./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0214.i --full-output --architecture 32bit -------------------------------------------------------------------------------- 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/test-0214.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3f6f146d76d903376288fe056dbbc9e1a8443f92d5e8b82343734efc8a9842e4 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 22:48:14,235 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 22:48:14,291 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-08 22:48:14,296 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 22:48:14,296 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 22:48:14,319 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 22:48:14,319 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 22:48:14,320 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 22:48:14,320 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 22:48:14,320 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 22:48:14,321 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 22:48:14,321 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 22:48:14,322 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 22:48:14,322 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 22:48:14,322 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 22:48:14,322 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 22:48:14,322 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 22:48:14,322 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 22:48:14,322 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 22:48:14,323 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 22:48:14,323 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-08 22:48:14,323 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-08 22:48:14,323 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-08 22:48:14,323 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 22:48:14,323 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-08 22:48:14,323 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-08 22:48:14,323 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 22:48:14,323 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 22:48:14,323 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 22:48:14,323 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 22:48:14,323 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 22:48:14,323 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 22:48:14,324 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 22:48:14,324 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 22:48:14,324 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 22:48:14,324 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 22:48:14,324 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 22:48:14,324 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 22:48:14,324 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 22:48:14,324 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 22:48:14,324 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 22:48:14,324 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 22:48:14,324 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 -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f6f146d76d903376288fe056dbbc9e1a8443f92d5e8b82343734efc8a9842e4 [2025-03-08 22:48:14,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 22:48:14,569 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 22:48:14,572 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 22:48:14,573 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 22:48:14,573 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 22:48:14,574 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0214.i [2025-03-08 22:48:15,673 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c89b76d87/adf6b75925d94b26bffdd16155f7122f/FLAG62444a113 [2025-03-08 22:48:15,963 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 22:48:15,964 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0214.i [2025-03-08 22:48:15,976 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c89b76d87/adf6b75925d94b26bffdd16155f7122f/FLAG62444a113 [2025-03-08 22:48:16,243 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c89b76d87/adf6b75925d94b26bffdd16155f7122f [2025-03-08 22:48:16,245 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 22:48:16,246 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 22:48:16,247 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 22:48:16,247 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 22:48:16,250 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 22:48:16,251 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 10:48:16" (1/1) ... [2025-03-08 22:48:16,251 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d408809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:16, skipping insertion in model container [2025-03-08 22:48:16,251 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 10:48:16" (1/1) ... [2025-03-08 22:48:16,272 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 22:48:16,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 22:48:16,528 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 22:48:16,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 22:48:16,586 INFO L204 MainTranslator]: Completed translation [2025-03-08 22:48:16,587 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:16 WrapperNode [2025-03-08 22:48:16,587 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 22:48:16,588 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 22:48:16,588 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 22:48:16,588 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 22:48:16,591 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:16" (1/1) ... [2025-03-08 22:48:16,600 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:16" (1/1) ... [2025-03-08 22:48:16,615 INFO L138 Inliner]: procedures = 181, calls = 42, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 170 [2025-03-08 22:48:16,615 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 22:48:16,616 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 22:48:16,616 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 22:48:16,616 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 22:48:16,622 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:16" (1/1) ... [2025-03-08 22:48:16,622 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:16" (1/1) ... [2025-03-08 22:48:16,625 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:16" (1/1) ... [2025-03-08 22:48:16,641 INFO L175 MemorySlicer]: Split 27 memory accesses to 3 slices as follows [2, 7, 18]. 67 percent of accesses are in the largest equivalence class. The 4 initializations are split as follows [2, 0, 2]. The 11 writes are split as follows [0, 5, 6]. [2025-03-08 22:48:16,642 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:16" (1/1) ... [2025-03-08 22:48:16,642 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:16" (1/1) ... [2025-03-08 22:48:16,648 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:16" (1/1) ... [2025-03-08 22:48:16,649 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:16" (1/1) ... [2025-03-08 22:48:16,650 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:16" (1/1) ... [2025-03-08 22:48:16,651 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:16" (1/1) ... [2025-03-08 22:48:16,653 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 22:48:16,654 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 22:48:16,654 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 22:48:16,654 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 22:48:16,655 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:16" (1/1) ... [2025-03-08 22:48:16,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 22:48:16,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:48:16,680 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 22:48:16,682 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 22:48:16,700 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2025-03-08 22:48:16,700 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2025-03-08 22:48:16,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 22:48:16,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 22:48:16,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-08 22:48:16,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-08 22:48:16,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 22:48:16,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-03-08 22:48:16,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-03-08 22:48:16,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-03-08 22:48:16,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-03-08 22:48:16,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-03-08 22:48:16,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-03-08 22:48:16,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-08 22:48:16,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-03-08 22:48:16,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-03-08 22:48:16,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-03-08 22:48:16,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 22:48:16,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 22:48:16,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-08 22:48:16,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 22:48:16,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 22:48:16,809 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 22:48:16,810 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 22:48:17,097 INFO L? ?]: Removed 153 outVars from TransFormulas that were not future-live. [2025-03-08 22:48:17,097 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 22:48:17,105 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 22:48:17,105 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 22:48:17,105 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 10:48:17 BoogieIcfgContainer [2025-03-08 22:48:17,105 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 22:48:17,107 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 22:48:17,107 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 22:48:17,110 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 22:48:17,110 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 10:48:16" (1/3) ... [2025-03-08 22:48:17,111 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@675886eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 10:48:17, skipping insertion in model container [2025-03-08 22:48:17,111 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:48:16" (2/3) ... [2025-03-08 22:48:17,111 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@675886eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 10:48:17, skipping insertion in model container [2025-03-08 22:48:17,111 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 10:48:17" (3/3) ... [2025-03-08 22:48:17,112 INFO L128 eAbstractionObserver]: Analyzing ICFG test-0214.i [2025-03-08 22:48:17,122 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 22:48:17,123 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG test-0214.i that has 2 procedures, 141 locations, 1 initial locations, 5 loop locations, and 57 error locations. [2025-03-08 22:48:17,152 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 22:48:17,160 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;@4e480bb5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 22:48:17,160 INFO L334 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2025-03-08 22:48:17,163 INFO L276 IsEmpty]: Start isEmpty. Operand has 141 states, 80 states have (on average 1.95) internal successors, (156), 137 states have internal predecessors, (156), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 22:48:17,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-03-08 22:48:17,166 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:17,166 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-08 22:48:17,167 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:17,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:17,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1531849362, now seen corresponding path program 1 times [2025-03-08 22:48:17,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:17,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439512883] [2025-03-08 22:48:17,175 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:17,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:17,232 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-08 22:48:17,239 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-08 22:48:17,239 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:17,240 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:17,278 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 22:48:17,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:17,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439512883] [2025-03-08 22:48:17,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439512883] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:17,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:17,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 22:48:17,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532172894] [2025-03-08 22:48:17,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:17,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-08 22:48:17,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:17,326 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-08 22:48:17,326 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 22:48:17,328 INFO L87 Difference]: Start difference. First operand has 141 states, 80 states have (on average 1.95) internal successors, (156), 137 states have internal predecessors, (156), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:17,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:17,347 INFO L93 Difference]: Finished difference Result 141 states and 156 transitions. [2025-03-08 22:48:17,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-08 22:48:17,349 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2025-03-08 22:48:17,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:17,354 INFO L225 Difference]: With dead ends: 141 [2025-03-08 22:48:17,355 INFO L226 Difference]: Without dead ends: 139 [2025-03-08 22:48:17,357 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 22:48:17,358 INFO L435 NwaCegarLoop]: 156 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:17,360 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 22:48:17,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2025-03-08 22:48:17,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2025-03-08 22:48:17,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 79 states have (on average 1.8987341772151898) internal successors, (150), 135 states have internal predecessors, (150), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 22:48:17,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 154 transitions. [2025-03-08 22:48:17,399 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 154 transitions. Word has length 6 [2025-03-08 22:48:17,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:17,400 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 154 transitions. [2025-03-08 22:48:17,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:17,400 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 154 transitions. [2025-03-08 22:48:17,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-08 22:48:17,401 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:17,401 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:48:17,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 22:48:17,402 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:17,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:17,403 INFO L85 PathProgramCache]: Analyzing trace with hash 245879608, now seen corresponding path program 1 times [2025-03-08 22:48:17,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:17,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326925984] [2025-03-08 22:48:17,404 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:17,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:17,412 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-08 22:48:17,422 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-08 22:48:17,426 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:17,426 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:17,531 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 22:48:17,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:17,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326925984] [2025-03-08 22:48:17,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326925984] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:17,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:17,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-08 22:48:17,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356294496] [2025-03-08 22:48:17,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:17,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 22:48:17,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:17,533 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 22:48:17,534 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 22:48:17,534 INFO L87 Difference]: Start difference. First operand 139 states and 154 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:17,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:17,705 INFO L93 Difference]: Finished difference Result 269 states and 298 transitions. [2025-03-08 22:48:17,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 22:48:17,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-03-08 22:48:17,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:17,708 INFO L225 Difference]: With dead ends: 269 [2025-03-08 22:48:17,708 INFO L226 Difference]: Without dead ends: 269 [2025-03-08 22:48:17,708 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 22:48:17,708 INFO L435 NwaCegarLoop]: 99 mSDtfsCounter, 135 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:17,709 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 193 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 22:48:17,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2025-03-08 22:48:17,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 188. [2025-03-08 22:48:17,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 125 states have (on average 1.864) internal successors, (233), 181 states have internal predecessors, (233), 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 22:48:17,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 241 transitions. [2025-03-08 22:48:17,725 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 241 transitions. Word has length 7 [2025-03-08 22:48:17,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:17,726 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 241 transitions. [2025-03-08 22:48:17,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:17,726 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 241 transitions. [2025-03-08 22:48:17,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-08 22:48:17,726 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:17,726 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:48:17,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 22:48:17,727 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:17,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:17,728 INFO L85 PathProgramCache]: Analyzing trace with hash 245879609, now seen corresponding path program 1 times [2025-03-08 22:48:17,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:17,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204559794] [2025-03-08 22:48:17,728 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:17,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:17,734 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-08 22:48:17,739 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-08 22:48:17,740 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:17,740 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:17,829 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 22:48:17,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:17,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204559794] [2025-03-08 22:48:17,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204559794] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:17,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:17,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 22:48:17,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046436646] [2025-03-08 22:48:17,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:17,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 22:48:17,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:17,831 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 22:48:17,831 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 22:48:17,831 INFO L87 Difference]: Start difference. First operand 188 states and 241 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:17,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:17,968 INFO L93 Difference]: Finished difference Result 317 states and 395 transitions. [2025-03-08 22:48:17,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 22:48:17,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-03-08 22:48:17,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:17,970 INFO L225 Difference]: With dead ends: 317 [2025-03-08 22:48:17,970 INFO L226 Difference]: Without dead ends: 317 [2025-03-08 22:48:17,970 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 22:48:17,971 INFO L435 NwaCegarLoop]: 124 mSDtfsCounter, 105 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:17,971 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 325 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:48:17,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2025-03-08 22:48:17,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 261. [2025-03-08 22:48:17,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 192 states have (on average 1.8229166666666667) internal successors, (350), 250 states have internal predecessors, (350), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-08 22:48:17,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 366 transitions. [2025-03-08 22:48:17,988 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 366 transitions. Word has length 7 [2025-03-08 22:48:17,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:17,989 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 366 transitions. [2025-03-08 22:48:17,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:17,989 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 366 transitions. [2025-03-08 22:48:17,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-08 22:48:17,989 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:17,989 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:48:17,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 22:48:17,990 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:17,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:17,990 INFO L85 PathProgramCache]: Analyzing trace with hash 245879640, now seen corresponding path program 1 times [2025-03-08 22:48:17,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:17,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244581161] [2025-03-08 22:48:17,991 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:17,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:17,995 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-08 22:48:17,997 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-08 22:48:17,997 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:17,998 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:18,068 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 22:48:18,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:18,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244581161] [2025-03-08 22:48:18,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244581161] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:18,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:18,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 22:48:18,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196924727] [2025-03-08 22:48:18,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:18,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 22:48:18,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:18,072 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 22:48:18,072 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 22:48:18,072 INFO L87 Difference]: Start difference. First operand 261 states and 366 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:18,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:18,181 INFO L93 Difference]: Finished difference Result 316 states and 393 transitions. [2025-03-08 22:48:18,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 22:48:18,182 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-03-08 22:48:18,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:18,183 INFO L225 Difference]: With dead ends: 316 [2025-03-08 22:48:18,183 INFO L226 Difference]: Without dead ends: 316 [2025-03-08 22:48:18,183 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 22:48:18,184 INFO L435 NwaCegarLoop]: 125 mSDtfsCounter, 103 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:18,184 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 300 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:48:18,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2025-03-08 22:48:18,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 261. [2025-03-08 22:48:18,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 192 states have (on average 1.8229166666666667) internal successors, (350), 250 states have internal predecessors, (350), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-08 22:48:18,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 366 transitions. [2025-03-08 22:48:18,204 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 366 transitions. Word has length 7 [2025-03-08 22:48:18,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:18,205 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 366 transitions. [2025-03-08 22:48:18,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:18,205 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 366 transitions. [2025-03-08 22:48:18,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-08 22:48:18,205 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:18,205 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:48:18,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 22:48:18,205 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:18,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:18,206 INFO L85 PathProgramCache]: Analyzing trace with hash 2080151290, now seen corresponding path program 1 times [2025-03-08 22:48:18,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:18,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139590682] [2025-03-08 22:48:18,206 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:18,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:18,224 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-08 22:48:18,229 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-08 22:48:18,230 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:18,230 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:18,354 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 22:48:18,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:18,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139590682] [2025-03-08 22:48:18,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139590682] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:18,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:18,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 22:48:18,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543592194] [2025-03-08 22:48:18,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:18,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 22:48:18,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:18,355 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 22:48:18,355 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-08 22:48:18,356 INFO L87 Difference]: Start difference. First operand 261 states and 366 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:18,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:18,481 INFO L93 Difference]: Finished difference Result 398 states and 531 transitions. [2025-03-08 22:48:18,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 22:48:18,482 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-03-08 22:48:18,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:18,484 INFO L225 Difference]: With dead ends: 398 [2025-03-08 22:48:18,485 INFO L226 Difference]: Without dead ends: 398 [2025-03-08 22:48:18,485 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-08 22:48:18,485 INFO L435 NwaCegarLoop]: 138 mSDtfsCounter, 125 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:18,486 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 659 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:48:18,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2025-03-08 22:48:18,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 303. [2025-03-08 22:48:18,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 231 states have (on average 1.8051948051948052) internal successors, (417), 290 states have internal predecessors, (417), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 22:48:18,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 437 transitions. [2025-03-08 22:48:18,505 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 437 transitions. Word has length 10 [2025-03-08 22:48:18,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:18,505 INFO L471 AbstractCegarLoop]: Abstraction has 303 states and 437 transitions. [2025-03-08 22:48:18,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:18,505 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 437 transitions. [2025-03-08 22:48:18,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-08 22:48:18,505 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:18,505 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:48:18,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-08 22:48:18,506 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:18,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:18,506 INFO L85 PathProgramCache]: Analyzing trace with hash 2080150938, now seen corresponding path program 1 times [2025-03-08 22:48:18,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:18,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929985694] [2025-03-08 22:48:18,506 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:18,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:18,512 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-08 22:48:18,514 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-08 22:48:18,514 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:18,514 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:18,531 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 22:48:18,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:18,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929985694] [2025-03-08 22:48:18,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929985694] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:18,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:18,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 22:48:18,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881460839] [2025-03-08 22:48:18,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:18,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 22:48:18,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:18,533 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 22:48:18,533 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 22:48:18,533 INFO L87 Difference]: Start difference. First operand 303 states and 437 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:18,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:18,622 INFO L93 Difference]: Finished difference Result 369 states and 500 transitions. [2025-03-08 22:48:18,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 22:48:18,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-03-08 22:48:18,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:18,625 INFO L225 Difference]: With dead ends: 369 [2025-03-08 22:48:18,625 INFO L226 Difference]: Without dead ends: 365 [2025-03-08 22:48:18,625 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 22:48:18,626 INFO L435 NwaCegarLoop]: 122 mSDtfsCounter, 78 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:18,627 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 217 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:48:18,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2025-03-08 22:48:18,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 304. [2025-03-08 22:48:18,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 232 states have (on average 1.7974137931034482) internal successors, (417), 291 states have internal predecessors, (417), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 22:48:18,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 437 transitions. [2025-03-08 22:48:18,635 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 437 transitions. Word has length 10 [2025-03-08 22:48:18,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:18,635 INFO L471 AbstractCegarLoop]: Abstraction has 304 states and 437 transitions. [2025-03-08 22:48:18,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:18,635 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 437 transitions. [2025-03-08 22:48:18,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-08 22:48:18,636 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:18,636 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:48:18,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-08 22:48:18,636 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:18,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:18,637 INFO L85 PathProgramCache]: Analyzing trace with hash 2081074811, now seen corresponding path program 1 times [2025-03-08 22:48:18,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:18,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638212283] [2025-03-08 22:48:18,637 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:18,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:18,640 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-08 22:48:18,642 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-08 22:48:18,642 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:18,642 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:18,717 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 22:48:18,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:18,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638212283] [2025-03-08 22:48:18,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638212283] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:18,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:18,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 22:48:18,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307501661] [2025-03-08 22:48:18,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:18,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 22:48:18,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:18,718 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 22:48:18,718 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-08 22:48:18,718 INFO L87 Difference]: Start difference. First operand 304 states and 437 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:18,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:18,845 INFO L93 Difference]: Finished difference Result 389 states and 519 transitions. [2025-03-08 22:48:18,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 22:48:18,845 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-03-08 22:48:18,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:18,846 INFO L225 Difference]: With dead ends: 389 [2025-03-08 22:48:18,846 INFO L226 Difference]: Without dead ends: 384 [2025-03-08 22:48:18,847 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-08 22:48:18,847 INFO L435 NwaCegarLoop]: 142 mSDtfsCounter, 113 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:18,847 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 672 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:48:18,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2025-03-08 22:48:18,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 299. [2025-03-08 22:48:18,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 227 states have (on average 1.8105726872246697) internal successors, (411), 286 states have internal predecessors, (411), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 22:48:18,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 431 transitions. [2025-03-08 22:48:18,855 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 431 transitions. Word has length 10 [2025-03-08 22:48:18,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:18,855 INFO L471 AbstractCegarLoop]: Abstraction has 299 states and 431 transitions. [2025-03-08 22:48:18,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:48:18,855 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 431 transitions. [2025-03-08 22:48:18,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-08 22:48:18,856 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:18,856 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:48:18,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-08 22:48:18,856 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:18,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:18,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1871009068, now seen corresponding path program 1 times [2025-03-08 22:48:18,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:18,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974581313] [2025-03-08 22:48:18,857 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:18,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:18,863 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-08 22:48:18,864 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-08 22:48:18,865 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:18,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:18,914 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 22:48:18,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:18,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974581313] [2025-03-08 22:48:18,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974581313] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:18,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:18,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 22:48:18,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114132104] [2025-03-08 22:48:18,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:18,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 22:48:18,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:18,916 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 22:48:18,916 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 22:48:18,916 INFO L87 Difference]: Start difference. First operand 299 states and 431 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:19,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:19,060 INFO L93 Difference]: Finished difference Result 394 states and 526 transitions. [2025-03-08 22:48:19,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 22:48:19,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2025-03-08 22:48:19,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:19,061 INFO L225 Difference]: With dead ends: 394 [2025-03-08 22:48:19,061 INFO L226 Difference]: Without dead ends: 394 [2025-03-08 22:48:19,062 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:48:19,062 INFO L435 NwaCegarLoop]: 99 mSDtfsCounter, 162 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:19,062 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 276 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:48:19,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2025-03-08 22:48:19,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 299. [2025-03-08 22:48:19,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 227 states have (on average 1.7841409691629957) internal successors, (405), 286 states have internal predecessors, (405), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 22:48:19,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 425 transitions. [2025-03-08 22:48:19,068 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 425 transitions. Word has length 13 [2025-03-08 22:48:19,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:19,068 INFO L471 AbstractCegarLoop]: Abstraction has 299 states and 425 transitions. [2025-03-08 22:48:19,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:19,068 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 425 transitions. [2025-03-08 22:48:19,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-08 22:48:19,068 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:19,069 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:48:19,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-08 22:48:19,069 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr56REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:19,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:19,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1871009067, now seen corresponding path program 1 times [2025-03-08 22:48:19,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:19,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736750053] [2025-03-08 22:48:19,073 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:19,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:19,077 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-08 22:48:19,079 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-08 22:48:19,079 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:19,079 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:19,162 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 22:48:19,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:19,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736750053] [2025-03-08 22:48:19,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736750053] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:19,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:19,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 22:48:19,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239135969] [2025-03-08 22:48:19,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:19,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 22:48:19,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:19,164 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 22:48:19,164 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-08 22:48:19,164 INFO L87 Difference]: Start difference. First operand 299 states and 425 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:19,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:19,319 INFO L93 Difference]: Finished difference Result 367 states and 470 transitions. [2025-03-08 22:48:19,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 22:48:19,319 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2025-03-08 22:48:19,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:19,321 INFO L225 Difference]: With dead ends: 367 [2025-03-08 22:48:19,321 INFO L226 Difference]: Without dead ends: 367 [2025-03-08 22:48:19,321 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-08 22:48:19,321 INFO L435 NwaCegarLoop]: 143 mSDtfsCounter, 107 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:19,321 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 571 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:48:19,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2025-03-08 22:48:19,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 309. [2025-03-08 22:48:19,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 234 states have (on average 1.764957264957265) internal successors, (413), 294 states have internal predecessors, (413), 10 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (16), 9 states have call predecessors, (16), 10 states have call successors, (16) [2025-03-08 22:48:19,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 439 transitions. [2025-03-08 22:48:19,336 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 439 transitions. Word has length 13 [2025-03-08 22:48:19,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:19,336 INFO L471 AbstractCegarLoop]: Abstraction has 309 states and 439 transitions. [2025-03-08 22:48:19,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:19,336 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 439 transitions. [2025-03-08 22:48:19,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-08 22:48:19,337 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:19,337 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:48:19,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-08 22:48:19,337 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr56REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:19,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:19,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1870085546, now seen corresponding path program 1 times [2025-03-08 22:48:19,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:19,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689081837] [2025-03-08 22:48:19,338 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:19,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:19,341 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-08 22:48:19,343 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-08 22:48:19,343 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:19,343 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:19,426 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 22:48:19,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:19,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689081837] [2025-03-08 22:48:19,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689081837] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:19,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:19,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 22:48:19,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398210509] [2025-03-08 22:48:19,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:19,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 22:48:19,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:19,427 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 22:48:19,427 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-08 22:48:19,427 INFO L87 Difference]: Start difference. First operand 309 states and 439 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:19,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:19,580 INFO L93 Difference]: Finished difference Result 366 states and 468 transitions. [2025-03-08 22:48:19,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 22:48:19,581 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2025-03-08 22:48:19,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:19,582 INFO L225 Difference]: With dead ends: 366 [2025-03-08 22:48:19,582 INFO L226 Difference]: Without dead ends: 366 [2025-03-08 22:48:19,582 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-08 22:48:19,583 INFO L435 NwaCegarLoop]: 148 mSDtfsCounter, 102 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:19,583 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 586 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:48:19,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2025-03-08 22:48:19,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 303. [2025-03-08 22:48:19,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 231 states have (on average 1.774891774891775) internal successors, (410), 288 states have internal predecessors, (410), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 22:48:19,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 430 transitions. [2025-03-08 22:48:19,594 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 430 transitions. Word has length 13 [2025-03-08 22:48:19,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:19,594 INFO L471 AbstractCegarLoop]: Abstraction has 303 states and 430 transitions. [2025-03-08 22:48:19,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:19,594 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 430 transitions. [2025-03-08 22:48:19,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-08 22:48:19,595 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:19,595 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:48:19,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-08 22:48:19,595 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:19,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:19,596 INFO L85 PathProgramCache]: Analyzing trace with hash 113637169, now seen corresponding path program 1 times [2025-03-08 22:48:19,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:19,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774812334] [2025-03-08 22:48:19,596 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:19,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:19,601 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 22:48:19,602 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 22:48:19,602 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:19,602 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:19,642 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 22:48:19,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:19,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774812334] [2025-03-08 22:48:19,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774812334] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:19,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:19,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 22:48:19,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894683274] [2025-03-08 22:48:19,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:19,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 22:48:19,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:19,642 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 22:48:19,643 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 22:48:19,643 INFO L87 Difference]: Start difference. First operand 303 states and 430 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:19,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:19,774 INFO L93 Difference]: Finished difference Result 394 states and 524 transitions. [2025-03-08 22:48:19,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 22:48:19,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2025-03-08 22:48:19,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:19,777 INFO L225 Difference]: With dead ends: 394 [2025-03-08 22:48:19,777 INFO L226 Difference]: Without dead ends: 394 [2025-03-08 22:48:19,777 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:48:19,777 INFO L435 NwaCegarLoop]: 104 mSDtfsCounter, 133 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:19,777 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 283 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:48:19,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2025-03-08 22:48:19,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 309. [2025-03-08 22:48:19,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 237 states have (on average 1.7552742616033756) internal successors, (416), 294 states have internal predecessors, (416), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 22:48:19,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 436 transitions. [2025-03-08 22:48:19,784 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 436 transitions. Word has length 15 [2025-03-08 22:48:19,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:19,784 INFO L471 AbstractCegarLoop]: Abstraction has 309 states and 436 transitions. [2025-03-08 22:48:19,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:19,785 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 436 transitions. [2025-03-08 22:48:19,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-08 22:48:19,785 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:19,785 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:48:19,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-08 22:48:19,785 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:19,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:19,786 INFO L85 PathProgramCache]: Analyzing trace with hash 113637170, now seen corresponding path program 1 times [2025-03-08 22:48:19,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:19,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909490038] [2025-03-08 22:48:19,786 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:19,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:19,789 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 22:48:19,791 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 22:48:19,791 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:19,791 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:19,843 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 22:48:19,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:19,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909490038] [2025-03-08 22:48:19,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909490038] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:19,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:19,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 22:48:19,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382724016] [2025-03-08 22:48:19,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:19,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 22:48:19,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:19,844 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 22:48:19,844 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 22:48:19,845 INFO L87 Difference]: Start difference. First operand 309 states and 436 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:19,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:19,962 INFO L93 Difference]: Finished difference Result 357 states and 447 transitions. [2025-03-08 22:48:19,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 22:48:19,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2025-03-08 22:48:19,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:19,964 INFO L225 Difference]: With dead ends: 357 [2025-03-08 22:48:19,964 INFO L226 Difference]: Without dead ends: 357 [2025-03-08 22:48:19,964 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:48:19,965 INFO L435 NwaCegarLoop]: 144 mSDtfsCounter, 104 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:19,965 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 356 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:48:19,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2025-03-08 22:48:19,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 309. [2025-03-08 22:48:19,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 237 states have (on average 1.7172995780590716) internal successors, (407), 294 states have internal predecessors, (407), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 22:48:19,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 427 transitions. [2025-03-08 22:48:19,970 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 427 transitions. Word has length 15 [2025-03-08 22:48:19,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:19,970 INFO L471 AbstractCegarLoop]: Abstraction has 309 states and 427 transitions. [2025-03-08 22:48:19,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:19,970 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 427 transitions. [2025-03-08 22:48:19,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-08 22:48:19,971 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:19,971 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:48:19,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-08 22:48:19,971 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:19,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:19,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1443654893, now seen corresponding path program 1 times [2025-03-08 22:48:19,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:19,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647854621] [2025-03-08 22:48:19,971 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:19,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:19,976 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 22:48:19,978 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 22:48:19,978 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:19,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:20,000 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 22:48:20,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:20,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647854621] [2025-03-08 22:48:20,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647854621] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:20,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:20,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 22:48:20,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516351467] [2025-03-08 22:48:20,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:20,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 22:48:20,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:20,002 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 22:48:20,002 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 22:48:20,002 INFO L87 Difference]: Start difference. First operand 309 states and 427 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:20,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:20,069 INFO L93 Difference]: Finished difference Result 306 states and 421 transitions. [2025-03-08 22:48:20,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 22:48:20,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2025-03-08 22:48:20,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:20,071 INFO L225 Difference]: With dead ends: 306 [2025-03-08 22:48:20,071 INFO L226 Difference]: Without dead ends: 306 [2025-03-08 22:48:20,071 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 22:48:20,072 INFO L435 NwaCegarLoop]: 143 mSDtfsCounter, 6 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:20,072 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 228 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:48:20,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2025-03-08 22:48:20,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2025-03-08 22:48:20,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 237 states have (on average 1.6919831223628692) internal successors, (401), 291 states have internal predecessors, (401), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 22:48:20,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 421 transitions. [2025-03-08 22:48:20,078 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 421 transitions. Word has length 19 [2025-03-08 22:48:20,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:20,078 INFO L471 AbstractCegarLoop]: Abstraction has 306 states and 421 transitions. [2025-03-08 22:48:20,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:20,078 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 421 transitions. [2025-03-08 22:48:20,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-08 22:48:20,078 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:20,079 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:48:20,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-03-08 22:48:20,079 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:20,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:20,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1443654894, now seen corresponding path program 1 times [2025-03-08 22:48:20,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:20,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194654950] [2025-03-08 22:48:20,079 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:20,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:20,084 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 22:48:20,088 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 22:48:20,088 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:20,088 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:20,133 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 22:48:20,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:20,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194654950] [2025-03-08 22:48:20,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194654950] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:20,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:20,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 22:48:20,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694502048] [2025-03-08 22:48:20,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:20,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 22:48:20,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:20,135 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 22:48:20,135 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 22:48:20,135 INFO L87 Difference]: Start difference. First operand 306 states and 421 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:20,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:20,189 INFO L93 Difference]: Finished difference Result 309 states and 423 transitions. [2025-03-08 22:48:20,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 22:48:20,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2025-03-08 22:48:20,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:20,191 INFO L225 Difference]: With dead ends: 309 [2025-03-08 22:48:20,191 INFO L226 Difference]: Without dead ends: 309 [2025-03-08 22:48:20,191 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 22:48:20,191 INFO L435 NwaCegarLoop]: 143 mSDtfsCounter, 8 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:20,191 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 242 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 22:48:20,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2025-03-08 22:48:20,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2025-03-08 22:48:20,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 241 states have (on average 1.6721991701244814) internal successors, (403), 294 states have internal predecessors, (403), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 22:48:20,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 423 transitions. [2025-03-08 22:48:20,197 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 423 transitions. Word has length 19 [2025-03-08 22:48:20,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:20,197 INFO L471 AbstractCegarLoop]: Abstraction has 309 states and 423 transitions. [2025-03-08 22:48:20,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:20,198 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 423 transitions. [2025-03-08 22:48:20,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-03-08 22:48:20,198 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:20,198 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] [2025-03-08 22:48:20,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-08 22:48:20,198 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:20,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:20,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1803628828, now seen corresponding path program 1 times [2025-03-08 22:48:20,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:20,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140369708] [2025-03-08 22:48:20,199 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:20,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:20,206 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-08 22:48:20,210 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 22:48:20,210 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:20,210 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:20,262 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 22:48:20,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:20,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140369708] [2025-03-08 22:48:20,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140369708] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:20,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:20,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 22:48:20,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406913021] [2025-03-08 22:48:20,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:20,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 22:48:20,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:20,264 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 22:48:20,264 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:48:20,264 INFO L87 Difference]: Start difference. First operand 309 states and 423 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:20,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:20,290 INFO L93 Difference]: Finished difference Result 315 states and 429 transitions. [2025-03-08 22:48:20,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 22:48:20,291 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2025-03-08 22:48:20,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:20,292 INFO L225 Difference]: With dead ends: 315 [2025-03-08 22:48:20,292 INFO L226 Difference]: Without dead ends: 315 [2025-03-08 22:48:20,292 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:48:20,292 INFO L435 NwaCegarLoop]: 143 mSDtfsCounter, 11 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:20,293 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 417 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 22:48:20,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2025-03-08 22:48:20,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 311. [2025-03-08 22:48:20,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 243 states have (on average 1.6666666666666667) internal successors, (405), 296 states have internal predecessors, (405), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 22:48:20,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 425 transitions. [2025-03-08 22:48:20,299 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 425 transitions. Word has length 20 [2025-03-08 22:48:20,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:20,299 INFO L471 AbstractCegarLoop]: Abstraction has 311 states and 425 transitions. [2025-03-08 22:48:20,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:20,300 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 425 transitions. [2025-03-08 22:48:20,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-03-08 22:48:20,300 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:20,300 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] [2025-03-08 22:48:20,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-03-08 22:48:20,300 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:20,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:20,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1803690428, now seen corresponding path program 1 times [2025-03-08 22:48:20,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:20,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247066310] [2025-03-08 22:48:20,301 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:20,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:20,306 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-08 22:48:20,309 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 22:48:20,309 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:20,309 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:20,362 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 22:48:20,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:20,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247066310] [2025-03-08 22:48:20,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247066310] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:20,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:20,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-08 22:48:20,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401443723] [2025-03-08 22:48:20,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:20,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 22:48:20,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:20,363 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 22:48:20,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-08 22:48:20,363 INFO L87 Difference]: Start difference. First operand 311 states and 425 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:20,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:20,410 INFO L93 Difference]: Finished difference Result 361 states and 489 transitions. [2025-03-08 22:48:20,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 22:48:20,411 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2025-03-08 22:48:20,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:20,412 INFO L225 Difference]: With dead ends: 361 [2025-03-08 22:48:20,412 INFO L226 Difference]: Without dead ends: 361 [2025-03-08 22:48:20,412 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2025-03-08 22:48:20,412 INFO L435 NwaCegarLoop]: 142 mSDtfsCounter, 31 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:20,412 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 844 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 22:48:20,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2025-03-08 22:48:20,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 337. [2025-03-08 22:48:20,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 264 states have (on average 1.628787878787879) internal successors, (430), 318 states have internal predecessors, (430), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2025-03-08 22:48:20,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 460 transitions. [2025-03-08 22:48:20,424 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 460 transitions. Word has length 20 [2025-03-08 22:48:20,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:20,424 INFO L471 AbstractCegarLoop]: Abstraction has 337 states and 460 transitions. [2025-03-08 22:48:20,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:20,424 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 460 transitions. [2025-03-08 22:48:20,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-03-08 22:48:20,424 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:20,424 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] [2025-03-08 22:48:20,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-03-08 22:48:20,425 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:20,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:20,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1932773147, now seen corresponding path program 1 times [2025-03-08 22:48:20,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:20,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369536180] [2025-03-08 22:48:20,426 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:20,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:20,432 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-08 22:48:20,436 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 22:48:20,436 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:20,436 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:20,498 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 22:48:20,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:20,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369536180] [2025-03-08 22:48:20,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369536180] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:20,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:20,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 22:48:20,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993256087] [2025-03-08 22:48:20,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:20,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 22:48:20,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:20,499 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 22:48:20,499 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 22:48:20,500 INFO L87 Difference]: Start difference. First operand 337 states and 460 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:20,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:20,583 INFO L93 Difference]: Finished difference Result 341 states and 464 transitions. [2025-03-08 22:48:20,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 22:48:20,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2025-03-08 22:48:20,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:20,584 INFO L225 Difference]: With dead ends: 341 [2025-03-08 22:48:20,584 INFO L226 Difference]: Without dead ends: 341 [2025-03-08 22:48:20,585 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 22:48:20,585 INFO L435 NwaCegarLoop]: 144 mSDtfsCounter, 6 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:20,585 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 339 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:48:20,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2025-03-08 22:48:20,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 341. [2025-03-08 22:48:20,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 268 states have (on average 1.6194029850746268) internal successors, (434), 322 states have internal predecessors, (434), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2025-03-08 22:48:20,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 464 transitions. [2025-03-08 22:48:20,592 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 464 transitions. Word has length 20 [2025-03-08 22:48:20,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:20,593 INFO L471 AbstractCegarLoop]: Abstraction has 341 states and 464 transitions. [2025-03-08 22:48:20,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:20,593 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 464 transitions. [2025-03-08 22:48:20,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-03-08 22:48:20,593 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:20,593 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] [2025-03-08 22:48:20,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-03-08 22:48:20,594 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:20,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:20,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1932774108, now seen corresponding path program 1 times [2025-03-08 22:48:20,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:20,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476451632] [2025-03-08 22:48:20,594 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:20,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:20,601 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-08 22:48:20,603 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 22:48:20,603 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:20,603 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:20,649 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 22:48:20,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:20,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476451632] [2025-03-08 22:48:20,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476451632] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:20,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:20,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-08 22:48:20,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143311836] [2025-03-08 22:48:20,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:20,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 22:48:20,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:20,651 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 22:48:20,651 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-08 22:48:20,651 INFO L87 Difference]: Start difference. First operand 341 states and 464 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:20,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:20,702 INFO L93 Difference]: Finished difference Result 374 states and 503 transitions. [2025-03-08 22:48:20,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 22:48:20,702 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2025-03-08 22:48:20,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:20,703 INFO L225 Difference]: With dead ends: 374 [2025-03-08 22:48:20,703 INFO L226 Difference]: Without dead ends: 374 [2025-03-08 22:48:20,704 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-03-08 22:48:20,704 INFO L435 NwaCegarLoop]: 165 mSDtfsCounter, 45 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:20,704 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 946 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 22:48:20,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2025-03-08 22:48:20,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 336. [2025-03-08 22:48:20,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 264 states have (on average 1.6136363636363635) internal successors, (426), 317 states have internal predecessors, (426), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2025-03-08 22:48:20,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 456 transitions. [2025-03-08 22:48:20,712 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 456 transitions. Word has length 20 [2025-03-08 22:48:20,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:20,712 INFO L471 AbstractCegarLoop]: Abstraction has 336 states and 456 transitions. [2025-03-08 22:48:20,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:20,712 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 456 transitions. [2025-03-08 22:48:20,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-03-08 22:48:20,713 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:20,713 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] [2025-03-08 22:48:20,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-03-08 22:48:20,713 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:20,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:20,714 INFO L85 PathProgramCache]: Analyzing trace with hash -213574513, now seen corresponding path program 1 times [2025-03-08 22:48:20,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:20,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613883405] [2025-03-08 22:48:20,714 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:20,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:20,720 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-08 22:48:20,723 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 22:48:20,723 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:20,724 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:20,785 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 22:48:20,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:20,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613883405] [2025-03-08 22:48:20,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613883405] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:20,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:20,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 22:48:20,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865467876] [2025-03-08 22:48:20,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:20,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 22:48:20,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:20,787 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 22:48:20,787 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 22:48:20,787 INFO L87 Difference]: Start difference. First operand 336 states and 456 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:20,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:20,865 INFO L93 Difference]: Finished difference Result 339 states and 458 transitions. [2025-03-08 22:48:20,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 22:48:20,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2025-03-08 22:48:20,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:20,866 INFO L225 Difference]: With dead ends: 339 [2025-03-08 22:48:20,866 INFO L226 Difference]: Without dead ends: 339 [2025-03-08 22:48:20,867 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 22:48:20,867 INFO L435 NwaCegarLoop]: 143 mSDtfsCounter, 7 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:20,867 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 337 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:48:20,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2025-03-08 22:48:20,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 329. [2025-03-08 22:48:20,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 258 states have (on average 1.62015503875969) internal successors, (418), 310 states have internal predecessors, (418), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2025-03-08 22:48:20,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 448 transitions. [2025-03-08 22:48:20,875 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 448 transitions. Word has length 21 [2025-03-08 22:48:20,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:20,875 INFO L471 AbstractCegarLoop]: Abstraction has 329 states and 448 transitions. [2025-03-08 22:48:20,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:20,875 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 448 transitions. [2025-03-08 22:48:20,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-03-08 22:48:20,876 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:20,877 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] [2025-03-08 22:48:20,877 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-03-08 22:48:20,877 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:20,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:20,877 INFO L85 PathProgramCache]: Analyzing trace with hash -815192534, now seen corresponding path program 1 times [2025-03-08 22:48:20,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:20,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469922116] [2025-03-08 22:48:20,877 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:20,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:20,883 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-08 22:48:20,889 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 22:48:20,889 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:20,889 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:21,057 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 22:48:21,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:21,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469922116] [2025-03-08 22:48:21,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469922116] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:21,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:21,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-08 22:48:21,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231442692] [2025-03-08 22:48:21,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:21,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 22:48:21,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:21,058 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 22:48:21,059 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-03-08 22:48:21,059 INFO L87 Difference]: Start difference. First operand 329 states and 448 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:21,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:21,280 INFO L93 Difference]: Finished difference Result 400 states and 507 transitions. [2025-03-08 22:48:21,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 22:48:21,280 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2025-03-08 22:48:21,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:21,281 INFO L225 Difference]: With dead ends: 400 [2025-03-08 22:48:21,281 INFO L226 Difference]: Without dead ends: 400 [2025-03-08 22:48:21,282 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2025-03-08 22:48:21,282 INFO L435 NwaCegarLoop]: 135 mSDtfsCounter, 99 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:21,282 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 879 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:48:21,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2025-03-08 22:48:21,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 323. [2025-03-08 22:48:21,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 252 states have (on average 1.6150793650793651) internal successors, (407), 304 states have internal predecessors, (407), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2025-03-08 22:48:21,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 437 transitions. [2025-03-08 22:48:21,288 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 437 transitions. Word has length 21 [2025-03-08 22:48:21,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:21,288 INFO L471 AbstractCegarLoop]: Abstraction has 323 states and 437 transitions. [2025-03-08 22:48:21,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:21,288 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 437 transitions. [2025-03-08 22:48:21,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-08 22:48:21,288 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:21,288 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] [2025-03-08 22:48:21,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-03-08 22:48:21,289 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:21,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:21,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1715206074, now seen corresponding path program 1 times [2025-03-08 22:48:21,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:21,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173102810] [2025-03-08 22:48:21,289 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:21,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:21,293 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 22:48:21,295 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 22:48:21,295 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:21,295 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:21,325 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 22:48:21,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:21,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173102810] [2025-03-08 22:48:21,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173102810] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:21,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:21,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 22:48:21,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293031437] [2025-03-08 22:48:21,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:21,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 22:48:21,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:21,326 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 22:48:21,326 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 22:48:21,327 INFO L87 Difference]: Start difference. First operand 323 states and 437 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:21,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:21,448 INFO L93 Difference]: Finished difference Result 397 states and 515 transitions. [2025-03-08 22:48:21,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 22:48:21,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2025-03-08 22:48:21,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:21,450 INFO L225 Difference]: With dead ends: 397 [2025-03-08 22:48:21,450 INFO L226 Difference]: Without dead ends: 397 [2025-03-08 22:48:21,450 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:48:21,450 INFO L435 NwaCegarLoop]: 109 mSDtfsCounter, 138 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:21,451 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 279 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:48:21,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2025-03-08 22:48:21,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 343. [2025-03-08 22:48:21,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 272 states have (on average 1.6433823529411764) internal successors, (447), 324 states have internal predecessors, (447), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2025-03-08 22:48:21,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 477 transitions. [2025-03-08 22:48:21,458 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 477 transitions. Word has length 23 [2025-03-08 22:48:21,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:21,458 INFO L471 AbstractCegarLoop]: Abstraction has 343 states and 477 transitions. [2025-03-08 22:48:21,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:21,458 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 477 transitions. [2025-03-08 22:48:21,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-08 22:48:21,459 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:21,459 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] [2025-03-08 22:48:21,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2025-03-08 22:48:21,459 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:21,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:21,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1715206073, now seen corresponding path program 1 times [2025-03-08 22:48:21,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:21,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393621288] [2025-03-08 22:48:21,459 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:21,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:21,463 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 22:48:21,466 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 22:48:21,466 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:21,466 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:21,573 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 22:48:21,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:21,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393621288] [2025-03-08 22:48:21,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393621288] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:21,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:21,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-08 22:48:21,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534437312] [2025-03-08 22:48:21,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:21,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 22:48:21,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:21,574 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 22:48:21,574 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-03-08 22:48:21,574 INFO L87 Difference]: Start difference. First operand 343 states and 477 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:21,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:21,692 INFO L93 Difference]: Finished difference Result 261 states and 322 transitions. [2025-03-08 22:48:21,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 22:48:21,692 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2025-03-08 22:48:21,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:21,693 INFO L225 Difference]: With dead ends: 261 [2025-03-08 22:48:21,695 INFO L226 Difference]: Without dead ends: 261 [2025-03-08 22:48:21,695 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-03-08 22:48:21,696 INFO L435 NwaCegarLoop]: 136 mSDtfsCounter, 46 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:21,696 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 917 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:48:21,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2025-03-08 22:48:21,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 239. [2025-03-08 22:48:21,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 176 states have (on average 1.5909090909090908) internal successors, (280), 226 states have internal predecessors, (280), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2025-03-08 22:48:21,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 298 transitions. [2025-03-08 22:48:21,701 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 298 transitions. Word has length 23 [2025-03-08 22:48:21,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:21,701 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 298 transitions. [2025-03-08 22:48:21,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:21,701 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 298 transitions. [2025-03-08 22:48:21,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-08 22:48:21,701 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:21,702 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] [2025-03-08 22:48:21,702 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2025-03-08 22:48:21,702 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:21,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:21,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1999411383, now seen corresponding path program 1 times [2025-03-08 22:48:21,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:21,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822092391] [2025-03-08 22:48:21,702 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:21,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:21,709 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-08 22:48:21,713 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 22:48:21,713 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:21,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:21,870 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 22:48:21,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:21,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822092391] [2025-03-08 22:48:21,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822092391] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:21,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:21,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-08 22:48:21,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439074397] [2025-03-08 22:48:21,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:21,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 22:48:21,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:21,872 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 22:48:21,872 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-03-08 22:48:21,872 INFO L87 Difference]: Start difference. First operand 239 states and 298 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:22,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:22,015 INFO L93 Difference]: Finished difference Result 270 states and 332 transitions. [2025-03-08 22:48:22,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 22:48:22,015 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2025-03-08 22:48:22,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:22,016 INFO L225 Difference]: With dead ends: 270 [2025-03-08 22:48:22,016 INFO L226 Difference]: Without dead ends: 270 [2025-03-08 22:48:22,016 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-03-08 22:48:22,017 INFO L435 NwaCegarLoop]: 137 mSDtfsCounter, 72 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:22,017 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 893 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:48:22,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2025-03-08 22:48:22,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 249. [2025-03-08 22:48:22,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 186 states have (on average 1.5591397849462365) internal successors, (290), 236 states have internal predecessors, (290), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2025-03-08 22:48:22,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 308 transitions. [2025-03-08 22:48:22,021 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 308 transitions. Word has length 24 [2025-03-08 22:48:22,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:22,021 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 308 transitions. [2025-03-08 22:48:22,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:22,022 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 308 transitions. [2025-03-08 22:48:22,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-08 22:48:22,022 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:22,022 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] [2025-03-08 22:48:22,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2025-03-08 22:48:22,022 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:22,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:22,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1488877206, now seen corresponding path program 1 times [2025-03-08 22:48:22,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:22,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484412131] [2025-03-08 22:48:22,023 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:22,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:22,029 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-08 22:48:22,032 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 22:48:22,033 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:22,033 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:22,083 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 22:48:22,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:22,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484412131] [2025-03-08 22:48:22,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484412131] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:22,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:22,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-08 22:48:22,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755530217] [2025-03-08 22:48:22,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:22,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 22:48:22,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:22,085 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 22:48:22,085 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-08 22:48:22,085 INFO L87 Difference]: Start difference. First operand 249 states and 308 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:22,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:22,129 INFO L93 Difference]: Finished difference Result 273 states and 335 transitions. [2025-03-08 22:48:22,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 22:48:22,130 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2025-03-08 22:48:22,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:22,131 INFO L225 Difference]: With dead ends: 273 [2025-03-08 22:48:22,131 INFO L226 Difference]: Without dead ends: 273 [2025-03-08 22:48:22,131 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2025-03-08 22:48:22,132 INFO L435 NwaCegarLoop]: 160 mSDtfsCounter, 20 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:22,132 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 922 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 22:48:22,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2025-03-08 22:48:22,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 249. [2025-03-08 22:48:22,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 186 states have (on average 1.5483870967741935) internal successors, (288), 236 states have internal predecessors, (288), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2025-03-08 22:48:22,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 306 transitions. [2025-03-08 22:48:22,138 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 306 transitions. Word has length 24 [2025-03-08 22:48:22,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:22,138 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 306 transitions. [2025-03-08 22:48:22,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:22,138 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 306 transitions. [2025-03-08 22:48:22,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-08 22:48:22,138 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:22,138 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] [2025-03-08 22:48:22,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2025-03-08 22:48:22,139 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:22,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:22,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1532465834, now seen corresponding path program 1 times [2025-03-08 22:48:22,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:22,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820025254] [2025-03-08 22:48:22,139 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:22,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:22,152 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-08 22:48:22,156 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 22:48:22,157 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:22,157 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:22,310 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 22:48:22,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:22,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820025254] [2025-03-08 22:48:22,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820025254] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:22,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:22,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-08 22:48:22,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162877371] [2025-03-08 22:48:22,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:22,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 22:48:22,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:22,312 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 22:48:22,312 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-03-08 22:48:22,312 INFO L87 Difference]: Start difference. First operand 249 states and 306 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:22,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:22,459 INFO L93 Difference]: Finished difference Result 267 states and 325 transitions. [2025-03-08 22:48:22,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 22:48:22,460 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2025-03-08 22:48:22,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:22,461 INFO L225 Difference]: With dead ends: 267 [2025-03-08 22:48:22,461 INFO L226 Difference]: Without dead ends: 267 [2025-03-08 22:48:22,461 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-03-08 22:48:22,461 INFO L435 NwaCegarLoop]: 152 mSDtfsCounter, 53 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:22,462 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 958 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:48:22,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2025-03-08 22:48:22,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 254. [2025-03-08 22:48:22,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 191 states have (on average 1.5340314136125655) internal successors, (293), 241 states have internal predecessors, (293), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2025-03-08 22:48:22,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 311 transitions. [2025-03-08 22:48:22,466 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 311 transitions. Word has length 25 [2025-03-08 22:48:22,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:22,466 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 311 transitions. [2025-03-08 22:48:22,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:22,466 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 311 transitions. [2025-03-08 22:48:22,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-08 22:48:22,466 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:22,466 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] [2025-03-08 22:48:22,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2025-03-08 22:48:22,467 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:22,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:22,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1583989523, now seen corresponding path program 1 times [2025-03-08 22:48:22,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:22,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735767504] [2025-03-08 22:48:22,467 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:22,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:22,474 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-08 22:48:22,480 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 22:48:22,480 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:22,480 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:22,626 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 22:48:22,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:22,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735767504] [2025-03-08 22:48:22,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735767504] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:22,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:22,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-08 22:48:22,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737881710] [2025-03-08 22:48:22,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:22,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 22:48:22,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:22,628 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 22:48:22,628 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-08 22:48:22,628 INFO L87 Difference]: Start difference. First operand 254 states and 311 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:22,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:22,841 INFO L93 Difference]: Finished difference Result 459 states and 567 transitions. [2025-03-08 22:48:22,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 22:48:22,842 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2025-03-08 22:48:22,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:22,843 INFO L225 Difference]: With dead ends: 459 [2025-03-08 22:48:22,843 INFO L226 Difference]: Without dead ends: 459 [2025-03-08 22:48:22,843 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2025-03-08 22:48:22,844 INFO L435 NwaCegarLoop]: 101 mSDtfsCounter, 171 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:22,844 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 574 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 22:48:22,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2025-03-08 22:48:22,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 390. [2025-03-08 22:48:22,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 319 states have (on average 1.5768025078369905) internal successors, (503), 371 states have internal predecessors, (503), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2025-03-08 22:48:22,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 533 transitions. [2025-03-08 22:48:22,854 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 533 transitions. Word has length 26 [2025-03-08 22:48:22,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:22,854 INFO L471 AbstractCegarLoop]: Abstraction has 390 states and 533 transitions. [2025-03-08 22:48:22,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:22,854 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 533 transitions. [2025-03-08 22:48:22,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-08 22:48:22,854 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:22,854 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] [2025-03-08 22:48:22,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2025-03-08 22:48:22,855 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:22,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:22,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1859035013, now seen corresponding path program 1 times [2025-03-08 22:48:22,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:22,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028726752] [2025-03-08 22:48:22,855 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:22,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:22,864 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-08 22:48:22,869 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 22:48:22,869 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:22,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:22,939 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 22:48:22,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:22,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028726752] [2025-03-08 22:48:22,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028726752] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:22,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:22,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 22:48:22,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022051579] [2025-03-08 22:48:22,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:22,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 22:48:22,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:22,942 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 22:48:22,942 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-08 22:48:22,942 INFO L87 Difference]: Start difference. First operand 390 states and 533 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:23,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:23,056 INFO L93 Difference]: Finished difference Result 419 states and 563 transitions. [2025-03-08 22:48:23,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 22:48:23,056 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2025-03-08 22:48:23,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:23,057 INFO L225 Difference]: With dead ends: 419 [2025-03-08 22:48:23,058 INFO L226 Difference]: Without dead ends: 419 [2025-03-08 22:48:23,059 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2025-03-08 22:48:23,059 INFO L435 NwaCegarLoop]: 129 mSDtfsCounter, 177 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:23,059 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 594 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:48:23,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2025-03-08 22:48:23,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 411. [2025-03-08 22:48:23,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 341 states have (on average 1.5513196480938416) internal successors, (529), 392 states have internal predecessors, (529), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2025-03-08 22:48:23,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 559 transitions. [2025-03-08 22:48:23,069 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 559 transitions. Word has length 27 [2025-03-08 22:48:23,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:23,069 INFO L471 AbstractCegarLoop]: Abstraction has 411 states and 559 transitions. [2025-03-08 22:48:23,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:23,070 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 559 transitions. [2025-03-08 22:48:23,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-08 22:48:23,070 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:23,070 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] [2025-03-08 22:48:23,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2025-03-08 22:48:23,071 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:23,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:23,071 INFO L85 PathProgramCache]: Analyzing trace with hash -474084282, now seen corresponding path program 1 times [2025-03-08 22:48:23,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:23,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230777663] [2025-03-08 22:48:23,071 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:23,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:23,079 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-08 22:48:23,085 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 22:48:23,087 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:23,087 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:23,339 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 22:48:23,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:23,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230777663] [2025-03-08 22:48:23,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230777663] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:23,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:23,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-08 22:48:23,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263508785] [2025-03-08 22:48:23,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:23,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 22:48:23,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:23,342 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 22:48:23,342 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2025-03-08 22:48:23,342 INFO L87 Difference]: Start difference. First operand 411 states and 559 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:23,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:23,791 INFO L93 Difference]: Finished difference Result 611 states and 809 transitions. [2025-03-08 22:48:23,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 22:48:23,792 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2025-03-08 22:48:23,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:23,794 INFO L225 Difference]: With dead ends: 611 [2025-03-08 22:48:23,794 INFO L226 Difference]: Without dead ends: 611 [2025-03-08 22:48:23,794 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2025-03-08 22:48:23,794 INFO L435 NwaCegarLoop]: 214 mSDtfsCounter, 152 mSDsluCounter, 1175 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:23,794 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 1389 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 22:48:23,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2025-03-08 22:48:23,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 543. [2025-03-08 22:48:23,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 465 states have (on average 1.5763440860215054) internal successors, (733), 518 states have internal predecessors, (733), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 17 states have call predecessors, (28), 14 states have call successors, (28) [2025-03-08 22:48:23,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 775 transitions. [2025-03-08 22:48:23,803 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 775 transitions. Word has length 27 [2025-03-08 22:48:23,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:23,803 INFO L471 AbstractCegarLoop]: Abstraction has 543 states and 775 transitions. [2025-03-08 22:48:23,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:23,803 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 775 transitions. [2025-03-08 22:48:23,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-08 22:48:23,804 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:23,804 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 22:48:23,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2025-03-08 22:48:23,804 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:23,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:23,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1811710798, now seen corresponding path program 1 times [2025-03-08 22:48:23,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:23,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601944490] [2025-03-08 22:48:23,804 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:23,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:23,811 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 22:48:23,815 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 22:48:23,815 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:23,815 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:23,880 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 22:48:23,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:23,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601944490] [2025-03-08 22:48:23,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601944490] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:23,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:23,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 22:48:23,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934574556] [2025-03-08 22:48:23,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:23,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 22:48:23,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:23,881 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 22:48:23,882 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-08 22:48:23,882 INFO L87 Difference]: Start difference. First operand 543 states and 775 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:24,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:24,014 INFO L93 Difference]: Finished difference Result 560 states and 788 transitions. [2025-03-08 22:48:24,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 22:48:24,015 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2025-03-08 22:48:24,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:24,017 INFO L225 Difference]: With dead ends: 560 [2025-03-08 22:48:24,017 INFO L226 Difference]: Without dead ends: 560 [2025-03-08 22:48:24,017 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2025-03-08 22:48:24,017 INFO L435 NwaCegarLoop]: 163 mSDtfsCounter, 154 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:24,018 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 719 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:48:24,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2025-03-08 22:48:24,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 552. [2025-03-08 22:48:24,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 475 states have (on average 1.5621052631578947) internal successors, (742), 527 states have internal predecessors, (742), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 17 states have call predecessors, (28), 14 states have call successors, (28) [2025-03-08 22:48:24,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 784 transitions. [2025-03-08 22:48:24,027 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 784 transitions. Word has length 28 [2025-03-08 22:48:24,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:24,027 INFO L471 AbstractCegarLoop]: Abstraction has 552 states and 784 transitions. [2025-03-08 22:48:24,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:24,027 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 784 transitions. [2025-03-08 22:48:24,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-08 22:48:24,027 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:24,028 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] [2025-03-08 22:48:24,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2025-03-08 22:48:24,028 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:24,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:24,028 INFO L85 PathProgramCache]: Analyzing trace with hash -173745890, now seen corresponding path program 1 times [2025-03-08 22:48:24,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:24,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911796938] [2025-03-08 22:48:24,028 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:24,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:24,035 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-08 22:48:24,039 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 22:48:24,039 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:24,039 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:24,149 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 22:48:24,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:24,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911796938] [2025-03-08 22:48:24,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911796938] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:24,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:24,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-08 22:48:24,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640092067] [2025-03-08 22:48:24,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:24,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 22:48:24,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:24,150 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 22:48:24,150 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-08 22:48:24,150 INFO L87 Difference]: Start difference. First operand 552 states and 784 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:24,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:24,346 INFO L93 Difference]: Finished difference Result 551 states and 764 transitions. [2025-03-08 22:48:24,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 22:48:24,347 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2025-03-08 22:48:24,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:24,348 INFO L225 Difference]: With dead ends: 551 [2025-03-08 22:48:24,348 INFO L226 Difference]: Without dead ends: 551 [2025-03-08 22:48:24,349 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2025-03-08 22:48:24,349 INFO L435 NwaCegarLoop]: 93 mSDtfsCounter, 163 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:24,349 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 383 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 22:48:24,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2025-03-08 22:48:24,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 513. [2025-03-08 22:48:24,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 443 states have (on average 1.5169300225733635) internal successors, (672), 488 states have internal predecessors, (672), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 17 states have call predecessors, (28), 14 states have call successors, (28) [2025-03-08 22:48:24,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 714 transitions. [2025-03-08 22:48:24,359 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 714 transitions. Word has length 29 [2025-03-08 22:48:24,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:24,359 INFO L471 AbstractCegarLoop]: Abstraction has 513 states and 714 transitions. [2025-03-08 22:48:24,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:24,360 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 714 transitions. [2025-03-08 22:48:24,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-03-08 22:48:24,360 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:24,360 INFO L218 NwaCegarLoop]: trace histogram [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] [2025-03-08 22:48:24,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2025-03-08 22:48:24,361 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr56REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:24,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:24,361 INFO L85 PathProgramCache]: Analyzing trace with hash -95964004, now seen corresponding path program 1 times [2025-03-08 22:48:24,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:24,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703205561] [2025-03-08 22:48:24,362 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:24,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:24,371 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-03-08 22:48:24,376 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-03-08 22:48:24,376 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:24,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 22:48:24,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:24,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703205561] [2025-03-08 22:48:24,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703205561] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:48:24,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117593683] [2025-03-08 22:48:24,530 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:24,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:24,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:48:24,533 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 22:48:24,534 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 22:48:24,602 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-03-08 22:48:24,627 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-03-08 22:48:24,627 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:24,627 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:24,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-08 22:48:24,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:48:24,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:48:24,885 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:48:25,022 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 22:48:25,022 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 19 treesize of output 23 [2025-03-08 22:48:25,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 22:48:25,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117593683] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 22:48:25,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 22:48:25,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 21 [2025-03-08 22:48:25,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634724807] [2025-03-08 22:48:25,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 22:48:25,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 22:48:25,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:25,172 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 22:48:25,172 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2025-03-08 22:48:25,172 INFO L87 Difference]: Start difference. First operand 513 states and 714 transitions. Second operand has 22 states, 21 states have (on average 4.904761904761905) internal successors, (103), 19 states have internal predecessors, (103), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 22:48:25,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:25,471 INFO L93 Difference]: Finished difference Result 540 states and 738 transitions. [2025-03-08 22:48:25,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 22:48:25,472 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.904761904761905) internal successors, (103), 19 states have internal predecessors, (103), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2025-03-08 22:48:25,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:25,473 INFO L225 Difference]: With dead ends: 540 [2025-03-08 22:48:25,473 INFO L226 Difference]: Without dead ends: 540 [2025-03-08 22:48:25,474 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2025-03-08 22:48:25,474 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 511 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:25,474 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 1005 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 22:48:25,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2025-03-08 22:48:25,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 402. [2025-03-08 22:48:25,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 341 states have (on average 1.466275659824047) internal successors, (500), 383 states have internal predecessors, (500), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2025-03-08 22:48:25,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 530 transitions. [2025-03-08 22:48:25,481 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 530 transitions. Word has length 40 [2025-03-08 22:48:25,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:25,481 INFO L471 AbstractCegarLoop]: Abstraction has 402 states and 530 transitions. [2025-03-08 22:48:25,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.904761904761905) internal successors, (103), 19 states have internal predecessors, (103), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 22:48:25,482 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 530 transitions. [2025-03-08 22:48:25,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-03-08 22:48:25,482 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:25,482 INFO L218 NwaCegarLoop]: trace histogram [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 22:48:25,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 22:48:25,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:25,686 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:25,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:25,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1696733252, now seen corresponding path program 1 times [2025-03-08 22:48:25,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:25,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123350611] [2025-03-08 22:48:25,686 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:25,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:25,698 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-03-08 22:48:25,703 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-03-08 22:48:25,703 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:25,703 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:48:25,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:25,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123350611] [2025-03-08 22:48:25,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123350611] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:48:25,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668601137] [2025-03-08 22:48:25,828 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:25,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:25,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:48:25,830 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 22:48:25,831 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 22:48:25,887 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-03-08 22:48:25,909 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-03-08 22:48:25,909 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:25,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:25,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-08 22:48:25,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:48:26,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:48:26,093 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:48:26,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668601137] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:26,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 22:48:26,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2025-03-08 22:48:26,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923667709] [2025-03-08 22:48:26,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:26,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 22:48:26,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:26,094 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 22:48:26,094 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2025-03-08 22:48:26,094 INFO L87 Difference]: Start difference. First operand 402 states and 530 transitions. Second operand has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:26,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:26,175 INFO L93 Difference]: Finished difference Result 409 states and 537 transitions. [2025-03-08 22:48:26,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 22:48:26,176 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2025-03-08 22:48:26,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:26,177 INFO L225 Difference]: With dead ends: 409 [2025-03-08 22:48:26,177 INFO L226 Difference]: Without dead ends: 409 [2025-03-08 22:48:26,177 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2025-03-08 22:48:26,177 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 252 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:26,178 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 257 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:48:26,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2025-03-08 22:48:26,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 404. [2025-03-08 22:48:26,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 343 states have (on average 1.466472303206997) internal successors, (503), 385 states have internal predecessors, (503), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2025-03-08 22:48:26,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 533 transitions. [2025-03-08 22:48:26,184 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 533 transitions. Word has length 40 [2025-03-08 22:48:26,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:26,184 INFO L471 AbstractCegarLoop]: Abstraction has 404 states and 533 transitions. [2025-03-08 22:48:26,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:26,184 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 533 transitions. [2025-03-08 22:48:26,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-03-08 22:48:26,185 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:26,185 INFO L218 NwaCegarLoop]: trace histogram [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 22:48:26,191 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 22:48:26,385 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,SelfDestructingSolverStorable31 [2025-03-08 22:48:26,385 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:26,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:26,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1696733283, now seen corresponding path program 1 times [2025-03-08 22:48:26,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:26,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681152739] [2025-03-08 22:48:26,386 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:26,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:26,392 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-03-08 22:48:26,396 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-03-08 22:48:26,396 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:26,396 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:48:26,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:26,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681152739] [2025-03-08 22:48:26,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681152739] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:48:26,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161648761] [2025-03-08 22:48:26,483 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:26,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:26,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:48:26,485 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 22:48:26,485 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 22:48:26,543 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-03-08 22:48:26,561 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-03-08 22:48:26,561 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:26,561 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:26,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-08 22:48:26,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:48:26,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:48:26,732 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:48:26,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161648761] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:26,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 22:48:26,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2025-03-08 22:48:26,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390495631] [2025-03-08 22:48:26,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:26,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 22:48:26,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:26,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 22:48:26,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2025-03-08 22:48:26,733 INFO L87 Difference]: Start difference. First operand 404 states and 533 transitions. Second operand has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:26,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:26,835 INFO L93 Difference]: Finished difference Result 408 states and 535 transitions. [2025-03-08 22:48:26,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 22:48:26,836 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2025-03-08 22:48:26,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:26,837 INFO L225 Difference]: With dead ends: 408 [2025-03-08 22:48:26,837 INFO L226 Difference]: Without dead ends: 408 [2025-03-08 22:48:26,837 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2025-03-08 22:48:26,837 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 246 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:26,838 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 331 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:48:26,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2025-03-08 22:48:26,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 401. [2025-03-08 22:48:26,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 341 states have (on average 1.4604105571847508) internal successors, (498), 382 states have internal predecessors, (498), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2025-03-08 22:48:26,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 528 transitions. [2025-03-08 22:48:26,844 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 528 transitions. Word has length 40 [2025-03-08 22:48:26,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:26,844 INFO L471 AbstractCegarLoop]: Abstraction has 401 states and 528 transitions. [2025-03-08 22:48:26,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:26,844 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 528 transitions. [2025-03-08 22:48:26,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-03-08 22:48:26,844 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:26,845 INFO L218 NwaCegarLoop]: trace histogram [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 22:48:26,851 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 22:48:27,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:27,048 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:27,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:27,049 INFO L85 PathProgramCache]: Analyzing trace with hash 829926201, now seen corresponding path program 1 times [2025-03-08 22:48:27,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:27,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921004277] [2025-03-08 22:48:27,049 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:27,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:27,056 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-08 22:48:27,060 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-08 22:48:27,061 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:27,061 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 22:48:27,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:27,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921004277] [2025-03-08 22:48:27,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921004277] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:27,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:27,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 22:48:27,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665398459] [2025-03-08 22:48:27,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:27,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 22:48:27,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:27,182 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 22:48:27,182 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-08 22:48:27,182 INFO L87 Difference]: Start difference. First operand 401 states and 528 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 22:48:27,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:27,289 INFO L93 Difference]: Finished difference Result 407 states and 528 transitions. [2025-03-08 22:48:27,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 22:48:27,289 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2025-03-08 22:48:27,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:27,290 INFO L225 Difference]: With dead ends: 407 [2025-03-08 22:48:27,290 INFO L226 Difference]: Without dead ends: 407 [2025-03-08 22:48:27,290 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2025-03-08 22:48:27,291 INFO L435 NwaCegarLoop]: 97 mSDtfsCounter, 135 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:27,291 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 329 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:48:27,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2025-03-08 22:48:27,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 399. [2025-03-08 22:48:27,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 341 states have (on average 1.436950146627566) internal successors, (490), 380 states have internal predecessors, (490), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2025-03-08 22:48:27,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 520 transitions. [2025-03-08 22:48:27,298 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 520 transitions. Word has length 42 [2025-03-08 22:48:27,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:27,298 INFO L471 AbstractCegarLoop]: Abstraction has 399 states and 520 transitions. [2025-03-08 22:48:27,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 22:48:27,298 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 520 transitions. [2025-03-08 22:48:27,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-08 22:48:27,299 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:27,299 INFO L218 NwaCegarLoop]: trace histogram [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] [2025-03-08 22:48:27,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2025-03-08 22:48:27,300 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:27,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:27,300 INFO L85 PathProgramCache]: Analyzing trace with hash -89837041, now seen corresponding path program 1 times [2025-03-08 22:48:27,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:27,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338417589] [2025-03-08 22:48:27,300 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:27,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:27,307 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-08 22:48:27,314 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-08 22:48:27,315 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:27,315 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:48:27,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:27,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338417589] [2025-03-08 22:48:27,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338417589] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:27,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:27,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2025-03-08 22:48:27,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352736490] [2025-03-08 22:48:27,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:27,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 22:48:27,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:27,868 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 22:48:27,868 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2025-03-08 22:48:27,868 INFO L87 Difference]: Start difference. First operand 399 states and 520 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:28,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:28,174 INFO L93 Difference]: Finished difference Result 417 states and 540 transitions. [2025-03-08 22:48:28,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 22:48:28,174 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2025-03-08 22:48:28,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:28,175 INFO L225 Difference]: With dead ends: 417 [2025-03-08 22:48:28,175 INFO L226 Difference]: Without dead ends: 417 [2025-03-08 22:48:28,175 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2025-03-08 22:48:28,176 INFO L435 NwaCegarLoop]: 112 mSDtfsCounter, 45 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:28,176 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 769 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 22:48:28,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2025-03-08 22:48:28,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 413. [2025-03-08 22:48:28,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 355 states have (on average 1.4253521126760564) internal successors, (506), 394 states have internal predecessors, (506), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2025-03-08 22:48:28,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 536 transitions. [2025-03-08 22:48:28,181 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 536 transitions. Word has length 43 [2025-03-08 22:48:28,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:28,181 INFO L471 AbstractCegarLoop]: Abstraction has 413 states and 536 transitions. [2025-03-08 22:48:28,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:28,181 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 536 transitions. [2025-03-08 22:48:28,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-08 22:48:28,182 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:28,182 INFO L218 NwaCegarLoop]: trace histogram [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 22:48:28,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2025-03-08 22:48:28,182 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:28,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:28,183 INFO L85 PathProgramCache]: Analyzing trace with hash -26258337, now seen corresponding path program 1 times [2025-03-08 22:48:28,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:28,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092281835] [2025-03-08 22:48:28,183 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:28,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:28,190 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-08 22:48:28,196 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-08 22:48:28,197 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:28,197 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:28,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:48:28,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:28,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092281835] [2025-03-08 22:48:28,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092281835] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:48:28,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:48:28,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2025-03-08 22:48:28,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067397746] [2025-03-08 22:48:28,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:48:28,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-08 22:48:28,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:48:28,744 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-08 22:48:28,744 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2025-03-08 22:48:28,745 INFO L87 Difference]: Start difference. First operand 413 states and 536 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:28,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:48:28,865 INFO L93 Difference]: Finished difference Result 417 states and 540 transitions. [2025-03-08 22:48:28,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 22:48:28,865 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2025-03-08 22:48:28,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:48:28,866 INFO L225 Difference]: With dead ends: 417 [2025-03-08 22:48:28,866 INFO L226 Difference]: Without dead ends: 417 [2025-03-08 22:48:28,866 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2025-03-08 22:48:28,867 INFO L435 NwaCegarLoop]: 114 mSDtfsCounter, 58 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:48:28,867 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 618 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:48:28,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2025-03-08 22:48:28,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 414. [2025-03-08 22:48:28,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 356 states have (on average 1.4241573033707866) internal successors, (507), 395 states have internal predecessors, (507), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2025-03-08 22:48:28,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 537 transitions. [2025-03-08 22:48:28,872 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 537 transitions. Word has length 44 [2025-03-08 22:48:28,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:48:28,872 INFO L471 AbstractCegarLoop]: Abstraction has 414 states and 537 transitions. [2025-03-08 22:48:28,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 22:48:28,872 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 537 transitions. [2025-03-08 22:48:28,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-08 22:48:28,873 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:48:28,873 INFO L218 NwaCegarLoop]: trace histogram [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 22:48:28,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2025-03-08 22:48:28,873 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 54 more)] === [2025-03-08 22:48:28,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:48:28,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1865784773, now seen corresponding path program 1 times [2025-03-08 22:48:28,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:48:28,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792444443] [2025-03-08 22:48:28,874 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:28,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:48:28,881 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-08 22:48:28,887 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-08 22:48:28,887 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:28,887 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:48:29,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:48:29,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792444443] [2025-03-08 22:48:29,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792444443] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:48:29,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030009327] [2025-03-08 22:48:29,689 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:48:29,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:48:29,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:48:29,691 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 22:48:29,692 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 22:48:29,762 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-08 22:48:29,786 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-08 22:48:29,786 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:48:29,787 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:48:29,788 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-08 22:48:29,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:48:29,927 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 22:48:30,186 INFO L349 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2025-03-08 22:48:30,186 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 31 treesize of output 19 [2025-03-08 22:48:30,204 INFO L349 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2025-03-08 22:48:30,205 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 31 treesize of output 19 [2025-03-08 22:48:30,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:48:30,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:48:30,566 INFO L349 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2025-03-08 22:48:30,566 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 112 treesize of output 106 [2025-03-08 22:48:30,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:48:30,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:48:30,602 INFO L349 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2025-03-08 22:48:30,602 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 104 treesize of output 98 [2025-03-08 22:48:31,220 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 22:48:31,221 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 137 treesize of output 125 [2025-03-08 22:48:31,264 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 22:48:31,269 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 117 treesize of output 167 [2025-03-08 22:48:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:48:40,789 INFO L312 TraceCheckSpWp]: Computing backward predicates...