./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/memsafety/test-0236.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-0236.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 43eb95d7b6186177f5e1e7e57078b9322da9ee5b454a4abfa3ecfda7181762d4 --- Real Ultimate output --- This is Ultimate 0.3.0-wip.fs.system-includes-da04345-m [2025-04-29 11:25:09,535 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-29 11:25:09,585 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-04-29 11:25:09,588 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-29 11:25:09,589 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-29 11:25:09,606 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-29 11:25:09,607 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-29 11:25:09,607 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-29 11:25:09,607 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-29 11:25:09,607 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-29 11:25:09,607 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-29 11:25:09,607 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-29 11:25:09,608 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-29 11:25:09,608 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-29 11:25:09,608 INFO L153 SettingsManager]: * Use SBE=true [2025-04-29 11:25:09,608 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-29 11:25:09,608 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-29 11:25:09,608 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-29 11:25:09,608 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-29 11:25:09,608 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-29 11:25:09,608 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-04-29 11:25:09,608 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-04-29 11:25:09,609 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-04-29 11:25:09,609 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-29 11:25:09,609 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-04-29 11:25:09,609 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-04-29 11:25:09,609 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-29 11:25:09,609 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-29 11:25:09,609 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-29 11:25:09,609 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-29 11:25:09,609 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-29 11:25:09,609 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-29 11:25:09,609 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-29 11:25:09,609 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-29 11:25:09,610 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-29 11:25:09,610 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-29 11:25:09,610 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-29 11:25:09,610 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-29 11:25:09,610 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-29 11:25:09,610 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-29 11:25:09,610 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-29 11:25:09,610 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-29 11:25:09,610 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-29 11:25:09,610 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-29 11:25:09,611 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-29 11:25:09,611 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-29 11:25:09,611 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 -> 43eb95d7b6186177f5e1e7e57078b9322da9ee5b454a4abfa3ecfda7181762d4 [2025-04-29 11:25:09,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-29 11:25:09,843 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-29 11:25:09,845 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-29 11:25:09,845 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-29 11:25:09,846 INFO L274 PluginConnector]: CDTParser initialized [2025-04-29 11:25:09,847 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety/test-0236.c [2025-04-29 11:25:11,105 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1f72a44a/6956aa95f56b4628baaab6ca9b5a35a0/FLAG99e696ee5 [2025-04-29 11:25:11,319 INFO L389 CDTParser]: Found 1 translation units. [2025-04-29 11:25:11,319 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/memsafety/test-0236.c [2025-04-29 11:25:11,320 WARN L117 ultiparseSymbolTable]: System include assert.h could not be resolved by CDT -- only built-in system includes are available. [2025-04-29 11:25:11,320 WARN L117 ultiparseSymbolTable]: System include stdlib.h could not be resolved by CDT -- only built-in system includes are available. [2025-04-29 11:25:11,321 WARN L117 ultiparseSymbolTable]: System include string.h could not be resolved by CDT -- only built-in system includes are available. [2025-04-29 11:25:11,333 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1f72a44a/6956aa95f56b4628baaab6ca9b5a35a0/FLAG99e696ee5 [2025-04-29 11:25:12,155 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1f72a44a/6956aa95f56b4628baaab6ca9b5a35a0 [2025-04-29 11:25:12,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-29 11:25:12,158 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-04-29 11:25:12,159 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-29 11:25:12,159 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-29 11:25:12,161 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-29 11:25:12,162 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.04 11:25:12" (1/1) ... [2025-04-29 11:25:12,162 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7735c9a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:12, skipping insertion in model container [2025-04-29 11:25:12,162 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.04 11:25:12" (1/1) ... [2025-04-29 11:25:12,179 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-29 11:25:12,330 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 11:25:12,362 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-29 11:25:12,374 INFO L200 MainTranslator]: Completed pre-run [2025-04-29 11:25:12,405 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-29 11:25:12,422 INFO L204 MainTranslator]: Completed translation [2025-04-29 11:25:12,422 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:12 WrapperNode [2025-04-29 11:25:12,423 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-29 11:25:12,423 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-29 11:25:12,423 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-29 11:25:12,423 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-29 11:25:12,429 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:12" (1/1) ... [2025-04-29 11:25:12,440 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:12" (1/1) ... [2025-04-29 11:25:12,467 INFO L138 Inliner]: procedures = 25, calls = 63, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 206 [2025-04-29 11:25:12,468 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-29 11:25:12,468 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-29 11:25:12,469 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-29 11:25:12,469 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-29 11:25:12,476 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:12" (1/1) ... [2025-04-29 11:25:12,476 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:12" (1/1) ... [2025-04-29 11:25:12,483 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:12" (1/1) ... [2025-04-29 11:25:12,517 INFO L175 MemorySlicer]: Split 36 memory accesses to 1 slices as follows [36]. 100 percent of accesses are in the largest equivalence class. The 1 initializations are split as follows [1]. The 18 writes are split as follows [18]. [2025-04-29 11:25:12,518 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:12" (1/1) ... [2025-04-29 11:25:12,518 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:12" (1/1) ... [2025-04-29 11:25:12,527 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:12" (1/1) ... [2025-04-29 11:25:12,528 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:12" (1/1) ... [2025-04-29 11:25:12,530 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:12" (1/1) ... [2025-04-29 11:25:12,531 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:12" (1/1) ... [2025-04-29 11:25:12,532 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:12" (1/1) ... [2025-04-29 11:25:12,537 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-29 11:25:12,538 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-29 11:25:12,538 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-29 11:25:12,538 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-29 11:25:12,539 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:12" (1/1) ... [2025-04-29 11:25:12,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-29 11:25:12,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:25:12,566 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 11:25:12,569 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 11:25:12,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-04-29 11:25:12,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-29 11:25:12,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-04-29 11:25:12,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-04-29 11:25:12,586 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2025-04-29 11:25:12,587 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2025-04-29 11:25:12,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-04-29 11:25:12,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-29 11:25:12,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-29 11:25:12,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-04-29 11:25:12,666 INFO L234 CfgBuilder]: Building ICFG [2025-04-29 11:25:12,668 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-29 11:25:13,066 INFO L? ?]: Removed 220 outVars from TransFormulas that were not future-live. [2025-04-29 11:25:13,066 INFO L283 CfgBuilder]: Performing block encoding [2025-04-29 11:25:13,075 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-29 11:25:13,075 INFO L312 CfgBuilder]: Removed 10 assume(true) statements. [2025-04-29 11:25:13,075 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.04 11:25:13 BoogieIcfgContainer [2025-04-29 11:25:13,075 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-29 11:25:13,076 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-29 11:25:13,077 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-29 11:25:13,079 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-29 11:25:13,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.04 11:25:12" (1/3) ... [2025-04-29 11:25:13,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2022782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.04 11:25:13, skipping insertion in model container [2025-04-29 11:25:13,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:25:12" (2/3) ... [2025-04-29 11:25:13,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2022782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.04 11:25:13, skipping insertion in model container [2025-04-29 11:25:13,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.04 11:25:13" (3/3) ... [2025-04-29 11:25:13,081 INFO L128 eAbstractionObserver]: Analyzing ICFG test-0236.c [2025-04-29 11:25:13,091 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-29 11:25:13,092 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG test-0236.c that has 2 procedures, 208 locations, 240 edges, 1 initial locations, 11 loop locations, and 89 error locations. [2025-04-29 11:25:13,124 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-29 11:25:13,133 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;@4d21bcc5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-29 11:25:13,133 INFO L341 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2025-04-29 11:25:13,136 INFO L278 IsEmpty]: Start isEmpty. Operand has 208 states, 111 states have (on average 2.0) internal successors, (222), 200 states have internal predecessors, (222), 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 11:25:13,140 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2025-04-29 11:25:13,140 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:25:13,140 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2025-04-29 11:25:13,140 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-04-29 11:25:13,143 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:25:13,144 INFO L85 PathProgramCache]: Analyzing trace with hash 930662, now seen corresponding path program 1 times [2025-04-29 11:25:13,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:25:13,149 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772041009] [2025-04-29 11:25:13,150 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:13,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:25:13,196 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-29 11:25:13,203 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-29 11:25:13,203 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:13,203 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:13,229 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 11:25:13,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:25:13,230 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772041009] [2025-04-29 11:25:13,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772041009] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:25:13,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:25:13,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-29 11:25:13,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644183880] [2025-04-29 11:25:13,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:25:13,234 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-04-29 11:25:13,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:25:13,250 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-04-29 11:25:13,251 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-04-29 11:25:13,252 INFO L87 Difference]: Start difference. First operand has 208 states, 111 states have (on average 2.0) internal successors, (222), 200 states have internal predecessors, (222), 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 11:25:13,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 11:25:13,275 INFO L93 Difference]: Finished difference Result 208 states and 223 transitions. [2025-04-29 11:25:13,276 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-29 11:25:13,276 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 11:25:13,277 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 11:25:13,283 INFO L225 Difference]: With dead ends: 208 [2025-04-29 11:25:13,283 INFO L226 Difference]: Without dead ends: 206 [2025-04-29 11:25:13,285 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 11:25:13,288 INFO L437 NwaCegarLoop]: 223 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, 223 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 11:25:13,289 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-04-29 11:25:13,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2025-04-29 11:25:13,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2025-04-29 11:25:13,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 110 states have (on average 1.9) internal successors, (209), 198 states have internal predecessors, (209), 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 11:25:13,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 221 transitions. [2025-04-29 11:25:13,335 INFO L79 Accepts]: Start accepts. Automaton has 206 states and 221 transitions. Word has length 4 [2025-04-29 11:25:13,335 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 11:25:13,335 INFO L485 AbstractCegarLoop]: Abstraction has 206 states and 221 transitions. [2025-04-29 11:25:13,336 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 11:25:13,336 INFO L278 IsEmpty]: Start isEmpty. Operand 206 states and 221 transitions. [2025-04-29 11:25:13,336 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-04-29 11:25:13,336 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:25:13,336 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-04-29 11:25:13,336 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-29 11:25:13,336 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-04-29 11:25:13,337 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:25:13,337 INFO L85 PathProgramCache]: Analyzing trace with hash 889859499, now seen corresponding path program 1 times [2025-04-29 11:25:13,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:25:13,337 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285666590] [2025-04-29 11:25:13,337 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:13,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:25:13,343 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-29 11:25:13,359 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-29 11:25:13,360 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:13,360 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:13,458 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 11:25:13,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:25:13,459 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285666590] [2025-04-29 11:25:13,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285666590] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:25:13,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:25:13,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-29 11:25:13,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23415566] [2025-04-29 11:25:13,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:25:13,459 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-29 11:25:13,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:25:13,460 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-29 11:25:13,460 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-29 11:25:13,460 INFO L87 Difference]: Start difference. First operand 206 states and 221 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 11:25:13,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 11:25:13,643 INFO L93 Difference]: Finished difference Result 205 states and 220 transitions. [2025-04-29 11:25:13,643 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-29 11:25:13,643 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 11:25:13,643 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 11:25:13,644 INFO L225 Difference]: With dead ends: 205 [2025-04-29 11:25:13,644 INFO L226 Difference]: Without dead ends: 205 [2025-04-29 11:25:13,645 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 11:25:13,645 INFO L437 NwaCegarLoop]: 215 mSDtfsCounter, 4 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-04-29 11:25:13,645 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 345 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-04-29 11:25:13,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2025-04-29 11:25:13,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2025-04-29 11:25:13,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 110 states have (on average 1.8909090909090909) internal successors, (208), 197 states have internal predecessors, (208), 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 11:25:13,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 220 transitions. [2025-04-29 11:25:13,654 INFO L79 Accepts]: Start accepts. Automaton has 205 states and 220 transitions. Word has length 6 [2025-04-29 11:25:13,654 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 11:25:13,654 INFO L485 AbstractCegarLoop]: Abstraction has 205 states and 220 transitions. [2025-04-29 11:25:13,655 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 11:25:13,655 INFO L278 IsEmpty]: Start isEmpty. Operand 205 states and 220 transitions. [2025-04-29 11:25:13,655 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-04-29 11:25:13,655 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:25:13,655 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:25:13,655 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-29 11:25:13,655 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-04-29 11:25:13,656 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:25:13,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1815841040, now seen corresponding path program 1 times [2025-04-29 11:25:13,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:25:13,656 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132023660] [2025-04-29 11:25:13,656 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:13,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:25:13,662 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-29 11:25:13,670 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-29 11:25:13,670 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:13,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-29 11:25:13,674 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008181425] [2025-04-29 11:25:13,674 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:13,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:25:13,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:25:13,676 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 11:25:13,678 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 11:25:13,715 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-29 11:25:13,724 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-29 11:25:13,724 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:13,724 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:13,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-04-29 11:25:13,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:25:13,796 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 11:25:13,818 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 11:25:13,818 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-29 11:25:13,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:25:13,818 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132023660] [2025-04-29 11:25:13,819 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-29 11:25:13,819 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008181425] [2025-04-29 11:25:13,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008181425] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:25:13,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:25:13,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-29 11:25:13,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59993284] [2025-04-29 11:25:13,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:25:13,819 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-29 11:25:13,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:25:13,819 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-29 11:25:13,819 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-29 11:25:13,820 INFO L87 Difference]: Start difference. First operand 205 states and 220 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 11:25:13,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 11:25:13,941 INFO L93 Difference]: Finished difference Result 214 states and 229 transitions. [2025-04-29 11:25:13,941 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-29 11:25:13,941 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 11:25:13,941 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 11:25:13,942 INFO L225 Difference]: With dead ends: 214 [2025-04-29 11:25:13,942 INFO L226 Difference]: Without dead ends: 214 [2025-04-29 11:25:13,942 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 11:25:13,943 INFO L437 NwaCegarLoop]: 210 mSDtfsCounter, 11 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-04-29 11:25:13,943 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 557 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-04-29 11:25:13,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2025-04-29 11:25:13,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2025-04-29 11:25:13,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 118 states have (on average 1.8389830508474576) internal successors, (217), 205 states have internal predecessors, (217), 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 11:25:13,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 229 transitions. [2025-04-29 11:25:13,951 INFO L79 Accepts]: Start accepts. Automaton has 214 states and 229 transitions. Word has length 7 [2025-04-29 11:25:13,951 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 11:25:13,951 INFO L485 AbstractCegarLoop]: Abstraction has 214 states and 229 transitions. [2025-04-29 11:25:13,951 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 11:25:13,951 INFO L278 IsEmpty]: Start isEmpty. Operand 214 states and 229 transitions. [2025-04-29 11:25:13,952 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2025-04-29 11:25:13,952 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:25:13,952 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 11:25:13,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-04-29 11:25:14,153 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 11:25:14,153 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-04-29 11:25:14,153 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:25:14,153 INFO L85 PathProgramCache]: Analyzing trace with hash -406000121, now seen corresponding path program 1 times [2025-04-29 11:25:14,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:25:14,154 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808405699] [2025-04-29 11:25:14,154 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:14,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:25:14,180 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 66 statements into 1 equivalence classes. [2025-04-29 11:25:14,242 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 66 of 66 statements. [2025-04-29 11:25:14,242 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:14,242 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-29 11:25:14,246 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898682100] [2025-04-29 11:25:14,247 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:14,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:25:14,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:25:14,248 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 11:25:14,250 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 11:25:14,331 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 66 statements into 1 equivalence classes. [2025-04-29 11:25:14,387 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 66 of 66 statements. [2025-04-29 11:25:14,387 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:14,387 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:14,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-04-29 11:25:14,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:25:14,428 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 11:25:14,463 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 11:25:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2025-04-29 11:25:14,524 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-29 11:25:14,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:25:14,525 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808405699] [2025-04-29 11:25:14,525 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-29 11:25:14,525 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898682100] [2025-04-29 11:25:14,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898682100] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:25:14,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:25:14,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-29 11:25:14,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897397849] [2025-04-29 11:25:14,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:25:14,527 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-29 11:25:14,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:25:14,528 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-29 11:25:14,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-29 11:25:14,528 INFO L87 Difference]: Start difference. First operand 214 states and 229 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2025-04-29 11:25:14,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 11:25:14,682 INFO L93 Difference]: Finished difference Result 226 states and 241 transitions. [2025-04-29 11:25:14,682 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-29 11:25:14,682 INFO L79 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 66 [2025-04-29 11:25:14,682 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 11:25:14,683 INFO L225 Difference]: With dead ends: 226 [2025-04-29 11:25:14,683 INFO L226 Difference]: Without dead ends: 216 [2025-04-29 11:25:14,683 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-04-29 11:25:14,684 INFO L437 NwaCegarLoop]: 215 mSDtfsCounter, 3 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-04-29 11:25:14,684 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 768 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-04-29 11:25:14,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2025-04-29 11:25:14,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2025-04-29 11:25:14,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 120 states have (on average 1.825) internal successors, (219), 207 states have internal predecessors, (219), 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 11:25:14,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 231 transitions. [2025-04-29 11:25:14,695 INFO L79 Accepts]: Start accepts. Automaton has 216 states and 231 transitions. Word has length 66 [2025-04-29 11:25:14,695 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 11:25:14,695 INFO L485 AbstractCegarLoop]: Abstraction has 216 states and 231 transitions. [2025-04-29 11:25:14,695 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2025-04-29 11:25:14,695 INFO L278 IsEmpty]: Start isEmpty. Operand 216 states and 231 transitions. [2025-04-29 11:25:14,696 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-04-29 11:25:14,696 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:25:14,696 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 11:25:14,703 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 11:25:14,897 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 11:25:14,897 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-04-29 11:25:14,897 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:25:14,897 INFO L85 PathProgramCache]: Analyzing trace with hash -746639036, now seen corresponding path program 1 times [2025-04-29 11:25:14,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:25:14,898 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257506573] [2025-04-29 11:25:14,898 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:14,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:25:14,916 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-04-29 11:25:15,071 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-04-29 11:25:15,071 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:15,071 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-29 11:25:15,078 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982194348] [2025-04-29 11:25:15,078 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:15,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:25:15,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:25:15,083 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 11:25:15,084 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 11:25:15,166 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-04-29 11:25:15,239 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-04-29 11:25:15,239 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:15,239 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:15,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-04-29 11:25:15,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:25:15,275 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 11:25:15,296 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 11:25:15,363 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 88 proven. 3 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2025-04-29 11:25:15,364 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:25:15,556 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2025-04-29 11:25:15,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:25:15,556 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257506573] [2025-04-29 11:25:15,556 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-29 11:25:15,557 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982194348] [2025-04-29 11:25:15,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982194348] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:25:15,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-29 11:25:15,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2025-04-29 11:25:15,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657552971] [2025-04-29 11:25:15,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-29 11:25:15,557 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-04-29 11:25:15,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:25:15,558 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-04-29 11:25:15,558 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-04-29 11:25:15,558 INFO L87 Difference]: Start difference. First operand 216 states and 231 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-04-29 11:25:15,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 11:25:15,876 INFO L93 Difference]: Finished difference Result 235 states and 251 transitions. [2025-04-29 11:25:15,876 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-29 11:25:15,877 INFO L79 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 71 [2025-04-29 11:25:15,877 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 11:25:15,878 INFO L225 Difference]: With dead ends: 235 [2025-04-29 11:25:15,878 INFO L226 Difference]: Without dead ends: 220 [2025-04-29 11:25:15,878 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2025-04-29 11:25:15,878 INFO L437 NwaCegarLoop]: 214 mSDtfsCounter, 13 mSDsluCounter, 1725 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1939 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-04-29 11:25:15,879 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1939 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-04-29 11:25:15,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2025-04-29 11:25:15,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2025-04-29 11:25:15,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 124 states have (on average 1.7983870967741935) internal successors, (223), 211 states have internal predecessors, (223), 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 11:25:15,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 235 transitions. [2025-04-29 11:25:15,884 INFO L79 Accepts]: Start accepts. Automaton has 220 states and 235 transitions. Word has length 71 [2025-04-29 11:25:15,884 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 11:25:15,884 INFO L485 AbstractCegarLoop]: Abstraction has 220 states and 235 transitions. [2025-04-29 11:25:15,884 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-04-29 11:25:15,884 INFO L278 IsEmpty]: Start isEmpty. Operand 220 states and 235 transitions. [2025-04-29 11:25:15,885 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2025-04-29 11:25:15,886 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:25:15,886 INFO L218 NwaCegarLoop]: trace histogram [20, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:25:15,897 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 11:25:16,086 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 11:25:16,086 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-04-29 11:25:16,087 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:25:16,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1199481415, now seen corresponding path program 2 times [2025-04-29 11:25:16,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:25:16,087 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954805108] [2025-04-29 11:25:16,087 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 11:25:16,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:25:16,110 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 86 statements into 2 equivalence classes. [2025-04-29 11:25:16,214 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 86 of 86 statements. [2025-04-29 11:25:16,214 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-29 11:25:16,214 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-29 11:25:16,222 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316106934] [2025-04-29 11:25:16,225 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 11:25:16,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:25:16,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:25:16,228 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 11:25:16,230 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 11:25:16,311 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 86 statements into 2 equivalence classes. [2025-04-29 11:25:16,464 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 86 of 86 statements. [2025-04-29 11:25:16,465 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-29 11:25:16,465 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:16,473 INFO L256 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-04-29 11:25:16,477 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:25:16,510 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 11:25:16,538 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 11:25:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 220 proven. 36 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2025-04-29 11:25:16,674 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:25:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 47 proven. 106 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2025-04-29 11:25:16,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:25:16,948 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954805108] [2025-04-29 11:25:16,948 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-29 11:25:16,948 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316106934] [2025-04-29 11:25:16,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316106934] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:25:16,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-29 11:25:16,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2025-04-29 11:25:16,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182003911] [2025-04-29 11:25:16,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-29 11:25:16,949 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-04-29 11:25:16,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:25:16,949 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-04-29 11:25:16,949 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2025-04-29 11:25:16,949 INFO L87 Difference]: Start difference. First operand 220 states and 235 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-04-29 11:25:17,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 11:25:17,655 INFO L93 Difference]: Finished difference Result 244 states and 265 transitions. [2025-04-29 11:25:17,655 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-04-29 11:25:17,655 INFO L79 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 86 [2025-04-29 11:25:17,655 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 11:25:17,656 INFO L225 Difference]: With dead ends: 244 [2025-04-29 11:25:17,656 INFO L226 Difference]: Without dead ends: 229 [2025-04-29 11:25:17,657 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=318, Invalid=942, Unknown=0, NotChecked=0, Total=1260 [2025-04-29 11:25:17,657 INFO L437 NwaCegarLoop]: 214 mSDtfsCounter, 31 mSDsluCounter, 2441 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 2655 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-04-29 11:25:17,657 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 2655 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-04-29 11:25:17,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2025-04-29 11:25:17,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2025-04-29 11:25:17,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 133 states have (on average 1.7593984962406015) internal successors, (234), 220 states have internal predecessors, (234), 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 11:25:17,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 246 transitions. [2025-04-29 11:25:17,668 INFO L79 Accepts]: Start accepts. Automaton has 229 states and 246 transitions. Word has length 86 [2025-04-29 11:25:17,668 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 11:25:17,668 INFO L485 AbstractCegarLoop]: Abstraction has 229 states and 246 transitions. [2025-04-29 11:25:17,668 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-04-29 11:25:17,668 INFO L278 IsEmpty]: Start isEmpty. Operand 229 states and 246 transitions. [2025-04-29 11:25:17,670 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2025-04-29 11:25:17,670 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:25:17,670 INFO L218 NwaCegarLoop]: trace histogram [50, 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 11:25:17,679 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 11:25:17,871 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 11:25:17,871 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-04-29 11:25:17,872 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:25:17,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1082205351, now seen corresponding path program 3 times [2025-04-29 11:25:17,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:25:17,872 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510886336] [2025-04-29 11:25:17,872 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-29 11:25:17,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:25:17,910 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 116 statements into 21 equivalence classes. [2025-04-29 11:25:18,407 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) and asserted 116 of 116 statements. [2025-04-29 11:25:18,407 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2025-04-29 11:25:18,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-29 11:25:18,413 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74271622] [2025-04-29 11:25:18,414 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-29 11:25:18,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:25:18,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:25:18,417 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 11:25:18,418 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 11:25:18,524 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 116 statements into 21 equivalence classes. [2025-04-29 11:25:18,543 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 116 statements. [2025-04-29 11:25:18,544 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-29 11:25:18,544 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:18,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-04-29 11:25:18,552 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:25:18,575 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 11:25:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1565 trivial. 0 not checked. [2025-04-29 11:25:18,585 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-29 11:25:18,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:25:18,585 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510886336] [2025-04-29 11:25:18,585 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-29 11:25:18,585 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74271622] [2025-04-29 11:25:18,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74271622] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:25:18,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:25:18,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-29 11:25:18,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817214599] [2025-04-29 11:25:18,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:25:18,586 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-29 11:25:18,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:25:18,586 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-29 11:25:18,586 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-29 11:25:18,586 INFO L87 Difference]: Start difference. First operand 229 states and 246 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 11:25:18,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 11:25:18,677 INFO L93 Difference]: Finished difference Result 228 states and 245 transitions. [2025-04-29 11:25:18,677 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-29 11:25:18,677 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 116 [2025-04-29 11:25:18,678 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 11:25:18,678 INFO L225 Difference]: With dead ends: 228 [2025-04-29 11:25:18,678 INFO L226 Difference]: Without dead ends: 228 [2025-04-29 11:25:18,679 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 113 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 11:25:18,679 INFO L437 NwaCegarLoop]: 222 mSDtfsCounter, 11 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-04-29 11:25:18,679 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 579 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-04-29 11:25:18,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2025-04-29 11:25:18,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2025-04-29 11:25:18,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 133 states have (on average 1.7518796992481203) internal successors, (233), 219 states have internal predecessors, (233), 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 11:25:18,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 245 transitions. [2025-04-29 11:25:18,683 INFO L79 Accepts]: Start accepts. Automaton has 228 states and 245 transitions. Word has length 116 [2025-04-29 11:25:18,684 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 11:25:18,684 INFO L485 AbstractCegarLoop]: Abstraction has 228 states and 245 transitions. [2025-04-29 11:25:18,684 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 11:25:18,684 INFO L278 IsEmpty]: Start isEmpty. Operand 228 states and 245 transitions. [2025-04-29 11:25:18,685 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2025-04-29 11:25:18,685 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:25:18,685 INFO L218 NwaCegarLoop]: trace histogram [52, 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 11:25:18,691 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 11:25:18,885 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 11:25:18,886 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-04-29 11:25:18,886 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:25:18,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1953439382, now seen corresponding path program 1 times [2025-04-29 11:25:18,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:25:18,886 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204155485] [2025-04-29 11:25:18,886 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:18,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:25:18,915 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 125 statements into 1 equivalence classes. [2025-04-29 11:25:18,952 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 125 of 125 statements. [2025-04-29 11:25:18,952 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:18,952 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:19,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 713 proven. 4 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2025-04-29 11:25:19,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:25:19,761 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204155485] [2025-04-29 11:25:19,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204155485] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:25:19,761 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912494227] [2025-04-29 11:25:19,761 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:19,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:25:19,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:25:19,764 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 11:25:19,765 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 11:25:19,888 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 125 statements into 1 equivalence classes. [2025-04-29 11:25:19,979 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 125 of 125 statements. [2025-04-29 11:25:19,979 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:19,979 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:19,983 INFO L256 TraceCheckSpWp]: Trace formula consists of 1077 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-04-29 11:25:19,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:25:20,045 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 11:25:20,078 INFO L325 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-04-29 11:25:20,078 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 11:25:20,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 677 proven. 1 refuted. 0 times theorem prover too weak. 1056 trivial. 39 not checked. [2025-04-29 11:25:20,090 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:25:20,274 INFO L325 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-04-29 11:25:20,274 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 11:25:20,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 677 proven. 40 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2025-04-29 11:25:20,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912494227] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:25:20,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-29 11:25:20,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 15 [2025-04-29 11:25:20,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393101214] [2025-04-29 11:25:20,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-29 11:25:20,290 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-29 11:25:20,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:25:20,290 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-29 11:25:20,290 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=172, Unknown=1, NotChecked=26, Total=240 [2025-04-29 11:25:20,290 INFO L87 Difference]: Start difference. First operand 228 states and 245 transitions. Second operand has 16 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2025-04-29 11:25:20,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 11:25:20,829 INFO L93 Difference]: Finished difference Result 224 states and 241 transitions. [2025-04-29 11:25:20,830 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-29 11:25:20,830 INFO L79 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 125 [2025-04-29 11:25:20,830 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 11:25:20,831 INFO L225 Difference]: With dead ends: 224 [2025-04-29 11:25:20,831 INFO L226 Difference]: Without dead ends: 224 [2025-04-29 11:25:20,831 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 242 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=277, Unknown=1, NotChecked=34, Total=380 [2025-04-29 11:25:20,832 INFO L437 NwaCegarLoop]: 192 mSDtfsCounter, 23 mSDsluCounter, 1214 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1406 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-04-29 11:25:20,832 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 1406 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 901 Invalid, 0 Unknown, 207 Unchecked, 0.4s Time] [2025-04-29 11:25:20,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2025-04-29 11:25:20,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2025-04-29 11:25:20,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 133 states have (on average 1.7218045112781954) internal successors, (229), 215 states have internal predecessors, (229), 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 11:25:20,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 241 transitions. [2025-04-29 11:25:20,838 INFO L79 Accepts]: Start accepts. Automaton has 224 states and 241 transitions. Word has length 125 [2025-04-29 11:25:20,838 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 11:25:20,839 INFO L485 AbstractCegarLoop]: Abstraction has 224 states and 241 transitions. [2025-04-29 11:25:20,839 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2025-04-29 11:25:20,839 INFO L278 IsEmpty]: Start isEmpty. Operand 224 states and 241 transitions. [2025-04-29 11:25:20,840 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2025-04-29 11:25:20,843 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:25:20,843 INFO L218 NwaCegarLoop]: trace histogram [52, 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 11:25:20,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-04-29 11:25:21,043 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 11:25:21,044 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-04-29 11:25:21,044 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:25:21,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1953439381, now seen corresponding path program 1 times [2025-04-29 11:25:21,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:25:21,044 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910707919] [2025-04-29 11:25:21,044 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:21,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:25:21,073 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 125 statements into 1 equivalence classes. [2025-04-29 11:25:21,179 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 125 of 125 statements. [2025-04-29 11:25:21,179 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:21,179 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-29 11:25:21,183 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367670929] [2025-04-29 11:25:21,183 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:21,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:25:21,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:25:21,185 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 11:25:21,186 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 11:25:21,335 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 125 statements into 1 equivalence classes. [2025-04-29 11:25:22,017 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 125 of 125 statements. [2025-04-29 11:25:22,017 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:22,017 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:22,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 1077 conjuncts, 100 conjuncts are in the unsatisfiable core [2025-04-29 11:25:22,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:25:22,091 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 11:25:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 617 proven. 540 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2025-04-29 11:25:22,775 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:25:22,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:25:22,899 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910707919] [2025-04-29 11:25:22,899 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-29 11:25:22,899 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367670929] [2025-04-29 11:25:22,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367670929] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:25:22,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-04-29 11:25:22,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2025-04-29 11:25:22,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948341811] [2025-04-29 11:25:22,899 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-04-29 11:25:22,900 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-04-29 11:25:22,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:25:22,900 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-04-29 11:25:22,900 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2025-04-29 11:25:22,901 INFO L87 Difference]: Start difference. First operand 224 states and 241 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-04-29 11:25:24,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 11:25:24,096 INFO L93 Difference]: Finished difference Result 241 states and 263 transitions. [2025-04-29 11:25:24,096 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-04-29 11:25:24,097 INFO L79 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 125 [2025-04-29 11:25:24,097 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 11:25:24,098 INFO L225 Difference]: With dead ends: 241 [2025-04-29 11:25:24,098 INFO L226 Difference]: Without dead ends: 231 [2025-04-29 11:25:24,098 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=1587, Unknown=0, NotChecked=0, Total=1722 [2025-04-29 11:25:24,099 INFO L437 NwaCegarLoop]: 208 mSDtfsCounter, 13 mSDsluCounter, 3092 mSDsCounter, 0 mSdLazyCounter, 1756 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3300 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-04-29 11:25:24,099 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3300 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1756 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-04-29 11:25:24,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2025-04-29 11:25:24,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2025-04-29 11:25:24,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 140 states have (on average 1.6857142857142857) internal successors, (236), 222 states have internal predecessors, (236), 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 11:25:24,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 248 transitions. [2025-04-29 11:25:24,103 INFO L79 Accepts]: Start accepts. Automaton has 231 states and 248 transitions. Word has length 125 [2025-04-29 11:25:24,103 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 11:25:24,103 INFO L485 AbstractCegarLoop]: Abstraction has 231 states and 248 transitions. [2025-04-29 11:25:24,103 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-04-29 11:25:24,103 INFO L278 IsEmpty]: Start isEmpty. Operand 231 states and 248 transitions. [2025-04-29 11:25:24,104 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2025-04-29 11:25:24,104 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:25:24,104 INFO L218 NwaCegarLoop]: trace histogram [57, 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 11:25:24,125 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 11:25:24,305 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 11:25:24,305 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-04-29 11:25:24,305 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:25:24,305 INFO L85 PathProgramCache]: Analyzing trace with hash -751965426, now seen corresponding path program 2 times [2025-04-29 11:25:24,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:25:24,305 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297313042] [2025-04-29 11:25:24,305 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 11:25:24,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:25:24,336 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 130 statements into 2 equivalence classes. [2025-04-29 11:25:24,461 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 130 of 130 statements. [2025-04-29 11:25:24,462 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-29 11:25:24,463 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-29 11:25:24,466 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1114480274] [2025-04-29 11:25:24,467 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 11:25:24,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:25:24,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:25:24,469 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 11:25:24,470 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 11:25:24,636 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 130 statements into 2 equivalence classes. [2025-04-29 11:25:25,090 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 130 of 130 statements. [2025-04-29 11:25:25,090 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-29 11:25:25,090 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:25,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 56 conjuncts are in the unsatisfiable core [2025-04-29 11:25:25,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:25:25,108 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 11:25:25,332 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 11:25:25,378 INFO L189 IndexEqualityManager]: detected not equals via solver [2025-04-29 11:25:25,379 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 11:25:25,383 INFO L325 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-04-29 11:25:25,383 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 11:25:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2073 backedges. 781 proven. 0 refuted. 0 times theorem prover too weak. 1249 trivial. 43 not checked. [2025-04-29 11:25:25,393 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:25:25,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:25:25,456 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297313042] [2025-04-29 11:25:25,456 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-29 11:25:25,456 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114480274] [2025-04-29 11:25:25,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114480274] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:25:25,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-04-29 11:25:25,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2025-04-29 11:25:25,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324654430] [2025-04-29 11:25:25,457 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-04-29 11:25:25,457 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-29 11:25:25,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:25:25,458 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-29 11:25:25,458 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=153, Unknown=1, NotChecked=24, Total=210 [2025-04-29 11:25:25,458 INFO L87 Difference]: Start difference. First operand 231 states and 248 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 11:25:26,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 11:25:26,027 INFO L93 Difference]: Finished difference Result 227 states and 244 transitions. [2025-04-29 11:25:26,027 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-29 11:25:26,028 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 130 [2025-04-29 11:25:26,028 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 11:25:26,029 INFO L225 Difference]: With dead ends: 227 [2025-04-29 11:25:26,029 INFO L226 Difference]: Without dead ends: 227 [2025-04-29 11:25:26,029 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 118 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 11:25:26,029 INFO L437 NwaCegarLoop]: 183 mSDtfsCounter, 16 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-04-29 11:25:26,030 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1077 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1189 Invalid, 0 Unknown, 202 Unchecked, 0.4s Time] [2025-04-29 11:25:26,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2025-04-29 11:25:26,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2025-04-29 11:25:26,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 140 states have (on average 1.6571428571428573) internal successors, (232), 218 states have internal predecessors, (232), 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 11:25:26,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 244 transitions. [2025-04-29 11:25:26,038 INFO L79 Accepts]: Start accepts. Automaton has 227 states and 244 transitions. Word has length 130 [2025-04-29 11:25:26,038 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 11:25:26,038 INFO L485 AbstractCegarLoop]: Abstraction has 227 states and 244 transitions. [2025-04-29 11:25:26,038 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 11:25:26,038 INFO L278 IsEmpty]: Start isEmpty. Operand 227 states and 244 transitions. [2025-04-29 11:25:26,039 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2025-04-29 11:25:26,039 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:25:26,039 INFO L218 NwaCegarLoop]: trace histogram [57, 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 11:25:26,053 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 11:25:26,239 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 11:25:26,239 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-04-29 11:25:26,240 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:25:26,240 INFO L85 PathProgramCache]: Analyzing trace with hash 747387165, now seen corresponding path program 1 times [2025-04-29 11:25:26,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:25:26,240 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448608459] [2025-04-29 11:25:26,240 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:26,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:25:26,272 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 133 statements into 1 equivalence classes. [2025-04-29 11:25:26,294 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 133 of 133 statements. [2025-04-29 11:25:26,295 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:26,295 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:26,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2073 backedges. 215 proven. 0 refuted. 0 times theorem prover too weak. 1858 trivial. 0 not checked. [2025-04-29 11:25:26,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:25:26,764 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448608459] [2025-04-29 11:25:26,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448608459] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:25:26,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:25:26,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-04-29 11:25:26,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76244262] [2025-04-29 11:25:26,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:25:26,765 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-04-29 11:25:26,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:25:26,765 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-04-29 11:25:26,765 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-04-29 11:25:26,765 INFO L87 Difference]: Start difference. First operand 227 states and 244 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 11:25:27,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 11:25:27,027 INFO L93 Difference]: Finished difference Result 226 states and 243 transitions. [2025-04-29 11:25:27,027 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-29 11:25:27,028 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 133 [2025-04-29 11:25:27,028 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 11:25:27,029 INFO L225 Difference]: With dead ends: 226 [2025-04-29 11:25:27,029 INFO L226 Difference]: Without dead ends: 226 [2025-04-29 11:25:27,029 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 11:25:27,029 INFO L437 NwaCegarLoop]: 195 mSDtfsCounter, 9 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-04-29 11:25:27,029 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1010 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-04-29 11:25:27,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2025-04-29 11:25:27,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2025-04-29 11:25:27,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 140 states have (on average 1.65) internal successors, (231), 217 states have internal predecessors, (231), 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 11:25:27,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 243 transitions. [2025-04-29 11:25:27,037 INFO L79 Accepts]: Start accepts. Automaton has 226 states and 243 transitions. Word has length 133 [2025-04-29 11:25:27,038 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 11:25:27,038 INFO L485 AbstractCegarLoop]: Abstraction has 226 states and 243 transitions. [2025-04-29 11:25:27,038 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 11:25:27,038 INFO L278 IsEmpty]: Start isEmpty. Operand 226 states and 243 transitions. [2025-04-29 11:25:27,038 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2025-04-29 11:25:27,038 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:25:27,038 INFO L218 NwaCegarLoop]: trace histogram [57, 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 11:25:27,038 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-04-29 11:25:27,039 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-04-29 11:25:27,039 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:25:27,039 INFO L85 PathProgramCache]: Analyzing trace with hash 747387166, now seen corresponding path program 1 times [2025-04-29 11:25:27,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:25:27,039 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652056] [2025-04-29 11:25:27,039 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:27,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:25:27,085 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 133 statements into 1 equivalence classes. [2025-04-29 11:25:27,133 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 133 of 133 statements. [2025-04-29 11:25:27,134 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:27,134 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2073 backedges. 781 proven. 109 refuted. 0 times theorem prover too weak. 1183 trivial. 0 not checked. [2025-04-29 11:25:29,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:25:29,100 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652056] [2025-04-29 11:25:29,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652056] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:25:29,100 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270713663] [2025-04-29 11:25:29,100 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:29,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:25:29,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:25:29,102 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 11:25:29,102 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 11:25:29,281 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 133 statements into 1 equivalence classes. [2025-04-29 11:25:30,340 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 133 of 133 statements. [2025-04-29 11:25:30,340 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:30,340 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:30,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 137 conjuncts are in the unsatisfiable core [2025-04-29 11:25:30,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:25:30,606 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 11:25:40,332 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 11:25:40,365 INFO L189 IndexEqualityManager]: detected not equals via solver [2025-04-29 11:25:40,366 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 11:25:40,372 INFO L325 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-04-29 11:25:40,372 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 11:25:40,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2073 backedges. 508 proven. 1220 refuted. 0 times theorem prover too weak. 206 trivial. 139 not checked. [2025-04-29 11:25:40,421 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:25:40,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270713663] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:25:40,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-29 11:25:40,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 36] total 58 [2025-04-29 11:25:40,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753531803] [2025-04-29 11:25:40,556 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-29 11:25:40,556 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2025-04-29 11:25:40,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:25:40,557 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2025-04-29 11:25:40,557 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=3247, Unknown=1, NotChecked=114, Total=3540 [2025-04-29 11:25:40,558 INFO L87 Difference]: Start difference. First operand 226 states and 243 transitions. Second operand has 58 states, 56 states have (on average 1.7142857142857142) internal successors, (96), 53 states have internal predecessors, (96), 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 11:25:44,589 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 11:25:48,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 11:25:48,198 INFO L93 Difference]: Finished difference Result 246 states and 271 transitions. [2025-04-29 11:25:48,198 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-04-29 11:25:48,198 INFO L79 Accepts]: Start accepts. Automaton has has 58 states, 56 states have (on average 1.7142857142857142) internal successors, (96), 53 states have internal predecessors, (96), 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 133 [2025-04-29 11:25:48,199 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 11:25:48,200 INFO L225 Difference]: With dead ends: 246 [2025-04-29 11:25:48,200 INFO L226 Difference]: Without dead ends: 243 [2025-04-29 11:25:48,201 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=394, Invalid=6089, Unknown=1, NotChecked=158, Total=6642 [2025-04-29 11:25:48,202 INFO L437 NwaCegarLoop]: 200 mSDtfsCounter, 21 mSDsluCounter, 4591 mSDsCounter, 0 mSdLazyCounter, 3750 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 4791 SdHoareTripleChecker+Invalid, 3971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 3750 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2025-04-29 11:25:48,202 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 4791 Invalid, 3971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 3750 Invalid, 1 Unknown, 213 Unchecked, 6.2s Time] [2025-04-29 11:25:48,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2025-04-29 11:25:48,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 232. [2025-04-29 11:25:48,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 145 states have (on average 1.6344827586206896) internal successors, (237), 223 states have internal predecessors, (237), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2025-04-29 11:25:48,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 253 transitions. [2025-04-29 11:25:48,208 INFO L79 Accepts]: Start accepts. Automaton has 232 states and 253 transitions. Word has length 133 [2025-04-29 11:25:48,208 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 11:25:48,208 INFO L485 AbstractCegarLoop]: Abstraction has 232 states and 253 transitions. [2025-04-29 11:25:48,209 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 56 states have (on average 1.7142857142857142) internal successors, (96), 53 states have internal predecessors, (96), 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 11:25:48,209 INFO L278 IsEmpty]: Start isEmpty. Operand 232 states and 253 transitions. [2025-04-29 11:25:48,209 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2025-04-29 11:25:48,209 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:25:48,210 INFO L218 NwaCegarLoop]: trace histogram [58, 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 11:25:48,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-04-29 11:25:48,410 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 11:25:48,410 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-04-29 11:25:48,411 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:25:48,411 INFO L85 PathProgramCache]: Analyzing trace with hash 905391517, now seen corresponding path program 2 times [2025-04-29 11:25:48,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:25:48,411 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256087612] [2025-04-29 11:25:48,411 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 11:25:48,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:25:48,459 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 134 statements into 2 equivalence classes. [2025-04-29 11:25:48,547 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 134 of 134 statements. [2025-04-29 11:25:48,548 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-29 11:25:48,548 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-29 11:25:48,553 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [316447398] [2025-04-29 11:25:48,553 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 11:25:48,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:25:48,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:25:48,555 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 11:25:48,556 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 11:25:48,779 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 134 statements into 2 equivalence classes. [2025-04-29 11:25:49,518 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 134 of 134 statements. [2025-04-29 11:25:49,518 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-29 11:25:49,518 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:49,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 101 conjuncts are in the unsatisfiable core [2025-04-29 11:25:49,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:25:49,586 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 11:25:49,614 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 11:25:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2136 backedges. 1164 proven. 517 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2025-04-29 11:25:49,861 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:25:50,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2136 backedges. 453 proven. 272 refuted. 0 times theorem prover too weak. 1411 trivial. 0 not checked. [2025-04-29 11:25:50,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:25:50,411 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256087612] [2025-04-29 11:25:50,411 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-29 11:25:50,412 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316447398] [2025-04-29 11:25:50,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316447398] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:25:50,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-29 11:25:50,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 16] total 41 [2025-04-29 11:25:50,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46466114] [2025-04-29 11:25:50,412 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-29 11:25:50,412 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-04-29 11:25:50,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:25:50,413 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-04-29 11:25:50,413 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1432, Unknown=0, NotChecked=0, Total=1640 [2025-04-29 11:25:50,413 INFO L87 Difference]: Start difference. First operand 232 states and 253 transitions. Second operand has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 41 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-04-29 11:25:51,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 11:25:51,236 INFO L93 Difference]: Finished difference Result 238 states and 255 transitions. [2025-04-29 11:25:51,236 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-04-29 11:25:51,237 INFO L79 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 41 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 134 [2025-04-29 11:25:51,237 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 11:25:51,237 INFO L225 Difference]: With dead ends: 238 [2025-04-29 11:25:51,237 INFO L226 Difference]: Without dead ends: 228 [2025-04-29 11:25:51,238 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=625, Invalid=3665, Unknown=0, NotChecked=0, Total=4290 [2025-04-29 11:25:51,239 INFO L437 NwaCegarLoop]: 205 mSDtfsCounter, 42 mSDsluCounter, 5085 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 5290 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-04-29 11:25:51,239 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 5290 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-04-29 11:25:51,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2025-04-29 11:25:51,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2025-04-29 11:25:51,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 142 states have (on average 1.6267605633802817) internal successors, (231), 219 states have internal predecessors, (231), 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 11:25:51,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 243 transitions. [2025-04-29 11:25:51,245 INFO L79 Accepts]: Start accepts. Automaton has 228 states and 243 transitions. Word has length 134 [2025-04-29 11:25:51,245 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 11:25:51,245 INFO L485 AbstractCegarLoop]: Abstraction has 228 states and 243 transitions. [2025-04-29 11:25:51,246 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 41 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2025-04-29 11:25:51,246 INFO L278 IsEmpty]: Start isEmpty. Operand 228 states and 243 transitions. [2025-04-29 11:25:51,246 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2025-04-29 11:25:51,246 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:25:51,246 INFO L218 NwaCegarLoop]: trace histogram [72, 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 11:25:51,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-04-29 11:25:51,447 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-04-29 11:25:51,447 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-04-29 11:25:51,447 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:25:51,447 INFO L85 PathProgramCache]: Analyzing trace with hash -276345247, now seen corresponding path program 3 times [2025-04-29 11:25:51,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:25:51,447 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032747709] [2025-04-29 11:25:51,447 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-29 11:25:51,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:25:51,482 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 148 statements into 24 equivalence classes. [2025-04-29 11:25:51,523 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 72 of 148 statements. [2025-04-29 11:25:51,524 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-04-29 11:25:51,524 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3123 backedges. 880 proven. 42 refuted. 0 times theorem prover too weak. 2201 trivial. 0 not checked. [2025-04-29 11:25:52,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:25:52,351 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032747709] [2025-04-29 11:25:52,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032747709] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:25:52,351 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450250834] [2025-04-29 11:25:52,351 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-29 11:25:52,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:25:52,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:25:52,354 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-29 11:25:52,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-04-29 11:25:52,624 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 148 statements into 24 equivalence classes. [2025-04-29 11:25:52,644 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 30 of 148 statements. [2025-04-29 11:25:52,644 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-29 11:25:52,644 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:52,646 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-04-29 11:25:52,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:25:52,660 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 11:25:53,577 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-04-29 11:25:53,581 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-04-29 11:25:53,610 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2025-04-29 11:25:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3123 backedges. 880 proven. 0 refuted. 0 times theorem prover too weak. 2243 trivial. 0 not checked. [2025-04-29 11:25:53,638 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-29 11:25:53,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450250834] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:25:53,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-29 11:25:53,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2025-04-29 11:25:53,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646764912] [2025-04-29 11:25:53,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:25:53,638 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-04-29 11:25:53,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:25:53,639 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-04-29 11:25:53,639 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2025-04-29 11:25:53,639 INFO L87 Difference]: Start difference. First operand 228 states and 243 transitions. Second operand has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 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 11:25:53,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 11:25:53,985 INFO L93 Difference]: Finished difference Result 227 states and 242 transitions. [2025-04-29 11:25:53,986 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-04-29 11:25:53,986 INFO L79 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 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 148 [2025-04-29 11:25:53,986 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 11:25:53,987 INFO L225 Difference]: With dead ends: 227 [2025-04-29 11:25:53,987 INFO L226 Difference]: Without dead ends: 227 [2025-04-29 11:25:53,987 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2025-04-29 11:25:53,987 INFO L437 NwaCegarLoop]: 193 mSDtfsCounter, 3 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-04-29 11:25:53,987 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1200 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-04-29 11:25:53,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2025-04-29 11:25:53,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2025-04-29 11:25:53,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 142 states have (on average 1.619718309859155) internal successors, (230), 218 states have internal predecessors, (230), 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 11:25:53,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 242 transitions. [2025-04-29 11:25:53,994 INFO L79 Accepts]: Start accepts. Automaton has 227 states and 242 transitions. Word has length 148 [2025-04-29 11:25:53,994 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 11:25:53,994 INFO L485 AbstractCegarLoop]: Abstraction has 227 states and 242 transitions. [2025-04-29 11:25:53,995 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 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 11:25:53,995 INFO L278 IsEmpty]: Start isEmpty. Operand 227 states and 242 transitions. [2025-04-29 11:25:53,995 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2025-04-29 11:25:53,996 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:25:53,996 INFO L218 NwaCegarLoop]: trace histogram [72, 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, 1, 1, 1] [2025-04-29 11:25:54,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-04-29 11:25:54,200 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-04-29 11:25:54,200 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-04-29 11:25:54,200 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:25:54,200 INFO L85 PathProgramCache]: Analyzing trace with hash 851037201, now seen corresponding path program 1 times [2025-04-29 11:25:54,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:25:54,201 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971706458] [2025-04-29 11:25:54,201 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:54,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:25:54,247 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 151 statements into 1 equivalence classes. [2025-04-29 11:25:54,296 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 151 of 151 statements. [2025-04-29 11:25:54,297 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:54,297 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:54,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3123 backedges. 1764 proven. 356 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2025-04-29 11:25:54,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:25:54,969 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971706458] [2025-04-29 11:25:54,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971706458] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:25:54,969 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690785889] [2025-04-29 11:25:54,969 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:54,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:25:54,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:25:54,971 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-29 11:25:54,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-04-29 11:25:55,234 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 151 statements into 1 equivalence classes. [2025-04-29 11:25:55,343 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 151 of 151 statements. [2025-04-29 11:25:55,343 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:55,343 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:55,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 1343 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-04-29 11:25:55,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:25:55,394 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 11:25:55,427 INFO L325 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-04-29 11:25:55,427 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 11:25:55,525 INFO L325 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-04-29 11:25:55,525 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 14 treesize of output 13 [2025-04-29 11:25:55,541 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-04-29 11:25:55,561 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2025-04-29 11:25:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3123 backedges. 1594 proven. 176 refuted. 0 times theorem prover too weak. 1003 trivial. 350 not checked. [2025-04-29 11:25:55,580 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:25:56,088 INFO L325 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-04-29 11:25:56,088 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 11:25:56,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3123 backedges. 1592 proven. 528 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2025-04-29 11:25:56,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690785889] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:25:56,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-29 11:25:56,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 18] total 32 [2025-04-29 11:25:56,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740517449] [2025-04-29 11:25:56,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-29 11:25:56,102 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-04-29 11:25:56,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:25:56,102 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-04-29 11:25:56,103 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=871, Unknown=1, NotChecked=60, Total=1056 [2025-04-29 11:25:56,103 INFO L87 Difference]: Start difference. First operand 227 states and 242 transitions. Second operand has 33 states, 32 states have (on average 3.15625) internal successors, (101), 29 states have internal predecessors, (101), 2 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (10), 5 states have call predecessors, (10), 2 states have call successors, (10) [2025-04-29 11:25:56,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-29 11:25:56,854 INFO L93 Difference]: Finished difference Result 223 states and 238 transitions. [2025-04-29 11:25:56,854 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-29 11:25:56,854 INFO L79 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.15625) internal successors, (101), 29 states have internal predecessors, (101), 2 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (10), 5 states have call predecessors, (10), 2 states have call successors, (10) Word has length 151 [2025-04-29 11:25:56,854 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-29 11:25:56,855 INFO L225 Difference]: With dead ends: 223 [2025-04-29 11:25:56,855 INFO L226 Difference]: Without dead ends: 223 [2025-04-29 11:25:56,855 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 280 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=1149, Unknown=1, NotChecked=70, Total=1406 [2025-04-29 11:25:56,856 INFO L437 NwaCegarLoop]: 177 mSDtfsCounter, 37 mSDsluCounter, 2187 mSDsCounter, 0 mSdLazyCounter, 1761 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2364 SdHoareTripleChecker+Invalid, 1971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-04-29 11:25:56,856 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2364 Invalid, 1971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1761 Invalid, 0 Unknown, 197 Unchecked, 0.6s Time] [2025-04-29 11:25:56,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2025-04-29 11:25:56,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2025-04-29 11:25:56,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 142 states have (on average 1.591549295774648) internal successors, (226), 214 states have internal predecessors, (226), 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 11:25:56,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 238 transitions. [2025-04-29 11:25:56,860 INFO L79 Accepts]: Start accepts. Automaton has 223 states and 238 transitions. Word has length 151 [2025-04-29 11:25:56,860 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-29 11:25:56,860 INFO L485 AbstractCegarLoop]: Abstraction has 223 states and 238 transitions. [2025-04-29 11:25:56,860 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.15625) internal successors, (101), 29 states have internal predecessors, (101), 2 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (10), 5 states have call predecessors, (10), 2 states have call successors, (10) [2025-04-29 11:25:56,860 INFO L278 IsEmpty]: Start isEmpty. Operand 223 states and 238 transitions. [2025-04-29 11:25:56,861 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2025-04-29 11:25:56,861 INFO L210 NwaCegarLoop]: Found error trace [2025-04-29 11:25:56,861 INFO L218 NwaCegarLoop]: trace histogram [72, 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, 1, 1, 1] [2025-04-29 11:25:56,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-04-29 11:25:57,061 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-04-29 11:25:57,062 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2025-04-29 11:25:57,062 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:25:57,062 INFO L85 PathProgramCache]: Analyzing trace with hash 851037202, now seen corresponding path program 1 times [2025-04-29 11:25:57,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:25:57,062 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182293453] [2025-04-29 11:25:57,062 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:57,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:25:57,099 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 151 statements into 1 equivalence classes. [2025-04-29 11:25:57,185 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 151 of 151 statements. [2025-04-29 11:25:57,186 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:25:57,186 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:25:59,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3123 backedges. 1592 proven. 607 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2025-04-29 11:25:59,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:25:59,404 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182293453] [2025-04-29 11:25:59,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182293453] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:25:59,404 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603049470] [2025-04-29 11:25:59,404 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:25:59,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:25:59,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:25:59,405 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-29 11:25:59,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-04-29 11:25:59,663 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 151 statements into 1 equivalence classes. [2025-04-29 11:26:00,975 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 151 of 151 statements. [2025-04-29 11:26:00,975 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:26:00,975 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:00,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 1343 conjuncts, 160 conjuncts are in the unsatisfiable core [2025-04-29 11:26:00,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:01,264 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 11:26:05,431 INFO L325 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2025-04-29 11:26:05,431 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2025-04-29 11:26:05,444 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 11:26:06,596 INFO L325 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-04-29 11:26:06,596 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 1 case distinctions, treesize of input 18 treesize of output 17 [2025-04-29 11:26:06,632 INFO L325 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2025-04-29 11:26:06,632 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2025-04-29 11:26:06,739 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-04-29 11:26:06,947 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2025-04-29 11:26:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3123 backedges. 1185 proven. 1453 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2025-04-29 11:26:07,257 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:26:07,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603049470] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:26:07,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-29 11:26:07,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 60] total 92 [2025-04-29 11:26:07,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574792359] [2025-04-29 11:26:07,474 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-29 11:26:07,474 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2025-04-29 11:26:07,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:26:07,475 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2025-04-29 11:26:07,476 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=8512, Unknown=0, NotChecked=0, Total=8930 [2025-04-29 11:26:07,477 INFO L87 Difference]: Start difference. First operand 223 states and 238 transitions. Second operand has 93 states, 89 states have (on average 1.5393258426966292) internal successors, (137), 86 states have internal predecessors, (137), 5 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2025-04-29 11:26:11,553 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] Killed by 15