075 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 06:42:06,075 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e8dd9d71aae7a8c83467a9093ad4bffb4ddd59cddc2d90362f34ff651f24f9a [2024-11-19 06:42:06,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 06:42:06,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 06:42:06,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 06:42:06,307 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 06:42:06,308 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 06:42:06,309 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0235-1.i [2024-11-19 06:42:07,585 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 06:42:07,801 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 06:42:07,801 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0235-1.i [2024-11-19 06:42:07,820 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/171c68310/4faca5aba5b84f39b843d8165a6d12cd/FLAG320861d44 [2024-11-19 06:42:07,837 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/171c68310/4faca5aba5b84f39b843d8165a6d12cd [2024-11-19 06:42:07,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 06:42:07,842 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 06:42:07,844 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 06:42:07,844 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 06:42:07,850 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 06:42:07,850 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:42:07" (1/1) ... [2024-11-19 06:42:07,851 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1db7de5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:07, skipping insertion in model container [2024-11-19 06:42:07,851 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:42:07" (1/1) ... [2024-11-19 06:42:07,893 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 06:42:08,204 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 06:42:08,212 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 06:42:08,252 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 06:42:08,281 INFO L204 MainTranslator]: Completed translation [2024-11-19 06:42:08,282 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:08 WrapperNode [2024-11-19 06:42:08,282 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 06:42:08,283 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 06:42:08,283 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 06:42:08,283 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 06:42:08,289 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:08" (1/1) ... [2024-11-19 06:42:08,302 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:08" (1/1) ... [2024-11-19 06:42:08,332 INFO L138 Inliner]: procedures = 188, calls = 69, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 240 [2024-11-19 06:42:08,332 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 06:42:08,333 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 06:42:08,333 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 06:42:08,333 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 06:42:08,343 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:08" (1/1) ... [2024-11-19 06:42:08,343 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:08" (1/1) ... [2024-11-19 06:42:08,350 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:08" (1/1) ... [2024-11-19 06:42:08,378 INFO L175 MemorySlicer]: Split 37 memory accesses to 3 slices as follows [2, 9, 26]. 70 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]. [2024-11-19 06:42:08,378 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:08" (1/1) ... [2024-11-19 06:42:08,379 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:08" (1/1) ... [2024-11-19 06:42:08,388 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:08" (1/1) ... [2024-11-19 06:42:08,391 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:08" (1/1) ... [2024-11-19 06:42:08,393 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:08" (1/1) ... [2024-11-19 06:42:08,394 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:08" (1/1) ... [2024-11-19 06:42:08,397 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 06:42:08,398 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 06:42:08,398 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 06:42:08,398 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 06:42:08,399 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:08" (1/1) ... [2024-11-19 06:42:08,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 06:42:08,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:42:08,436 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) [2024-11-19 06:42:08,439 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 [2024-11-19 06:42:08,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 06:42:08,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 06:42:08,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-19 06:42:08,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-19 06:42:08,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-19 06:42:08,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-19 06:42:08,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-19 06:42:08,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-19 06:42:08,477 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2024-11-19 06:42:08,477 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2024-11-19 06:42:08,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-19 06:42:08,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-19 06:42:08,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-19 06:42:08,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-19 06:42:08,479 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2024-11-19 06:42:08,479 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2024-11-19 06:42:08,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 06:42:08,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 06:42:08,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-19 06:42:08,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 06:42:08,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 06:42:08,698 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 06:42:08,700 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 06:42:09,148 INFO L? ?]: Removed 203 outVars from TransFormulas that were not future-live. [2024-11-19 06:42:09,148 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 06:42:09,162 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 06:42:09,162 INFO L316 CfgBuilder]: Removed 10 assume(true) statements. [2024-11-19 06:42:09,163 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:42:09 BoogieIcfgContainer [2024-11-19 06:42:09,163 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 06:42:09,164 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 06:42:09,164 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 06:42:09,167 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 06:42:09,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:42:07" (1/3) ... [2024-11-19 06:42:09,169 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d94aa92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:42:09, skipping insertion in model container [2024-11-19 06:42:09,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:08" (2/3) ... [2024-11-19 06:42:09,169 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d94aa92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:42:09, skipping insertion in model container [2024-11-19 06:42:09,170 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:42:09" (3/3) ... [2024-11-19 06:42:09,171 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0235-1.i [2024-11-19 06:42:09,183 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 06:42:09,183 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 85 error locations. [2024-11-19 06:42:09,226 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 06:42:09,232 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;@3f819db4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 06:42:09,233 INFO L334 AbstractCegarLoop]: Starting to check reachability of 85 error locations. [2024-11-19 06:42:09,237 INFO L276 IsEmpty]: Start isEmpty. Operand has 233 states, 134 states have (on average 1.873134328358209) internal successors, (251), 219 states have internal predecessors, (251), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-19 06:42:09,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-19 06:42:09,243 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:42:09,243 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-19 06:42:09,244 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2024-11-19 06:42:09,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:42:09,251 INFO L85 PathProgramCache]: Analyzing trace with hash 7887302, now seen corresponding path program 1 times [2024-11-19 06:42:09,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:42:09,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399714647] [2024-11-19 06:42:09,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:42:09,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:42:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:42:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:42:09,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:42:09,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399714647] [2024-11-19 06:42:09,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399714647] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:42:09,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:42:09,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 06:42:09,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419060089] [2024-11-19 06:42:09,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:42:09,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-19 06:42:09,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:42:09,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-19 06:42:09,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-19 06:42:09,387 INFO L87 Difference]: Start difference. First operand has 233 states, 134 states have (on average 1.873134328358209) internal successors, (251), 219 states have internal predecessors, (251), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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) [2024-11-19 06:42:09,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:42:09,414 INFO L93 Difference]: Finished difference Result 233 states and 262 transitions. [2024-11-19 06:42:09,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-19 06:42:09,416 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 [2024-11-19 06:42:09,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:42:09,422 INFO L225 Difference]: With dead ends: 233 [2024-11-19 06:42:09,422 INFO L226 Difference]: Without dead ends: 231 [2024-11-19 06:42:09,424 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 [2024-11-19 06:42:09,426 INFO L432 NwaCegarLoop]: 262 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, 262 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 [2024-11-19 06:42:09,426 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 06:42:09,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-19 06:42:09,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2024-11-19 06:42:09,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 133 states have (on average 1.7894736842105263) internal successors, (238), 217 states have internal predecessors, (238), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-19 06:42:09,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 260 transitions. [2024-11-19 06:42:09,462 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 260 transitions. Word has length 4 [2024-11-19 06:42:09,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:42:09,463 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 260 transitions. [2024-11-19 06:42:09,463 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) [2024-11-19 06:42:09,463 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 260 transitions. [2024-11-19 06:42:09,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-19 06:42:09,463 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:42:09,464 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-19 06:42:09,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 06:42:09,464 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2024-11-19 06:42:09,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:42:09,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1014370765, now seen corresponding path program 1 times [2024-11-19 06:42:09,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:42:09,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171375605] [2024-11-19 06:42:09,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:42:09,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:42:09,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:42:09,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:42:09,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:42:09,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171375605] [2024-11-19 06:42:09,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171375605] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:42:09,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:42:09,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 06:42:09,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960925248] [2024-11-19 06:42:09,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:42:09,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 06:42:09,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:42:09,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 06:42:09,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:42:09,579 INFO L87 Difference]: Start difference. First operand 231 states and 260 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) [2024-11-19 06:42:09,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:42:09,743 INFO L93 Difference]: Finished difference Result 230 states and 259 transitions. [2024-11-19 06:42:09,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 06:42:09,744 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 [2024-11-19 06:42:09,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:42:09,746 INFO L225 Difference]: With dead ends: 230 [2024-11-19 06:42:09,747 INFO L226 Difference]: Without dead ends: 230 [2024-11-19 06:42:09,747 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 [2024-11-19 06:42:09,748 INFO L432 NwaCegarLoop]: 254 mSDtfsCounter, 4 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:42:09,748 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 427 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:42:09,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-11-19 06:42:09,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2024-11-19 06:42:09,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 133 states have (on average 1.781954887218045) internal successors, (237), 216 states have internal predecessors, (237), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-19 06:42:09,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 259 transitions. [2024-11-19 06:42:09,760 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 259 transitions. Word has length 6 [2024-11-19 06:42:09,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:42:09,761 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 259 transitions. [2024-11-19 06:42:09,761 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) [2024-11-19 06:42:09,761 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 259 transitions. [2024-11-19 06:42:09,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-19 06:42:09,761 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:42:09,761 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:42:09,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 06:42:09,762 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2024-11-19 06:42:09,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:42:09,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1380722403, now seen corresponding path program 1 times [2024-11-19 06:42:09,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:42:09,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774199474] [2024-11-19 06:42:09,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:42:09,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:42:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 06:42:09,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234595063] [2024-11-19 06:42:09,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:42:09,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:42:09,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:42:09,802 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) [2024-11-19 06:42:09,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 06:42:09,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:42:09,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-19 06:42:09,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:42:10,006 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 [2024-11-19 06:42:10,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:42:10,030 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 06:42:10,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:42:10,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774199474] [2024-11-19 06:42:10,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 06:42:10,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234595063] [2024-11-19 06:42:10,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234595063] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:42:10,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:42:10,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 06:42:10,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189866175] [2024-11-19 06:42:10,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:42:10,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 06:42:10,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:42:10,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 06:42:10,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 06:42:10,036 INFO L87 Difference]: Start difference. First operand 230 states and 259 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) [2024-11-19 06:42:10,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:42:10,182 INFO L93 Difference]: Finished difference Result 239 states and 268 transitions. [2024-11-19 06:42:10,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 06:42:10,182 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 [2024-11-19 06:42:10,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:42:10,184 INFO L225 Difference]: With dead ends: 239 [2024-11-19 06:42:10,184 INFO L226 Difference]: Without dead ends: 239 [2024-11-19 06:42:10,184 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 [2024-11-19 06:42:10,185 INFO L432 NwaCegarLoop]: 249 mSDtfsCounter, 11 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:42:10,187 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 678 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:42:10,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-11-19 06:42:10,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2024-11-19 06:42:10,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 141 states have (on average 1.7446808510638299) internal successors, (246), 224 states have internal predecessors, (246), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-19 06:42:10,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 268 transitions. [2024-11-19 06:42:10,206 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 268 transitions. Word has length 7 [2024-11-19 06:42:10,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:42:10,207 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 268 transitions. [2024-11-19 06:42:10,207 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) [2024-11-19 06:42:10,207 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 268 transitions. [2024-11-19 06:42:10,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-19 06:42:10,213 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:42:10,213 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] [2024-11-19 06:42:10,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-19 06:42:10,413 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 [2024-11-19 06:42:10,414 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2024-11-19 06:42:10,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:42:10,414 INFO L85 PathProgramCache]: Analyzing trace with hash -282348366, now seen corresponding path program 1 times [2024-11-19 06:42:10,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:42:10,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939375129] [2024-11-19 06:42:10,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:42:10,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:42:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 06:42:10,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986653235] [2024-11-19 06:42:10,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:42:10,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:42:10,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:42:10,510 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) [2024-11-19 06:42:10,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 06:42:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:42:10,681 INFO L255 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-19 06:42:10,686 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:42:10,717 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 [2024-11-19 06:42:10,762 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 [2024-11-19 06:42:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-19 06:42:10,827 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 06:42:10,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:42:10,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939375129] [2024-11-19 06:42:10,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 06:42:10,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986653235] [2024-11-19 06:42:10,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986653235] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:42:10,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:42:10,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 06:42:10,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637980481] [2024-11-19 06:42:10,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:42:10,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 06:42:10,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:42:10,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 06:42:10,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 06:42:10,831 INFO L87 Difference]: Start difference. First operand 239 states and 268 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) [2024-11-19 06:42:10,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:42:10,976 INFO L93 Difference]: Finished difference Result 251 states and 280 transitions. [2024-11-19 06:42:10,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 06:42:10,977 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 [2024-11-19 06:42:10,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:42:10,978 INFO L225 Difference]: With dead ends: 251 [2024-11-19 06:42:10,978 INFO L226 Difference]: Without dead ends: 241 [2024-11-19 06:42:10,978 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 06:42:10,979 INFO L432 NwaCegarLoop]: 254 mSDtfsCounter, 3 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:42:10,979 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 928 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:42:10,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2024-11-19 06:42:10,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2024-11-19 06:42:10,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 143 states have (on average 1.7342657342657342) internal successors, (248), 226 states have internal predecessors, (248), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-19 06:42:10,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 270 transitions. [2024-11-19 06:42:10,996 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 270 transitions. Word has length 66 [2024-11-19 06:42:10,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:42:10,998 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 270 transitions. [2024-11-19 06:42:10,999 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) [2024-11-19 06:42:10,999 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 270 transitions. [2024-11-19 06:42:11,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-19 06:42:11,000 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:42:11,000 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] [2024-11-19 06:42:11,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 06:42:11,200 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 [2024-11-19 06:42:11,201 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2024-11-19 06:42:11,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:42:11,201 INFO L85 PathProgramCache]: Analyzing trace with hash -403824716, now seen corresponding path program 1 times [2024-11-19 06:42:11,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:42:11,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992432313] [2024-11-19 06:42:11,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:42:11,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:42:11,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 06:42:11,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2064392309] [2024-11-19 06:42:11,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:42:11,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:42:11,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:42:11,396 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) [2024-11-19 06:42:11,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 06:42:11,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:42:11,609 INFO L255 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-19 06:42:11,615 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:42:11,644 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 [2024-11-19 06:42:11,674 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 [2024-11-19 06:42:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 88 proven. 3 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-19 06:42:11,750 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:42:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-19 06:42:11,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:42:11,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992432313] [2024-11-19 06:42:11,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 06:42:11,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064392309] [2024-11-19 06:42:11,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064392309] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:42:11,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 06:42:11,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2024-11-19 06:42:11,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401346825] [2024-11-19 06:42:11,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 06:42:11,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 06:42:11,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:42:11,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 06:42:11,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-19 06:42:11,954 INFO L87 Difference]: Start difference. First operand 241 states and 270 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-19 06:42:12,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:42:12,274 INFO L93 Difference]: Finished difference Result 260 states and 290 transitions. [2024-11-19 06:42:12,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 06:42:12,275 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 71 [2024-11-19 06:42:12,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:42:12,276 INFO L225 Difference]: With dead ends: 260 [2024-11-19 06:42:12,276 INFO L226 Difference]: Without dead ends: 245 [2024-11-19 06:42:12,276 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2024-11-19 06:42:12,277 INFO L432 NwaCegarLoop]: 253 mSDtfsCounter, 17 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1430 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 06:42:12,277 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 1430 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 06:42:12,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-11-19 06:42:12,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2024-11-19 06:42:12,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 147 states have (on average 1.7142857142857142) internal successors, (252), 230 states have internal predecessors, (252), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-19 06:42:12,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 274 transitions. [2024-11-19 06:42:12,283 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 274 transitions. Word has length 71 [2024-11-19 06:42:12,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:42:12,283 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 274 transitions. [2024-11-19 06:42:12,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-19 06:42:12,283 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 274 transitions. [2024-11-19 06:42:12,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-19 06:42:12,285 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:42:12,285 INFO L215 NwaCegarLoop]: trace histogram [20, 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] [2024-11-19 06:42:12,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 06:42:12,485 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 [2024-11-19 06:42:12,486 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2024-11-19 06:42:12,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:42:12,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1345968334, now seen corresponding path program 2 times [2024-11-19 06:42:12,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:42:12,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461502747] [2024-11-19 06:42:12,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 06:42:12,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:42:12,668 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 06:42:12,668 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-19 06:42:12,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989881714] [2024-11-19 06:42:12,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 06:42:12,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:42:12,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:42:12,683 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) [2024-11-19 06:42:12,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 06:42:13,133 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 06:42:13,133 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:42:13,138 INFO L255 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-19 06:42:13,143 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:42:13,194 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 [2024-11-19 06:42:13,222 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 [2024-11-19 06:42:13,363 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 246 proven. 74 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-19 06:42:13,363 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:42:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 79 proven. 74 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2024-11-19 06:42:13,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:42:13,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461502747] [2024-11-19 06:42:13,676 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 06:42:13,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989881714] [2024-11-19 06:42:13,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989881714] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:42:13,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 06:42:13,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2024-11-19 06:42:13,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823146959] [2024-11-19 06:42:13,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 06:42:13,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 06:42:13,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:42:13,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 06:42:13,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2024-11-19 06:42:13,682 INFO L87 Difference]: Start difference. First operand 245 states and 274 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-19 06:42:21,913 WARN L286 SmtUtils]: Spent 8.09s on a formula simplification. DAG size of input: 44 DAG size of output: 36 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-19 06:42:30,003 WARN L286 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 37 DAG size of output: 35 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-19 06:42:34,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:42:34,674 INFO L93 Difference]: Finished difference Result 269 states and 304 transitions. [2024-11-19 06:42:34,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-19 06:42:34,674 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 86 [2024-11-19 06:42:34,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:42:34,675 INFO L225 Difference]: With dead ends: 269 [2024-11-19 06:42:34,675 INFO L226 Difference]: Without dead ends: 254 [2024-11-19 06:42:34,676 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=307, Invalid=952, Unknown=1, NotChecked=0, Total=1260 [2024-11-19 06:42:34,676 INFO L432 NwaCegarLoop]: 253 mSDtfsCounter, 33 mSDsluCounter, 3152 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 3405 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 06:42:34,677 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 3405 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 06:42:34,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-11-19 06:42:34,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2024-11-19 06:42:34,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 156 states have (on average 1.6923076923076923) internal successors, (264), 239 states have internal predecessors, (264), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-19 06:42:34,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 286 transitions. [2024-11-19 06:42:34,686 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 286 transitions. Word has length 86 [2024-11-19 06:42:34,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:42:34,688 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 286 transitions. [2024-11-19 06:42:34,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-19 06:42:34,688 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 286 transitions. [2024-11-19 06:42:34,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-19 06:42:34,690 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:42:34,690 INFO L215 NwaCegarLoop]: trace histogram [40, 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] [2024-11-19 06:42:34,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 06:42:34,891 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 [2024-11-19 06:42:34,891 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2024-11-19 06:42:34,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:42:34,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1501472334, now seen corresponding path program 3 times [2024-11-19 06:42:34,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:42:34,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364142003] [2024-11-19 06:42:34,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 06:42:34,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:42:35,395 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2024-11-19 06:42:35,396 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-19 06:42:35,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420745537] [2024-11-19 06:42:35,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 06:42:35,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:42:35,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:42:35,406 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) [2024-11-19 06:42:35,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 06:42:35,614 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 06:42:35,614 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:42:35,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-19 06:42:35,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:42:35,641 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 [2024-11-19 06:42:35,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1070 trivial. 0 not checked. [2024-11-19 06:42:35,656 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 06:42:35,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:42:35,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364142003] [2024-11-19 06:42:35,656 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 06:42:35,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420745537] [2024-11-19 06:42:35,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420745537] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:42:35,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:42:35,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 06:42:35,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891144436] [2024-11-19 06:42:35,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:42:35,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 06:42:35,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:42:35,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 06:42:35,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 06:42:35,659 INFO L87 Difference]: Start difference. First operand 254 states and 286 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) [2024-11-19 06:42:35,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:42:35,777 INFO L93 Difference]: Finished difference Result 253 states and 285 transitions. [2024-11-19 06:42:35,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 06:42:35,777 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 106 [2024-11-19 06:42:35,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:42:35,781 INFO L225 Difference]: With dead ends: 253 [2024-11-19 06:42:35,781 INFO L226 Difference]: Without dead ends: 253 [2024-11-19 06:42:35,782 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-19 06:42:35,782 INFO L432 NwaCegarLoop]: 261 mSDtfsCounter, 11 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:42:35,782 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 700 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:42:35,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2024-11-19 06:42:35,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2024-11-19 06:42:35,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 156 states have (on average 1.685897435897436) internal successors, (263), 238 states have internal predecessors, (263), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-19 06:42:35,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 285 transitions. [2024-11-19 06:42:35,788 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 285 transitions. Word has length 106 [2024-11-19 06:42:35,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:42:35,788 INFO L471 AbstractCegarLoop]: Abstraction has 253 states and 285 transitions. [2024-11-19 06:42:35,788 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) [2024-11-19 06:42:35,789 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 285 transitions. [2024-11-19 06:42:35,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-19 06:42:35,790 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:42:35,790 INFO L215 NwaCegarLoop]: trace histogram [42, 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] [2024-11-19 06:42:35,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 06:42:35,993 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 [2024-11-19 06:42:35,996 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2024-11-19 06:42:35,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:42:35,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1552200972, now seen corresponding path program 1 times [2024-11-19 06:42:35,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:42:35,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214935977] [2024-11-19 06:42:35,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:42:35,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:42:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:42:37,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 523 proven. 4 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2024-11-19 06:42:37,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:42:37,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214935977] [2024-11-19 06:42:37,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214935977] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:42:37,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176245027] [2024-11-19 06:42:37,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:42:37,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:42:37,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:42:37,020 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) [2024-11-19 06:42:37,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 06:42:37,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:42:37,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 1159 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-19 06:42:37,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:42:37,437 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 [2024-11-19 06:42:37,487 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-19 06:42:37,487 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 [2024-11-19 06:42:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 493 proven. 1 refuted. 0 times theorem prover too weak. 721 trivial. 33 not checked. [2024-11-19 06:42:37,504 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:42:37,744 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 06:42:37,744 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 [2024-11-19 06:42:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 493 proven. 34 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2024-11-19 06:42:37,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176245027] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:42:37,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:42:37,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 15 [2024-11-19 06:42:37,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908888421] [2024-11-19 06:42:37,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:42:37,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-19 06:42:37,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:42:37,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-19 06:42:37,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=172, Unknown=1, NotChecked=26, Total=240 [2024-11-19 06:42:37,781 INFO L87 Difference]: Start difference. First operand 253 states and 285 transitions. Second operand has 16 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-19 06:42:38,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:42:38,438 INFO L93 Difference]: Finished difference Result 352 states and 403 transitions. [2024-11-19 06:42:38,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 06:42:38,439 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 115 [2024-11-19 06:42:38,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:42:38,441 INFO L225 Difference]: With dead ends: 352 [2024-11-19 06:42:38,441 INFO L226 Difference]: Without dead ends: 352 [2024-11-19 06:42:38,442 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 222 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=277, Unknown=1, NotChecked=34, Total=380 [2024-11-19 06:42:38,442 INFO L432 NwaCegarLoop]: 207 mSDtfsCounter, 127 mSDsluCounter, 1575 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 1782 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 368 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-19 06:42:38,442 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 1782 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 974 Invalid, 0 Unknown, 368 Unchecked, 0.5s Time] [2024-11-19 06:42:38,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2024-11-19 06:42:38,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 251. [2024-11-19 06:42:38,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 156 states have (on average 1.6730769230769231) internal successors, (261), 236 states have internal predecessors, (261), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-19 06:42:38,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 283 transitions. [2024-11-19 06:42:38,452 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 283 transitions. Word has length 115 [2024-11-19 06:42:38,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:42:38,452 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 283 transitions. [2024-11-19 06:42:38,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-19 06:42:38,453 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 283 transitions. [2024-11-19 06:42:38,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-19 06:42:38,457 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:42:38,457 INFO L215 NwaCegarLoop]: trace histogram [42, 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] [2024-11-19 06:42:38,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-19 06:42:38,658 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 [2024-11-19 06:42:38,658 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 82 more)] === [2024-11-19 06:42:38,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:42:38,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1552200973, now seen corresponding path program 1 times [2024-11-19 06:42:38,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:42:38,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288814004] [2024-11-19 06:42:38,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:42:38,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:42:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:42:40,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 493 proven. 70 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2024-11-19 06:42:40,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:42:40,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288814004] [2024-11-19 06:42:40,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288814004] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:42:40,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161495950] [2024-11-19 06:42:40,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:42:40,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:42:40,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:42:40,843 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) [2024-11-19 06:42:40,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 06:42:41,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:42:41,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 1159 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-11-19 06:42:41,939 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:42:42,165 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 [2024-11-19 06:43:19,599 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 [2024-11-19 06:43:19,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 06:43:19,652 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 [2024-11-19 06:43:19,660 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 06:43:19,660 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 [2024-11-19 06:43:19,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 398 proven. 499 refuted. 0 times theorem prover too weak. 272 trivial. 79 not checked. [2024-11-19 06:43:19,666 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:43:19,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161495950] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:43:19,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 06:43:19,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 29] total 41 [2024-11-19 06:43:19,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172112104] [2024-11-19 06:43:19,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 06:43:19,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-19 06:43:19,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:43:19,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-19 06:43:19,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1674, Unknown=10, NotChecked=82, Total=1892 [2024-11-19 06:43:19,878 INFO L87 Difference]: Start difference. First operand 251 states and 283 transitions. Second operand has 42 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-19 06:43:23,939 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] [2024-11-19 06:43:37,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-19 06:43:42,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0]