./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-broom/sll-shared-sll-before.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.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-broom/sll-shared-sll-before.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-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 64bit --witnessprinter.graph.data.programhash 3d5c47b12a731095d5a51b5ad7e19fee7b2131bbe4b3910b3108642fe52c085d --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 23:02:39,483 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 23:02:39,532 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2025-03-08 23:02:39,535 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 23:02:39,535 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 23:02:39,551 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 23:02:39,551 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 23:02:39,551 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 23:02:39,552 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 23:02:39,552 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 23:02:39,553 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 23:02:39,553 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 23:02:39,553 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 23:02:39,553 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 23:02:39,553 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 23:02:39,554 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 23:02:39,554 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 23:02:39,554 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 23:02:39,554 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-08 23:02:39,554 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-08 23:02:39,554 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-08 23:02:39,554 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 23:02:39,554 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-08 23:02:39,554 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-08 23:02:39,554 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 23:02:39,554 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 23:02:39,554 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 23:02:39,555 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 23:02:39,555 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 23:02:39,555 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 23:02:39,555 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 23:02:39,555 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 23:02:39,555 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 23:02:39,555 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 23:02:39,555 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 23:02:39,555 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 23:02:39,556 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 23:02:39,556 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 23:02:39,556 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 23:02:39,556 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d5c47b12a731095d5a51b5ad7e19fee7b2131bbe4b3910b3108642fe52c085d [2025-03-08 23:02:39,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 23:02:39,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 23:02:39,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 23:02:39,775 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 23:02:39,776 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 23:02:39,777 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-broom/sll-shared-sll-before.i [2025-03-08 23:02:40,916 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e88cf3188/e1d78d87ae854ccdaa81c12a0e65ad27/FLAG4b129bb04 [2025-03-08 23:02:41,196 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 23:02:41,197 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-broom/sll-shared-sll-before.i [2025-03-08 23:02:41,214 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e88cf3188/e1d78d87ae854ccdaa81c12a0e65ad27/FLAG4b129bb04 [2025-03-08 23:02:41,483 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e88cf3188/e1d78d87ae854ccdaa81c12a0e65ad27 [2025-03-08 23:02:41,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 23:02:41,485 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 23:02:41,486 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 23:02:41,486 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 23:02:41,489 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 23:02:41,490 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 11:02:41" (1/1) ... [2025-03-08 23:02:41,490 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@304366dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:02:41, skipping insertion in model container [2025-03-08 23:02:41,490 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 11:02:41" (1/1) ... [2025-03-08 23:02:41,523 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 23:02:41,741 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 23:02:41,749 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 23:02:41,788 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 23:02:41,808 INFO L204 MainTranslator]: Completed translation [2025-03-08 23:02:41,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:02:41 WrapperNode [2025-03-08 23:02:41,809 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 23:02:41,810 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 23:02:41,810 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 23:02:41,810 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 23:02:41,815 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:02:41" (1/1) ... [2025-03-08 23:02:41,825 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:02:41" (1/1) ... [2025-03-08 23:02:41,842 INFO L138 Inliner]: procedures = 120, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 79 [2025-03-08 23:02:41,843 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 23:02:41,844 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 23:02:41,844 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 23:02:41,844 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 23:02:41,851 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:02:41" (1/1) ... [2025-03-08 23:02:41,851 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:02:41" (1/1) ... [2025-03-08 23:02:41,854 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:02:41" (1/1) ... [2025-03-08 23:02:41,871 INFO L175 MemorySlicer]: Split 12 memory accesses to 1 slices as follows [12]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 7 writes are split as follows [7]. [2025-03-08 23:02:41,872 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:02:41" (1/1) ... [2025-03-08 23:02:41,873 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:02:41" (1/1) ... [2025-03-08 23:02:41,883 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:02:41" (1/1) ... [2025-03-08 23:02:41,883 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:02:41" (1/1) ... [2025-03-08 23:02:41,884 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:02:41" (1/1) ... [2025-03-08 23:02:41,884 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:02:41" (1/1) ... [2025-03-08 23:02:41,885 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 23:02:41,886 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 23:02:41,886 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 23:02:41,886 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 23:02:41,889 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:02:41" (1/1) ... [2025-03-08 23:02:41,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 23:02:41,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:02:41,911 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) [2025-03-08 23:02:41,915 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 [2025-03-08 23:02:41,929 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero_internal [2025-03-08 23:02:41,929 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero_internal [2025-03-08 23:02:41,930 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2025-03-08 23:02:41,930 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2025-03-08 23:02:41,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-08 23:02:41,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-03-08 23:02:41,930 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-03-08 23:02:41,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-08 23:02:41,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 23:02:41,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 23:02:42,003 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 23:02:42,005 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 23:02:42,203 INFO L? ?]: Removed 84 outVars from TransFormulas that were not future-live. [2025-03-08 23:02:42,206 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 23:02:42,215 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 23:02:42,215 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 23:02:42,215 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 11:02:42 BoogieIcfgContainer [2025-03-08 23:02:42,215 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 23:02:42,217 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 23:02:42,217 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 23:02:42,220 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 23:02:42,220 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 11:02:41" (1/3) ... [2025-03-08 23:02:42,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e01b2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 11:02:42, skipping insertion in model container [2025-03-08 23:02:42,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 11:02:41" (2/3) ... [2025-03-08 23:02:42,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e01b2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 11:02:42, skipping insertion in model container [2025-03-08 23:02:42,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 11:02:42" (3/3) ... [2025-03-08 23:02:42,222 INFO L128 eAbstractionObserver]: Analyzing ICFG sll-shared-sll-before.i [2025-03-08 23:02:42,232 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 23:02:42,233 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sll-shared-sll-before.i that has 3 procedures, 87 locations, 1 initial locations, 4 loop locations, and 31 error locations. [2025-03-08 23:02:42,257 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 23:02:42,267 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;@690c7ea5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 23:02:42,267 INFO L334 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2025-03-08 23:02:42,270 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 80 states have internal predecessors, (86), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-08 23:02:42,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2025-03-08 23:02:42,274 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:02:42,275 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2025-03-08 23:02:42,276 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zero_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:02:42,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:02:42,280 INFO L85 PathProgramCache]: Analyzing trace with hash 109728929, now seen corresponding path program 1 times [2025-03-08 23:02:42,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:02:42,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83259374] [2025-03-08 23:02:42,287 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:42,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:02:42,336 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-08 23:02:42,346 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-08 23:02:42,346 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:42,346 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:02:42,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:02:42,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83259374] [2025-03-08 23:02:42,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83259374] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:02:42,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:02:42,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 23:02:42,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214328353] [2025-03-08 23:02:42,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:02:42,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 23:02:42,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:02:42,442 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 23:02:42,443 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 23:02:42,444 INFO L87 Difference]: Start difference. First operand has 87 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 80 states have internal predecessors, (86), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 23:02:42,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:02:42,518 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2025-03-08 23:02:42,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 23:02:42,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2025-03-08 23:02:42,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:02:42,524 INFO L225 Difference]: With dead ends: 86 [2025-03-08 23:02:42,524 INFO L226 Difference]: Without dead ends: 84 [2025-03-08 23:02:42,526 INFO L434 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 [2025-03-08 23:02:42,528 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 1 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 23:02:42,528 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 144 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 23:02:42,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-03-08 23:02:42,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2025-03-08 23:02:42,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 48 states have (on average 1.6875) internal successors, (81), 77 states have internal predecessors, (81), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-08 23:02:42,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2025-03-08 23:02:42,562 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 5 [2025-03-08 23:02:42,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:02:42,563 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2025-03-08 23:02:42,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 23:02:42,564 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2025-03-08 23:02:42,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2025-03-08 23:02:42,564 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:02:42,564 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2025-03-08 23:02:42,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 23:02:42,565 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zero_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:02:42,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:02:42,567 INFO L85 PathProgramCache]: Analyzing trace with hash 109728930, now seen corresponding path program 1 times [2025-03-08 23:02:42,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:02:42,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761099595] [2025-03-08 23:02:42,567 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:42,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:02:42,575 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-08 23:02:42,582 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-08 23:02:42,583 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:42,583 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:02:42,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:02:42,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761099595] [2025-03-08 23:02:42,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761099595] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:02:42,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:02:42,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 23:02:42,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762833745] [2025-03-08 23:02:42,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:02:42,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 23:02:42,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:02:42,663 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 23:02:42,664 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 23:02:42,664 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 23:02:42,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:02:42,712 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2025-03-08 23:02:42,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 23:02:42,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2025-03-08 23:02:42,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:02:42,713 INFO L225 Difference]: With dead ends: 83 [2025-03-08 23:02:42,713 INFO L226 Difference]: Without dead ends: 83 [2025-03-08 23:02:42,714 INFO L434 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 [2025-03-08 23:02:42,714 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 1 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 23:02:42,714 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 148 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 23:02:42,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-03-08 23:02:42,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2025-03-08 23:02:42,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 76 states have internal predecessors, (80), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-08 23:02:42,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2025-03-08 23:02:42,724 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 5 [2025-03-08 23:02:42,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:02:42,724 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2025-03-08 23:02:42,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 23:02:42,725 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2025-03-08 23:02:42,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-08 23:02:42,725 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:02:42,725 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:02:42,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 23:02:42,726 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:02:42,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:02:42,727 INFO L85 PathProgramCache]: Analyzing trace with hash 538487693, now seen corresponding path program 1 times [2025-03-08 23:02:42,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:02:42,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584903685] [2025-03-08 23:02:42,727 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:42,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:02:42,737 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-08 23:02:42,742 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 23:02:42,743 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:42,743 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:42,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:02:42,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:02:42,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584903685] [2025-03-08 23:02:42,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584903685] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:02:42,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:02:42,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 23:02:42,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428556556] [2025-03-08 23:02:42,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:02:42,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 23:02:42,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:02:42,810 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 23:02:42,810 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 23:02:42,810 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 23:02:42,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:02:42,856 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2025-03-08 23:02:42,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 23:02:42,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2025-03-08 23:02:42,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:02:42,857 INFO L225 Difference]: With dead ends: 81 [2025-03-08 23:02:42,857 INFO L226 Difference]: Without dead ends: 81 [2025-03-08 23:02:42,858 INFO L434 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 [2025-03-08 23:02:42,858 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 2 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 23:02:42,858 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 134 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 23:02:42,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-03-08 23:02:42,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2025-03-08 23:02:42,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 48 states have (on average 1.625) internal successors, (78), 74 states have internal predecessors, (78), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-08 23:02:42,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2025-03-08 23:02:42,864 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 16 [2025-03-08 23:02:42,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:02:42,865 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2025-03-08 23:02:42,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 23:02:42,865 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2025-03-08 23:02:42,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-08 23:02:42,865 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:02:42,865 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:02:42,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 23:02:42,866 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting alloc_and_zeroErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:02:42,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:02:42,866 INFO L85 PathProgramCache]: Analyzing trace with hash 538487694, now seen corresponding path program 1 times [2025-03-08 23:02:42,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:02:42,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888399238] [2025-03-08 23:02:42,867 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:42,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:02:42,874 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-08 23:02:42,886 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 23:02:42,886 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:42,886 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:02:42,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:02:42,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888399238] [2025-03-08 23:02:42,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888399238] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:02:42,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:02:42,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 23:02:42,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452428443] [2025-03-08 23:02:42,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:02:42,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 23:02:42,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:02:42,962 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 23:02:42,962 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 23:02:42,962 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 23:02:43,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:02:43,003 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2025-03-08 23:02:43,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 23:02:43,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2025-03-08 23:02:43,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:02:43,006 INFO L225 Difference]: With dead ends: 79 [2025-03-08 23:02:43,006 INFO L226 Difference]: Without dead ends: 79 [2025-03-08 23:02:43,006 INFO L434 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 [2025-03-08 23:02:43,006 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 2 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 23:02:43,006 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 141 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 23:02:43,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-03-08 23:02:43,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2025-03-08 23:02:43,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 72 states have internal predecessors, (76), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-08 23:02:43,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2025-03-08 23:02:43,015 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 16 [2025-03-08 23:02:43,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:02:43,016 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2025-03-08 23:02:43,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 23:02:43,016 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2025-03-08 23:02:43,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-08 23:02:43,018 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:02:43,018 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:02:43,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 23:02:43,018 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:02:43,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:02:43,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1027324219, now seen corresponding path program 1 times [2025-03-08 23:02:43,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:02:43,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27765547] [2025-03-08 23:02:43,019 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:43,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:02:43,028 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 23:02:43,043 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 23:02:43,043 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:43,043 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:02:43,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:02:43,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27765547] [2025-03-08 23:02:43,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27765547] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:02:43,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830486537] [2025-03-08 23:02:43,275 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:43,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:02:43,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:02:43,278 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) [2025-03-08 23:02:43,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 23:02:43,323 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 23:02:43,338 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 23:02:43,338 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:43,338 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:43,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-08 23:02:43,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:02:43,378 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 [2025-03-08 23:02:43,412 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2025-03-08 23:02:43,451 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-03-08 23:02:43,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-03-08 23:02:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2025-03-08 23:02:43,456 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:02:43,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830486537] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:02:43,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 23:02:43,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2025-03-08 23:02:43,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564913223] [2025-03-08 23:02:43,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 23:02:43,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 23:02:43,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:02:43,510 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 23:02:43,510 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=86, Unknown=1, NotChecked=18, Total=132 [2025-03-08 23:02:43,510 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 23:02:43,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:02:43,753 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2025-03-08 23:02:43,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 23:02:43,754 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 18 [2025-03-08 23:02:43,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:02:43,754 INFO L225 Difference]: With dead ends: 84 [2025-03-08 23:02:43,754 INFO L226 Difference]: Without dead ends: 84 [2025-03-08 23:02:43,755 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=122, Unknown=1, NotChecked=22, Total=182 [2025-03-08 23:02:43,755 INFO L435 NwaCegarLoop]: 71 mSDtfsCounter, 8 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 23:02:43,755 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 411 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 303 Invalid, 0 Unknown, 88 Unchecked, 0.2s Time] [2025-03-08 23:02:43,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-03-08 23:02:43,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2025-03-08 23:02:43,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 74 states have internal predecessors, (80), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 23:02:43,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2025-03-08 23:02:43,759 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 18 [2025-03-08 23:02:43,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:02:43,759 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2025-03-08 23:02:43,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 23:02:43,759 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2025-03-08 23:02:43,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-08 23:02:43,760 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:02:43,760 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:02:43,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 23:02:43,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:02:43,964 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:02:43,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:02:43,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1027324220, now seen corresponding path program 1 times [2025-03-08 23:02:43,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:02:43,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593731325] [2025-03-08 23:02:43,965 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:43,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:02:43,971 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 23:02:43,977 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 23:02:43,978 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:43,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:44,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:02:44,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:02:44,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593731325] [2025-03-08 23:02:44,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593731325] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:02:44,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780732696] [2025-03-08 23:02:44,228 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:44,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:02:44,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:02:44,230 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) [2025-03-08 23:02:44,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 23:02:44,267 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 23:02:44,278 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 23:02:44,278 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:44,278 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:44,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-08 23:02:44,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:02:44,290 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 [2025-03-08 23:02:44,294 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 [2025-03-08 23:02:44,380 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2025-03-08 23:02:44,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:02:44,414 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 [2025-03-08 23:02:44,423 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-08 23:02:44,423 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 [2025-03-08 23:02:44,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2025-03-08 23:02:44,426 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:02:44,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780732696] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:02:44,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 23:02:44,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2025-03-08 23:02:44,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094901038] [2025-03-08 23:02:44,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 23:02:44,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 23:02:44,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:02:44,524 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 23:02:44,524 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=127, Unknown=1, NotChecked=22, Total=182 [2025-03-08 23:02:44,524 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 23:02:44,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:02:44,769 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2025-03-08 23:02:44,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 23:02:44,770 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 18 [2025-03-08 23:02:44,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:02:44,771 INFO L225 Difference]: With dead ends: 86 [2025-03-08 23:02:44,771 INFO L226 Difference]: Without dead ends: 86 [2025-03-08 23:02:44,771 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=171, Unknown=1, NotChecked=26, Total=240 [2025-03-08 23:02:44,771 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 7 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 23:02:44,772 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 423 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 309 Invalid, 0 Unknown, 89 Unchecked, 0.2s Time] [2025-03-08 23:02:44,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2025-03-08 23:02:44,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2025-03-08 23:02:44,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 53 states have (on average 1.528301886792453) internal successors, (81), 76 states have internal predecessors, (81), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 23:02:44,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2025-03-08 23:02:44,779 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 18 [2025-03-08 23:02:44,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:02:44,779 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2025-03-08 23:02:44,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 23:02:44,779 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2025-03-08 23:02:44,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-03-08 23:02:44,780 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:02:44,780 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:02:44,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 23:02:44,984 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,SelfDestructingSolverStorable5 [2025-03-08 23:02:44,984 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:02:44,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:02:44,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1733213825, now seen corresponding path program 1 times [2025-03-08 23:02:44,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:02:44,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90452667] [2025-03-08 23:02:44,985 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:44,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:02:44,991 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-08 23:02:44,995 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-08 23:02:44,995 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:44,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:45,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:02:45,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:02:45,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90452667] [2025-03-08 23:02:45,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90452667] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:02:45,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:02:45,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 23:02:45,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610274409] [2025-03-08 23:02:45,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:02:45,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 23:02:45,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:02:45,042 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 23:02:45,042 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-08 23:02:45,042 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 23:02:45,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:02:45,122 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2025-03-08 23:02:45,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 23:02:45,122 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2025-03-08 23:02:45,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:02:45,124 INFO L225 Difference]: With dead ends: 86 [2025-03-08 23:02:45,124 INFO L226 Difference]: Without dead ends: 86 [2025-03-08 23:02:45,124 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-08 23:02:45,125 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 11 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 23:02:45,125 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 242 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 23:02:45,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2025-03-08 23:02:45,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2025-03-08 23:02:45,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 53 states have (on average 1.471698113207547) internal successors, (78), 73 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 23:02:45,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2025-03-08 23:02:45,132 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 22 [2025-03-08 23:02:45,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:02:45,132 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2025-03-08 23:02:45,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 23:02:45,132 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2025-03-08 23:02:45,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-03-08 23:02:45,132 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:02:45,133 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:02:45,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-08 23:02:45,133 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:02:45,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:02:45,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1733213826, now seen corresponding path program 1 times [2025-03-08 23:02:45,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:02:45,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298505398] [2025-03-08 23:02:45,133 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:45,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:02:45,144 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-08 23:02:45,150 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-08 23:02:45,151 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:45,151 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:45,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:02:45,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:02:45,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298505398] [2025-03-08 23:02:45,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298505398] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:02:45,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:02:45,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 23:02:45,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409734785] [2025-03-08 23:02:45,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:02:45,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 23:02:45,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:02:45,272 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 23:02:45,272 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-08 23:02:45,272 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 23:02:45,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:02:45,344 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2025-03-08 23:02:45,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 23:02:45,345 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2025-03-08 23:02:45,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:02:45,345 INFO L225 Difference]: With dead ends: 85 [2025-03-08 23:02:45,345 INFO L226 Difference]: Without dead ends: 85 [2025-03-08 23:02:45,345 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-08 23:02:45,346 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 5 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 23:02:45,347 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 275 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 23:02:45,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2025-03-08 23:02:45,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2025-03-08 23:02:45,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 72 states have internal predecessors, (77), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 23:02:45,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2025-03-08 23:02:45,354 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 22 [2025-03-08 23:02:45,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:02:45,354 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2025-03-08 23:02:45,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 23:02:45,354 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2025-03-08 23:02:45,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-08 23:02:45,355 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:02:45,355 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:02:45,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-08 23:02:45,355 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:02:45,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:02:45,355 INFO L85 PathProgramCache]: Analyzing trace with hash -271064997, now seen corresponding path program 1 times [2025-03-08 23:02:45,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:02:45,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425311211] [2025-03-08 23:02:45,355 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:45,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:02:45,368 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 23:02:45,373 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 23:02:45,376 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:45,377 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:02:45,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:02:45,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425311211] [2025-03-08 23:02:45,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425311211] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:02:45,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:02:45,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2025-03-08 23:02:45,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330626886] [2025-03-08 23:02:45,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:02:45,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 23:02:45,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:02:45,546 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 23:02:45,546 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2025-03-08 23:02:45,546 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 23:02:45,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:02:45,829 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2025-03-08 23:02:45,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 23:02:45,830 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2025-03-08 23:02:45,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:02:45,830 INFO L225 Difference]: With dead ends: 81 [2025-03-08 23:02:45,830 INFO L226 Difference]: Without dead ends: 81 [2025-03-08 23:02:45,831 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2025-03-08 23:02:45,831 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 30 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 23:02:45,831 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 402 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 23:02:45,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-03-08 23:02:45,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2025-03-08 23:02:45,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 55 states have (on average 1.4545454545454546) internal successors, (80), 73 states have internal predecessors, (80), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 23:02:45,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2025-03-08 23:02:45,837 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 28 [2025-03-08 23:02:45,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:02:45,838 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2025-03-08 23:02:45,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 23:02:45,838 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2025-03-08 23:02:45,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-08 23:02:45,838 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:02:45,838 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:02:45,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-08 23:02:45,838 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:02:45,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:02:45,839 INFO L85 PathProgramCache]: Analyzing trace with hash -271064996, now seen corresponding path program 1 times [2025-03-08 23:02:45,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:02:45,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421110838] [2025-03-08 23:02:45,839 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:45,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:02:45,846 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 23:02:45,854 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 23:02:45,854 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:45,856 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:46,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:02:46,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:02:46,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421110838] [2025-03-08 23:02:46,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421110838] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:02:46,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:02:46,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2025-03-08 23:02:46,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898042001] [2025-03-08 23:02:46,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:02:46,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 23:02:46,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:02:46,127 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 23:02:46,127 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2025-03-08 23:02:46,128 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 14 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 23:02:46,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:02:46,418 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2025-03-08 23:02:46,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 23:02:46,418 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2025-03-08 23:02:46,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:02:46,419 INFO L225 Difference]: With dead ends: 95 [2025-03-08 23:02:46,419 INFO L226 Difference]: Without dead ends: 95 [2025-03-08 23:02:46,419 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2025-03-08 23:02:46,420 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 7 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 23:02:46,420 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 449 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 23:02:46,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2025-03-08 23:02:46,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2025-03-08 23:02:46,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 67 states have (on average 1.4029850746268657) internal successors, (94), 85 states have internal predecessors, (94), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 23:02:46,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 106 transitions. [2025-03-08 23:02:46,423 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 106 transitions. Word has length 28 [2025-03-08 23:02:46,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:02:46,423 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 106 transitions. [2025-03-08 23:02:46,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 23:02:46,423 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 106 transitions. [2025-03-08 23:02:46,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-08 23:02:46,423 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:02:46,424 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:02:46,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-08 23:02:46,424 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:02:46,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:02:46,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1570705152, now seen corresponding path program 1 times [2025-03-08 23:02:46,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:02:46,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984707009] [2025-03-08 23:02:46,424 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:46,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:02:46,430 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-08 23:02:46,434 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 23:02:46,434 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:46,434 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:02:46,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:02:46,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984707009] [2025-03-08 23:02:46,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984707009] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:02:46,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525525789] [2025-03-08 23:02:46,598 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:46,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:02:46,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:02:46,600 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) [2025-03-08 23:02:46,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 23:02:46,645 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-08 23:02:46,659 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 23:02:46,659 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:46,660 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:46,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-08 23:02:46,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:02:46,669 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 [2025-03-08 23:02:46,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 23:02:46,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-03-08 23:02:46,705 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1))) is different from true [2025-03-08 23:02:46,718 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-03-08 23:02:46,718 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 [2025-03-08 23:02:46,727 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2025-03-08 23:02:46,727 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:02:46,848 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:02:46,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525525789] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 23:02:46,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 23:02:46,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 13 [2025-03-08 23:02:46,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97263092] [2025-03-08 23:02:46,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 23:02:46,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 23:02:46,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:02:46,849 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 23:02:46,849 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=126, Unknown=1, NotChecked=22, Total=182 [2025-03-08 23:02:46,849 INFO L87 Difference]: Start difference. First operand 94 states and 106 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-08 23:02:47,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:02:47,064 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2025-03-08 23:02:47,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 23:02:47,064 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 30 [2025-03-08 23:02:47,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:02:47,065 INFO L225 Difference]: With dead ends: 93 [2025-03-08 23:02:47,065 INFO L226 Difference]: Without dead ends: 93 [2025-03-08 23:02:47,065 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=197, Unknown=1, NotChecked=28, Total=272 [2025-03-08 23:02:47,066 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 8 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 23:02:47,066 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 489 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 315 Invalid, 0 Unknown, 81 Unchecked, 0.2s Time] [2025-03-08 23:02:47,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2025-03-08 23:02:47,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2025-03-08 23:02:47,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 67 states have (on average 1.3880597014925373) internal successors, (93), 84 states have internal predecessors, (93), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 23:02:47,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2025-03-08 23:02:47,069 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 30 [2025-03-08 23:02:47,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:02:47,069 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2025-03-08 23:02:47,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-08 23:02:47,069 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2025-03-08 23:02:47,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-08 23:02:47,070 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:02:47,070 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:02:47,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-08 23:02:47,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:02:47,274 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:02:47,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:02:47,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1570705153, now seen corresponding path program 1 times [2025-03-08 23:02:47,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:02:47,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661181] [2025-03-08 23:02:47,275 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:47,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:02:47,280 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-08 23:02:47,286 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 23:02:47,286 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:47,286 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:47,504 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:02:47,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:02:47,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661181] [2025-03-08 23:02:47,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661181] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:02:47,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623916833] [2025-03-08 23:02:47,504 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:47,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:02:47,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:02:47,508 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) [2025-03-08 23:02:47,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 23:02:47,555 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-08 23:02:47,571 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 23:02:47,571 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:47,571 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:47,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-08 23:02:47,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:02:47,581 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 [2025-03-08 23:02:47,584 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 [2025-03-08 23:02:47,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 23:02:47,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 23:02:47,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2025-03-08 23:02:47,750 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2025-03-08 23:02:47,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:02:47,769 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 [2025-03-08 23:02:47,774 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-08 23:02:47,774 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 [2025-03-08 23:02:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2025-03-08 23:02:47,777 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:02:47,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623916833] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:02:47,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 23:02:47,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2025-03-08 23:02:47,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570067454] [2025-03-08 23:02:47,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 23:02:47,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 23:02:47,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:02:47,852 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 23:02:47,852 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=332, Unknown=1, NotChecked=36, Total=420 [2025-03-08 23:02:47,853 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 15 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-08 23:02:48,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:02:48,149 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2025-03-08 23:02:48,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 23:02:48,150 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 15 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 30 [2025-03-08 23:02:48,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:02:48,151 INFO L225 Difference]: With dead ends: 91 [2025-03-08 23:02:48,151 INFO L226 Difference]: Without dead ends: 91 [2025-03-08 23:02:48,151 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=479, Unknown=1, NotChecked=44, Total=600 [2025-03-08 23:02:48,152 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 3 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 23:02:48,152 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 715 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 431 Invalid, 0 Unknown, 81 Unchecked, 0.2s Time] [2025-03-08 23:02:48,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2025-03-08 23:02:48,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2025-03-08 23:02:48,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.375) internal successors, (88), 79 states have internal predecessors, (88), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 23:02:48,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2025-03-08 23:02:48,156 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 30 [2025-03-08 23:02:48,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:02:48,156 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2025-03-08 23:02:48,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 15 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-08 23:02:48,157 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2025-03-08 23:02:48,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-08 23:02:48,159 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:02:48,159 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:02:48,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-08 23:02:48,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:02:48,363 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:02:48,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:02:48,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1499564815, now seen corresponding path program 1 times [2025-03-08 23:02:48,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:02:48,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415955733] [2025-03-08 23:02:48,364 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:48,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:02:48,371 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-08 23:02:48,374 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 23:02:48,374 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:48,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:48,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:02:48,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:02:48,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415955733] [2025-03-08 23:02:48,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415955733] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:02:48,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:02:48,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-08 23:02:48,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957969] [2025-03-08 23:02:48,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:02:48,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 23:02:48,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:02:48,426 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 23:02:48,426 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-08 23:02:48,426 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 23:02:48,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:02:48,468 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2025-03-08 23:02:48,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 23:02:48,468 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2025-03-08 23:02:48,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:02:48,469 INFO L225 Difference]: With dead ends: 92 [2025-03-08 23:02:48,469 INFO L226 Difference]: Without dead ends: 92 [2025-03-08 23:02:48,469 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-08 23:02:48,470 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 25 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 23:02:48,470 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 479 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 23:02:48,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2025-03-08 23:02:48,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2025-03-08 23:02:48,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.34375) internal successors, (86), 79 states have internal predecessors, (86), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-08 23:02:48,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2025-03-08 23:02:48,472 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 30 [2025-03-08 23:02:48,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:02:48,472 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2025-03-08 23:02:48,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 23:02:48,472 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2025-03-08 23:02:48,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-08 23:02:48,473 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:02:48,473 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:02:48,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-03-08 23:02:48,473 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:02:48,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:02:48,473 INFO L85 PathProgramCache]: Analyzing trace with hash -755566779, now seen corresponding path program 1 times [2025-03-08 23:02:48,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:02:48,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861876256] [2025-03-08 23:02:48,473 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:48,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:02:48,479 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-08 23:02:48,483 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 23:02:48,487 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:48,487 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:48,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:02:48,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:02:48,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861876256] [2025-03-08 23:02:48,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861876256] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:02:48,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006841344] [2025-03-08 23:02:48,587 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:48,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:02:48,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:02:48,589 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) [2025-03-08 23:02:48,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 23:02:48,641 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-08 23:02:48,658 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 23:02:48,658 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:48,658 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:48,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 23:02:48,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:02:48,676 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2025-03-08 23:02:48,705 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-03-08 23:02:48,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-03-08 23:02:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:02:48,709 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 23:02:48,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006841344] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:02:48,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 23:02:48,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 10 [2025-03-08 23:02:48,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694304583] [2025-03-08 23:02:48,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:02:48,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 23:02:48,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:02:48,710 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 23:02:48,710 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=69, Unknown=1, NotChecked=16, Total=110 [2025-03-08 23:02:48,710 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 23:02:48,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:02:48,751 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2025-03-08 23:02:48,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 23:02:48,752 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2025-03-08 23:02:48,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:02:48,752 INFO L225 Difference]: With dead ends: 93 [2025-03-08 23:02:48,752 INFO L226 Difference]: Without dead ends: 93 [2025-03-08 23:02:48,752 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=69, Unknown=1, NotChecked=16, Total=110 [2025-03-08 23:02:48,753 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 9 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 23:02:48,753 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 139 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 95 Unchecked, 0.0s Time] [2025-03-08 23:02:48,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2025-03-08 23:02:48,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2025-03-08 23:02:48,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 67 states have (on average 1.3582089552238805) internal successors, (91), 82 states have internal predecessors, (91), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 23:02:48,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2025-03-08 23:02:48,756 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 32 [2025-03-08 23:02:48,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:02:48,756 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2025-03-08 23:02:48,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 23:02:48,756 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2025-03-08 23:02:48,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-08 23:02:48,756 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:02:48,756 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:02:48,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-08 23:02:48,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-08 23:02:48,957 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:02:48,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:02:48,957 INFO L85 PathProgramCache]: Analyzing trace with hash -755566778, now seen corresponding path program 1 times [2025-03-08 23:02:48,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:02:48,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740139891] [2025-03-08 23:02:48,958 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:48,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:02:48,967 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-08 23:02:48,970 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 23:02:48,970 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:48,970 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:49,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:02:49,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:02:49,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740139891] [2025-03-08 23:02:49,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740139891] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:02:49,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411300258] [2025-03-08 23:02:49,147 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:49,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:02:49,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:02:49,150 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) [2025-03-08 23:02:49,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 23:02:49,196 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-08 23:02:49,214 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 23:02:49,215 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:49,215 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:49,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-08 23:02:49,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:02:49,296 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2025-03-08 23:02:49,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:02:49,315 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 16 treesize of output 11 [2025-03-08 23:02:49,321 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-08 23:02:49,322 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 [2025-03-08 23:02:49,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2025-03-08 23:02:49,336 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:02:49,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411300258] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:02:49,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 23:02:49,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2025-03-08 23:02:49,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553266796] [2025-03-08 23:02:49,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 23:02:49,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 23:02:49,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:02:49,404 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 23:02:49,404 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=285, Unknown=1, NotChecked=34, Total=380 [2025-03-08 23:02:49,404 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 13 states have internal predecessors, (41), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-08 23:02:49,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:02:49,573 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2025-03-08 23:02:49,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 23:02:49,573 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 13 states have internal predecessors, (41), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2025-03-08 23:02:49,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:02:49,574 INFO L225 Difference]: With dead ends: 100 [2025-03-08 23:02:49,574 INFO L226 Difference]: Without dead ends: 100 [2025-03-08 23:02:49,574 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=351, Unknown=1, NotChecked=38, Total=462 [2025-03-08 23:02:49,575 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 43 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 23:02:49,575 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 486 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 238 Invalid, 0 Unknown, 85 Unchecked, 0.1s Time] [2025-03-08 23:02:49,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2025-03-08 23:02:49,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2025-03-08 23:02:49,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 72 states have (on average 1.3472222222222223) internal successors, (97), 87 states have internal predecessors, (97), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 23:02:49,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 109 transitions. [2025-03-08 23:02:49,577 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 109 transitions. Word has length 32 [2025-03-08 23:02:49,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:02:49,577 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 109 transitions. [2025-03-08 23:02:49,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 13 states have internal predecessors, (41), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-08 23:02:49,577 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 109 transitions. [2025-03-08 23:02:49,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-03-08 23:02:49,577 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:02:49,577 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:02:49,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-08 23:02:49,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-08 23:02:49,778 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:02:49,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:02:49,779 INFO L85 PathProgramCache]: Analyzing trace with hash -758807227, now seen corresponding path program 1 times [2025-03-08 23:02:49,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:02:49,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987845882] [2025-03-08 23:02:49,779 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:49,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:02:49,786 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-08 23:02:49,790 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-08 23:02:49,790 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:49,790 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:49,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:02:49,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:02:49,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987845882] [2025-03-08 23:02:49,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987845882] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:02:49,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:02:49,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-08 23:02:49,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317705253] [2025-03-08 23:02:49,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:02:49,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 23:02:49,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:02:49,869 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 23:02:49,869 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-08 23:02:49,869 INFO L87 Difference]: Start difference. First operand 96 states and 109 transitions. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 23:02:49,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:02:49,949 INFO L93 Difference]: Finished difference Result 100 states and 113 transitions. [2025-03-08 23:02:49,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 23:02:49,950 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2025-03-08 23:02:49,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:02:49,950 INFO L225 Difference]: With dead ends: 100 [2025-03-08 23:02:49,950 INFO L226 Difference]: Without dead ends: 100 [2025-03-08 23:02:49,951 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-08 23:02:49,951 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 21 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 23:02:49,951 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 400 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 23:02:49,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2025-03-08 23:02:49,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2025-03-08 23:02:49,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 75 states have (on average 1.3466666666666667) internal successors, (101), 90 states have internal predecessors, (101), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 23:02:49,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 113 transitions. [2025-03-08 23:02:49,954 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 113 transitions. Word has length 31 [2025-03-08 23:02:49,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:02:49,954 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 113 transitions. [2025-03-08 23:02:49,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 23:02:49,954 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 113 transitions. [2025-03-08 23:02:49,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-08 23:02:49,954 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:02:49,954 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:02:49,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-03-08 23:02:49,955 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:02:49,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:02:49,955 INFO L85 PathProgramCache]: Analyzing trace with hash 833706895, now seen corresponding path program 1 times [2025-03-08 23:02:49,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:02:49,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663730455] [2025-03-08 23:02:49,955 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:49,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:02:49,961 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-08 23:02:49,964 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-08 23:02:49,965 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:49,965 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:02:50,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:02:50,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663730455] [2025-03-08 23:02:50,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663730455] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:02:50,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:02:50,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 23:02:50,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730880166] [2025-03-08 23:02:50,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:02:50,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 23:02:50,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:02:50,083 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 23:02:50,083 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-08 23:02:50,084 INFO L87 Difference]: Start difference. First operand 99 states and 113 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-08 23:02:50,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:02:50,158 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2025-03-08 23:02:50,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 23:02:50,158 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2025-03-08 23:02:50,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:02:50,159 INFO L225 Difference]: With dead ends: 98 [2025-03-08 23:02:50,159 INFO L226 Difference]: Without dead ends: 98 [2025-03-08 23:02:50,159 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-08 23:02:50,159 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 4 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 23:02:50,160 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 306 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 23:02:50,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-08 23:02:50,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2025-03-08 23:02:50,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 75 states have (on average 1.32) internal successors, (99), 89 states have internal predecessors, (99), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 23:02:50,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 111 transitions. [2025-03-08 23:02:50,162 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 111 transitions. Word has length 35 [2025-03-08 23:02:50,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:02:50,163 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 111 transitions. [2025-03-08 23:02:50,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-08 23:02:50,163 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 111 transitions. [2025-03-08 23:02:50,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-08 23:02:50,164 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:02:50,164 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:02:50,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-03-08 23:02:50,164 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:02:50,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:02:50,165 INFO L85 PathProgramCache]: Analyzing trace with hash 833706894, now seen corresponding path program 1 times [2025-03-08 23:02:50,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:02:50,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731418967] [2025-03-08 23:02:50,165 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:50,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:02:50,171 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-08 23:02:50,175 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-08 23:02:50,175 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:50,175 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 23:02:50,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:02:50,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731418967] [2025-03-08 23:02:50,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731418967] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:02:50,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:02:50,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 23:02:50,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536288988] [2025-03-08 23:02:50,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:02:50,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 23:02:50,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:02:50,257 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 23:02:50,258 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-08 23:02:50,258 INFO L87 Difference]: Start difference. First operand 98 states and 111 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-08 23:02:50,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:02:50,337 INFO L93 Difference]: Finished difference Result 97 states and 109 transitions. [2025-03-08 23:02:50,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 23:02:50,337 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2025-03-08 23:02:50,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:02:50,339 INFO L225 Difference]: With dead ends: 97 [2025-03-08 23:02:50,339 INFO L226 Difference]: Without dead ends: 97 [2025-03-08 23:02:50,339 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-08 23:02:50,339 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 3 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 23:02:50,339 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 280 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 23:02:50,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2025-03-08 23:02:50,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2025-03-08 23:02:50,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 75 states have (on average 1.2933333333333332) internal successors, (97), 88 states have internal predecessors, (97), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 23:02:50,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2025-03-08 23:02:50,343 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 35 [2025-03-08 23:02:50,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:02:50,344 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2025-03-08 23:02:50,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-08 23:02:50,344 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2025-03-08 23:02:50,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-08 23:02:50,344 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:02:50,344 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:02:50,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-03-08 23:02:50,344 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:02:50,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:02:50,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1213224364, now seen corresponding path program 1 times [2025-03-08 23:02:50,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:02:50,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96715826] [2025-03-08 23:02:50,345 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:50,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:02:50,352 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-08 23:02:50,357 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-08 23:02:50,358 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:50,358 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:02:50,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:02:50,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96715826] [2025-03-08 23:02:50,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96715826] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:02:50,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975833199] [2025-03-08 23:02:50,887 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:50,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:02:50,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:02:50,889 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) [2025-03-08 23:02:50,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 23:02:50,947 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-08 23:02:50,964 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-08 23:02:50,964 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:50,964 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:50,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 60 conjuncts are in the unsatisfiable core [2025-03-08 23:02:50,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:02:50,971 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 [2025-03-08 23:02:51,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 23:02:51,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 23:02:51,252 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-08 23:02:51,253 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 [2025-03-08 23:02:51,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-08 23:02:51,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-08 23:02:51,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-08 23:02:51,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-08 23:02:51,421 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:02:51,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2025-03-08 23:02:51,428 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:02:51,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2025-03-08 23:02:51,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:02:51,552 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:02:51,642 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_536 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~now~1#1.base| v_ArrVal_536) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0)) (forall ((v_ArrVal_537 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_~now~1#1.base| v_ArrVal_537) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0))) is different from false [2025-03-08 23:02:51,647 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_537 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_#t~ret9#1.base| v_ArrVal_537) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0)) (forall ((v_ArrVal_536 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~ret9#1.base| v_ArrVal_536) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0))) is different from false [2025-03-08 23:02:51,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975833199] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:02:51,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 23:02:51,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 33 [2025-03-08 23:02:51,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920313172] [2025-03-08 23:02:51,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 23:02:51,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-08 23:02:51,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:02:51,746 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-08 23:02:51,746 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1180, Unknown=2, NotChecked=138, Total=1406 [2025-03-08 23:02:51,746 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand has 33 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 28 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-08 23:02:52,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:02:52,569 INFO L93 Difference]: Finished difference Result 102 states and 116 transitions. [2025-03-08 23:02:52,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-08 23:02:52,570 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 28 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2025-03-08 23:02:52,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:02:52,571 INFO L225 Difference]: With dead ends: 102 [2025-03-08 23:02:52,571 INFO L226 Difference]: Without dead ends: 102 [2025-03-08 23:02:52,572 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=152, Invalid=2110, Unknown=2, NotChecked=186, Total=2450 [2025-03-08 23:02:52,573 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 18 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-08 23:02:52,573 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1109 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1066 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-08 23:02:52,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2025-03-08 23:02:52,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2025-03-08 23:02:52,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.2820512820512822) internal successors, (100), 91 states have internal predecessors, (100), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 23:02:52,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 112 transitions. [2025-03-08 23:02:52,577 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 112 transitions. Word has length 34 [2025-03-08 23:02:52,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:02:52,578 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 112 transitions. [2025-03-08 23:02:52,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 28 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-08 23:02:52,578 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 112 transitions. [2025-03-08 23:02:52,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-08 23:02:52,578 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:02:52,578 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:02:52,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-08 23:02:52,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:02:52,779 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:02:52,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:02:52,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1972454712, now seen corresponding path program 1 times [2025-03-08 23:02:52,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:02:52,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960937453] [2025-03-08 23:02:52,780 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:52,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:02:52,788 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-08 23:02:52,793 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 23:02:52,793 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:52,794 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:02:52,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:02:52,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960937453] [2025-03-08 23:02:52,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960937453] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:02:52,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434522877] [2025-03-08 23:02:52,996 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:52,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:02:52,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:02:52,998 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:02:52,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 23:02:53,056 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-08 23:02:53,076 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 23:02:53,076 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:53,076 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:53,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-03-08 23:02:53,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:02:53,082 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 [2025-03-08 23:02:53,122 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-08 23:02:53,122 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 [2025-03-08 23:02:53,179 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 [2025-03-08 23:02:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:02:53,187 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:02:53,234 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:02:53,234 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 17 treesize of output 21 [2025-03-08 23:02:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:02:53,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434522877] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 23:02:53,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 23:02:53,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 27 [2025-03-08 23:02:53,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019028163] [2025-03-08 23:02:53,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 23:02:53,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-08 23:02:53,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:02:53,412 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-08 23:02:53,412 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=692, Unknown=0, NotChecked=0, Total=756 [2025-03-08 23:02:53,413 INFO L87 Difference]: Start difference. First operand 100 states and 112 transitions. Second operand has 28 states, 25 states have (on average 2.0) internal successors, (50), 22 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-08 23:02:54,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:02:54,054 INFO L93 Difference]: Finished difference Result 127 states and 146 transitions. [2025-03-08 23:02:54,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-08 23:02:54,054 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.0) internal successors, (50), 22 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2025-03-08 23:02:54,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:02:54,055 INFO L225 Difference]: With dead ends: 127 [2025-03-08 23:02:54,055 INFO L226 Difference]: Without dead ends: 127 [2025-03-08 23:02:54,056 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2025-03-08 23:02:54,056 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 79 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-08 23:02:54,056 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 632 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-08 23:02:54,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2025-03-08 23:02:54,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 114. [2025-03-08 23:02:54,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 93 states have (on average 1.2903225806451613) internal successors, (120), 105 states have internal predecessors, (120), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 23:02:54,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions. [2025-03-08 23:02:54,062 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 36 [2025-03-08 23:02:54,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:02:54,063 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 132 transitions. [2025-03-08 23:02:54,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.0) internal successors, (50), 22 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-08 23:02:54,063 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions. [2025-03-08 23:02:54,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-08 23:02:54,064 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:02:54,064 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:02:54,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-08 23:02:54,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:02:54,268 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:02:54,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:02:54,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1972454711, now seen corresponding path program 1 times [2025-03-08 23:02:54,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:02:54,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801754301] [2025-03-08 23:02:54,268 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:54,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:02:54,276 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-08 23:02:54,283 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 23:02:54,284 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:54,284 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:54,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:02:54,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:02:54,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801754301] [2025-03-08 23:02:54,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801754301] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:02:54,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:02:54,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-08 23:02:54,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547900950] [2025-03-08 23:02:54,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:02:54,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 23:02:54,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:02:54,401 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 23:02:54,401 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-08 23:02:54,402 INFO L87 Difference]: Start difference. First operand 114 states and 132 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 23:02:54,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:02:54,514 INFO L93 Difference]: Finished difference Result 141 states and 166 transitions. [2025-03-08 23:02:54,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 23:02:54,514 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2025-03-08 23:02:54,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:02:54,516 INFO L225 Difference]: With dead ends: 141 [2025-03-08 23:02:54,517 INFO L226 Difference]: Without dead ends: 141 [2025-03-08 23:02:54,517 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-08 23:02:54,517 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 7 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 23:02:54,518 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 363 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 23:02:54,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2025-03-08 23:02:54,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 137. [2025-03-08 23:02:54,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 116 states have (on average 1.3275862068965518) internal successors, (154), 128 states have internal predecessors, (154), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 23:02:54,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 166 transitions. [2025-03-08 23:02:54,525 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 166 transitions. Word has length 36 [2025-03-08 23:02:54,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:02:54,526 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 166 transitions. [2025-03-08 23:02:54,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 23:02:54,526 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 166 transitions. [2025-03-08 23:02:54,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-08 23:02:54,526 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:02:54,526 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:02:54,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2025-03-08 23:02:54,527 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:02:54,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:02:54,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1016553236, now seen corresponding path program 1 times [2025-03-08 23:02:54,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:02:54,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867453331] [2025-03-08 23:02:54,527 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:54,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:02:54,533 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-08 23:02:54,537 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 23:02:54,537 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:54,537 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:54,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:02:54,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:02:54,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867453331] [2025-03-08 23:02:54,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867453331] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:02:54,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:02:54,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-08 23:02:54,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034894885] [2025-03-08 23:02:54,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:02:54,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 23:02:54,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:02:54,587 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 23:02:54,587 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-08 23:02:54,587 INFO L87 Difference]: Start difference. First operand 137 states and 166 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 23:02:54,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:02:54,628 INFO L93 Difference]: Finished difference Result 144 states and 173 transitions. [2025-03-08 23:02:54,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 23:02:54,631 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2025-03-08 23:02:54,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:02:54,631 INFO L225 Difference]: With dead ends: 144 [2025-03-08 23:02:54,631 INFO L226 Difference]: Without dead ends: 144 [2025-03-08 23:02:54,632 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-08 23:02:54,632 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 22 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 23:02:54,633 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 449 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 23:02:54,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2025-03-08 23:02:54,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 138. [2025-03-08 23:02:54,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 117 states have (on average 1.2991452991452992) internal successors, (152), 129 states have internal predecessors, (152), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 23:02:54,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 164 transitions. [2025-03-08 23:02:54,635 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 164 transitions. Word has length 37 [2025-03-08 23:02:54,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:02:54,636 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 164 transitions. [2025-03-08 23:02:54,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 23:02:54,636 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 164 transitions. [2025-03-08 23:02:54,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-03-08 23:02:54,636 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:02:54,636 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:02:54,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2025-03-08 23:02:54,636 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:02:54,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:02:54,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1278049311, now seen corresponding path program 1 times [2025-03-08 23:02:54,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:02:54,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074416182] [2025-03-08 23:02:54,637 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:54,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:02:54,660 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-03-08 23:02:54,664 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-03-08 23:02:54,664 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:54,664 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:02:54,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:02:54,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074416182] [2025-03-08 23:02:54,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074416182] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:02:54,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544878262] [2025-03-08 23:02:54,881 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:54,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:02:54,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:02:54,883 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:02:54,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 23:02:54,946 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-03-08 23:02:54,964 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-03-08 23:02:54,964 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:54,964 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:54,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-03-08 23:02:54,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:02:55,140 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-08 23:02:55,140 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 [2025-03-08 23:02:55,144 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 16 treesize of output 11 [2025-03-08 23:02:55,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:02:55,206 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:02:55,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544878262] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:02:55,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 23:02:55,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2025-03-08 23:02:55,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335829770] [2025-03-08 23:02:55,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 23:02:55,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-08 23:02:55,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:02:55,298 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-08 23:02:55,299 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2025-03-08 23:02:55,299 INFO L87 Difference]: Start difference. First operand 138 states and 164 transitions. Second operand has 26 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-08 23:02:55,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:02:55,644 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2025-03-08 23:02:55,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-08 23:02:55,644 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 40 [2025-03-08 23:02:55,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:02:55,645 INFO L225 Difference]: With dead ends: 160 [2025-03-08 23:02:55,645 INFO L226 Difference]: Without dead ends: 160 [2025-03-08 23:02:55,646 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2025-03-08 23:02:55,646 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 10 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 23:02:55,646 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 991 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 23:02:55,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2025-03-08 23:02:55,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2025-03-08 23:02:55,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 135 states have (on average 1.2740740740740741) internal successors, (172), 147 states have internal predecessors, (172), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-08 23:02:55,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 188 transitions. [2025-03-08 23:02:55,649 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 188 transitions. Word has length 40 [2025-03-08 23:02:55,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:02:55,650 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 188 transitions. [2025-03-08 23:02:55,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-08 23:02:55,650 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 188 transitions. [2025-03-08 23:02:55,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-08 23:02:55,650 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:02:55,650 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:02:55,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-08 23:02:55,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:02:55,855 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:02:55,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:02:55,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1950759605, now seen corresponding path program 1 times [2025-03-08 23:02:55,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:02:55,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620147448] [2025-03-08 23:02:55,856 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:55,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:02:55,869 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-08 23:02:55,873 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-08 23:02:55,874 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:55,874 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:55,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:02:55,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:02:55,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620147448] [2025-03-08 23:02:55,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620147448] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 23:02:55,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 23:02:55,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-08 23:02:55,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819186908] [2025-03-08 23:02:55,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 23:02:55,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 23:02:55,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:02:55,942 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 23:02:55,942 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-08 23:02:55,942 INFO L87 Difference]: Start difference. First operand 158 states and 188 transitions. Second operand has 9 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 23:02:56,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:02:56,012 INFO L93 Difference]: Finished difference Result 163 states and 195 transitions. [2025-03-08 23:02:56,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 23:02:56,013 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2025-03-08 23:02:56,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:02:56,013 INFO L225 Difference]: With dead ends: 163 [2025-03-08 23:02:56,013 INFO L226 Difference]: Without dead ends: 163 [2025-03-08 23:02:56,013 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-08 23:02:56,014 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 18 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 23:02:56,014 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 396 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 23:02:56,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2025-03-08 23:02:56,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2025-03-08 23:02:56,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 139 states have (on average 1.2877697841726619) internal successors, (179), 151 states have internal predecessors, (179), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-08 23:02:56,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 195 transitions. [2025-03-08 23:02:56,017 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 195 transitions. Word has length 39 [2025-03-08 23:02:56,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:02:56,018 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 195 transitions. [2025-03-08 23:02:56,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 23:02:56,018 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 195 transitions. [2025-03-08 23:02:56,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-03-08 23:02:56,018 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:02:56,018 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:02:56,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2025-03-08 23:02:56,019 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:02:56,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:02:56,019 INFO L85 PathProgramCache]: Analyzing trace with hash 123073057, now seen corresponding path program 1 times [2025-03-08 23:02:56,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:02:56,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730159956] [2025-03-08 23:02:56,019 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:56,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:02:56,025 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-08 23:02:56,027 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-08 23:02:56,027 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:56,027 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:56,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:02:56,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:02:56,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730159956] [2025-03-08 23:02:56,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730159956] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:02:56,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932456127] [2025-03-08 23:02:56,282 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:56,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:02:56,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:02:56,283 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:02:56,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 23:02:56,349 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-08 23:02:56,367 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-08 23:02:56,367 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:56,367 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:56,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-03-08 23:02:56,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:02:56,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 23:02:56,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 23:02:56,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-08 23:02:56,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-08 23:02:56,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:02:56,510 INFO L349 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2025-03-08 23:02:56,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2025-03-08 23:02:56,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:02:56,527 INFO L349 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2025-03-08 23:02:56,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2025-03-08 23:02:56,621 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:02:56,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2025-03-08 23:02:56,630 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:02:56,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2025-03-08 23:02:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:02:56,690 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:02:57,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2025-03-08 23:02:57,160 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 102 treesize of output 98 [2025-03-08 23:02:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:02:57,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932456127] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 23:02:57,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 23:02:57,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 30 [2025-03-08 23:02:57,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85991512] [2025-03-08 23:02:57,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 23:02:57,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-08 23:02:57,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:02:57,176 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-08 23:02:57,176 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2025-03-08 23:02:57,176 INFO L87 Difference]: Start difference. First operand 162 states and 195 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 27 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 23:02:57,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:02:57,645 INFO L93 Difference]: Finished difference Result 169 states and 198 transitions. [2025-03-08 23:02:57,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 23:02:57,645 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 27 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2025-03-08 23:02:57,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:02:57,646 INFO L225 Difference]: With dead ends: 169 [2025-03-08 23:02:57,646 INFO L226 Difference]: Without dead ends: 169 [2025-03-08 23:02:57,647 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=132, Invalid=1428, Unknown=0, NotChecked=0, Total=1560 [2025-03-08 23:02:57,647 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 20 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 23:02:57,647 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1125 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 23:02:57,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2025-03-08 23:02:57,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2025-03-08 23:02:57,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 142 states have (on average 1.2816901408450705) internal successors, (182), 154 states have internal predecessors, (182), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-08 23:02:57,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 198 transitions. [2025-03-08 23:02:57,654 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 198 transitions. Word has length 42 [2025-03-08 23:02:57,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:02:57,654 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 198 transitions. [2025-03-08 23:02:57,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 27 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 23:02:57,654 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 198 transitions. [2025-03-08 23:02:57,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-08 23:02:57,655 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:02:57,655 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:02:57,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-08 23:02:57,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-03-08 23:02:57,855 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:02:57,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:02:57,856 INFO L85 PathProgramCache]: Analyzing trace with hash -924667365, now seen corresponding path program 1 times [2025-03-08 23:02:57,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:02:57,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964543237] [2025-03-08 23:02:57,856 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:57,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:02:57,863 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-08 23:02:57,871 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-08 23:02:57,871 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:57,871 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:02:58,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:02:58,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964543237] [2025-03-08 23:02:58,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964543237] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:02:58,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987787259] [2025-03-08 23:02:58,218 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:58,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:02:58,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:02:58,220 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:02:58,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 23:02:58,287 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-08 23:02:58,308 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-08 23:02:58,309 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:58,309 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:02:58,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 57 conjuncts are in the unsatisfiable core [2025-03-08 23:02:58,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:02:58,317 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 [2025-03-08 23:02:58,319 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 [2025-03-08 23:02:58,470 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2025-03-08 23:02:58,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:02:58,486 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 [2025-03-08 23:02:58,491 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-08 23:02:58,491 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 [2025-03-08 23:02:58,589 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-08 23:02:58,590 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 14 treesize of output 13 [2025-03-08 23:02:58,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 23:02:58,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2025-03-08 23:02:58,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2025-03-08 23:02:58,743 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:02:58,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987787259] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:02:58,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 23:02:58,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2025-03-08 23:02:58,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678700623] [2025-03-08 23:02:58,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 23:02:58,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-08 23:02:58,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:02:58,885 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-08 23:02:58,885 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=955, Unknown=1, NotChecked=62, Total=1122 [2025-03-08 23:02:58,886 INFO L87 Difference]: Start difference. First operand 165 states and 198 transitions. Second operand has 31 states, 28 states have (on average 2.642857142857143) internal successors, (74), 26 states have internal predecessors, (74), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-08 23:02:59,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:02:59,474 INFO L93 Difference]: Finished difference Result 201 states and 238 transitions. [2025-03-08 23:02:59,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 23:02:59,475 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.642857142857143) internal successors, (74), 26 states have internal predecessors, (74), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 44 [2025-03-08 23:02:59,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:02:59,475 INFO L225 Difference]: With dead ends: 201 [2025-03-08 23:02:59,475 INFO L226 Difference]: Without dead ends: 201 [2025-03-08 23:02:59,476 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=1887, Unknown=1, NotChecked=88, Total=2162 [2025-03-08 23:02:59,476 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 27 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 23:02:59,476 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 798 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 867 Invalid, 0 Unknown, 107 Unchecked, 0.3s Time] [2025-03-08 23:02:59,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2025-03-08 23:02:59,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 197. [2025-03-08 23:02:59,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 172 states have (on average 1.2674418604651163) internal successors, (218), 184 states have internal predecessors, (218), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 23:02:59,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 238 transitions. [2025-03-08 23:02:59,482 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 238 transitions. Word has length 44 [2025-03-08 23:02:59,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:02:59,482 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 238 transitions. [2025-03-08 23:02:59,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.642857142857143) internal successors, (74), 26 states have internal predecessors, (74), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-08 23:02:59,482 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 238 transitions. [2025-03-08 23:02:59,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-08 23:02:59,482 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:02:59,482 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:02:59,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-08 23:02:59,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-03-08 23:02:59,687 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:02:59,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:02:59,687 INFO L85 PathProgramCache]: Analyzing trace with hash -479701837, now seen corresponding path program 1 times [2025-03-08 23:02:59,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:02:59,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974075414] [2025-03-08 23:02:59,687 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:02:59,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:02:59,695 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-08 23:02:59,699 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-08 23:02:59,699 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:02:59,699 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:03:00,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:03:00,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:03:00,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974075414] [2025-03-08 23:03:00,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974075414] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:03:00,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99849173] [2025-03-08 23:03:00,021 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:03:00,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:03:00,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:03:00,023 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:03:00,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 23:03:00,089 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-08 23:03:00,107 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-08 23:03:00,107 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:03:00,107 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:03:00,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-03-08 23:03:00,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:03:00,292 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-03-08 23:03:00,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 29 [2025-03-08 23:03:00,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:03:00,466 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:03:00,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99849173] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:03:00,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 23:03:00,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 31 [2025-03-08 23:03:00,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481490019] [2025-03-08 23:03:00,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 23:03:00,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-08 23:03:00,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:03:00,719 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-08 23:03:00,719 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2025-03-08 23:03:00,719 INFO L87 Difference]: Start difference. First operand 197 states and 238 transitions. Second operand has 32 states, 29 states have (on average 2.413793103448276) internal successors, (70), 27 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-08 23:03:01,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:03:01,058 INFO L93 Difference]: Finished difference Result 207 states and 247 transitions. [2025-03-08 23:03:01,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-08 23:03:01,059 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.413793103448276) internal successors, (70), 27 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 43 [2025-03-08 23:03:01,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:03:01,059 INFO L225 Difference]: With dead ends: 207 [2025-03-08 23:03:01,059 INFO L226 Difference]: Without dead ends: 188 [2025-03-08 23:03:01,060 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2025-03-08 23:03:01,060 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 23:03:01,060 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 638 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 23:03:01,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2025-03-08 23:03:01,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2025-03-08 23:03:01,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 163 states have (on average 1.2760736196319018) internal successors, (208), 175 states have internal predecessors, (208), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 23:03:01,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 228 transitions. [2025-03-08 23:03:01,063 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 228 transitions. Word has length 43 [2025-03-08 23:03:01,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:03:01,063 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 228 transitions. [2025-03-08 23:03:01,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.413793103448276) internal successors, (70), 27 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-08 23:03:01,064 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 228 transitions. [2025-03-08 23:03:01,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-08 23:03:01,064 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:03:01,064 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:03:01,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-08 23:03:01,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-08 23:03:01,264 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:03:01,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:03:01,265 INFO L85 PathProgramCache]: Analyzing trace with hash 729863705, now seen corresponding path program 1 times [2025-03-08 23:03:01,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:03:01,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546444032] [2025-03-08 23:03:01,265 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:03:01,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:03:01,272 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-08 23:03:01,277 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-08 23:03:01,277 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:03:01,278 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:03:01,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:03:01,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:03:01,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546444032] [2025-03-08 23:03:01,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546444032] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:03:01,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070063703] [2025-03-08 23:03:01,805 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:03:01,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:03:01,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:03:01,807 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:03:01,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 23:03:01,877 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-08 23:03:01,900 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-08 23:03:01,900 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:03:01,900 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:03:01,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 74 conjuncts are in the unsatisfiable core [2025-03-08 23:03:01,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:03:01,911 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 [2025-03-08 23:03:02,048 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2025-03-08 23:03:02,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2025-03-08 23:03:02,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 23:03:02,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:03:02,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 19 [2025-03-08 23:03:02,237 INFO L349 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2025-03-08 23:03:02,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2025-03-08 23:03:02,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2025-03-08 23:03:02,435 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:03:02,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2025-03-08 23:03:02,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-03-08 23:03:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:03:02,695 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:03:03,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070063703] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:03:03,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 23:03:03,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 44 [2025-03-08 23:03:03,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938760363] [2025-03-08 23:03:03,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 23:03:03,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-03-08 23:03:03,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:03:03,006 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-03-08 23:03:03,006 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2025-03-08 23:03:03,006 INFO L87 Difference]: Start difference. First operand 188 states and 228 transitions. Second operand has 45 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 37 states have internal predecessors, (75), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-08 23:03:03,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:03:03,979 INFO L93 Difference]: Finished difference Result 203 states and 248 transitions. [2025-03-08 23:03:03,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-08 23:03:03,979 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 37 states have internal predecessors, (75), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 46 [2025-03-08 23:03:03,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:03:03,980 INFO L225 Difference]: With dead ends: 203 [2025-03-08 23:03:03,980 INFO L226 Difference]: Without dead ends: 203 [2025-03-08 23:03:03,981 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=273, Invalid=4149, Unknown=0, NotChecked=0, Total=4422 [2025-03-08 23:03:03,981 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 46 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 1518 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1237 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-08 23:03:03,981 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 1237 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1518 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-08 23:03:03,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2025-03-08 23:03:03,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 192. [2025-03-08 23:03:03,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 167 states have (on average 1.281437125748503) internal successors, (214), 179 states have internal predecessors, (214), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 23:03:03,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 234 transitions. [2025-03-08 23:03:03,985 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 234 transitions. Word has length 46 [2025-03-08 23:03:03,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:03:03,985 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 234 transitions. [2025-03-08 23:03:03,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 37 states have internal predecessors, (75), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-08 23:03:03,985 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 234 transitions. [2025-03-08 23:03:03,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-08 23:03:03,985 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:03:03,986 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:03:03,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-08 23:03:04,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-03-08 23:03:04,190 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:03:04,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:03:04,190 INFO L85 PathProgramCache]: Analyzing trace with hash 729863706, now seen corresponding path program 1 times [2025-03-08 23:03:04,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:03:04,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689935511] [2025-03-08 23:03:04,191 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:03:04,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:03:04,200 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-08 23:03:04,208 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-08 23:03:04,208 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:03:04,208 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:03:04,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:03:04,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:03:04,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689935511] [2025-03-08 23:03:04,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689935511] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:03:04,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982504203] [2025-03-08 23:03:04,760 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:03:04,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:03:04,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:03:04,762 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:03:04,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 23:03:04,834 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-08 23:03:04,856 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-08 23:03:04,856 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:03:04,856 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:03:04,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 83 conjuncts are in the unsatisfiable core [2025-03-08 23:03:04,861 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:03:04,952 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 [2025-03-08 23:03:04,955 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 [2025-03-08 23:03:05,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 23:03:05,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 23:03:05,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:03:05,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2025-03-08 23:03:05,258 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2025-03-08 23:03:05,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 21 [2025-03-08 23:03:05,270 INFO L349 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2025-03-08 23:03:05,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2025-03-08 23:03:05,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-08 23:03:05,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-08 23:03:05,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 19 [2025-03-08 23:03:05,400 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:03:05,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2025-03-08 23:03:05,412 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:03:05,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 17 [2025-03-08 23:03:05,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:03:05,559 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:03:05,780 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1060 (Array Int Int)) (v_ArrVal_1061 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_~now~1#1.base| v_ArrVal_1060) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~now~1#1.base| v_ArrVal_1061) |c_ULTIMATE.start_main_~shared~0#1.base|) 0)))) (forall ((v_ArrVal_1060 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_~now~1#1.base| v_ArrVal_1060) |c_ULTIMATE.start_main_~shared~0#1.base|) 0)))) is different from false [2025-03-08 23:03:05,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982504203] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:03:05,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 23:03:05,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 40 [2025-03-08 23:03:05,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147116715] [2025-03-08 23:03:05,979 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 23:03:05,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-08 23:03:05,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:03:05,979 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-08 23:03:05,980 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2192, Unknown=28, NotChecked=94, Total=2450 [2025-03-08 23:03:05,980 INFO L87 Difference]: Start difference. First operand 192 states and 234 transitions. Second operand has 41 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 35 states have internal predecessors, (75), 5 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-08 23:03:06,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:03:06,864 INFO L93 Difference]: Finished difference Result 196 states and 239 transitions. [2025-03-08 23:03:06,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-08 23:03:06,864 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 35 states have internal predecessors, (75), 5 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 46 [2025-03-08 23:03:06,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:03:06,865 INFO L225 Difference]: With dead ends: 196 [2025-03-08 23:03:06,865 INFO L226 Difference]: Without dead ends: 196 [2025-03-08 23:03:06,866 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=221, Invalid=3414, Unknown=29, NotChecked=118, Total=3782 [2025-03-08 23:03:06,866 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 24 mSDsluCounter, 1434 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1507 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-08 23:03:06,866 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 1507 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1462 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-08 23:03:06,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2025-03-08 23:03:06,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2025-03-08 23:03:06,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 169 states have (on average 1.272189349112426) internal successors, (215), 181 states have internal predecessors, (215), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 23:03:06,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 235 transitions. [2025-03-08 23:03:06,869 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 235 transitions. Word has length 46 [2025-03-08 23:03:06,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:03:06,870 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 235 transitions. [2025-03-08 23:03:06,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 35 states have internal predecessors, (75), 5 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-08 23:03:06,870 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 235 transitions. [2025-03-08 23:03:06,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-03-08 23:03:06,870 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:03:06,870 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:03:06,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-08 23:03:07,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:03:07,071 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:03:07,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:03:07,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1565208188, now seen corresponding path program 1 times [2025-03-08 23:03:07,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:03:07,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217768132] [2025-03-08 23:03:07,071 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:03:07,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:03:07,080 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-03-08 23:03:07,084 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-03-08 23:03:07,084 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:03:07,084 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:03:07,359 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 23:03:07,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:03:07,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217768132] [2025-03-08 23:03:07,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217768132] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:03:07,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864890359] [2025-03-08 23:03:07,360 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:03:07,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:03:07,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:03:07,362 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:03:07,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 23:03:07,463 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-03-08 23:03:07,491 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-03-08 23:03:07,492 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:03:07,492 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:03:07,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-08 23:03:07,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:03:07,526 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-08 23:03:07,526 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 [2025-03-08 23:03:07,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 23:03:07,576 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2025-03-08 23:03:07,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2025-03-08 23:03:07,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2025-03-08 23:03:07,589 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2025-03-08 23:03:07,606 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-03-08 23:03:07,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-03-08 23:03:07,607 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 5 not checked. [2025-03-08 23:03:07,607 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:03:07,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864890359] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:03:07,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 23:03:07,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 22 [2025-03-08 23:03:07,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899539862] [2025-03-08 23:03:07,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 23:03:07,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 23:03:07,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:03:07,713 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 23:03:07,713 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=449, Unknown=1, NotChecked=42, Total=552 [2025-03-08 23:03:07,713 INFO L87 Difference]: Start difference. First operand 194 states and 235 transitions. Second operand has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 19 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-08 23:03:07,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:03:07,990 INFO L93 Difference]: Finished difference Result 193 states and 233 transitions. [2025-03-08 23:03:07,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 23:03:07,991 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 19 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2025-03-08 23:03:07,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:03:07,991 INFO L225 Difference]: With dead ends: 193 [2025-03-08 23:03:07,991 INFO L226 Difference]: Without dead ends: 193 [2025-03-08 23:03:07,992 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=662, Unknown=1, NotChecked=52, Total=812 [2025-03-08 23:03:07,992 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 11 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 23:03:07,992 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 800 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 557 Invalid, 0 Unknown, 66 Unchecked, 0.2s Time] [2025-03-08 23:03:07,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2025-03-08 23:03:07,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2025-03-08 23:03:07,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 169 states have (on average 1.2603550295857988) internal successors, (213), 180 states have internal predecessors, (213), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 23:03:07,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 233 transitions. [2025-03-08 23:03:07,996 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 233 transitions. Word has length 48 [2025-03-08 23:03:07,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:03:07,997 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 233 transitions. [2025-03-08 23:03:07,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 19 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-08 23:03:07,997 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 233 transitions. [2025-03-08 23:03:07,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-03-08 23:03:07,999 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:03:08,000 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:03:08,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-08 23:03:08,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:03:08,204 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:03:08,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:03:08,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1565208187, now seen corresponding path program 1 times [2025-03-08 23:03:08,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:03:08,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816044937] [2025-03-08 23:03:08,204 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:03:08,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:03:08,213 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-03-08 23:03:08,217 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-03-08 23:03:08,218 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:03:08,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:03:08,567 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:03:08,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:03:08,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816044937] [2025-03-08 23:03:08,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816044937] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:03:08,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447242867] [2025-03-08 23:03:08,567 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:03:08,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:03:08,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:03:08,569 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:03:08,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 23:03:08,643 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-03-08 23:03:08,666 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-03-08 23:03:08,666 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:03:08,666 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:03:08,667 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-03-08 23:03:08,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:03:08,682 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 [2025-03-08 23:03:08,727 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-08 23:03:08,727 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 [2025-03-08 23:03:08,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 23:03:08,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 23:03:08,799 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2025-03-08 23:03:08,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 52 [2025-03-08 23:03:08,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2025-03-08 23:03:08,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2025-03-08 23:03:08,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2025-03-08 23:03:08,883 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2025-03-08 23:03:08,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:03:08,898 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 [2025-03-08 23:03:08,907 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-08 23:03:08,907 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 [2025-03-08 23:03:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2025-03-08 23:03:08,925 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:03:08,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447242867] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:03:08,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 23:03:08,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 29 [2025-03-08 23:03:08,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709229018] [2025-03-08 23:03:08,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 23:03:08,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-08 23:03:08,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:03:08,998 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-08 23:03:08,998 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=842, Unknown=1, NotChecked=58, Total=992 [2025-03-08 23:03:08,998 INFO L87 Difference]: Start difference. First operand 193 states and 233 transitions. Second operand has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 23 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2025-03-08 23:03:09,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:03:09,371 INFO L93 Difference]: Finished difference Result 190 states and 227 transitions. [2025-03-08 23:03:09,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 23:03:09,372 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 23 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 48 [2025-03-08 23:03:09,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:03:09,372 INFO L225 Difference]: With dead ends: 190 [2025-03-08 23:03:09,372 INFO L226 Difference]: Without dead ends: 190 [2025-03-08 23:03:09,373 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=1248, Unknown=1, NotChecked=72, Total=1482 [2025-03-08 23:03:09,373 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 18 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 23:03:09,373 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 762 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 565 Invalid, 0 Unknown, 76 Unchecked, 0.2s Time] [2025-03-08 23:03:09,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2025-03-08 23:03:09,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2025-03-08 23:03:09,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 169 states have (on average 1.2248520710059172) internal successors, (207), 177 states have internal predecessors, (207), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 23:03:09,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 227 transitions. [2025-03-08 23:03:09,377 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 227 transitions. Word has length 48 [2025-03-08 23:03:09,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:03:09,377 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 227 transitions. [2025-03-08 23:03:09,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 23 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2025-03-08 23:03:09,377 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 227 transitions. [2025-03-08 23:03:09,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-08 23:03:09,378 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:03:09,378 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:03:09,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-08 23:03:09,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:03:09,582 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:03:09,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:03:09,582 INFO L85 PathProgramCache]: Analyzing trace with hash -2049782073, now seen corresponding path program 1 times [2025-03-08 23:03:09,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:03:09,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031535478] [2025-03-08 23:03:09,582 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:03:09,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:03:09,589 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-08 23:03:09,598 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-08 23:03:09,598 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:03:09,598 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:03:09,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:03:09,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:03:09,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031535478] [2025-03-08 23:03:09,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031535478] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:03:09,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378617455] [2025-03-08 23:03:09,964 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:03:09,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:03:09,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:03:09,967 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:03:09,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-08 23:03:10,052 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-08 23:03:10,075 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-08 23:03:10,075 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:03:10,075 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:03:10,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 56 conjuncts are in the unsatisfiable core [2025-03-08 23:03:10,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:03:10,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 23:03:10,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2025-03-08 23:03:10,316 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-08 23:03:10,316 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 [2025-03-08 23:03:10,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2025-03-08 23:03:10,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2025-03-08 23:03:10,448 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:03:10,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 17 [2025-03-08 23:03:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:03:10,530 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:03:10,731 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1348 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~ret9#1.base| v_ArrVal_1348) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) |c_#StackHeapBarrier|)) is different from false [2025-03-08 23:03:10,752 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1348 (Array Int Int)) (|v_ULTIMATE.start_create_#t~ret9#1.base_41| Int)) (or (< (select (select (store |c_#memory_$Pointer$#0.base| |v_ULTIMATE.start_create_#t~ret9#1.base_41| v_ArrVal_1348) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) |c_#StackHeapBarrier|) (not (= (select |c_#valid| |v_ULTIMATE.start_create_#t~ret9#1.base_41|) 0)))) is different from false [2025-03-08 23:03:10,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378617455] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:03:10,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 23:03:10,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 36 [2025-03-08 23:03:10,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853852553] [2025-03-08 23:03:10,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 23:03:10,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-03-08 23:03:10,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:03:10,753 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-03-08 23:03:10,753 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1457, Unknown=13, NotChecked=154, Total=1722 [2025-03-08 23:03:10,754 INFO L87 Difference]: Start difference. First operand 190 states and 227 transitions. Second operand has 37 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 31 states have internal predecessors, (70), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-08 23:03:11,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:03:11,499 INFO L93 Difference]: Finished difference Result 193 states and 232 transitions. [2025-03-08 23:03:11,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-08 23:03:11,500 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 31 states have internal predecessors, (70), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 49 [2025-03-08 23:03:11,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:03:11,501 INFO L225 Difference]: With dead ends: 193 [2025-03-08 23:03:11,501 INFO L226 Difference]: Without dead ends: 193 [2025-03-08 23:03:11,501 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=187, Invalid=2778, Unknown=13, NotChecked=214, Total=3192 [2025-03-08 23:03:11,502 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 22 mSDsluCounter, 1466 mSDsCounter, 0 mSdLazyCounter, 1337 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-08 23:03:11,502 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1534 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1337 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-08 23:03:11,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2025-03-08 23:03:11,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 191. [2025-03-08 23:03:11,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 170 states have (on average 1.223529411764706) internal successors, (208), 178 states have internal predecessors, (208), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 23:03:11,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 228 transitions. [2025-03-08 23:03:11,510 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 228 transitions. Word has length 49 [2025-03-08 23:03:11,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:03:11,510 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 228 transitions. [2025-03-08 23:03:11,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 31 states have internal predecessors, (70), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-08 23:03:11,512 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 228 transitions. [2025-03-08 23:03:11,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-08 23:03:11,513 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:03:11,513 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:03:11,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-08 23:03:11,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:03:11,713 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:03:11,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:03:11,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1889537837, now seen corresponding path program 1 times [2025-03-08 23:03:11,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:03:11,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924357431] [2025-03-08 23:03:11,714 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:03:11,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:03:11,721 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-08 23:03:11,725 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-08 23:03:11,725 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:03:11,725 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:03:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:03:12,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:03:12,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924357431] [2025-03-08 23:03:12,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924357431] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:03:12,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212368880] [2025-03-08 23:03:12,475 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:03:12,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:03:12,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:03:12,476 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:03:12,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-08 23:03:12,557 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-08 23:03:12,578 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-08 23:03:12,578 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:03:12,578 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:03:12,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 93 conjuncts are in the unsatisfiable core [2025-03-08 23:03:12,582 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:03:12,586 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 [2025-03-08 23:03:12,589 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 [2025-03-08 23:03:12,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 23:03:12,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 23:03:13,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:03:13,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-08 23:03:13,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:03:13,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-08 23:03:13,102 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2025-03-08 23:03:13,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2025-03-08 23:03:13,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-03-08 23:03:13,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:03:13,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-08 23:03:13,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:03:13,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-08 23:03:13,411 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-08 23:03:13,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2025-03-08 23:03:13,421 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-08 23:03:13,421 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 13 treesize of output 13 [2025-03-08 23:03:13,436 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-08 23:03:13,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2025-03-08 23:03:13,453 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2025-03-08 23:03:13,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2025-03-08 23:03:13,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-08 23:03:13,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-08 23:03:13,612 INFO L349 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2025-03-08 23:03:13,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 52 [2025-03-08 23:03:13,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 11 [2025-03-08 23:03:13,621 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 12 treesize of output 8 [2025-03-08 23:03:13,698 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:03:13,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2025-03-08 23:03:13,704 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:03:13,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2025-03-08 23:03:13,793 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:03:13,793 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:03:13,887 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1451 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_#t~mem12#1.base| v_ArrVal_1451) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0)) (forall ((v_ArrVal_1450 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~mem12#1.base| v_ArrVal_1450) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0))) is different from false [2025-03-08 23:03:13,891 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~now~1#1.base|) |c_ULTIMATE.start_create_~now~1#1.offset|))) (and (forall ((v_ArrVal_1450 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#0.base| .cse0 v_ArrVal_1450) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0)) (forall ((v_ArrVal_1451 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#0.offset| .cse0 v_ArrVal_1451) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0)))) is different from false [2025-03-08 23:03:14,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212368880] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:03:14,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 23:03:14,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 30] total 49 [2025-03-08 23:03:14,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686295211] [2025-03-08 23:03:14,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 23:03:14,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-03-08 23:03:14,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:03:14,112 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-03-08 23:03:14,112 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2569, Unknown=43, NotChecked=206, Total=2970 [2025-03-08 23:03:14,112 INFO L87 Difference]: Start difference. First operand 191 states and 228 transitions. Second operand has 49 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 41 states have internal predecessors, (79), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-08 23:03:15,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:03:15,318 INFO L93 Difference]: Finished difference Result 196 states and 234 transitions. [2025-03-08 23:03:15,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-08 23:03:15,318 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 41 states have internal predecessors, (79), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2025-03-08 23:03:15,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:03:15,319 INFO L225 Difference]: With dead ends: 196 [2025-03-08 23:03:15,319 INFO L226 Difference]: Without dead ends: 196 [2025-03-08 23:03:15,320 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=286, Invalid=4502, Unknown=50, NotChecked=274, Total=5112 [2025-03-08 23:03:15,320 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 32 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 1358 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-08 23:03:15,320 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 1133 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1358 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-08 23:03:15,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2025-03-08 23:03:15,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2025-03-08 23:03:15,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 173 states have (on average 1.2196531791907514) internal successors, (211), 181 states have internal predecessors, (211), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 23:03:15,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 231 transitions. [2025-03-08 23:03:15,323 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 231 transitions. Word has length 50 [2025-03-08 23:03:15,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:03:15,323 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 231 transitions. [2025-03-08 23:03:15,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 41 states have internal predecessors, (79), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-08 23:03:15,323 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 231 transitions. [2025-03-08 23:03:15,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-08 23:03:15,323 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:03:15,323 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:03:15,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-08 23:03:15,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:03:15,524 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:03:15,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:03:15,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1476196378, now seen corresponding path program 2 times [2025-03-08 23:03:15,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:03:15,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310608441] [2025-03-08 23:03:15,525 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 23:03:15,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:03:15,534 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 52 statements into 2 equivalence classes. [2025-03-08 23:03:15,540 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 52 of 52 statements. [2025-03-08 23:03:15,540 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 23:03:15,540 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:03:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:03:15,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:03:15,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310608441] [2025-03-08 23:03:15,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310608441] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:03:15,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435614686] [2025-03-08 23:03:15,867 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 23:03:15,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:03:15,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:03:15,869 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:03:15,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-08 23:03:15,957 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 52 statements into 2 equivalence classes. [2025-03-08 23:03:15,985 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 52 of 52 statements. [2025-03-08 23:03:15,985 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 23:03:15,986 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:03:15,987 INFO L256 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 59 conjuncts are in the unsatisfiable core [2025-03-08 23:03:15,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:03:16,039 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2025-03-08 23:03:16,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:03:16,051 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 [2025-03-08 23:03:16,056 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-08 23:03:16,056 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 [2025-03-08 23:03:16,126 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-08 23:03:16,126 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 14 treesize of output 13 [2025-03-08 23:03:16,233 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2025-03-08 23:03:16,233 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:03:16,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435614686] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:03:16,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 23:03:16,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 25 [2025-03-08 23:03:16,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323300532] [2025-03-08 23:03:16,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 23:03:16,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-08 23:03:16,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:03:16,398 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-08 23:03:16,399 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=783, Unknown=1, NotChecked=56, Total=930 [2025-03-08 23:03:16,399 INFO L87 Difference]: Start difference. First operand 194 states and 231 transitions. Second operand has 26 states, 25 states have (on average 2.68) internal successors, (67), 22 states have internal predecessors, (67), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-08 23:03:16,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:03:16,833 INFO L93 Difference]: Finished difference Result 247 states and 293 transitions. [2025-03-08 23:03:16,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 23:03:16,833 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.68) internal successors, (67), 22 states have internal predecessors, (67), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 52 [2025-03-08 23:03:16,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:03:16,835 INFO L225 Difference]: With dead ends: 247 [2025-03-08 23:03:16,835 INFO L226 Difference]: Without dead ends: 247 [2025-03-08 23:03:16,835 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=1266, Unknown=1, NotChecked=72, Total=1482 [2025-03-08 23:03:16,836 INFO L435 NwaCegarLoop]: 71 mSDtfsCounter, 33 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1049 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 23:03:16,836 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1049 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 744 Invalid, 0 Unknown, 121 Unchecked, 0.3s Time] [2025-03-08 23:03:16,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2025-03-08 23:03:16,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 230. [2025-03-08 23:03:16,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 206 states have (on average 1.1990291262135921) internal successors, (247), 214 states have internal predecessors, (247), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-08 23:03:16,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 273 transitions. [2025-03-08 23:03:16,840 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 273 transitions. Word has length 52 [2025-03-08 23:03:16,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:03:16,840 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 273 transitions. [2025-03-08 23:03:16,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.68) internal successors, (67), 22 states have internal predecessors, (67), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-08 23:03:16,840 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 273 transitions. [2025-03-08 23:03:16,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-08 23:03:16,840 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:03:16,840 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:03:16,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-08 23:03:17,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:03:17,041 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:03:17,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:03:17,041 INFO L85 PathProgramCache]: Analyzing trace with hash 787274130, now seen corresponding path program 2 times [2025-03-08 23:03:17,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:03:17,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939253648] [2025-03-08 23:03:17,041 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 23:03:17,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:03:17,049 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 52 statements into 2 equivalence classes. [2025-03-08 23:03:17,054 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 52 of 52 statements. [2025-03-08 23:03:17,054 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 23:03:17,054 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:03:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:03:17,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:03:17,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939253648] [2025-03-08 23:03:17,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939253648] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:03:17,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836913995] [2025-03-08 23:03:17,753 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 23:03:17,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:03:17,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:03:17,755 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:03:17,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-08 23:03:17,843 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 52 statements into 2 equivalence classes. [2025-03-08 23:03:17,871 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 52 of 52 statements. [2025-03-08 23:03:17,871 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 23:03:17,871 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:03:17,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 96 conjuncts are in the unsatisfiable core [2025-03-08 23:03:17,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:03:17,955 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 [2025-03-08 23:03:17,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 23:03:17,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 23:03:18,079 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2025-03-08 23:03:18,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2025-03-08 23:03:18,092 INFO L349 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2025-03-08 23:03:18,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2025-03-08 23:03:18,315 INFO L349 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2025-03-08 23:03:18,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2025-03-08 23:03:18,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2025-03-08 23:03:18,421 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2025-03-08 23:03:18,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 48 [2025-03-08 23:03:18,675 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 [2025-03-08 23:03:18,800 INFO L349 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2025-03-08 23:03:18,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 99 [2025-03-08 23:03:18,834 INFO L349 Elim1Store]: treesize reduction 48, result has 50.5 percent of original size [2025-03-08 23:03:18,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 95 treesize of output 106 [2025-03-08 23:03:18,865 INFO L349 Elim1Store]: treesize reduction 4, result has 91.8 percent of original size [2025-03-08 23:03:18,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 85 [2025-03-08 23:03:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:03:18,968 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:03:19,098 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 10 treesize of output 8 [2025-03-08 23:03:19,268 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1620 (Array Int Int)) (v_ArrVal_1619 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~now~1#1.base| v_ArrVal_1619) |c_ULTIMATE.start_main_~shared~0#1.base|) 0))) (or (= .cse0 |c_ULTIMATE.start_main_~shared~0#1.base|) (= (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_~now~1#1.base| v_ArrVal_1620) .cse0) 0) 0)))) (forall ((v_ArrVal_1619 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~now~1#1.base| v_ArrVal_1619))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_main_~shared~0#1.base|) 0))) (or (= (select (select .cse1 .cse2) 0) 0) (= .cse2 |c_ULTIMATE.start_main_~shared~0#1.base|)))))) is different from false [2025-03-08 23:03:19,279 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1619 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~ret9#1.base| v_ArrVal_1619))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~shared~0#1.base|) 0))) (or (= .cse0 |c_ULTIMATE.start_main_~shared~0#1.base|) (= (select (select .cse1 .cse0) 0) 0))))) (forall ((v_ArrVal_1620 (Array Int Int)) (v_ArrVal_1619 (Array Int Int))) (let ((.cse2 (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~ret9#1.base| v_ArrVal_1619) |c_ULTIMATE.start_main_~shared~0#1.base|) 0))) (or (= .cse2 |c_ULTIMATE.start_main_~shared~0#1.base|) (= (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_#t~ret9#1.base| v_ArrVal_1620) .cse2) 0) 0))))) is different from false [2025-03-08 23:03:19,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836913995] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:03:19,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 23:03:19,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 51 [2025-03-08 23:03:19,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217538779] [2025-03-08 23:03:19,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 23:03:19,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2025-03-08 23:03:19,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:03:19,386 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2025-03-08 23:03:19,387 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=3151, Unknown=2, NotChecked=226, Total=3540 [2025-03-08 23:03:19,387 INFO L87 Difference]: Start difference. First operand 230 states and 273 transitions. Second operand has 51 states, 49 states have (on average 1.653061224489796) internal successors, (81), 43 states have internal predecessors, (81), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-08 23:03:20,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:03:20,788 INFO L93 Difference]: Finished difference Result 233 states and 277 transitions. [2025-03-08 23:03:20,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-08 23:03:20,788 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 1.653061224489796) internal successors, (81), 43 states have internal predecessors, (81), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 52 [2025-03-08 23:03:20,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:03:20,789 INFO L225 Difference]: With dead ends: 233 [2025-03-08 23:03:20,789 INFO L226 Difference]: Without dead ends: 233 [2025-03-08 23:03:20,790 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=283, Invalid=5575, Unknown=2, NotChecked=302, Total=6162 [2025-03-08 23:03:20,791 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 24 mSDsluCounter, 1886 mSDsCounter, 0 mSdLazyCounter, 1966 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1952 SdHoareTripleChecker+Invalid, 1975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-08 23:03:20,791 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 1952 Invalid, 1975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1966 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-08 23:03:20,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2025-03-08 23:03:20,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2025-03-08 23:03:20,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 208 states have (on average 1.1971153846153846) internal successors, (249), 216 states have internal predecessors, (249), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-08 23:03:20,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 275 transitions. [2025-03-08 23:03:20,794 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 275 transitions. Word has length 52 [2025-03-08 23:03:20,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:03:20,794 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 275 transitions. [2025-03-08 23:03:20,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 1.653061224489796) internal successors, (81), 43 states have internal predecessors, (81), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-08 23:03:20,795 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 275 transitions. [2025-03-08 23:03:20,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-08 23:03:20,795 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:03:20,795 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:03:20,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-08 23:03:20,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2025-03-08 23:03:20,996 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:03:20,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:03:20,996 INFO L85 PathProgramCache]: Analyzing trace with hash 925326728, now seen corresponding path program 1 times [2025-03-08 23:03:20,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:03:20,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172671257] [2025-03-08 23:03:20,996 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:03:20,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:03:21,004 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-08 23:03:21,008 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-08 23:03:21,008 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:03:21,009 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:03:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 23:03:21,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:03:21,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172671257] [2025-03-08 23:03:21,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172671257] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:03:21,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506634317] [2025-03-08 23:03:21,128 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:03:21,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:03:21,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:03:21,129 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:03:21,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-08 23:03:21,227 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-08 23:03:21,251 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-08 23:03:21,251 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:03:21,251 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:03:21,253 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-08 23:03:21,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:03:21,259 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 [2025-03-08 23:03:21,370 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2025-03-08 23:03:21,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:03:21,382 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 [2025-03-08 23:03:21,386 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-08 23:03:21,386 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 [2025-03-08 23:03:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 5 not checked. [2025-03-08 23:03:21,477 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:03:21,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506634317] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:03:21,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 23:03:21,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 22 [2025-03-08 23:03:21,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547731868] [2025-03-08 23:03:21,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 23:03:21,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 23:03:21,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:03:21,639 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 23:03:21,639 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=679, Unknown=1, NotChecked=52, Total=812 [2025-03-08 23:03:21,639 INFO L87 Difference]: Start difference. First operand 232 states and 275 transitions. Second operand has 23 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 19 states have internal predecessors, (81), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-08 23:03:21,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:03:21,845 INFO L93 Difference]: Finished difference Result 249 states and 295 transitions. [2025-03-08 23:03:21,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 23:03:21,846 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 19 states have internal predecessors, (81), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2025-03-08 23:03:21,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:03:21,848 INFO L225 Difference]: With dead ends: 249 [2025-03-08 23:03:21,848 INFO L226 Difference]: Without dead ends: 249 [2025-03-08 23:03:21,848 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=944, Unknown=1, NotChecked=62, Total=1122 [2025-03-08 23:03:21,848 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 35 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 23:03:21,848 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 773 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 464 Invalid, 0 Unknown, 100 Unchecked, 0.1s Time] [2025-03-08 23:03:21,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2025-03-08 23:03:21,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 243. [2025-03-08 23:03:21,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 219 states have (on average 1.2100456621004567) internal successors, (265), 227 states have internal predecessors, (265), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-08 23:03:21,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 291 transitions. [2025-03-08 23:03:21,852 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 291 transitions. Word has length 52 [2025-03-08 23:03:21,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:03:21,852 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 291 transitions. [2025-03-08 23:03:21,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 19 states have internal predecessors, (81), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-08 23:03:21,852 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 291 transitions. [2025-03-08 23:03:21,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-03-08 23:03:21,853 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:03:21,853 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:03:21,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-03-08 23:03:22,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2025-03-08 23:03:22,053 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:03:22,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:03:22,054 INFO L85 PathProgramCache]: Analyzing trace with hash 656216710, now seen corresponding path program 1 times [2025-03-08 23:03:22,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:03:22,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366800621] [2025-03-08 23:03:22,054 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:03:22,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:03:22,063 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-03-08 23:03:22,066 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-03-08 23:03:22,066 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:03:22,067 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:03:22,551 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 23:03:22,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:03:22,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366800621] [2025-03-08 23:03:22,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366800621] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:03:22,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024254841] [2025-03-08 23:03:22,552 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:03:22,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:03:22,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:03:22,553 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:03:22,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-08 23:03:22,652 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-03-08 23:03:22,675 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-03-08 23:03:22,676 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:03:22,676 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:03:22,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 75 conjuncts are in the unsatisfiable core [2025-03-08 23:03:22,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:03:22,744 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 [2025-03-08 23:03:22,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 23:03:22,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:03:22,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2025-03-08 23:03:22,901 INFO L349 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2025-03-08 23:03:22,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2025-03-08 23:03:22,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 12 [2025-03-08 23:03:23,040 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:03:23,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2025-03-08 23:03:23,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-03-08 23:03:23,125 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 [2025-03-08 23:03:23,129 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:03:23,129 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:03:23,314 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:03:23,314 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 28 treesize of output 32 [2025-03-08 23:03:23,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024254841] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:03:23,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 23:03:23,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 40 [2025-03-08 23:03:23,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144928965] [2025-03-08 23:03:23,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 23:03:23,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-08 23:03:23,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:03:23,469 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-08 23:03:23,469 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1782, Unknown=0, NotChecked=0, Total=1892 [2025-03-08 23:03:23,470 INFO L87 Difference]: Start difference. First operand 243 states and 291 transitions. Second operand has 41 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 35 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-08 23:03:24,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:03:24,321 INFO L93 Difference]: Finished difference Result 250 states and 299 transitions. [2025-03-08 23:03:24,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-08 23:03:24,321 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 35 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 54 [2025-03-08 23:03:24,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:03:24,322 INFO L225 Difference]: With dead ends: 250 [2025-03-08 23:03:24,322 INFO L226 Difference]: Without dead ends: 250 [2025-03-08 23:03:24,323 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=208, Invalid=3452, Unknown=0, NotChecked=0, Total=3660 [2025-03-08 23:03:24,323 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 24 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1273 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-08 23:03:24,323 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 1273 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1390 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-08 23:03:24,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2025-03-08 23:03:24,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 243. [2025-03-08 23:03:24,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 219 states have (on average 1.2100456621004567) internal successors, (265), 227 states have internal predecessors, (265), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-08 23:03:24,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 291 transitions. [2025-03-08 23:03:24,327 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 291 transitions. Word has length 54 [2025-03-08 23:03:24,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:03:24,328 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 291 transitions. [2025-03-08 23:03:24,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 35 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-08 23:03:24,328 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 291 transitions. [2025-03-08 23:03:24,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-03-08 23:03:24,329 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:03:24,329 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:03:24,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-08 23:03:24,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2025-03-08 23:03:24,530 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:03:24,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:03:24,530 INFO L85 PathProgramCache]: Analyzing trace with hash 2101057166, now seen corresponding path program 1 times [2025-03-08 23:03:24,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:03:24,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320246080] [2025-03-08 23:03:24,530 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:03:24,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:03:24,538 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-08 23:03:24,541 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-08 23:03:24,541 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:03:24,541 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:03:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 23:03:24,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:03:24,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320246080] [2025-03-08 23:03:24,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320246080] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:03:24,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103712639] [2025-03-08 23:03:24,823 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 23:03:24,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:03:24,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:03:24,825 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:03:24,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-08 23:03:24,921 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-08 23:03:24,946 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-08 23:03:24,946 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 23:03:24,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:03:24,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-03-08 23:03:24,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:03:25,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 23:03:25,175 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-08 23:03:25,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2025-03-08 23:03:25,226 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-08 23:03:25,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2025-03-08 23:03:25,300 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 23:03:25,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 20 [2025-03-08 23:03:25,381 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 [2025-03-08 23:03:25,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:03:25,492 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 23:03:25,570 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 10 treesize of output 8 [2025-03-08 23:03:26,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2025-03-08 23:03:26,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 23:03:26,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103712639] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 23:03:26,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 23:03:26,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26, 26] total 53 [2025-03-08 23:03:26,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782023334] [2025-03-08 23:03:26,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 23:03:26,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2025-03-08 23:03:26,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 23:03:26,052 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2025-03-08 23:03:26,052 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2599, Unknown=4, NotChecked=0, Total=2756 [2025-03-08 23:03:26,053 INFO L87 Difference]: Start difference. First operand 243 states and 291 transitions. Second operand has 53 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 47 states have internal predecessors, (100), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-08 23:03:26,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 23:03:26,855 INFO L93 Difference]: Finished difference Result 244 states and 292 transitions. [2025-03-08 23:03:26,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-08 23:03:26,856 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 47 states have internal predecessors, (100), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 55 [2025-03-08 23:03:26,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 23:03:26,856 INFO L225 Difference]: With dead ends: 244 [2025-03-08 23:03:26,856 INFO L226 Difference]: Without dead ends: 244 [2025-03-08 23:03:26,857 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=271, Invalid=4555, Unknown=4, NotChecked=0, Total=4830 [2025-03-08 23:03:26,857 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 48 mSDsluCounter, 1727 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1796 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 23:03:26,857 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1796 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 23:03:26,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2025-03-08 23:03:26,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2025-03-08 23:03:26,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 219 states have (on average 1.2054794520547945) internal successors, (264), 227 states have internal predecessors, (264), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-08 23:03:26,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 290 transitions. [2025-03-08 23:03:26,861 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 290 transitions. Word has length 55 [2025-03-08 23:03:26,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 23:03:26,861 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 290 transitions. [2025-03-08 23:03:26,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 47 states have internal predecessors, (100), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-08 23:03:26,861 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 290 transitions. [2025-03-08 23:03:26,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-03-08 23:03:26,862 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 23:03:26,862 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 23:03:26,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-08 23:03:27,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:03:27,062 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-03-08 23:03:27,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 23:03:27,063 INFO L85 PathProgramCache]: Analyzing trace with hash -88243618, now seen corresponding path program 3 times [2025-03-08 23:03:27,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 23:03:27,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751726217] [2025-03-08 23:03:27,063 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 23:03:27,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 23:03:27,071 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 58 statements into 3 equivalence classes. [2025-03-08 23:03:27,082 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 58 of 58 statements. [2025-03-08 23:03:27,082 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-08 23:03:27,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:03:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 23:03:28,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 23:03:28,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751726217] [2025-03-08 23:03:28,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751726217] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 23:03:28,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318117996] [2025-03-08 23:03:28,193 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 23:03:28,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 23:03:28,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 23:03:28,195 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 23:03:28,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-08 23:03:28,294 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 58 statements into 3 equivalence classes. [2025-03-08 23:03:28,345 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 58 of 58 statements. [2025-03-08 23:03:28,345 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-08 23:03:28,345 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 23:03:28,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 105 conjuncts are in the unsatisfiable core [2025-03-08 23:03:28,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 23:03:28,355 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 [2025-03-08 23:03:28,397 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-08 23:03:28,397 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 [2025-03-08 23:03:28,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 23:03:28,568 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0) (= |c_#memory_$Pointer$#0.base| (store |c_old(#memory_$Pointer$#0.base)| alloc_and_zero_internal_~pi~1.base (select |c_#memory_$Pointer$#0.base| alloc_and_zero_internal_~pi~1.base))))) is different from true [2025-03-08 23:03:28,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:03:28,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 17 [2025-03-08 23:03:28,584 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-08 23:03:28,584 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 [2025-03-08 23:03:28,624 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2025-03-08 23:03:28,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2025-03-08 23:03:28,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-08 23:03:28,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-08 23:03:28,994 INFO L349 Elim1Store]: treesize reduction 40, result has 35.5 percent of original size [2025-03-08 23:03:28,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 46 [2025-03-08 23:03:29,007 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-03-08 23:03:29,008 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 1 case distinctions, treesize of input 12 treesize of output 14 [2025-03-08 23:03:29,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:03:29,341 INFO L349 Elim1Store]: treesize reduction 54, result has 43.2 percent of original size [2025-03-08 23:03:29,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 91 treesize of output 103 [2025-03-08 23:03:29,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 23:03:29,358 INFO L349 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2025-03-08 23:03:29,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2025-03-08 23:03:31,068 INFO L349 Elim1Store]: treesize reduction 144, result has 52.8 percent of original size [2025-03-08 23:03:31,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 35 case distinctions, treesize of input 405 treesize of output 493 [2025-03-08 23:03:31,148 INFO L349 Elim1Store]: treesize reduction 36, result has 64.4 percent of original size [2025-03-08 23:03:31,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 337 treesize of output 357