./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/memsafety/test-0237.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version da043454 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 ../../../trunk/examples/svcomp/memsafety/test-0237.c -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 387e72b1e16afd4647457d8500bfc2694ebf7f19e0a3f0d4a21a9e6683663d36 --- Real Ultimate output --- This is Ultimate 0.3.0-wip.fs.system-includes-da04345-m [2025-04-29 11:25:32,005 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-29 11:25:32,060 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-04-29 11:25:32,065 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-29 11:25:32,065 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-29 11:25:32,084 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-29 11:25:32,084 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-29 11:25:32,084 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-29 11:25:32,085 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-29 11:25:32,085 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-29 11:25:32,085 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-29 11:25:32,085 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-29 11:25:32,086 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-29 11:25:32,086 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-29 11:25:32,086 INFO L153 SettingsManager]: * Use SBE=true [2025-04-29 11:25:32,087 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-29 11:25:32,087 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-29 11:25:32,087 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-29 11:25:32,087 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-29 11:25:32,087 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-29 11:25:32,087 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-04-29 11:25:32,087 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-04-29 11:25:32,087 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-04-29 11:25:32,087 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-29 11:25:32,087 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-04-29 11:25:32,087 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-04-29 11:25:32,087 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-29 11:25:32,087 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-29 11:25:32,087 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-29 11:25:32,087 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-29 11:25:32,087 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-29 11:25:32,087 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-29 11:25:32,087 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-29 11:25:32,087 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-29 11:25:32,087 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-29 11:25:32,087 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-29 11:25:32,087 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-29 11:25:32,087 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-29 11:25:32,088 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-29 11:25:32,088 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-29 11:25:32,088 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-29 11:25:32,088 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-29 11:25:32,088 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-29 11:25:32,088 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-29 11:25:32,088 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-29 11:25:32,088 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-29 11:25:32,088 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 -> 387e72b1e16afd4647457d8500bfc2694ebf7f19e0a3f0d4a21a9e6683663d36 [2025-04-29 11:25:32,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-29 11:25:32,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-29 11:25:32,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-29 11:25:32,306 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-29 11:25:32,307 INFO L274 PluginConnector]: CDTParser initialized [2025-04-29 11:25:32,308 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety/test-0237.c [2025-04-29 11:25:33,609 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/308adba12/d00e836deb7046c5b18b9f11a198c482/FLAGdd5e5e49c [2025-04-29 11:25:33,855 INFO L389 CDTParser]: Found 1 translation units. [2025-04-29 11:25:33,855 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/memsafety/test-0237.c [2025-04-29 11:25:33,856 WARN L117 ultiparseSymbolTable]: System include assert.h could not be resolved by CDT -- only built-in system includes are available. [2025-04-29 11:25:33,856 WARN L117 ultiparseSymbolTable]: System include stdlib.h could not be resolved by CDT -- only built-in system includes are available. [2025-04-29 11:25:33,856 WARN L117 ultiparseSymbolTable]: System include string.h could not be resolved by CDT -- only built-in system includes are available. [2025-04-29 11:25:33,862 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/308adba12/d00e836deb7046c5b18b9f11a198c482/FLAGdd5e5e49c [2025-04-29 11:25:34,610 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/308adba12/d00e836deb7046c5b18b9f11a198c482 [2025-04-29 11:25:34,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-29 11:25:34,613 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-04-29 11:25:34,615 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-29 11:25:34,615 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-29 11:25:34,620 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-29 11:25:34,620 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.04 11:25:34" (1/1) ... [2025-04-29 11:25:34,621 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eb0ff89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:34, skipping insertion in model container [2025-04-29 11:25:34,621 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.04 11:25:34" (1/1) ... [2025-04-29 11:25:34,633 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-29 11:25:34,758 WARN L1150 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-04-29 11:25:34,779 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-29 11:25:34,785 INFO L200 MainTranslator]: Completed pre-run [2025-04-29 11:25:34,816 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-29 11:25:34,826 INFO L204 MainTranslator]: Completed translation [2025-04-29 11:25:34,827 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:34 WrapperNode [2025-04-29 11:25:34,827 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-29 11:25:34,828 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-29 11:25:34,828 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-29 11:25:34,828 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-29 11:25:34,832 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:34" (1/1) ... [2025-04-29 11:25:34,840 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:34" (1/1) ... [2025-04-29 11:25:34,867 INFO L138 Inliner]: procedures = 25, calls = 62, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 207 [2025-04-29 11:25:34,868 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-29 11:25:34,868 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-29 11:25:34,868 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-29 11:25:34,868 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-29 11:25:34,874 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:34" (1/1) ... [2025-04-29 11:25:34,874 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:34" (1/1) ... [2025-04-29 11:25:34,878 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:34" (1/1) ... [2025-04-29 11:25:34,910 INFO L175 MemorySlicer]: Split 35 memory accesses to 2 slices as follows [4, 31]. 89 percent of accesses are in the largest equivalence class. The 1 initializations are split as follows [1, 0]. The 17 writes are split as follows [1, 16]. [2025-04-29 11:25:34,910 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:34" (1/1) ... [2025-04-29 11:25:34,910 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:34" (1/1) ... [2025-04-29 11:25:34,919 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:34" (1/1) ... [2025-04-29 11:25:34,920 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:34" (1/1) ... [2025-04-29 11:25:34,927 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:34" (1/1) ... [2025-04-29 11:25:34,933 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:34" (1/1) ... [2025-04-29 11:25:34,934 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:34" (1/1) ... [2025-04-29 11:25:34,937 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-29 11:25:34,938 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-29 11:25:34,938 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-29 11:25:34,939 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-29 11:25:34,939 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:34" (1/1) ... [2025-04-29 11:25:34,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-29 11:25:34,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:25:34,971 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) [2025-04-29 11:25:34,974 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 [2025-04-29 11:25:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-04-29 11:25:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-04-29 11:25:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-29 11:25:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-04-29 11:25:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-04-29 11:25:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-04-29 11:25:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-04-29 11:25:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2025-04-29 11:25:34,992 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2025-04-29 11:25:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-04-29 11:25:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-29 11:25:34,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-29 11:25:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-04-29 11:25:35,070 INFO L234 CfgBuilder]: Building ICFG [2025-04-29 11:25:35,071 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-29 11:25:35,471 INFO L? ?]: Removed 225 outVars from TransFormulas that were not future-live. [2025-04-29 11:25:35,471 INFO L283 CfgBuilder]: Performing block encoding [2025-04-29 11:25:35,483 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-29 11:25:35,483 INFO L312 CfgBuilder]: Removed 10 assume(true) statements. [2025-04-29 11:25:35,483 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.04 11:25:35 BoogieIcfgContainer [2025-04-29 11:25:35,483 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-29 11:25:35,485 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-29 11:25:35,485 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-29 11:25:35,489 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-29 11:25:35,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.04 11:25:34" (1/3) ... [2025-04-29 11:25:35,490 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee0039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.04 11:25:35, skipping insertion in model container [2025-04-29 11:25:35,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:34" (2/3) ... [2025-04-29 11:25:35,491 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee0039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.04 11:25:35, skipping insertion in model container [2025-04-29 11:25:35,491 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.04 11:25:35" (3/3) ... [2025-04-29 11:25:35,492 INFO L128 eAbstractionObserver]: Analyzing ICFG test-0237.c [2025-04-29 11:25:35,503 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-29 11:25:35,504 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG test-0237.c that has 2 procedures, 205 locations, 237 edges, 1 initial locations, 11 loop locations, and 87 error locations. [2025-04-29 11:25:35,541 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-29 11:25:35,549 INFO L340 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;@4bbaae38, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-29 11:25:35,549 INFO L341 AbstractCegarLoop]: Starting to check reachability of 87 error locations. [2025-04-29 11:25:35,552 INFO L278 IsEmpty]: Start isEmpty. Operand has 205 states, 110 states have (on average 1.990909090909091) internal successors, (219), 197 states have internal predecessors, (219), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-04-29 11:25:35,556 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2025-04-29 11:25:35,556 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:25:35,556 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2025-04-29 11:25:35,558 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2025-04-29 11:25:35,561 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:25:35,562 INFO L85 PathProgramCache]: Analyzing trace with hash 930566, now seen corresponding path program 1 times [2025-04-29 11:25:35,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:25:35,567 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486519989] [2025-04-29 11:25:35,567 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:35,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:25:35,612 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-29 11:25:35,621 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-29 11:25:35,621 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:35,621 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:25:35,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:25:35,647 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486519989] [2025-04-29 11:25:35,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486519989] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:25:35,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:25:35,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-29 11:25:35,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660475088] [2025-04-29 11:25:35,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:25:35,653 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-04-29 11:25:35,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:25:35,671 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-04-29 11:25:35,672 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-04-29 11:25:35,674 INFO L87 Difference]: Start difference. First operand has 205 states, 110 states have (on average 1.990909090909091) internal successors, (219), 197 states have internal predecessors, (219), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:25:35,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 11:25:35,704 INFO L93 Difference]: Finished difference Result 205 states and 220 transitions. [2025-04-29 11:25:35,705 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-29 11:25:35,706 INFO L79 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2025-04-29 11:25:35,706 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 11:25:35,712 INFO L225 Difference]: With dead ends: 205 [2025-04-29 11:25:35,712 INFO L226 Difference]: Without dead ends: 203 [2025-04-29 11:25:35,714 INFO L436 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 [2025-04-29 11:25:35,717 INFO L437 NwaCegarLoop]: 220 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, 220 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 [2025-04-29 11:25:35,719 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-04-29 11:25:35,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2025-04-29 11:25:35,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2025-04-29 11:25:35,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 109 states have (on average 1.889908256880734) internal successors, (206), 195 states have internal predecessors, (206), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-04-29 11:25:35,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 218 transitions. [2025-04-29 11:25:35,766 INFO L79 Accepts]: Start accepts. Automaton has 203 states and 218 transitions. Word has length 4 [2025-04-29 11:25:35,767 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 11:25:35,767 INFO L485 AbstractCegarLoop]: Abstraction has 203 states and 218 transitions. [2025-04-29 11:25:35,767 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:25:35,767 INFO L278 IsEmpty]: Start isEmpty. Operand 203 states and 218 transitions. [2025-04-29 11:25:35,767 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-04-29 11:25:35,767 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:25:35,767 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-04-29 11:25:35,768 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-29 11:25:35,768 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2025-04-29 11:25:35,769 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:25:35,769 INFO L85 PathProgramCache]: Analyzing trace with hash 889856520, now seen corresponding path program 1 times [2025-04-29 11:25:35,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:25:35,769 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586160225] [2025-04-29 11:25:35,769 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:35,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:25:35,780 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-29 11:25:35,797 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-29 11:25:35,797 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:35,797 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:25:35,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:25:35,895 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586160225] [2025-04-29 11:25:35,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586160225] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:25:35,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:25:35,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-29 11:25:35,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360469728] [2025-04-29 11:25:35,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:25:35,896 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-29 11:25:35,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:25:35,896 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-29 11:25:35,896 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-29 11:25:35,897 INFO L87 Difference]: Start difference. First operand 203 states and 218 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:25:36,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 11:25:36,052 INFO L93 Difference]: Finished difference Result 202 states and 217 transitions. [2025-04-29 11:25:36,052 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-29 11:25:36,052 INFO L79 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2025-04-29 11:25:36,052 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 11:25:36,053 INFO L225 Difference]: With dead ends: 202 [2025-04-29 11:25:36,053 INFO L226 Difference]: Without dead ends: 202 [2025-04-29 11:25:36,053 INFO L436 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 [2025-04-29 11:25:36,054 INFO L437 NwaCegarLoop]: 212 mSDtfsCounter, 4 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-04-29 11:25:36,054 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 341 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-04-29 11:25:36,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2025-04-29 11:25:36,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2025-04-29 11:25:36,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 109 states have (on average 1.8807339449541285) internal successors, (205), 194 states have internal predecessors, (205), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-04-29 11:25:36,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 217 transitions. [2025-04-29 11:25:36,064 INFO L79 Accepts]: Start accepts. Automaton has 202 states and 217 transitions. Word has length 6 [2025-04-29 11:25:36,064 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 11:25:36,064 INFO L485 AbstractCegarLoop]: Abstraction has 202 states and 217 transitions. [2025-04-29 11:25:36,064 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:25:36,065 INFO L278 IsEmpty]: Start isEmpty. Operand 202 states and 217 transitions. [2025-04-29 11:25:36,065 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-04-29 11:25:36,065 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:25:36,065 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:25:36,065 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-29 11:25:36,065 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2025-04-29 11:25:36,066 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:25:36,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1815748688, now seen corresponding path program 1 times [2025-04-29 11:25:36,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:25:36,066 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318356070] [2025-04-29 11:25:36,066 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:36,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:25:36,071 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-29 11:25:36,079 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-29 11:25:36,079 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:36,079 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-29 11:25:36,080 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67635235] [2025-04-29 11:25:36,081 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:36,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:25:36,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:25:36,084 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) [2025-04-29 11:25:36,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-29 11:25:36,133 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-29 11:25:36,142 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-29 11:25:36,142 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:36,142 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:36,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-04-29 11:25:36,151 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:25:36,204 INFO L354 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 [2025-04-29 11:25:36,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:25:36,221 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-29 11:25:36,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:25:36,221 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318356070] [2025-04-29 11:25:36,222 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-29 11:25:36,222 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67635235] [2025-04-29 11:25:36,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67635235] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:25:36,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:25:36,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-29 11:25:36,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206115942] [2025-04-29 11:25:36,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:25:36,222 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-29 11:25:36,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:25:36,223 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-29 11:25:36,223 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-29 11:25:36,223 INFO L87 Difference]: Start difference. First operand 202 states and 217 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:25:36,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 11:25:36,329 INFO L93 Difference]: Finished difference Result 211 states and 226 transitions. [2025-04-29 11:25:36,329 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-29 11:25:36,329 INFO L79 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-04-29 11:25:36,329 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 11:25:36,330 INFO L225 Difference]: With dead ends: 211 [2025-04-29 11:25:36,330 INFO L226 Difference]: Without dead ends: 211 [2025-04-29 11:25:36,330 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-04-29 11:25:36,331 INFO L437 NwaCegarLoop]: 211 mSDtfsCounter, 11 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-04-29 11:25:36,331 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 562 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-04-29 11:25:36,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2025-04-29 11:25:36,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2025-04-29 11:25:36,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 117 states have (on average 1.829059829059829) internal successors, (214), 202 states have internal predecessors, (214), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-04-29 11:25:36,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 226 transitions. [2025-04-29 11:25:36,346 INFO L79 Accepts]: Start accepts. Automaton has 211 states and 226 transitions. Word has length 7 [2025-04-29 11:25:36,346 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 11:25:36,346 INFO L485 AbstractCegarLoop]: Abstraction has 211 states and 226 transitions. [2025-04-29 11:25:36,346 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:25:36,347 INFO L278 IsEmpty]: Start isEmpty. Operand 211 states and 226 transitions. [2025-04-29 11:25:36,347 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-04-29 11:25:36,347 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:25:36,347 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:25:36,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-04-29 11:25:36,547 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:25:36,548 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2025-04-29 11:25:36,549 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:25:36,549 INFO L85 PathProgramCache]: Analyzing trace with hash 680556135, now seen corresponding path program 1 times [2025-04-29 11:25:36,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:25:36,549 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501243988] [2025-04-29 11:25:36,550 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:36,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:25:36,560 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-29 11:25:36,582 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-29 11:25:36,582 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:36,582 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-29 11:25:36,584 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29837801] [2025-04-29 11:25:36,584 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:36,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:25:36,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:25:36,586 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) [2025-04-29 11:25:36,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-29 11:25:36,637 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-29 11:25:36,654 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-29 11:25:36,655 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:36,655 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:36,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-04-29 11:25:36,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:25:36,679 INFO L354 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 [2025-04-29 11:25:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:25:36,696 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-29 11:25:36,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:25:36,697 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501243988] [2025-04-29 11:25:36,697 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-29 11:25:36,697 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29837801] [2025-04-29 11:25:36,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29837801] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:25:36,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:25:36,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-29 11:25:36,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102781924] [2025-04-29 11:25:36,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:25:36,697 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-29 11:25:36,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:25:36,698 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-29 11:25:36,698 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-29 11:25:36,699 INFO L87 Difference]: Start difference. First operand 211 states and 226 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-04-29 11:25:36,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 11:25:36,811 INFO L93 Difference]: Finished difference Result 220 states and 235 transitions. [2025-04-29 11:25:36,811 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-29 11:25:36,811 INFO L79 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2025-04-29 11:25:36,811 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 11:25:36,812 INFO L225 Difference]: With dead ends: 220 [2025-04-29 11:25:36,812 INFO L226 Difference]: Without dead ends: 220 [2025-04-29 11:25:36,812 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-04-29 11:25:36,813 INFO L437 NwaCegarLoop]: 217 mSDtfsCounter, 11 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-04-29 11:25:36,813 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 565 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-04-29 11:25:36,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2025-04-29 11:25:36,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2025-04-29 11:25:36,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 125 states have (on average 1.784) internal successors, (223), 210 states have internal predecessors, (223), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-04-29 11:25:36,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 235 transitions. [2025-04-29 11:25:36,826 INFO L79 Accepts]: Start accepts. Automaton has 220 states and 235 transitions. Word has length 19 [2025-04-29 11:25:36,826 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 11:25:36,826 INFO L485 AbstractCegarLoop]: Abstraction has 220 states and 235 transitions. [2025-04-29 11:25:36,826 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-04-29 11:25:36,826 INFO L278 IsEmpty]: Start isEmpty. Operand 220 states and 235 transitions. [2025-04-29 11:25:36,827 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2025-04-29 11:25:36,829 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:25:36,829 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, 1] [2025-04-29 11:25:36,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-04-29 11:25:37,029 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-04-29 11:25:37,030 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2025-04-29 11:25:37,030 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:25:37,030 INFO L85 PathProgramCache]: Analyzing trace with hash -374676825, now seen corresponding path program 1 times [2025-04-29 11:25:37,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:25:37,030 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019261275] [2025-04-29 11:25:37,030 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:37,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:25:37,050 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 66 statements into 1 equivalence classes. [2025-04-29 11:25:37,098 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 66 of 66 statements. [2025-04-29 11:25:37,098 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:37,098 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-29 11:25:37,105 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279621167] [2025-04-29 11:25:37,105 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:37,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:25:37,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:25:37,107 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) [2025-04-29 11:25:37,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-29 11:25:37,194 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 66 statements into 1 equivalence classes. [2025-04-29 11:25:37,251 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 66 of 66 statements. [2025-04-29 11:25:37,251 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:37,251 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:37,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 81 conjuncts are in the unsatisfiable core [2025-04-29 11:25:37,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:25:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2025-04-29 11:25:37,301 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-29 11:25:37,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:25:37,301 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019261275] [2025-04-29 11:25:37,301 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-29 11:25:37,301 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279621167] [2025-04-29 11:25:37,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279621167] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:25:37,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:25:37,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-29 11:25:37,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647082207] [2025-04-29 11:25:37,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:25:37,302 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-29 11:25:37,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:25:37,302 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-29 11:25:37,303 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-04-29 11:25:37,303 INFO L87 Difference]: Start difference. First operand 220 states and 235 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-04-29 11:25:37,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 11:25:37,337 INFO L93 Difference]: Finished difference Result 238 states and 253 transitions. [2025-04-29 11:25:37,337 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-29 11:25:37,337 INFO L79 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2025-04-29 11:25:37,337 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 11:25:37,338 INFO L225 Difference]: With dead ends: 238 [2025-04-29 11:25:37,338 INFO L226 Difference]: Without dead ends: 223 [2025-04-29 11:25:37,338 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-04-29 11:25:37,339 INFO L437 NwaCegarLoop]: 213 mSDtfsCounter, 2 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-04-29 11:25:37,339 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 624 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-04-29 11:25:37,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2025-04-29 11:25:37,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2025-04-29 11:25:37,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 128 states have (on average 1.765625) internal successors, (226), 213 states have internal predecessors, (226), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-04-29 11:25:37,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 238 transitions. [2025-04-29 11:25:37,348 INFO L79 Accepts]: Start accepts. Automaton has 223 states and 238 transitions. Word has length 66 [2025-04-29 11:25:37,348 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 11:25:37,348 INFO L485 AbstractCegarLoop]: Abstraction has 223 states and 238 transitions. [2025-04-29 11:25:37,348 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-04-29 11:25:37,348 INFO L278 IsEmpty]: Start isEmpty. Operand 223 states and 238 transitions. [2025-04-29 11:25:37,349 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-04-29 11:25:37,350 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:25:37,350 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:25:37,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-04-29 11:25:37,551 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:25:37,551 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2025-04-29 11:25:37,552 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:25:37,552 INFO L85 PathProgramCache]: Analyzing trace with hash -172967161, now seen corresponding path program 1 times [2025-04-29 11:25:37,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:25:37,552 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123562951] [2025-04-29 11:25:37,552 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:37,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:25:37,572 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-04-29 11:25:37,719 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-04-29 11:25:37,719 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:37,720 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-29 11:25:37,724 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066718553] [2025-04-29 11:25:37,726 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:37,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:25:37,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:25:37,728 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) [2025-04-29 11:25:37,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-04-29 11:25:37,804 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-04-29 11:25:37,877 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-04-29 11:25:37,877 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:37,877 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:37,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-04-29 11:25:37,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:25:37,915 INFO L354 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 [2025-04-29 11:25:37,942 INFO L354 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 [2025-04-29 11:25:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 58 proven. 14 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2025-04-29 11:25:38,005 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:25:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2025-04-29 11:25:38,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:25:38,177 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123562951] [2025-04-29 11:25:38,177 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-29 11:25:38,177 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066718553] [2025-04-29 11:25:38,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066718553] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:25:38,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-29 11:25:38,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2025-04-29 11:25:38,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720492700] [2025-04-29 11:25:38,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-29 11:25:38,178 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-04-29 11:25:38,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:25:38,178 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-04-29 11:25:38,178 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-04-29 11:25:38,179 INFO L87 Difference]: Start difference. First operand 223 states and 238 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2025-04-29 11:25:38,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 11:25:38,433 INFO L93 Difference]: Finished difference Result 248 states and 264 transitions. [2025-04-29 11:25:38,434 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-29 11:25:38,434 INFO L79 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 71 [2025-04-29 11:25:38,434 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 11:25:38,435 INFO L225 Difference]: With dead ends: 248 [2025-04-29 11:25:38,435 INFO L226 Difference]: Without dead ends: 228 [2025-04-29 11:25:38,435 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2025-04-29 11:25:38,436 INFO L437 NwaCegarLoop]: 209 mSDtfsCounter, 21 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-04-29 11:25:38,436 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1172 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-04-29 11:25:38,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2025-04-29 11:25:38,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2025-04-29 11:25:38,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 133 states have (on average 1.736842105263158) internal successors, (231), 218 states have internal predecessors, (231), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-04-29 11:25:38,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 243 transitions. [2025-04-29 11:25:38,440 INFO L79 Accepts]: Start accepts. Automaton has 228 states and 243 transitions. Word has length 71 [2025-04-29 11:25:38,440 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 11:25:38,440 INFO L485 AbstractCegarLoop]: Abstraction has 228 states and 243 transitions. [2025-04-29 11:25:38,440 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2025-04-29 11:25:38,441 INFO L278 IsEmpty]: Start isEmpty. Operand 228 states and 243 transitions. [2025-04-29 11:25:38,441 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2025-04-29 11:25:38,442 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:25:38,442 INFO L218 NwaCegarLoop]: trace histogram [18, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:25:38,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-04-29 11:25:38,642 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:25:38,642 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2025-04-29 11:25:38,643 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:25:38,643 INFO L85 PathProgramCache]: Analyzing trace with hash -676503001, now seen corresponding path program 2 times [2025-04-29 11:25:38,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:25:38,643 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273237042] [2025-04-29 11:25:38,643 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 11:25:38,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:25:38,668 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 84 statements into 2 equivalence classes. [2025-04-29 11:25:38,776 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 84 of 84 statements. [2025-04-29 11:25:38,776 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-29 11:25:38,776 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-29 11:25:38,780 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1231313441] [2025-04-29 11:25:38,780 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 11:25:38,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:25:38,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:25:38,782 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) [2025-04-29 11:25:38,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-04-29 11:25:38,882 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 84 statements into 2 equivalence classes. [2025-04-29 11:25:38,983 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 84 of 84 statements. [2025-04-29 11:25:38,983 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-29 11:25:38,983 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:38,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-04-29 11:25:38,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:25:39,008 INFO L354 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 [2025-04-29 11:25:39,024 INFO L354 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 [2025-04-29 11:25:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 95 proven. 3 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2025-04-29 11:25:39,085 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:25:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 15 proven. 91 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2025-04-29 11:25:39,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:25:39,239 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273237042] [2025-04-29 11:25:39,239 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-29 11:25:39,239 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231313441] [2025-04-29 11:25:39,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231313441] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:25:39,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-29 11:25:39,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2025-04-29 11:25:39,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746959302] [2025-04-29 11:25:39,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-29 11:25:39,240 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-04-29 11:25:39,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:25:39,240 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-04-29 11:25:39,240 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2025-04-29 11:25:39,241 INFO L87 Difference]: Start difference. First operand 228 states and 243 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2025-04-29 11:25:39,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 11:25:39,630 INFO L93 Difference]: Finished difference Result 248 states and 265 transitions. [2025-04-29 11:25:39,630 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-04-29 11:25:39,630 INFO L79 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 84 [2025-04-29 11:25:39,631 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 11:25:39,632 INFO L225 Difference]: With dead ends: 248 [2025-04-29 11:25:39,632 INFO L226 Difference]: Without dead ends: 233 [2025-04-29 11:25:39,632 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2025-04-29 11:25:39,633 INFO L437 NwaCegarLoop]: 207 mSDtfsCounter, 23 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-04-29 11:25:39,634 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 1081 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-04-29 11:25:39,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2025-04-29 11:25:39,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2025-04-29 11:25:39,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 138 states have (on average 1.710144927536232) internal successors, (236), 223 states have internal predecessors, (236), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-04-29 11:25:39,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 248 transitions. [2025-04-29 11:25:39,641 INFO L79 Accepts]: Start accepts. Automaton has 233 states and 248 transitions. Word has length 84 [2025-04-29 11:25:39,642 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 11:25:39,642 INFO L485 AbstractCegarLoop]: Abstraction has 233 states and 248 transitions. [2025-04-29 11:25:39,642 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2025-04-29 11:25:39,642 INFO L278 IsEmpty]: Start isEmpty. Operand 233 states and 248 transitions. [2025-04-29 11:25:39,643 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2025-04-29 11:25:39,644 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:25:39,644 INFO L218 NwaCegarLoop]: trace histogram [22, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:25:39,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-04-29 11:25:39,845 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:25:39,845 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2025-04-29 11:25:39,845 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:25:39,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1007488217, now seen corresponding path program 3 times [2025-04-29 11:25:39,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:25:39,845 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137711454] [2025-04-29 11:25:39,845 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-29 11:25:39,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:25:39,870 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 88 statements into 12 equivalence classes. [2025-04-29 11:25:40,065 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) and asserted 88 of 88 statements. [2025-04-29 11:25:40,065 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2025-04-29 11:25:40,065 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-29 11:25:40,071 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554723446] [2025-04-29 11:25:40,072 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-29 11:25:40,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:25:40,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:25:40,074 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) [2025-04-29 11:25:40,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-04-29 11:25:40,170 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 88 statements into 12 equivalence classes. [2025-04-29 11:25:40,187 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 88 statements. [2025-04-29 11:25:40,187 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-29 11:25:40,187 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:40,188 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-04-29 11:25:40,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:25:40,225 INFO L354 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 [2025-04-29 11:25:40,237 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2025-04-29 11:25:40,237 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-29 11:25:40,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:25:40,237 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137711454] [2025-04-29 11:25:40,237 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-29 11:25:40,237 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554723446] [2025-04-29 11:25:40,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554723446] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:25:40,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:25:40,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-29 11:25:40,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762572178] [2025-04-29 11:25:40,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:25:40,238 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-29 11:25:40,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:25:40,238 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-29 11:25:40,238 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-29 11:25:40,238 INFO L87 Difference]: Start difference. First operand 233 states and 248 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2025-04-29 11:25:40,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 11:25:40,327 INFO L93 Difference]: Finished difference Result 232 states and 247 transitions. [2025-04-29 11:25:40,327 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-29 11:25:40,328 INFO L79 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 88 [2025-04-29 11:25:40,328 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 11:25:40,329 INFO L225 Difference]: With dead ends: 232 [2025-04-29 11:25:40,329 INFO L226 Difference]: Without dead ends: 232 [2025-04-29 11:25:40,329 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-04-29 11:25:40,329 INFO L437 NwaCegarLoop]: 219 mSDtfsCounter, 11 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 572 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 [2025-04-29 11:25:40,329 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 572 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-04-29 11:25:40,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2025-04-29 11:25:40,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2025-04-29 11:25:40,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 138 states have (on average 1.7028985507246377) internal successors, (235), 222 states have internal predecessors, (235), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-04-29 11:25:40,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 247 transitions. [2025-04-29 11:25:40,335 INFO L79 Accepts]: Start accepts. Automaton has 232 states and 247 transitions. Word has length 88 [2025-04-29 11:25:40,336 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 11:25:40,336 INFO L485 AbstractCegarLoop]: Abstraction has 232 states and 247 transitions. [2025-04-29 11:25:40,336 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2025-04-29 11:25:40,336 INFO L278 IsEmpty]: Start isEmpty. Operand 232 states and 247 transitions. [2025-04-29 11:25:40,339 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2025-04-29 11:25:40,340 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:25:40,340 INFO L218 NwaCegarLoop]: trace histogram [25, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:25:40,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-04-29 11:25:40,541 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:25:40,541 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2025-04-29 11:25:40,541 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:25:40,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1484730428, now seen corresponding path program 1 times [2025-04-29 11:25:40,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:25:40,541 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764469678] [2025-04-29 11:25:40,543 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:40,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:25:40,564 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-04-29 11:25:40,596 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-04-29 11:25:40,596 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:40,596 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 259 proven. 27 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2025-04-29 11:25:41,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:25:41,291 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764469678] [2025-04-29 11:25:41,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764469678] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:25:41,291 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440431774] [2025-04-29 11:25:41,291 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:41,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:25:41,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:25:41,293 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) [2025-04-29 11:25:41,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-04-29 11:25:41,407 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-04-29 11:25:41,485 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-04-29 11:25:41,486 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:41,486 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:41,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-04-29 11:25:41,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:25:41,559 WARN L871 $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 [2025-04-29 11:25:41,599 INFO L325 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-04-29 11:25:41,600 INFO L354 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 [2025-04-29 11:25:41,611 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 259 proven. 1 refuted. 0 times theorem prover too weak. 299 trivial. 26 not checked. [2025-04-29 11:25:41,611 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:25:41,800 INFO L325 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-04-29 11:25:41,801 INFO L354 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 [2025-04-29 11:25:41,815 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 259 proven. 27 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2025-04-29 11:25:41,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440431774] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:25:41,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-29 11:25:41,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 16 [2025-04-29 11:25:41,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806895401] [2025-04-29 11:25:41,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-29 11:25:41,816 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-04-29 11:25:41,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:25:41,817 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-04-29 11:25:41,817 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=199, Unknown=1, NotChecked=28, Total=272 [2025-04-29 11:25:41,817 INFO L87 Difference]: Start difference. First operand 232 states and 247 transitions. Second operand has 17 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 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) [2025-04-29 11:25:42,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 11:25:42,282 INFO L93 Difference]: Finished difference Result 228 states and 243 transitions. [2025-04-29 11:25:42,283 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-29 11:25:42,283 INFO L79 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 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 98 [2025-04-29 11:25:42,283 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 11:25:42,284 INFO L225 Difference]: With dead ends: 228 [2025-04-29 11:25:42,284 INFO L226 Difference]: Without dead ends: 228 [2025-04-29 11:25:42,284 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 187 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=311, Unknown=1, NotChecked=36, Total=420 [2025-04-29 11:25:42,284 INFO L437 NwaCegarLoop]: 189 mSDtfsCounter, 19 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-04-29 11:25:42,284 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1282 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 795 Invalid, 0 Unknown, 204 Unchecked, 0.4s Time] [2025-04-29 11:25:42,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2025-04-29 11:25:42,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2025-04-29 11:25:42,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 138 states have (on average 1.673913043478261) internal successors, (231), 218 states have internal predecessors, (231), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-04-29 11:25:42,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 243 transitions. [2025-04-29 11:25:42,289 INFO L79 Accepts]: Start accepts. Automaton has 228 states and 243 transitions. Word has length 98 [2025-04-29 11:25:42,289 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 11:25:42,289 INFO L485 AbstractCegarLoop]: Abstraction has 228 states and 243 transitions. [2025-04-29 11:25:42,289 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 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) [2025-04-29 11:25:42,289 INFO L278 IsEmpty]: Start isEmpty. Operand 228 states and 243 transitions. [2025-04-29 11:25:42,290 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2025-04-29 11:25:42,290 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:25:42,290 INFO L218 NwaCegarLoop]: trace histogram [25, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:25:42,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-04-29 11:25:42,494 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:25:42,494 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2025-04-29 11:25:42,494 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:25:42,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1484730429, now seen corresponding path program 1 times [2025-04-29 11:25:42,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:25:42,494 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640724629] [2025-04-29 11:25:42,494 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:42,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:25:42,515 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-04-29 11:25:42,591 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-04-29 11:25:42,591 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:42,591 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-29 11:25:42,595 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288963540] [2025-04-29 11:25:42,595 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:42,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:25:42,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:25:42,597 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) [2025-04-29 11:25:42,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-04-29 11:25:42,714 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-04-29 11:25:42,934 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-04-29 11:25:42,934 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:42,935 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:42,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-04-29 11:25:42,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:25:43,105 WARN L871 $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 [2025-04-29 11:25:43,148 INFO L189 IndexEqualityManager]: detected not equals via solver [2025-04-29 11:25:43,148 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-04-29 11:25:43,156 INFO L325 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-04-29 11:25:43,156 INFO L354 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 [2025-04-29 11:25:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 259 proven. 0 refuted. 0 times theorem prover too weak. 299 trivial. 27 not checked. [2025-04-29 11:25:43,172 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:25:43,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:25:43,253 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640724629] [2025-04-29 11:25:43,253 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-29 11:25:43,253 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288963540] [2025-04-29 11:25:43,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288963540] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:25:43,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-04-29 11:25:43,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2025-04-29 11:25:43,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559643505] [2025-04-29 11:25:43,253 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-04-29 11:25:43,253 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-29 11:25:43,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:25:43,253 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-29 11:25:43,254 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=153, Unknown=1, NotChecked=24, Total=210 [2025-04-29 11:25:43,254 INFO L87 Difference]: Start difference. First operand 228 states and 243 transitions. Second operand has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2025-04-29 11:25:43,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 11:25:43,871 INFO L93 Difference]: Finished difference Result 224 states and 239 transitions. [2025-04-29 11:25:43,873 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-29 11:25:43,873 INFO L79 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 98 [2025-04-29 11:25:43,873 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 11:25:43,874 INFO L225 Difference]: With dead ends: 224 [2025-04-29 11:25:43,874 INFO L226 Difference]: Without dead ends: 224 [2025-04-29 11:25:43,874 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=328, Unknown=1, NotChecked=36, Total=420 [2025-04-29 11:25:43,874 INFO L437 NwaCegarLoop]: 180 mSDtfsCounter, 16 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-04-29 11:25:43,875 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1151 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1082 Invalid, 0 Unknown, 199 Unchecked, 0.5s Time] [2025-04-29 11:25:43,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2025-04-29 11:25:43,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2025-04-29 11:25:43,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 138 states have (on average 1.644927536231884) internal successors, (227), 214 states have internal predecessors, (227), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-04-29 11:25:43,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 239 transitions. [2025-04-29 11:25:43,879 INFO L79 Accepts]: Start accepts. Automaton has 224 states and 239 transitions. Word has length 98 [2025-04-29 11:25:43,879 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 11:25:43,879 INFO L485 AbstractCegarLoop]: Abstraction has 224 states and 239 transitions. [2025-04-29 11:25:43,879 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2025-04-29 11:25:43,879 INFO L278 IsEmpty]: Start isEmpty. Operand 224 states and 239 transitions. [2025-04-29 11:25:43,880 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2025-04-29 11:25:43,880 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:25:43,880 INFO L218 NwaCegarLoop]: trace histogram [25, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:25:43,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-04-29 11:25:44,080 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-04-29 11:25:44,080 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2025-04-29 11:25:44,081 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:25:44,081 INFO L85 PathProgramCache]: Analyzing trace with hash 2030973326, now seen corresponding path program 1 times [2025-04-29 11:25:44,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:25:44,081 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848276993] [2025-04-29 11:25:44,081 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:44,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:25:44,103 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 101 statements into 1 equivalence classes. [2025-04-29 11:25:44,117 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 101 of 101 statements. [2025-04-29 11:25:44,117 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:44,117 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:44,450 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2025-04-29 11:25:44,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:25:44,451 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848276993] [2025-04-29 11:25:44,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848276993] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:25:44,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:25:44,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-04-29 11:25:44,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602057382] [2025-04-29 11:25:44,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:25:44,451 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-04-29 11:25:44,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:25:44,452 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-04-29 11:25:44,452 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-04-29 11:25:44,452 INFO L87 Difference]: Start difference. First operand 224 states and 239 transitions. Second operand has 9 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2025-04-29 11:25:44,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 11:25:44,683 INFO L93 Difference]: Finished difference Result 223 states and 238 transitions. [2025-04-29 11:25:44,683 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-29 11:25:44,684 INFO L79 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 101 [2025-04-29 11:25:44,684 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 11:25:44,685 INFO L225 Difference]: With dead ends: 223 [2025-04-29 11:25:44,685 INFO L226 Difference]: Without dead ends: 223 [2025-04-29 11:25:44,685 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-04-29 11:25:44,685 INFO L437 NwaCegarLoop]: 192 mSDtfsCounter, 9 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-04-29 11:25:44,685 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1000 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-04-29 11:25:44,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2025-04-29 11:25:44,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2025-04-29 11:25:44,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 138 states have (on average 1.6376811594202898) internal successors, (226), 213 states have internal predecessors, (226), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-04-29 11:25:44,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 238 transitions. [2025-04-29 11:25:44,689 INFO L79 Accepts]: Start accepts. Automaton has 223 states and 238 transitions. Word has length 101 [2025-04-29 11:25:44,689 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 11:25:44,690 INFO L485 AbstractCegarLoop]: Abstraction has 223 states and 238 transitions. [2025-04-29 11:25:44,690 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2025-04-29 11:25:44,690 INFO L278 IsEmpty]: Start isEmpty. Operand 223 states and 238 transitions. [2025-04-29 11:25:44,690 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2025-04-29 11:25:44,690 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:25:44,690 INFO L218 NwaCegarLoop]: trace histogram [25, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:25:44,690 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-04-29 11:25:44,690 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2025-04-29 11:25:44,691 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:25:44,691 INFO L85 PathProgramCache]: Analyzing trace with hash 2030973327, now seen corresponding path program 1 times [2025-04-29 11:25:44,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:25:44,691 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646197409] [2025-04-29 11:25:44,691 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:44,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:25:44,711 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 101 statements into 1 equivalence classes. [2025-04-29 11:25:44,744 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 101 of 101 statements. [2025-04-29 11:25:44,745 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:44,745 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:45,781 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 259 proven. 37 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2025-04-29 11:25:45,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:25:45,782 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646197409] [2025-04-29 11:25:45,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646197409] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:25:45,782 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479591612] [2025-04-29 11:25:45,782 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:45,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:25:45,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:25:45,784 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) [2025-04-29 11:25:45,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-04-29 11:25:45,919 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 101 statements into 1 equivalence classes. [2025-04-29 11:25:46,110 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 101 of 101 statements. [2025-04-29 11:25:46,110 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:46,110 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:46,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 78 conjuncts are in the unsatisfiable core [2025-04-29 11:25:46,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:25:46,282 INFO L354 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 [2025-04-29 11:26:07,721 WARN L871 $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 [2025-04-29 11:26:07,965 INFO L189 IndexEqualityManager]: detected not equals via solver [2025-04-29 11:26:07,966 INFO L354 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 [2025-04-29 11:26:07,973 INFO L325 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-04-29 11:26:07,973 INFO L354 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 [2025-04-29 11:26:08,011 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 191 proven. 255 refuted. 0 times theorem prover too weak. 132 trivial. 7 not checked. [2025-04-29 11:26:08,012 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:26:08,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479591612] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:26:08,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-29 11:26:08,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 44 [2025-04-29 11:26:08,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144654312] [2025-04-29 11:26:08,144 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-29 11:26:08,145 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-04-29 11:26:08,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:26:08,145 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-04-29 11:26:08,146 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1845, Unknown=6, NotChecked=86, Total=2070 [2025-04-29 11:26:08,146 INFO L87 Difference]: Start difference. First operand 223 states and 238 transitions. Second operand has 44 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 39 states have internal predecessors, (80), 3 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2025-04-29 11:26:12,182 WARN L532 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] [2025-04-29 11:26:18,730 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-04-29 11:26:22,847 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-04-29 11:26:27,419 WARN L532 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] [2025-04-29 11:26:28,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 11:26:28,339 INFO L93 Difference]: Finished difference Result 244 states and 271 transitions. [2025-04-29 11:26:28,339 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-04-29 11:26:28,339 INFO L79 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 39 states have internal predecessors, (80), 3 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 101 [2025-04-29 11:26:28,339 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 11:26:28,341 INFO L225 Difference]: With dead ends: 244 [2025-04-29 11:26:28,341 INFO L226 Difference]: Without dead ends: 241 [2025-04-29 11:26:28,342 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=242, Invalid=2948, Unknown=6, NotChecked=110, Total=3306 [2025-04-29 11:26:28,342 INFO L437 NwaCegarLoop]: 200 mSDtfsCounter, 20 mSDsluCounter, 3154 mSDsCounter, 0 mSdLazyCounter, 2406 mSolverCounterSat, 13 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 3354 SdHoareTripleChecker+Invalid, 2651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2406 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 17.8s IncrementalHoareTripleChecker+Time [2025-04-29 11:26:28,342 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 3354 Invalid, 2651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2406 Invalid, 4 Unknown, 228 Unchecked, 17.8s Time] [2025-04-29 11:26:28,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2025-04-29 11:26:28,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 229. [2025-04-29 11:26:28,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 143 states have (on average 1.6223776223776223) internal successors, (232), 219 states have internal predecessors, (232), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2025-04-29 11:26:28,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 247 transitions. [2025-04-29 11:26:28,347 INFO L79 Accepts]: Start accepts. Automaton has 229 states and 247 transitions. Word has length 101 [2025-04-29 11:26:28,348 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 11:26:28,348 INFO L485 AbstractCegarLoop]: Abstraction has 229 states and 247 transitions. [2025-04-29 11:26:28,348 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 39 states have internal predecessors, (80), 3 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2025-04-29 11:26:28,348 INFO L278 IsEmpty]: Start isEmpty. Operand 229 states and 247 transitions. [2025-04-29 11:26:28,348 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2025-04-29 11:26:28,348 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:26:28,349 INFO L218 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:28,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-04-29 11:26:28,549 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:28,549 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2025-04-29 11:26:28,550 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:28,550 INFO L85 PathProgramCache]: Analyzing trace with hash 341219859, now seen corresponding path program 2 times [2025-04-29 11:26:28,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:26:28,550 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015654799] [2025-04-29 11:26:28,550 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 11:26:28,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:26:28,569 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 102 statements into 2 equivalence classes. [2025-04-29 11:26:28,619 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 102 of 102 statements. [2025-04-29 11:26:28,619 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-29 11:26:28,619 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:29,693 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 281 proven. 46 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2025-04-29 11:26:29,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:26:29,693 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015654799] [2025-04-29 11:26:29,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015654799] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:26:29,693 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644794599] [2025-04-29 11:26:29,693 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 11:26:29,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:29,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:29,695 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-29 11:26:29,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-04-29 11:26:29,829 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 102 statements into 2 equivalence classes. [2025-04-29 11:26:30,001 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 102 of 102 statements. [2025-04-29 11:26:30,001 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-29 11:26:30,001 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:30,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 67 conjuncts are in the unsatisfiable core [2025-04-29 11:26:30,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:30,111 INFO L354 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 [2025-04-29 11:26:39,459 WARN L871 $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 [2025-04-29 11:26:39,502 INFO L189 IndexEqualityManager]: detected not equals via solver [2025-04-29 11:26:39,503 INFO L354 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 [2025-04-29 11:26:39,509 INFO L325 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-04-29 11:26:39,509 INFO L354 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 [2025-04-29 11:26:39,575 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 227 proven. 156 refuted. 0 times theorem prover too weak. 178 trivial. 55 not checked. [2025-04-29 11:26:39,575 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:26:39,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644794599] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:26:39,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-29 11:26:39,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25] total 41 [2025-04-29 11:26:39,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597250382] [2025-04-29 11:26:39,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-29 11:26:39,660 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-04-29 11:26:39,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:26:39,661 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-04-29 11:26:39,661 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1602, Unknown=3, NotChecked=80, Total=1806 [2025-04-29 11:26:39,661 INFO L87 Difference]: Start difference. First operand 229 states and 247 transitions. Second operand has 41 states, 39 states have (on average 2.0) internal successors, (78), 36 states have internal predecessors, (78), 3 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2025-04-29 11:26:43,691 WARN L532 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] Killed by 15