./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0235-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8fc3dc66 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-0235-3.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 02c65307022e35fe6a7161faa785e5b34e94ccda4b82967e279eadaf3aa37bc3 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 11:56:54,061 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 11:56:54,106 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 11:56:54,110 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 11:56:54,110 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 11:56:54,125 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 11:56:54,125 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 11:56:54,125 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 11:56:54,126 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 11:56:54,126 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 11:56:54,126 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 11:56:54,126 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 11:56:54,126 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 11:56:54,126 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 11:56:54,126 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 11:56:54,126 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 11:56:54,126 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 11:56:54,126 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 11:56:54,126 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 11:56:54,126 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 11:56:54,127 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 11:56:54,127 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 11:56:54,127 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 11:56:54,127 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 11:56:54,127 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 11:56:54,127 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 11:56:54,127 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 11:56:54,127 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 11:56:54,127 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 11:56:54,127 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 11:56:54,128 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 11:56:54,128 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 11:56:54,128 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 11:56:54,128 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 11:56:54,128 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 11:56:54,128 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 11:56:54,128 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 11:56:54,128 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 11:56:54,128 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 11:56:54,128 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 11:56:54,128 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 11:56:54,129 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 11:56:54,129 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 -> 02c65307022e35fe6a7161faa785e5b34e94ccda4b82967e279eadaf3aa37bc3 [2025-03-17 11:56:54,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 11:56:54,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 11:56:54,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 11:56:54,354 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 11:56:54,354 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 11:56:54,355 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0235-3.i [2025-03-17 11:56:55,487 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcc96f0e5/c170cbb6a47d404fa8630d2842501b16/FLAG8cc6e7d5d [2025-03-17 11:56:55,755 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 11:56:55,756 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0235-3.i [2025-03-17 11:56:55,771 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcc96f0e5/c170cbb6a47d404fa8630d2842501b16/FLAG8cc6e7d5d [2025-03-17 11:56:56,058 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcc96f0e5/c170cbb6a47d404fa8630d2842501b16 [2025-03-17 11:56:56,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 11:56:56,061 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 11:56:56,062 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 11:56:56,063 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 11:56:56,066 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 11:56:56,066 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 11:56:56" (1/1) ... [2025-03-17 11:56:56,068 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ba7706c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:56:56, skipping insertion in model container [2025-03-17 11:56:56,068 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 11:56:56" (1/1) ... [2025-03-17 11:56:56,095 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 11:56:56,362 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 11:56:56,370 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 11:56:56,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 11:56:56,427 INFO L204 MainTranslator]: Completed translation [2025-03-17 11:56:56,428 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:56:56 WrapperNode [2025-03-17 11:56:56,428 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 11:56:56,429 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 11:56:56,429 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 11:56:56,429 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 11:56:56,433 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:56:56" (1/1) ... [2025-03-17 11:56:56,443 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:56:56" (1/1) ... [2025-03-17 11:56:56,464 INFO L138 Inliner]: procedures = 188, calls = 73, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 236 [2025-03-17 11:56:56,464 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 11:56:56,465 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 11:56:56,465 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 11:56:56,465 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 11:56:56,470 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:56:56" (1/1) ... [2025-03-17 11:56:56,470 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:56:56" (1/1) ... [2025-03-17 11:56:56,473 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:56:56" (1/1) ... [2025-03-17 11:56:56,496 INFO L175 MemorySlicer]: Split 39 memory accesses to 3 slices as follows [2, 11, 26]. 67 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0]. The 13 writes are split as follows [0, 1, 12]. [2025-03-17 11:56:56,496 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:56:56" (1/1) ... [2025-03-17 11:56:56,496 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:56:56" (1/1) ... [2025-03-17 11:56:56,503 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:56:56" (1/1) ... [2025-03-17 11:56:56,504 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:56:56" (1/1) ... [2025-03-17 11:56:56,505 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:56:56" (1/1) ... [2025-03-17 11:56:56,506 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:56:56" (1/1) ... [2025-03-17 11:56:56,508 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 11:56:56,508 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 11:56:56,509 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 11:56:56,509 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 11:56:56,509 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:56:56" (1/1) ... [2025-03-17 11:56:56,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 11:56:56,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 11:56:56,533 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) [2025-03-17 11:56:56,537 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 [2025-03-17 11:56:56,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 11:56:56,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 11:56:56,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-03-17 11:56:56,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-03-17 11:56:56,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-03-17 11:56:56,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-03-17 11:56:56,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-03-17 11:56:56,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-03-17 11:56:56,553 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2025-03-17 11:56:56,553 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2025-03-17 11:56:56,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-17 11:56:56,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-03-17 11:56:56,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-03-17 11:56:56,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-03-17 11:56:56,553 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2025-03-17 11:56:56,553 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2025-03-17 11:56:56,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 11:56:56,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 11:56:56,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-17 11:56:56,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 11:56:56,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 11:56:56,656 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 11:56:56,657 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 11:56:56,884 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L642: havoc calloc_model_#t~memset~res4#1.base, calloc_model_#t~memset~res4#1.offset; [2025-03-17 11:56:57,030 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L788: havoc main_#t~mem39#1.base, main_#t~mem39#1.offset; [2025-03-17 11:56:57,060 INFO L? ?]: Removed 201 outVars from TransFormulas that were not future-live. [2025-03-17 11:56:57,061 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 11:56:57,072 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 11:56:57,073 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 11:56:57,074 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 11:56:57 BoogieIcfgContainer [2025-03-17 11:56:57,074 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 11:56:57,075 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 11:56:57,076 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 11:56:57,079 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 11:56:57,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 11:56:56" (1/3) ... [2025-03-17 11:56:57,079 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e531b8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 11:56:57, skipping insertion in model container [2025-03-17 11:56:57,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 11:56:56" (2/3) ... [2025-03-17 11:56:57,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e531b8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 11:56:57, skipping insertion in model container [2025-03-17 11:56:57,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 11:56:57" (3/3) ... [2025-03-17 11:56:57,080 INFO L128 eAbstractionObserver]: Analyzing ICFG test-0235-3.i [2025-03-17 11:56:57,105 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 11:56:57,106 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG test-0235-3.i that has 3 procedures, 236 locations, 1 initial locations, 11 loop locations, and 89 error locations. [2025-03-17 11:56:57,133 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 11:56:57,140 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;@1fcf6376, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 11:56:57,141 INFO L334 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2025-03-17 11:56:57,146 INFO L276 IsEmpty]: Start isEmpty. Operand has 236 states, 131 states have (on average 1.9236641221374047) internal successors, (252), 220 states have internal predecessors, (252), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-17 11:56:57,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2025-03-17 11:56:57,149 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 11:56:57,150 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1] [2025-03-17 11:56:57,150 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 86 more)] === [2025-03-17 11:56:57,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 11:56:57,155 INFO L85 PathProgramCache]: Analyzing trace with hash 296785, now seen corresponding path program 1 times [2025-03-17 11:56:57,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 11:56:57,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478431604] [2025-03-17 11:56:57,161 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 11:56:57,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 11:56:57,216 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 11:56:57,219 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 11:56:57,220 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 11:56:57,220 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 11:56:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 11:56:57,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 11:56:57,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478431604] [2025-03-17 11:56:57,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478431604] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 11:56:57,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 11:56:57,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 11:56:57,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895996269] [2025-03-17 11:56:57,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 11:56:57,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-17 11:56:57,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 11:56:57,278 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-17 11:56:57,278 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-17 11:56:57,280 INFO L87 Difference]: Start difference. First operand has 236 states, 131 states have (on average 1.9236641221374047) internal successors, (252), 220 states have internal predecessors, (252), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 11:56:57,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 11:56:57,314 INFO L93 Difference]: Finished difference Result 236 states and 267 transitions. [2025-03-17 11:56:57,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-17 11:56:57,318 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2025-03-17 11:56:57,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 11:56:57,325 INFO L225 Difference]: With dead ends: 236 [2025-03-17 11:56:57,326 INFO L226 Difference]: Without dead ends: 234 [2025-03-17 11:56:57,327 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 [2025-03-17 11:56:57,329 INFO L435 NwaCegarLoop]: 267 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, 267 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 [2025-03-17 11:56:57,330 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 11:56:57,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2025-03-17 11:56:57,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2025-03-17 11:56:57,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 130 states have (on average 1.8384615384615384) internal successors, (239), 218 states have internal predecessors, (239), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-17 11:56:57,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 265 transitions. [2025-03-17 11:56:57,377 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 265 transitions. Word has length 3 [2025-03-17 11:56:57,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 11:56:57,378 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 265 transitions. [2025-03-17 11:56:57,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 11:56:57,378 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 265 transitions. [2025-03-17 11:56:57,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2025-03-17 11:56:57,378 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 11:56:57,378 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2025-03-17 11:56:57,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 11:56:57,379 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 86 more)] === [2025-03-17 11:56:57,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 11:56:57,380 INFO L85 PathProgramCache]: Analyzing trace with hash 285298279, now seen corresponding path program 1 times [2025-03-17 11:56:57,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 11:56:57,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322363588] [2025-03-17 11:56:57,380 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 11:56:57,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 11:56:57,388 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 11:56:57,403 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 11:56:57,404 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 11:56:57,404 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 11:56:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 11:56:57,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 11:56:57,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322363588] [2025-03-17 11:56:57,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322363588] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 11:56:57,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 11:56:57,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 11:56:57,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831432432] [2025-03-17 11:56:57,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 11:56:57,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 11:56:57,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 11:56:57,493 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 11:56:57,493 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 11:56:57,493 INFO L87 Difference]: Start difference. First operand 234 states and 265 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 11:56:57,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 11:56:57,622 INFO L93 Difference]: Finished difference Result 233 states and 264 transitions. [2025-03-17 11:56:57,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 11:56:57,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2025-03-17 11:56:57,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 11:56:57,624 INFO L225 Difference]: With dead ends: 233 [2025-03-17 11:56:57,624 INFO L226 Difference]: Without dead ends: 233 [2025-03-17 11:56:57,624 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 [2025-03-17 11:56:57,625 INFO L435 NwaCegarLoop]: 259 mSDtfsCounter, 3 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 11:56:57,625 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 435 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 11:56:57,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2025-03-17 11:56:57,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2025-03-17 11:56:57,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 130 states have (on average 1.8307692307692307) internal successors, (238), 217 states have internal predecessors, (238), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-17 11:56:57,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 264 transitions. [2025-03-17 11:56:57,642 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 264 transitions. Word has length 5 [2025-03-17 11:56:57,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 11:56:57,642 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 264 transitions. [2025-03-17 11:56:57,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 11:56:57,643 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 264 transitions. [2025-03-17 11:56:57,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-03-17 11:56:57,643 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 11:56:57,643 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-17 11:56:57,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 11:56:57,643 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 86 more)] === [2025-03-17 11:56:57,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 11:56:57,643 INFO L85 PathProgramCache]: Analyzing trace with hash 254312157, now seen corresponding path program 1 times [2025-03-17 11:56:57,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 11:56:57,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236317137] [2025-03-17 11:56:57,643 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 11:56:57,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 11:56:57,653 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 11:56:57,673 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 11:56:57,673 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 11:56:57,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-17 11:56:57,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1669278584] [2025-03-17 11:56:57,675 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 11:56:57,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 11:56:57,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 11:56:57,684 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) [2025-03-17 11:56:57,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 11:56:57,744 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 11:56:57,753 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 11:56:57,753 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 11:56:57,753 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 11:56:57,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-17 11:56:57,763 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 11:56:57,818 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 [2025-03-17 11:56:57,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 11:56:57,834 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 11:56:57,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 11:56:57,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236317137] [2025-03-17 11:56:57,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-17 11:56:57,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669278584] [2025-03-17 11:56:57,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669278584] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 11:56:57,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 11:56:57,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 11:56:57,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523571090] [2025-03-17 11:56:57,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 11:56:57,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 11:56:57,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 11:56:57,839 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 11:56:57,839 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 11:56:57,839 INFO L87 Difference]: Start difference. First operand 233 states and 264 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 11:56:58,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 11:56:58,007 INFO L93 Difference]: Finished difference Result 241 states and 272 transitions. [2025-03-17 11:56:58,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 11:56:58,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2025-03-17 11:56:58,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 11:56:58,008 INFO L225 Difference]: With dead ends: 241 [2025-03-17 11:56:58,009 INFO L226 Difference]: Without dead ends: 241 [2025-03-17 11:56:58,009 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-17 11:56:58,009 INFO L435 NwaCegarLoop]: 254 mSDtfsCounter, 10 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 11:56:58,009 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 690 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 11:56:58,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2025-03-17 11:56:58,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2025-03-17 11:56:58,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 137 states have (on average 1.7956204379562044) internal successors, (246), 224 states have internal predecessors, (246), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-17 11:56:58,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 272 transitions. [2025-03-17 11:56:58,026 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 272 transitions. Word has length 6 [2025-03-17 11:56:58,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 11:56:58,026 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 272 transitions. [2025-03-17 11:56:58,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 11:56:58,026 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 272 transitions. [2025-03-17 11:56:58,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-03-17 11:56:58,027 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 11:56:58,027 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 11:56:58,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 11:56:58,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 11:56:58,232 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 86 more)] === [2025-03-17 11:56:58,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 11:56:58,232 INFO L85 PathProgramCache]: Analyzing trace with hash -176800313, now seen corresponding path program 1 times [2025-03-17 11:56:58,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 11:56:58,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942657790] [2025-03-17 11:56:58,232 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 11:56:58,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 11:56:58,264 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-03-17 11:56:58,325 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-03-17 11:56:58,325 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 11:56:58,325 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-17 11:56:58,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627243921] [2025-03-17 11:56:58,330 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 11:56:58,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 11:56:58,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 11:56:58,332 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) [2025-03-17 11:56:58,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 11:56:58,437 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-03-17 11:56:58,495 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-03-17 11:56:58,495 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 11:56:58,495 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 11:56:58,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 58 conjuncts are in the unsatisfiable core [2025-03-17 11:56:58,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 11:56:58,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2025-03-17 11:56:58,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-17 11:56:58,635 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 14 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-17 11:56:58,636 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 11:56:58,816 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2025-03-17 11:56:58,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 11:56:58,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942657790] [2025-03-17 11:56:58,816 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-17 11:56:58,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627243921] [2025-03-17 11:56:58,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627243921] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 11:56:58,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 11:56:58,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2025-03-17 11:56:58,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595372449] [2025-03-17 11:56:58,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 11:56:58,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 11:56:58,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 11:56:58,818 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 11:56:58,818 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2025-03-17 11:56:58,818 INFO L87 Difference]: Start difference. First operand 241 states and 272 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2025-03-17 11:56:58,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 11:56:58,855 INFO L93 Difference]: Finished difference Result 246 states and 277 transitions. [2025-03-17 11:56:58,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 11:56:58,855 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 60 [2025-03-17 11:56:58,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 11:56:58,857 INFO L225 Difference]: With dead ends: 246 [2025-03-17 11:56:58,857 INFO L226 Difference]: Without dead ends: 242 [2025-03-17 11:56:58,857 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2025-03-17 11:56:58,858 INFO L435 NwaCegarLoop]: 264 mSDtfsCounter, 7 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 11:56:58,859 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 768 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 11:56:58,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2025-03-17 11:56:58,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2025-03-17 11:56:58,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 138 states have (on average 1.789855072463768) internal successors, (247), 225 states have internal predecessors, (247), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-17 11:56:58,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 273 transitions. [2025-03-17 11:56:58,892 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 273 transitions. Word has length 60 [2025-03-17 11:56:58,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 11:56:58,892 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 273 transitions. [2025-03-17 11:56:58,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2025-03-17 11:56:58,892 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 273 transitions. [2025-03-17 11:56:58,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-03-17 11:56:58,894 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 11:56:58,894 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 11:56:58,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-17 11:56:59,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-17 11:56:59,095 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 86 more)] === [2025-03-17 11:56:59,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 11:56:59,095 INFO L85 PathProgramCache]: Analyzing trace with hash -510660824, now seen corresponding path program 1 times [2025-03-17 11:56:59,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 11:56:59,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663973873] [2025-03-17 11:56:59,096 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 11:56:59,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 11:56:59,119 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-03-17 11:56:59,281 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-03-17 11:56:59,281 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 11:56:59,284 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-17 11:56:59,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [555691861] [2025-03-17 11:56:59,293 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 11:56:59,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 11:56:59,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 11:56:59,298 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) [2025-03-17 11:56:59,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 11:56:59,391 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-03-17 11:56:59,484 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-03-17 11:56:59,484 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 11:56:59,484 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 11:56:59,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-17 11:56:59,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 11:56:59,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-17 11:56:59,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-17 11:56:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 94 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-17 11:56:59,612 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 11:56:59,784 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 35 proven. 21 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2025-03-17 11:56:59,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 11:56:59,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663973873] [2025-03-17 11:56:59,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-17 11:56:59,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555691861] [2025-03-17 11:56:59,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555691861] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 11:56:59,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-17 11:56:59,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2025-03-17 11:56:59,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175682624] [2025-03-17 11:56:59,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-17 11:56:59,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 11:56:59,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 11:56:59,787 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 11:56:59,787 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-03-17 11:56:59,787 INFO L87 Difference]: Start difference. First operand 242 states and 273 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-17 11:57:00,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 11:57:00,067 INFO L93 Difference]: Finished difference Result 259 states and 292 transitions. [2025-03-17 11:57:00,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 11:57:00,068 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 65 [2025-03-17 11:57:00,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 11:57:00,069 INFO L225 Difference]: With dead ends: 259 [2025-03-17 11:57:00,069 INFO L226 Difference]: Without dead ends: 247 [2025-03-17 11:57:00,069 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2025-03-17 11:57:00,069 INFO L435 NwaCegarLoop]: 258 mSDtfsCounter, 20 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 11:57:00,069 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1209 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 11:57:00,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2025-03-17 11:57:00,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2025-03-17 11:57:00,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 143 states have (on average 1.7692307692307692) internal successors, (253), 230 states have internal predecessors, (253), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-17 11:57:00,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 279 transitions. [2025-03-17 11:57:00,082 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 279 transitions. Word has length 65 [2025-03-17 11:57:00,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 11:57:00,082 INFO L471 AbstractCegarLoop]: Abstraction has 247 states and 279 transitions. [2025-03-17 11:57:00,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-17 11:57:00,082 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 279 transitions. [2025-03-17 11:57:00,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2025-03-17 11:57:00,083 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 11:57:00,084 INFO L218 NwaCegarLoop]: trace histogram [20, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 11:57:00,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-17 11:57:00,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 11:57:00,288 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 86 more)] === [2025-03-17 11:57:00,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 11:57:00,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1995654393, now seen corresponding path program 2 times [2025-03-17 11:57:00,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 11:57:00,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8842234] [2025-03-17 11:57:00,289 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 11:57:00,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 11:57:00,314 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 80 statements into 2 equivalence classes. [2025-03-17 11:57:00,443 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 80 of 80 statements. [2025-03-17 11:57:00,443 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 11:57:00,443 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-17 11:57:00,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028954027] [2025-03-17 11:57:00,450 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 11:57:00,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 11:57:00,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 11:57:00,451 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) [2025-03-17 11:57:00,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 11:57:00,555 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 80 statements into 2 equivalence classes. [2025-03-17 11:57:00,794 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 80 of 80 statements. [2025-03-17 11:57:00,794 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 11:57:00,794 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 11:57:00,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-17 11:57:00,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 11:57:00,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-17 11:57:00,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-17 11:57:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 247 proven. 56 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2025-03-17 11:57:00,998 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 11:57:01,253 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 77 proven. 72 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2025-03-17 11:57:01,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 11:57:01,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8842234] [2025-03-17 11:57:01,253 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-17 11:57:01,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028954027] [2025-03-17 11:57:01,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028954027] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 11:57:01,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-17 11:57:01,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2025-03-17 11:57:01,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302305206] [2025-03-17 11:57:01,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-17 11:57:01,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-17 11:57:01,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 11:57:01,255 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-17 11:57:01,256 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2025-03-17 11:57:01,256 INFO L87 Difference]: Start difference. First operand 247 states and 279 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-17 11:57:01,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 11:57:01,824 INFO L93 Difference]: Finished difference Result 266 states and 302 transitions. [2025-03-17 11:57:01,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-17 11:57:01,825 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2025-03-17 11:57:01,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 11:57:01,826 INFO L225 Difference]: With dead ends: 266 [2025-03-17 11:57:01,826 INFO L226 Difference]: Without dead ends: 254 [2025-03-17 11:57:01,826 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=852, Unknown=0, NotChecked=0, Total=1122 [2025-03-17 11:57:01,827 INFO L435 NwaCegarLoop]: 258 mSDtfsCounter, 20 mSDsluCounter, 2911 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 3169 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 11:57:01,827 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 3169 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 11:57:01,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2025-03-17 11:57:01,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2025-03-17 11:57:01,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 150 states have (on average 1.7266666666666666) internal successors, (259), 237 states have internal predecessors, (259), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-17 11:57:01,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 285 transitions. [2025-03-17 11:57:01,837 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 285 transitions. Word has length 80 [2025-03-17 11:57:01,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 11:57:01,837 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 285 transitions. [2025-03-17 11:57:01,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-17 11:57:01,837 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 285 transitions. [2025-03-17 11:57:01,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2025-03-17 11:57:01,838 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 11:57:01,838 INFO L218 NwaCegarLoop]: trace histogram [40, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 11:57:01,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-17 11:57:02,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 11:57:02,040 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 86 more)] === [2025-03-17 11:57:02,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 11:57:02,041 INFO L85 PathProgramCache]: Analyzing trace with hash -2042619833, now seen corresponding path program 3 times [2025-03-17 11:57:02,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 11:57:02,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406975010] [2025-03-17 11:57:02,041 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 11:57:02,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 11:57:02,085 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 100 statements into 18 equivalence classes. [2025-03-17 11:57:02,626 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) and asserted 100 of 100 statements. [2025-03-17 11:57:02,627 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2025-03-17 11:57:02,627 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-17 11:57:02,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596356272] [2025-03-17 11:57:02,639 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 11:57:02,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 11:57:02,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 11:57:02,642 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 11:57:02,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 11:57:02,771 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 100 statements into 18 equivalence classes. [2025-03-17 11:57:02,791 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 100 statements. [2025-03-17 11:57:02,791 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 11:57:02,791 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 11:57:02,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-17 11:57:02,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 11:57:02,813 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 [2025-03-17 11:57:02,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1075 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1060 trivial. 0 not checked. [2025-03-17 11:57:02,828 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 11:57:02,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 11:57:02,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406975010] [2025-03-17 11:57:02,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-17 11:57:02,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596356272] [2025-03-17 11:57:02,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596356272] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 11:57:02,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 11:57:02,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 11:57:02,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899940256] [2025-03-17 11:57:02,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 11:57:02,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 11:57:02,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 11:57:02,829 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 11:57:02,829 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 11:57:02,830 INFO L87 Difference]: Start difference. First operand 254 states and 285 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2025-03-17 11:57:02,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 11:57:02,924 INFO L93 Difference]: Finished difference Result 253 states and 284 transitions. [2025-03-17 11:57:02,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 11:57:02,925 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 100 [2025-03-17 11:57:02,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 11:57:02,926 INFO L225 Difference]: With dead ends: 253 [2025-03-17 11:57:02,926 INFO L226 Difference]: Without dead ends: 253 [2025-03-17 11:57:02,926 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-17 11:57:02,926 INFO L435 NwaCegarLoop]: 265 mSDtfsCounter, 10 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 11:57:02,927 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 711 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 11:57:02,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2025-03-17 11:57:02,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2025-03-17 11:57:02,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 150 states have (on average 1.72) internal successors, (258), 236 states have internal predecessors, (258), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-17 11:57:02,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 284 transitions. [2025-03-17 11:57:02,935 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 284 transitions. Word has length 100 [2025-03-17 11:57:02,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 11:57:02,937 INFO L471 AbstractCegarLoop]: Abstraction has 253 states and 284 transitions. [2025-03-17 11:57:02,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2025-03-17 11:57:02,937 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 284 transitions. [2025-03-17 11:57:02,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2025-03-17 11:57:02,940 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 11:57:02,940 INFO L218 NwaCegarLoop]: trace histogram [45, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 11:57:02,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-17 11:57:03,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 11:57:03,145 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 86 more)] === [2025-03-17 11:57:03,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 11:57:03,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1936525155, now seen corresponding path program 1 times [2025-03-17 11:57:03,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 11:57:03,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973056343] [2025-03-17 11:57:03,146 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 11:57:03,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 11:57:03,179 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 111 statements into 1 equivalence classes. [2025-03-17 11:57:03,221 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 111 of 111 statements. [2025-03-17 11:57:03,221 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 11:57:03,221 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 11:57:04,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 649 proven. 4 refuted. 0 times theorem prover too weak. 727 trivial. 0 not checked. [2025-03-17 11:57:04,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 11:57:04,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973056343] [2025-03-17 11:57:04,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973056343] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 11:57:04,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110373995] [2025-03-17 11:57:04,073 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 11:57:04,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 11:57:04,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 11:57:04,075 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 11:57:04,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 11:57:04,234 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 111 statements into 1 equivalence classes. [2025-03-17 11:57:04,363 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 111 of 111 statements. [2025-03-17 11:57:04,363 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 11:57:04,363 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 11:57:04,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-17 11:57:04,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 11:57:04,435 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|)) is different from true [2025-03-17 11:57:04,484 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-03-17 11:57:04,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-03-17 11:57:04,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 593 proven. 1 refuted. 0 times theorem prover too weak. 727 trivial. 59 not checked. [2025-03-17 11:57:04,496 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 11:57:04,702 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-17 11:57:04,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2025-03-17 11:57:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 593 proven. 60 refuted. 0 times theorem prover too weak. 727 trivial. 0 not checked. [2025-03-17 11:57:04,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110373995] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 11:57:04,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 11:57:04,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 15 [2025-03-17 11:57:04,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065579030] [2025-03-17 11:57:04,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 11:57:04,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 11:57:04,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 11:57:04,725 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 11:57:04,725 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=172, Unknown=1, NotChecked=26, Total=240 [2025-03-17 11:57:04,726 INFO L87 Difference]: Start difference. First operand 253 states and 284 transitions. Second operand has 16 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-17 11:57:05,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 11:57:05,293 INFO L93 Difference]: Finished difference Result 352 states and 404 transitions. [2025-03-17 11:57:05,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 11:57:05,293 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 111 [2025-03-17 11:57:05,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 11:57:05,296 INFO L225 Difference]: With dead ends: 352 [2025-03-17 11:57:05,296 INFO L226 Difference]: Without dead ends: 352 [2025-03-17 11:57:05,297 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 214 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=277, Unknown=1, NotChecked=34, Total=380 [2025-03-17 11:57:05,297 INFO L435 NwaCegarLoop]: 212 mSDtfsCounter, 125 mSDsluCounter, 1576 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1788 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 376 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-17 11:57:05,297 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 1788 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1005 Invalid, 0 Unknown, 376 Unchecked, 0.5s Time] [2025-03-17 11:57:05,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2025-03-17 11:57:05,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 251. [2025-03-17 11:57:05,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 150 states have (on average 1.7066666666666668) internal successors, (256), 234 states have internal predecessors, (256), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-17 11:57:05,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 282 transitions. [2025-03-17 11:57:05,303 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 282 transitions. Word has length 111 [2025-03-17 11:57:05,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 11:57:05,303 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 282 transitions. [2025-03-17 11:57:05,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-17 11:57:05,304 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 282 transitions. [2025-03-17 11:57:05,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2025-03-17 11:57:05,304 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 11:57:05,304 INFO L218 NwaCegarLoop]: trace histogram [45, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 11:57:05,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-17 11:57:05,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 11:57:05,505 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 86 more)] === [2025-03-17 11:57:05,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 11:57:05,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1936525154, now seen corresponding path program 1 times [2025-03-17 11:57:05,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 11:57:05,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86571895] [2025-03-17 11:57:05,506 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 11:57:05,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 11:57:05,543 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 111 statements into 1 equivalence classes. [2025-03-17 11:57:05,646 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 111 of 111 statements. [2025-03-17 11:57:05,646 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 11:57:05,647 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 11:57:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 593 proven. 96 refuted. 0 times theorem prover too weak. 691 trivial. 0 not checked. [2025-03-17 11:57:07,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 11:57:07,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86571895] [2025-03-17 11:57:07,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86571895] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 11:57:07,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448056265] [2025-03-17 11:57:07,500 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 11:57:07,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 11:57:07,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 11:57:07,502 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 11:57:07,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 11:57:07,699 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 111 statements into 1 equivalence classes. [2025-03-17 11:57:08,707 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 111 of 111 statements. [2025-03-17 11:57:08,707 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 11:57:08,707 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 11:57:08,714 INFO L256 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 89 conjuncts are in the unsatisfiable core [2025-03-17 11:57:08,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 11:57:08,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-17 11:57:55,258 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2025-03-17 11:57:55,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 11:57:55,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-03-17 11:57:55,307 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 11:57:55,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-17 11:57:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 411 proven. 526 refuted. 0 times theorem prover too weak. 299 trivial. 144 not checked. [2025-03-17 11:57:55,309 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 11:57:55,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448056265] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 11:57:55,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-17 11:57:55,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27] total 37 [2025-03-17 11:57:55,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27200483] [2025-03-17 11:57:55,459 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-17 11:57:55,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-17 11:57:55,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 11:57:55,460 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-17 11:57:55,461 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1358, Unknown=12, NotChecked=74, Total=1560 [2025-03-17 11:57:55,461 INFO L87 Difference]: Start difference. First operand 251 states and 282 transitions. Second operand has 38 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-17 11:57:59,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-03-17 11:58:03,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 11:58:03,072 INFO L93 Difference]: Finished difference Result 357 states and 412 transitions. [2025-03-17 11:58:03,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-17 11:58:03,072 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 111 [2025-03-17 11:58:03,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 11:58:03,074 INFO L225 Difference]: With dead ends: 357 [2025-03-17 11:58:03,074 INFO L226 Difference]: Without dead ends: 357 [2025-03-17 11:58:03,075 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 47.5s TimeCoverageRelationStatistics Valid=248, Invalid=2500, Unknown=12, NotChecked=102, Total=2862 [2025-03-17 11:58:03,075 INFO L435 NwaCegarLoop]: 126 mSDtfsCounter, 376 mSDsluCounter, 1907 mSDsCounter, 0 mSdLazyCounter, 5485 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 2033 SdHoareTripleChecker+Invalid, 5888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 5485 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 374 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2025-03-17 11:58:03,076 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 2033 Invalid, 5888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 5485 Invalid, 1 Unknown, 374 Unchecked, 6.8s Time] [2025-03-17 11:58:03,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2025-03-17 11:58:03,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 249. [2025-03-17 11:58:03,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 150 states have (on average 1.6933333333333334) internal successors, (254), 232 states have internal predecessors, (254), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-17 11:58:03,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 280 transitions. [2025-03-17 11:58:03,087 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 280 transitions. Word has length 111 [2025-03-17 11:58:03,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 11:58:03,087 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 280 transitions. [2025-03-17 11:58:03,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-17 11:58:03,088 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 280 transitions. [2025-03-17 11:58:03,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2025-03-17 11:58:03,088 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 11:58:03,088 INFO L218 NwaCegarLoop]: trace histogram [45, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 11:58:03,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-17 11:58:03,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 11:58:03,289 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr45REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 86 more)] === [2025-03-17 11:58:03,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 11:58:03,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1279827942, now seen corresponding path program 1 times [2025-03-17 11:58:03,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 11:58:03,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467224669] [2025-03-17 11:58:03,290 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 11:58:03,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 11:58:03,328 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 113 statements into 1 equivalence classes. [2025-03-17 11:58:03,366 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 113 of 113 statements. [2025-03-17 11:58:03,367 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 11:58:03,367 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 11:58:04,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 710 proven. 207 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2025-03-17 11:58:04,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 11:58:04,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467224669] [2025-03-17 11:58:04,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467224669] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 11:58:04,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240430030] [2025-03-17 11:58:04,243 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 11:58:04,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 11:58:04,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 11:58:04,245 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 11:58:04,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 11:58:04,449 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 113 statements into 1 equivalence classes. [2025-03-17 11:58:04,553 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 113 of 113 statements. [2025-03-17 11:58:04,554 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 11:58:04,554 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 11:58:04,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 1221 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-17 11:58:04,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 11:58:04,610 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#valid| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|))) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2025-03-17 11:58:04,678 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-03-17 11:58:04,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-03-17 11:58:04,705 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|)) is different from true [2025-03-17 11:58:04,728 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-03-17 11:58:04,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-03-17 11:58:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 710 proven. 1 refuted. 0 times theorem prover too weak. 463 trivial. 206 not checked. [2025-03-17 11:58:04,742 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 11:58:04,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240430030] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 11:58:04,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-17 11:58:04,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2025-03-17 11:58:04,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386237122] [2025-03-17 11:58:04,928 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-17 11:58:04,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-17 11:58:04,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 11:58:04,929 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-17 11:58:04,929 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=324, Unknown=2, NotChecked=74, Total=462 [2025-03-17 11:58:04,929 INFO L87 Difference]: Start difference. First operand 249 states and 280 transitions. Second operand has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 2 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-17 11:58:05,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 11:58:05,665 INFO L93 Difference]: Finished difference Result 347 states and 399 transitions. [2025-03-17 11:58:05,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 11:58:05,665 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 2 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 113 [2025-03-17 11:58:05,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 11:58:05,667 INFO L225 Difference]: With dead ends: 347 [2025-03-17 11:58:05,667 INFO L226 Difference]: Without dead ends: 347 [2025-03-17 11:58:05,667 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 124 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=506, Unknown=2, NotChecked=94, Total=702 [2025-03-17 11:58:05,667 INFO L435 NwaCegarLoop]: 201 mSDtfsCounter, 246 mSDsluCounter, 1948 mSDsCounter, 0 mSdLazyCounter, 1328 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 2149 SdHoareTripleChecker+Invalid, 2095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 741 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-17 11:58:05,667 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 2149 Invalid, 2095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1328 Invalid, 0 Unknown, 741 Unchecked, 0.6s Time] [2025-03-17 11:58:05,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2025-03-17 11:58:05,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 246. [2025-03-17 11:58:05,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 150 states have (on average 1.6733333333333333) internal successors, (251), 229 states have internal predecessors, (251), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-17 11:58:05,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 277 transitions. [2025-03-17 11:58:05,674 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 277 transitions. Word has length 113 [2025-03-17 11:58:05,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 11:58:05,675 INFO L471 AbstractCegarLoop]: Abstraction has 246 states and 277 transitions. [2025-03-17 11:58:05,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 2 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-17 11:58:05,675 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 277 transitions. [2025-03-17 11:58:05,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2025-03-17 11:58:05,676 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 11:58:05,676 INFO L218 NwaCegarLoop]: trace histogram [45, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 11:58:05,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-17 11:58:05,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-17 11:58:05,880 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 86 more)] === [2025-03-17 11:58:05,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 11:58:05,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1279827941, now seen corresponding path program 1 times [2025-03-17 11:58:05,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 11:58:05,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581840618] [2025-03-17 11:58:05,881 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 11:58:05,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 11:58:05,925 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 113 statements into 1 equivalence classes. [2025-03-17 11:58:06,038 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 113 of 113 statements. [2025-03-17 11:58:06,039 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 11:58:06,039 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 11:58:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 710 proven. 243 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2025-03-17 11:58:07,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 11:58:07,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581840618] [2025-03-17 11:58:07,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581840618] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 11:58:07,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274856642] [2025-03-17 11:58:07,817 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 11:58:07,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 11:58:07,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 11:58:07,819 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 11:58:07,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 11:58:08,038 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 113 statements into 1 equivalence classes. [2025-03-17 11:58:08,762 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 113 of 113 statements. [2025-03-17 11:58:08,762 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 11:58:08,762 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 11:58:08,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 1221 conjuncts, 106 conjuncts are in the unsatisfiable core [2025-03-17 11:58:08,774 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 11:58:08,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-03-17 11:58:17,210 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#valid| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|))) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2025-03-17 11:58:17,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 11:58:17,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2025-03-17 11:58:17,343 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-03-17 11:58:17,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-03-17 11:58:17,369 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~ptr~0#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_calloc_model_~ptr~0#1.base| (select |c_#length| |zalloc_or_die_calloc_model_~ptr~0#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_calloc_model_~ptr~0#1.base|) 0))) is different from true [2025-03-17 11:58:17,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 11:58:17,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2025-03-17 11:58:17,418 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 11:58:17,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-17 11:58:17,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 402 proven. 400 refuted. 0 times theorem prover too weak. 161 trivial. 417 not checked. [2025-03-17 11:58:17,533 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 11:58:17,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274856642] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 11:58:17,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-17 11:58:17,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 29] total 50 [2025-03-17 11:58:17,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290745498] [2025-03-17 11:58:17,666 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-17 11:58:17,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2025-03-17 11:58:17,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 11:58:17,667 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2025-03-17 11:58:17,668 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2388, Unknown=3, NotChecked=198, Total=2756 [2025-03-17 11:58:17,668 INFO L87 Difference]: Start difference. First operand 246 states and 277 transitions. Second operand has 51 states, 50 states have (on average 1.96) internal successors, (98), 48 states have internal predecessors, (98), 3 states have call successors, (8), 2 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 3 states have call successors, (9) [2025-03-17 11:58:21,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-03-17 11:58:25,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-03-17 11:58:30,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0]