./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/dll2c_insert_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/dll2c_insert_equal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 535caea86e22f289c2fcb0364594f5e7b1dfaabfa814e56099346e6a240c0067 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 06:59:34,944 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 06:59:35,012 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 06:59:35,017 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 06:59:35,018 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 06:59:35,041 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 06:59:35,042 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 06:59:35,042 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 06:59:35,043 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 06:59:35,043 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 06:59:35,044 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 06:59:35,044 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 06:59:35,045 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 06:59:35,046 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 06:59:35,046 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 06:59:35,046 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 06:59:35,047 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 06:59:35,047 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 06:59:35,047 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 06:59:35,048 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 06:59:35,048 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 06:59:35,048 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 06:59:35,049 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 06:59:35,049 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 06:59:35,049 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 06:59:35,050 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 06:59:35,050 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 06:59:35,050 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 06:59:35,051 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 06:59:35,051 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 06:59:35,051 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 06:59:35,052 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 06:59:35,052 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 06:59:35,052 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 06:59:35,053 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 06:59:35,053 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 06:59:35,054 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 06:59:35,054 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 06:59:35,054 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 06:59:35,055 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 06:59:35,055 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 06:59:35,055 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 06:59:35,056 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 535caea86e22f289c2fcb0364594f5e7b1dfaabfa814e56099346e6a240c0067 [2024-11-19 06:59:35,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 06:59:35,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 06:59:35,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 06:59:35,328 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 06:59:35,328 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 06:59:35,329 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2c_insert_equal.i [2024-11-19 06:59:36,807 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 06:59:37,071 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 06:59:37,072 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_insert_equal.i [2024-11-19 06:59:37,085 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af29bdf7b/79957fa14e5c4e488a40c68c59356149/FLAG2dca18b65 [2024-11-19 06:59:37,097 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af29bdf7b/79957fa14e5c4e488a40c68c59356149 [2024-11-19 06:59:37,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 06:59:37,101 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 06:59:37,102 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 06:59:37,103 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 06:59:37,108 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 06:59:37,109 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:59:37" (1/1) ... [2024-11-19 06:59:37,112 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45abac47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:37, skipping insertion in model container [2024-11-19 06:59:37,112 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:59:37" (1/1) ... [2024-11-19 06:59:37,161 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 06:59:37,463 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 06:59:37,473 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 06:59:37,516 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 06:59:37,543 INFO L204 MainTranslator]: Completed translation [2024-11-19 06:59:37,544 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:37 WrapperNode [2024-11-19 06:59:37,544 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 06:59:37,545 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 06:59:37,545 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 06:59:37,545 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 06:59:37,552 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:37" (1/1) ... [2024-11-19 06:59:37,567 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:37" (1/1) ... [2024-11-19 06:59:37,593 INFO L138 Inliner]: procedures = 127, calls = 54, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 164 [2024-11-19 06:59:37,594 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 06:59:37,595 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 06:59:37,595 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 06:59:37,595 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 06:59:37,607 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:37" (1/1) ... [2024-11-19 06:59:37,607 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:37" (1/1) ... [2024-11-19 06:59:37,612 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:37" (1/1) ... [2024-11-19 06:59:37,643 INFO L175 MemorySlicer]: Split 35 memory accesses to 3 slices as follows [2, 11, 22]. 63 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0]. The 18 writes are split as follows [0, 1, 17]. [2024-11-19 06:59:37,643 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:37" (1/1) ... [2024-11-19 06:59:37,644 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:37" (1/1) ... [2024-11-19 06:59:37,653 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:37" (1/1) ... [2024-11-19 06:59:37,658 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:37" (1/1) ... [2024-11-19 06:59:37,661 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:37" (1/1) ... [2024-11-19 06:59:37,665 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:37" (1/1) ... [2024-11-19 06:59:37,669 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 06:59:37,670 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 06:59:37,670 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 06:59:37,670 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 06:59:37,671 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:37" (1/1) ... [2024-11-19 06:59:37,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 06:59:37,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:59:37,712 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) [2024-11-19 06:59:37,715 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 [2024-11-19 06:59:37,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 06:59:37,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 06:59:37,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-19 06:59:37,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 06:59:37,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 06:59:37,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-19 06:59:37,761 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-11-19 06:59:37,761 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-11-19 06:59:37,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 06:59:37,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 06:59:37,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-19 06:59:37,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-19 06:59:37,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-19 06:59:37,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-19 06:59:37,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-19 06:59:37,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-19 06:59:37,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-19 06:59:37,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-19 06:59:37,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-19 06:59:37,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-19 06:59:37,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-19 06:59:37,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 06:59:37,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 06:59:37,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-19 06:59:37,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 06:59:37,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 06:59:37,902 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 06:59:37,904 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 06:59:38,360 INFO L? ?]: Removed 174 outVars from TransFormulas that were not future-live. [2024-11-19 06:59:38,361 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 06:59:38,377 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 06:59:38,379 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-19 06:59:38,380 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:59:38 BoogieIcfgContainer [2024-11-19 06:59:38,380 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 06:59:38,382 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 06:59:38,383 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 06:59:38,386 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 06:59:38,386 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:59:37" (1/3) ... [2024-11-19 06:59:38,387 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c1d669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:59:38, skipping insertion in model container [2024-11-19 06:59:38,387 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:37" (2/3) ... [2024-11-19 06:59:38,387 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c1d669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:59:38, skipping insertion in model container [2024-11-19 06:59:38,387 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:59:38" (3/3) ... [2024-11-19 06:59:38,388 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_insert_equal.i [2024-11-19 06:59:38,404 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 06:59:38,404 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 72 error locations. [2024-11-19 06:59:38,458 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 06:59:38,464 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4f114c95, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 06:59:38,465 INFO L334 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2024-11-19 06:59:38,468 INFO L276 IsEmpty]: Start isEmpty. Operand has 157 states, 80 states have (on average 2.1) internal successors, (168), 152 states have internal predecessors, (168), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 06:59:38,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-19 06:59:38,475 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:59:38,475 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-19 06:59:38,476 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 06:59:38,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:59:38,482 INFO L85 PathProgramCache]: Analyzing trace with hash 896780786, now seen corresponding path program 1 times [2024-11-19 06:59:38,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:59:38,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488262345] [2024-11-19 06:59:38,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:38,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:59:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:38,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:59:38,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:59:38,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488262345] [2024-11-19 06:59:38,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488262345] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:59:38,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:59:38,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 06:59:38,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109335890] [2024-11-19 06:59:38,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:59:38,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 06:59:38,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:59:38,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 06:59:38,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:59:38,800 INFO L87 Difference]: Start difference. First operand has 157 states, 80 states have (on average 2.1) internal successors, (168), 152 states have internal predecessors, (168), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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) [2024-11-19 06:59:38,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:59:38,977 INFO L93 Difference]: Finished difference Result 153 states and 164 transitions. [2024-11-19 06:59:38,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 06:59:38,980 INFO L78 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 [2024-11-19 06:59:38,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:59:38,989 INFO L225 Difference]: With dead ends: 153 [2024-11-19 06:59:38,989 INFO L226 Difference]: Without dead ends: 150 [2024-11-19 06:59:38,990 INFO L431 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 [2024-11-19 06:59:38,996 INFO L432 NwaCegarLoop]: 155 mSDtfsCounter, 3 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:59:38,997 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 242 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:59:39,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-19 06:59:39,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2024-11-19 06:59:39,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 77 states have (on average 2.0) internal successors, (154), 145 states have internal predecessors, (154), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 06:59:39,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 160 transitions. [2024-11-19 06:59:39,047 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 160 transitions. Word has length 6 [2024-11-19 06:59:39,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:59:39,047 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 160 transitions. [2024-11-19 06:59:39,047 INFO L472 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) [2024-11-19 06:59:39,047 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 160 transitions. [2024-11-19 06:59:39,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-19 06:59:39,048 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:59:39,048 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-19 06:59:39,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 06:59:39,049 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 06:59:39,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:59:39,051 INFO L85 PathProgramCache]: Analyzing trace with hash 896780787, now seen corresponding path program 1 times [2024-11-19 06:59:39,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:59:39,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293819639] [2024-11-19 06:59:39,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:39,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:59:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:59:39,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:59:39,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293819639] [2024-11-19 06:59:39,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293819639] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:59:39,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:59:39,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 06:59:39,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962291354] [2024-11-19 06:59:39,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:59:39,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 06:59:39,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:59:39,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 06:59:39,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:59:39,187 INFO L87 Difference]: Start difference. First operand 150 states and 160 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) [2024-11-19 06:59:39,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:59:39,305 INFO L93 Difference]: Finished difference Result 147 states and 157 transitions. [2024-11-19 06:59:39,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 06:59:39,305 INFO L78 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 [2024-11-19 06:59:39,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:59:39,307 INFO L225 Difference]: With dead ends: 147 [2024-11-19 06:59:39,309 INFO L226 Difference]: Without dead ends: 147 [2024-11-19 06:59:39,309 INFO L431 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 [2024-11-19 06:59:39,310 INFO L432 NwaCegarLoop]: 152 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:59:39,311 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 243 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:59:39,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-19 06:59:39,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2024-11-19 06:59:39,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 77 states have (on average 1.9610389610389611) internal successors, (151), 142 states have internal predecessors, (151), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 06:59:39,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 157 transitions. [2024-11-19 06:59:39,358 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 157 transitions. Word has length 6 [2024-11-19 06:59:39,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:59:39,359 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 157 transitions. [2024-11-19 06:59:39,359 INFO L472 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) [2024-11-19 06:59:39,359 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 157 transitions. [2024-11-19 06:59:39,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-19 06:59:39,361 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:59:39,362 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:59:39,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 06:59:39,362 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 06:59:39,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:59:39,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1471319004, now seen corresponding path program 1 times [2024-11-19 06:59:39,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:59:39,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979173577] [2024-11-19 06:59:39,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:39,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:59:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:39,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:59:39,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:59:39,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979173577] [2024-11-19 06:59:39,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979173577] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:59:39,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:59:39,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 06:59:39,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187442148] [2024-11-19 06:59:39,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:59:39,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 06:59:39,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:59:39,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 06:59:39,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:59:39,490 INFO L87 Difference]: Start difference. First operand 147 states and 157 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-19 06:59:39,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:59:39,513 INFO L93 Difference]: Finished difference Result 158 states and 170 transitions. [2024-11-19 06:59:39,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 06:59:39,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-19 06:59:39,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:59:39,515 INFO L225 Difference]: With dead ends: 158 [2024-11-19 06:59:39,515 INFO L226 Difference]: Without dead ends: 158 [2024-11-19 06:59:39,516 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:59:39,517 INFO L432 NwaCegarLoop]: 155 mSDtfsCounter, 10 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 06:59:39,517 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 305 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 06:59:39,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-19 06:59:39,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2024-11-19 06:59:39,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 78 states have (on average 1.9487179487179487) internal successors, (152), 143 states have internal predecessors, (152), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 06:59:39,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 158 transitions. [2024-11-19 06:59:39,527 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 158 transitions. Word has length 14 [2024-11-19 06:59:39,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:59:39,528 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 158 transitions. [2024-11-19 06:59:39,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-19 06:59:39,528 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 158 transitions. [2024-11-19 06:59:39,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-19 06:59:39,529 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:59:39,529 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:59:39,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 06:59:39,530 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 06:59:39,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:59:39,530 INFO L85 PathProgramCache]: Analyzing trace with hash -914713696, now seen corresponding path program 1 times [2024-11-19 06:59:39,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:59:39,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096957884] [2024-11-19 06:59:39,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:39,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:59:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:39,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 06:59:39,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:59:39,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096957884] [2024-11-19 06:59:39,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096957884] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:59:39,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:59:39,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 06:59:39,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742401382] [2024-11-19 06:59:39,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:59:39,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 06:59:39,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:59:39,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 06:59:39,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-19 06:59:39,736 INFO L87 Difference]: Start difference. First operand 148 states and 158 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 06:59:40,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:59:40,016 INFO L93 Difference]: Finished difference Result 147 states and 157 transitions. [2024-11-19 06:59:40,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 06:59:40,017 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2024-11-19 06:59:40,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:59:40,018 INFO L225 Difference]: With dead ends: 147 [2024-11-19 06:59:40,018 INFO L226 Difference]: Without dead ends: 147 [2024-11-19 06:59:40,020 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-19 06:59:40,021 INFO L432 NwaCegarLoop]: 145 mSDtfsCounter, 7 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 06:59:40,021 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 455 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 06:59:40,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-19 06:59:40,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2024-11-19 06:59:40,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 78 states have (on average 1.935897435897436) internal successors, (151), 142 states have internal predecessors, (151), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 06:59:40,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 157 transitions. [2024-11-19 06:59:40,033 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 157 transitions. Word has length 24 [2024-11-19 06:59:40,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:59:40,033 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 157 transitions. [2024-11-19 06:59:40,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 06:59:40,034 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 157 transitions. [2024-11-19 06:59:40,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-19 06:59:40,034 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:59:40,034 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:59:40,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 06:59:40,035 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 06:59:40,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:59:40,036 INFO L85 PathProgramCache]: Analyzing trace with hash -914713695, now seen corresponding path program 1 times [2024-11-19 06:59:40,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:59:40,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680055643] [2024-11-19 06:59:40,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:40,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:59:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:40,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:59:40,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:59:40,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680055643] [2024-11-19 06:59:40,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680055643] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:59:40,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:59:40,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 06:59:40,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899750996] [2024-11-19 06:59:40,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:59:40,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 06:59:40,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:59:40,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 06:59:40,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-19 06:59:40,267 INFO L87 Difference]: Start difference. First operand 147 states and 157 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 06:59:40,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:59:40,504 INFO L93 Difference]: Finished difference Result 146 states and 156 transitions. [2024-11-19 06:59:40,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 06:59:40,505 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2024-11-19 06:59:40,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:59:40,506 INFO L225 Difference]: With dead ends: 146 [2024-11-19 06:59:40,506 INFO L226 Difference]: Without dead ends: 146 [2024-11-19 06:59:40,507 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-19 06:59:40,508 INFO L432 NwaCegarLoop]: 145 mSDtfsCounter, 6 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 06:59:40,510 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 479 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 06:59:40,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-19 06:59:40,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2024-11-19 06:59:40,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 78 states have (on average 1.9230769230769231) internal successors, (150), 141 states have internal predecessors, (150), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 06:59:40,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 156 transitions. [2024-11-19 06:59:40,522 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 156 transitions. Word has length 24 [2024-11-19 06:59:40,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:59:40,522 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 156 transitions. [2024-11-19 06:59:40,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 06:59:40,523 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 156 transitions. [2024-11-19 06:59:40,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-19 06:59:40,523 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:59:40,523 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:59:40,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 06:59:40,524 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 06:59:40,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:59:40,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1428433537, now seen corresponding path program 1 times [2024-11-19 06:59:40,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:59:40,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9870265] [2024-11-19 06:59:40,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:40,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:59:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:59:40,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:59:40,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9870265] [2024-11-19 06:59:40,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9870265] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:59:40,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784019666] [2024-11-19 06:59:40,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:40,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:59:40,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:59:40,783 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) [2024-11-19 06:59:40,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 06:59:40,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:40,914 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 06:59:40,921 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:59:40,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 06:59:41,017 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2024-11-19 06:59:41,058 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-19 06:59:41,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-19 06:59:41,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2024-11-19 06:59:41,084 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:59:41,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:59:41,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784019666] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:59:41,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:59:41,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 11 [2024-11-19 06:59:41,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891393817] [2024-11-19 06:59:41,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:59:41,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 06:59:41,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:59:41,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 06:59:41,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=84, Unknown=1, NotChecked=18, Total=132 [2024-11-19 06:59:41,299 INFO L87 Difference]: Start difference. First operand 146 states and 156 transitions. Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-19 06:59:41,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:59:41,648 INFO L93 Difference]: Finished difference Result 151 states and 164 transitions. [2024-11-19 06:59:41,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 06:59:41,648 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2024-11-19 06:59:41,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:59:41,650 INFO L225 Difference]: With dead ends: 151 [2024-11-19 06:59:41,650 INFO L226 Difference]: Without dead ends: 151 [2024-11-19 06:59:41,650 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=101, Unknown=1, NotChecked=20, Total=156 [2024-11-19 06:59:41,651 INFO L432 NwaCegarLoop]: 141 mSDtfsCounter, 1 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 06:59:41,651 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 581 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 484 Invalid, 0 Unknown, 157 Unchecked, 0.3s Time] [2024-11-19 06:59:41,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-19 06:59:41,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2024-11-19 06:59:41,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 82 states have (on average 1.9024390243902438) internal successors, (156), 145 states have internal predecessors, (156), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-19 06:59:41,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 164 transitions. [2024-11-19 06:59:41,657 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 164 transitions. Word has length 26 [2024-11-19 06:59:41,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:59:41,657 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 164 transitions. [2024-11-19 06:59:41,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-19 06:59:41,658 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 164 transitions. [2024-11-19 06:59:41,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-19 06:59:41,658 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:59:41,658 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:59:41,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 06:59:41,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-19 06:59:41,859 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 06:59:41,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:59:41,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1428433538, now seen corresponding path program 1 times [2024-11-19 06:59:41,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:59:41,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933859349] [2024-11-19 06:59:41,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:41,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:59:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:59:42,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:59:42,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933859349] [2024-11-19 06:59:42,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933859349] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:59:42,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700614294] [2024-11-19 06:59:42,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:42,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:59:42,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:59:42,302 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) [2024-11-19 06:59:42,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 06:59:42,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:42,418 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-19 06:59:42,421 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:59:42,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 06:59:42,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 06:59:42,585 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 06:59:42,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-19 06:59:42,609 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 06:59:42,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 06:59:42,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:59:42,646 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:59:42,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700614294] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:59:42,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 06:59:42,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2024-11-19 06:59:42,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239556046] [2024-11-19 06:59:42,774 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 06:59:42,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 06:59:42,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:59:42,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 06:59:42,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-19 06:59:42,776 INFO L87 Difference]: Start difference. First operand 151 states and 164 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 06:59:43,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:59:43,320 INFO L93 Difference]: Finished difference Result 151 states and 163 transitions. [2024-11-19 06:59:43,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 06:59:43,320 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-11-19 06:59:43,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:59:43,321 INFO L225 Difference]: With dead ends: 151 [2024-11-19 06:59:43,321 INFO L226 Difference]: Without dead ends: 151 [2024-11-19 06:59:43,321 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2024-11-19 06:59:43,322 INFO L432 NwaCegarLoop]: 142 mSDtfsCounter, 0 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-19 06:59:43,322 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 757 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-19 06:59:43,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-19 06:59:43,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2024-11-19 06:59:43,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 82 states have (on average 1.8902439024390243) internal successors, (155), 145 states have internal predecessors, (155), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-19 06:59:43,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 163 transitions. [2024-11-19 06:59:43,326 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 163 transitions. Word has length 26 [2024-11-19 06:59:43,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:59:43,326 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 163 transitions. [2024-11-19 06:59:43,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 06:59:43,327 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 163 transitions. [2024-11-19 06:59:43,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-19 06:59:43,327 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:59:43,327 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:59:43,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-19 06:59:43,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-19 06:59:43,532 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 06:59:43,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:59:43,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1664751529, now seen corresponding path program 1 times [2024-11-19 06:59:43,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:59:43,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270190684] [2024-11-19 06:59:43,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:43,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:59:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:43,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:59:43,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:59:43,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270190684] [2024-11-19 06:59:43,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270190684] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:59:43,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069448544] [2024-11-19 06:59:43,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:43,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:59:43,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:59:43,616 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) [2024-11-19 06:59:43,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 06:59:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:43,737 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 06:59:43,739 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:59:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:59:43,758 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:59:43,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:59:43,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069448544] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:59:43,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:59:43,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-11-19 06:59:43,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128176068] [2024-11-19 06:59:43,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:59:43,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 06:59:43,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:59:43,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 06:59:43,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-19 06:59:43,799 INFO L87 Difference]: Start difference. First operand 151 states and 163 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 06:59:43,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:59:43,858 INFO L93 Difference]: Finished difference Result 151 states and 162 transitions. [2024-11-19 06:59:43,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 06:59:43,859 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2024-11-19 06:59:43,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:59:43,860 INFO L225 Difference]: With dead ends: 151 [2024-11-19 06:59:43,860 INFO L226 Difference]: Without dead ends: 151 [2024-11-19 06:59:43,860 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-19 06:59:43,861 INFO L432 NwaCegarLoop]: 146 mSDtfsCounter, 1 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:59:43,861 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 714 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:59:43,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-19 06:59:43,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2024-11-19 06:59:43,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 82 states have (on average 1.8780487804878048) internal successors, (154), 145 states have internal predecessors, (154), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-19 06:59:43,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 162 transitions. [2024-11-19 06:59:43,866 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 162 transitions. Word has length 28 [2024-11-19 06:59:43,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:59:43,867 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 162 transitions. [2024-11-19 06:59:43,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 06:59:43,867 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 162 transitions. [2024-11-19 06:59:43,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-19 06:59:43,868 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:59:43,868 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:59:43,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-19 06:59:44,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:59:44,069 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 06:59:44,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:59:44,085 INFO L85 PathProgramCache]: Analyzing trace with hash -72470510, now seen corresponding path program 1 times [2024-11-19 06:59:44,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:59:44,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056826081] [2024-11-19 06:59:44,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:44,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:59:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:44,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:59:44,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:59:44,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056826081] [2024-11-19 06:59:44,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056826081] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:59:44,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753475498] [2024-11-19 06:59:44,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:44,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:59:44,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:59:44,185 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) [2024-11-19 06:59:44,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 06:59:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:44,322 INFO L255 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-19 06:59:44,324 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:59:44,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 06:59:44,382 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-11-19 06:59:44,429 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-19 06:59:44,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-19 06:59:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 7 not checked. [2024-11-19 06:59:44,441 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:59:44,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753475498] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:59:44,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 06:59:44,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 9 [2024-11-19 06:59:44,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173391739] [2024-11-19 06:59:44,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 06:59:44,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 06:59:44,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:59:44,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 06:59:44,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=72, Unknown=1, NotChecked=16, Total=110 [2024-11-19 06:59:44,497 INFO L87 Difference]: Start difference. First operand 151 states and 162 transitions. Second operand has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-19 06:59:44,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:59:44,826 INFO L93 Difference]: Finished difference Result 150 states and 161 transitions. [2024-11-19 06:59:44,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 06:59:44,827 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2024-11-19 06:59:44,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:59:44,829 INFO L225 Difference]: With dead ends: 150 [2024-11-19 06:59:44,829 INFO L226 Difference]: Without dead ends: 150 [2024-11-19 06:59:44,829 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=126, Unknown=1, NotChecked=22, Total=182 [2024-11-19 06:59:44,830 INFO L432 NwaCegarLoop]: 138 mSDtfsCounter, 9 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 06:59:44,830 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 713 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 491 Invalid, 0 Unknown, 154 Unchecked, 0.3s Time] [2024-11-19 06:59:44,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-19 06:59:44,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2024-11-19 06:59:44,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 82 states have (on average 1.8658536585365855) internal successors, (153), 144 states have internal predecessors, (153), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-19 06:59:44,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 161 transitions. [2024-11-19 06:59:44,838 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 161 transitions. Word has length 29 [2024-11-19 06:59:44,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:59:44,839 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 161 transitions. [2024-11-19 06:59:44,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-19 06:59:44,839 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 161 transitions. [2024-11-19 06:59:44,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-19 06:59:44,840 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:59:44,840 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:59:44,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-19 06:59:45,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:59:45,041 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 06:59:45,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:59:45,041 INFO L85 PathProgramCache]: Analyzing trace with hash -72470509, now seen corresponding path program 1 times [2024-11-19 06:59:45,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:59:45,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571755661] [2024-11-19 06:59:45,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:45,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:59:45,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:45,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:59:45,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:59:45,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571755661] [2024-11-19 06:59:45,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571755661] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:59:45,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915365401] [2024-11-19 06:59:45,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:45,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:59:45,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:59:45,207 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) [2024-11-19 06:59:45,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 06:59:45,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:45,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-19 06:59:45,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:59:45,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 06:59:45,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 06:59:45,504 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-11-19 06:59:45,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 06:59:45,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-19 06:59:45,560 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 06:59:45,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 06:59:45,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2024-11-19 06:59:45,604 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:59:45,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915365401] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:59:45,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 06:59:45,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2024-11-19 06:59:45,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758956189] [2024-11-19 06:59:45,725 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 06:59:45,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 06:59:45,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:59:45,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 06:59:45,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=201, Unknown=1, NotChecked=28, Total=272 [2024-11-19 06:59:45,726 INFO L87 Difference]: Start difference. First operand 150 states and 161 transitions. Second operand has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-19 06:59:46,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:59:46,159 INFO L93 Difference]: Finished difference Result 167 states and 183 transitions. [2024-11-19 06:59:46,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 06:59:46,160 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2024-11-19 06:59:46,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:59:46,162 INFO L225 Difference]: With dead ends: 167 [2024-11-19 06:59:46,162 INFO L226 Difference]: Without dead ends: 167 [2024-11-19 06:59:46,162 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=316, Unknown=1, NotChecked=36, Total=420 [2024-11-19 06:59:46,163 INFO L432 NwaCegarLoop]: 138 mSDtfsCounter, 24 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 06:59:46,163 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 991 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 540 Invalid, 0 Unknown, 176 Unchecked, 0.3s Time] [2024-11-19 06:59:46,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-11-19 06:59:46,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 160. [2024-11-19 06:59:46,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 91 states have (on average 1.835164835164835) internal successors, (167), 153 states have internal predecessors, (167), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 06:59:46,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 177 transitions. [2024-11-19 06:59:46,167 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 177 transitions. Word has length 29 [2024-11-19 06:59:46,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:59:46,168 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 177 transitions. [2024-11-19 06:59:46,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-19 06:59:46,168 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 177 transitions. [2024-11-19 06:59:46,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-19 06:59:46,168 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:59:46,168 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:59:46,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 06:59:46,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-19 06:59:46,369 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 06:59:46,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:59:46,370 INFO L85 PathProgramCache]: Analyzing trace with hash 2048381491, now seen corresponding path program 1 times [2024-11-19 06:59:46,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:59:46,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015021101] [2024-11-19 06:59:46,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:46,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:59:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 06:59:46,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:59:46,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015021101] [2024-11-19 06:59:46,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015021101] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:59:46,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:59:46,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 06:59:46,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318628517] [2024-11-19 06:59:46,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:59:46,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 06:59:46,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:59:46,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 06:59:46,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-19 06:59:46,470 INFO L87 Difference]: Start difference. First operand 160 states and 177 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 06:59:46,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:59:46,703 INFO L93 Difference]: Finished difference Result 159 states and 176 transitions. [2024-11-19 06:59:46,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 06:59:46,704 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2024-11-19 06:59:46,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:59:46,705 INFO L225 Difference]: With dead ends: 159 [2024-11-19 06:59:46,705 INFO L226 Difference]: Without dead ends: 159 [2024-11-19 06:59:46,705 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-19 06:59:46,705 INFO L432 NwaCegarLoop]: 142 mSDtfsCounter, 7 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 06:59:46,706 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 518 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 06:59:46,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-19 06:59:46,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2024-11-19 06:59:46,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 91 states have (on average 1.8241758241758241) internal successors, (166), 152 states have internal predecessors, (166), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 06:59:46,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 176 transitions. [2024-11-19 06:59:46,712 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 176 transitions. Word has length 30 [2024-11-19 06:59:46,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:59:46,712 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 176 transitions. [2024-11-19 06:59:46,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 06:59:46,713 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 176 transitions. [2024-11-19 06:59:46,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-19 06:59:46,714 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:59:46,714 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:59:46,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-19 06:59:46,714 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 06:59:46,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:59:46,715 INFO L85 PathProgramCache]: Analyzing trace with hash 2048381492, now seen corresponding path program 1 times [2024-11-19 06:59:46,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:59:46,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173982841] [2024-11-19 06:59:46,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:46,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:59:46,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:46,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:59:46,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:59:46,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173982841] [2024-11-19 06:59:46,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173982841] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:59:46,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:59:46,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 06:59:46,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122512842] [2024-11-19 06:59:46,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:59:46,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 06:59:46,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:59:46,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 06:59:46,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-19 06:59:46,917 INFO L87 Difference]: Start difference. First operand 159 states and 176 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 06:59:47,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:59:47,150 INFO L93 Difference]: Finished difference Result 158 states and 175 transitions. [2024-11-19 06:59:47,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 06:59:47,150 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2024-11-19 06:59:47,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:59:47,151 INFO L225 Difference]: With dead ends: 158 [2024-11-19 06:59:47,151 INFO L226 Difference]: Without dead ends: 158 [2024-11-19 06:59:47,151 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-19 06:59:47,152 INFO L432 NwaCegarLoop]: 141 mSDtfsCounter, 6 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 06:59:47,152 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 543 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 06:59:47,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-19 06:59:47,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2024-11-19 06:59:47,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 91 states have (on average 1.8131868131868132) internal successors, (165), 151 states have internal predecessors, (165), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 06:59:47,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 175 transitions. [2024-11-19 06:59:47,155 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 175 transitions. Word has length 30 [2024-11-19 06:59:47,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:59:47,155 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 175 transitions. [2024-11-19 06:59:47,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 06:59:47,155 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 175 transitions. [2024-11-19 06:59:47,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-19 06:59:47,156 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:59:47,156 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:59:47,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-19 06:59:47,156 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 06:59:47,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:59:47,157 INFO L85 PathProgramCache]: Analyzing trace with hash 409808311, now seen corresponding path program 1 times [2024-11-19 06:59:47,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:59:47,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809360332] [2024-11-19 06:59:47,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:47,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:59:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-19 06:59:47,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:59:47,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809360332] [2024-11-19 06:59:47,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809360332] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:59:47,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981814336] [2024-11-19 06:59:47,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:47,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:59:47,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:59:47,284 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) [2024-11-19 06:59:47,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 06:59:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:47,442 INFO L255 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 06:59:47,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:59:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:59:47,469 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 06:59:47,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981814336] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:59:47,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 06:59:47,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2024-11-19 06:59:47,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338099017] [2024-11-19 06:59:47,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:59:47,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 06:59:47,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:59:47,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 06:59:47,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-19 06:59:47,472 INFO L87 Difference]: Start difference. First operand 158 states and 175 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 06:59:47,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:59:47,485 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2024-11-19 06:59:47,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 06:59:47,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2024-11-19 06:59:47,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:59:47,486 INFO L225 Difference]: With dead ends: 140 [2024-11-19 06:59:47,486 INFO L226 Difference]: Without dead ends: 140 [2024-11-19 06:59:47,487 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-19 06:59:47,488 INFO L432 NwaCegarLoop]: 145 mSDtfsCounter, 0 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 06:59:47,488 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 286 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 06:59:47,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-19 06:59:47,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2024-11-19 06:59:47,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 78 states have (on average 1.8205128205128205) internal successors, (142), 135 states have internal predecessors, (142), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 06:59:47,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 148 transitions. [2024-11-19 06:59:47,491 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 148 transitions. Word has length 41 [2024-11-19 06:59:47,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:59:47,492 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 148 transitions. [2024-11-19 06:59:47,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 06:59:47,492 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 148 transitions. [2024-11-19 06:59:47,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-19 06:59:47,492 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:59:47,493 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:59:47,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 06:59:47,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:59:47,693 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 06:59:47,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:59:47,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1648035753, now seen corresponding path program 1 times [2024-11-19 06:59:47,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:59:47,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766770255] [2024-11-19 06:59:47,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:47,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:59:47,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:48,191 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 06:59:48,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:59:48,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766770255] [2024-11-19 06:59:48,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766770255] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:59:48,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876201660] [2024-11-19 06:59:48,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:48,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:59:48,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:59:48,194 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) [2024-11-19 06:59:48,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 06:59:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:48,372 INFO L255 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-19 06:59:48,375 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:59:48,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 06:59:48,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-19 06:59:48,393 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))))) is different from true [2024-11-19 06:59:48,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 06:59:48,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-19 06:59:48,442 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2024-11-19 06:59:48,464 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-19 06:59:48,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-19 06:59:48,542 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-19 06:59:48,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-19 06:59:48,559 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 14 not checked. [2024-11-19 06:59:48,559 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:59:48,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876201660] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:59:48,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 06:59:48,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 14 [2024-11-19 06:59:48,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467945805] [2024-11-19 06:59:48,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 06:59:48,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 06:59:48,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:59:48,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 06:59:48,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=167, Unknown=2, NotChecked=54, Total=272 [2024-11-19 06:59:48,871 INFO L87 Difference]: Start difference. First operand 140 states and 148 transitions. Second operand has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 3 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-19 06:59:49,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:59:49,340 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2024-11-19 06:59:49,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 06:59:49,341 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 3 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2024-11-19 06:59:49,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:59:49,341 INFO L225 Difference]: With dead ends: 149 [2024-11-19 06:59:49,341 INFO L226 Difference]: Without dead ends: 149 [2024-11-19 06:59:49,342 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 69 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=240, Unknown=2, NotChecked=66, Total=380 [2024-11-19 06:59:49,342 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 273 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-19 06:59:49,343 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 404 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 510 Invalid, 0 Unknown, 302 Unchecked, 0.4s Time] [2024-11-19 06:59:49,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-11-19 06:59:49,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 130. [2024-11-19 06:59:49,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 78 states have (on average 1.6923076923076923) internal successors, (132), 125 states have internal predecessors, (132), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 06:59:49,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 138 transitions. [2024-11-19 06:59:49,346 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 138 transitions. Word has length 43 [2024-11-19 06:59:49,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:59:49,346 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 138 transitions. [2024-11-19 06:59:49,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 3 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-19 06:59:49,346 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 138 transitions. [2024-11-19 06:59:49,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-19 06:59:49,347 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:59:49,347 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:59:49,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-19 06:59:49,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:59:49,551 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 06:59:49,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:59:49,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1648035752, now seen corresponding path program 1 times [2024-11-19 06:59:49,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:59:49,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075199909] [2024-11-19 06:59:49,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:49,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:59:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:50,248 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:59:50,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:59:50,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075199909] [2024-11-19 06:59:50,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075199909] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:59:50,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654679060] [2024-11-19 06:59:50,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:50,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:59:50,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:59:50,250 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) [2024-11-19 06:59:50,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 06:59:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:50,430 INFO L255 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-19 06:59:50,434 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:59:50,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 06:59:50,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 06:59:50,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-19 06:59:50,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-19 06:59:50,559 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-19 06:59:50,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-19 06:59:50,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-19 06:59:50,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2024-11-19 06:59:50,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 06:59:50,696 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-11-19 06:59:50,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 06:59:50,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-19 06:59:50,749 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-19 06:59:50,749 INFO L378 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 [2024-11-19 06:59:50,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-19 06:59:50,893 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2024-11-19 06:59:50,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 06:59:50,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-19 06:59:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 21 not checked. [2024-11-19 06:59:50,946 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:59:51,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654679060] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:59:51,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 06:59:51,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 22 [2024-11-19 06:59:51,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883119318] [2024-11-19 06:59:51,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 06:59:51,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-19 06:59:51,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:59:51,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-19 06:59:51,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=426, Unknown=2, NotChecked=86, Total=600 [2024-11-19 06:59:51,030 INFO L87 Difference]: Start difference. First operand 130 states and 138 transitions. Second operand has 23 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 5 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-19 06:59:51,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:59:51,703 INFO L93 Difference]: Finished difference Result 121 states and 129 transitions. [2024-11-19 06:59:51,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 06:59:51,704 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 5 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2024-11-19 06:59:51,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:59:51,705 INFO L225 Difference]: With dead ends: 121 [2024-11-19 06:59:51,705 INFO L226 Difference]: Without dead ends: 121 [2024-11-19 06:59:51,707 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=545, Unknown=2, NotChecked=98, Total=756 [2024-11-19 06:59:51,708 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 187 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-19 06:59:51,708 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 528 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 737 Invalid, 0 Unknown, 244 Unchecked, 0.6s Time] [2024-11-19 06:59:51,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-11-19 06:59:51,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2024-11-19 06:59:51,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 78 states have (on average 1.564102564102564) internal successors, (122), 115 states have internal predecessors, (122), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 06:59:51,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 128 transitions. [2024-11-19 06:59:51,711 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 128 transitions. Word has length 43 [2024-11-19 06:59:51,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:59:51,711 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 128 transitions. [2024-11-19 06:59:51,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 5 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-19 06:59:51,712 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 128 transitions. [2024-11-19 06:59:51,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-19 06:59:51,712 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:59:51,713 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:59:51,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-19 06:59:51,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-19 06:59:51,918 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 06:59:51,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:59:51,918 INFO L85 PathProgramCache]: Analyzing trace with hash -861940870, now seen corresponding path program 1 times [2024-11-19 06:59:51,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:59:51,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589159618] [2024-11-19 06:59:51,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:51,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:59:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:59:52,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:59:52,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589159618] [2024-11-19 06:59:52,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589159618] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:59:52,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043761181] [2024-11-19 06:59:52,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:52,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:59:52,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:59:52,345 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) [2024-11-19 06:59:52,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 06:59:52,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:52,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-19 06:59:52,751 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:59:52,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-19 06:59:52,861 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-11-19 06:59:52,898 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2024-11-19 06:59:52,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 24 [2024-11-19 06:59:52,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-19 06:59:52,913 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 06:59:52,913 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 06:59:52,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043761181] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:59:52,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 06:59:52,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 20 [2024-11-19 06:59:52,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419144971] [2024-11-19 06:59:52,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:59:52,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 06:59:52,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:59:52,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 06:59:52,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=332, Unknown=1, NotChecked=36, Total=420 [2024-11-19 06:59:52,915 INFO L87 Difference]: Start difference. First operand 120 states and 128 transitions. Second operand has 11 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 06:59:53,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:59:53,114 INFO L93 Difference]: Finished difference Result 164 states and 177 transitions. [2024-11-19 06:59:53,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 06:59:53,114 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2024-11-19 06:59:53,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:59:53,115 INFO L225 Difference]: With dead ends: 164 [2024-11-19 06:59:53,115 INFO L226 Difference]: Without dead ends: 164 [2024-11-19 06:59:53,116 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=443, Unknown=1, NotChecked=42, Total=552 [2024-11-19 06:59:53,116 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 140 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 06:59:53,117 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 371 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 314 Invalid, 0 Unknown, 243 Unchecked, 0.2s Time] [2024-11-19 06:59:53,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-11-19 06:59:53,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 127. [2024-11-19 06:59:53,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 85 states have (on average 1.6352941176470588) internal successors, (139), 122 states have internal predecessors, (139), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 06:59:53,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 145 transitions. [2024-11-19 06:59:53,120 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 145 transitions. Word has length 46 [2024-11-19 06:59:53,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:59:53,120 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 145 transitions. [2024-11-19 06:59:53,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 06:59:53,120 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 145 transitions. [2024-11-19 06:59:53,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-19 06:59:53,120 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:59:53,120 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:59:53,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-19 06:59:53,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-19 06:59:53,321 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 06:59:53,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:59:53,322 INFO L85 PathProgramCache]: Analyzing trace with hash -861940869, now seen corresponding path program 1 times [2024-11-19 06:59:53,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:59:53,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502573375] [2024-11-19 06:59:53,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:53,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:59:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:59:53,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:59:53,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502573375] [2024-11-19 06:59:53,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502573375] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:59:53,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477819400] [2024-11-19 06:59:53,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:53,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:59:53,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:59:53,960 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) [2024-11-19 06:59:53,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 06:59:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:54,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-19 06:59:54,330 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:59:54,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 06:59:54,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-19 06:59:54,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-19 06:59:54,672 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) (exists ((|v_ULTIMATE.start_dll_circular_insert_~head#1.base_BEFORE_CALL_5| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_dll_circular_insert_~head#1.base_BEFORE_CALL_5|) 0) 0))) is different from true [2024-11-19 06:59:54,724 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-19 06:59:54,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-19 06:59:54,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-19 06:59:54,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-19 06:59:54,830 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 7 not checked. [2024-11-19 06:59:54,830 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:59:54,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477819400] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:59:54,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 06:59:54,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2024-11-19 06:59:54,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407827232] [2024-11-19 06:59:54,987 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 06:59:54,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-19 06:59:54,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:59:54,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-19 06:59:54,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=966, Unknown=1, NotChecked=62, Total=1122 [2024-11-19 06:59:54,989 INFO L87 Difference]: Start difference. First operand 127 states and 145 transitions. Second operand has 30 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-19 06:59:56,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:59:56,042 INFO L93 Difference]: Finished difference Result 172 states and 182 transitions. [2024-11-19 06:59:56,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-19 06:59:56,043 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2024-11-19 06:59:56,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:59:56,044 INFO L225 Difference]: With dead ends: 172 [2024-11-19 06:59:56,044 INFO L226 Difference]: Without dead ends: 172 [2024-11-19 06:59:56,045 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=183, Invalid=1890, Unknown=1, NotChecked=88, Total=2162 [2024-11-19 06:59:56,045 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 354 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 1618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-19 06:59:56,046 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 1104 Invalid, 1618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1435 Invalid, 0 Unknown, 175 Unchecked, 0.7s Time] [2024-11-19 06:59:56,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-11-19 06:59:56,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 135. [2024-11-19 06:59:56,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 92 states have (on average 1.565217391304348) internal successors, (144), 129 states have internal predecessors, (144), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 06:59:56,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 150 transitions. [2024-11-19 06:59:56,049 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 150 transitions. Word has length 46 [2024-11-19 06:59:56,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:59:56,049 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 150 transitions. [2024-11-19 06:59:56,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-19 06:59:56,050 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 150 transitions. [2024-11-19 06:59:56,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-19 06:59:56,050 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:59:56,050 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:59:56,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-19 06:59:56,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-19 06:59:56,251 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 06:59:56,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:59:56,252 INFO L85 PathProgramCache]: Analyzing trace with hash -950364801, now seen corresponding path program 1 times [2024-11-19 06:59:56,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:59:56,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58086288] [2024-11-19 06:59:56,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:56,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:59:56,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:56,325 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 06:59:56,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:59:56,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58086288] [2024-11-19 06:59:56,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58086288] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:59:56,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:59:56,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 06:59:56,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824225631] [2024-11-19 06:59:56,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:59:56,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 06:59:56,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:59:56,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 06:59:56,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:59:56,327 INFO L87 Difference]: Start difference. First operand 135 states and 150 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-19 06:59:56,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:59:56,339 INFO L93 Difference]: Finished difference Result 131 states and 139 transitions. [2024-11-19 06:59:56,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 06:59:56,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2024-11-19 06:59:56,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:59:56,340 INFO L225 Difference]: With dead ends: 131 [2024-11-19 06:59:56,340 INFO L226 Difference]: Without dead ends: 131 [2024-11-19 06:59:56,341 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:59:56,341 INFO L432 NwaCegarLoop]: 127 mSDtfsCounter, 0 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 06:59:56,342 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 243 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 06:59:56,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-11-19 06:59:56,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2024-11-19 06:59:56,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 88 states have (on average 1.5113636363636365) internal successors, (133), 125 states have internal predecessors, (133), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 06:59:56,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 139 transitions. [2024-11-19 06:59:56,346 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 139 transitions. Word has length 47 [2024-11-19 06:59:56,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:59:56,346 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 139 transitions. [2024-11-19 06:59:56,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-19 06:59:56,346 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 139 transitions. [2024-11-19 06:59:56,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-19 06:59:56,347 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:59:56,347 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:59:56,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-19 06:59:56,348 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 06:59:56,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:59:56,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1527893536, now seen corresponding path program 1 times [2024-11-19 06:59:56,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:59:56,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125938523] [2024-11-19 06:59:56,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:56,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:59:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:56,459 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 06:59:56,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:59:56,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125938523] [2024-11-19 06:59:56,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125938523] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:59:56,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:59:56,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 06:59:56,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677978876] [2024-11-19 06:59:56,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:59:56,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 06:59:56,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:59:56,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 06:59:56,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-19 06:59:56,461 INFO L87 Difference]: Start difference. First operand 131 states and 139 transitions. Second operand has 6 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-19 06:59:56,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:59:56,628 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2024-11-19 06:59:56,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 06:59:56,629 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2024-11-19 06:59:56,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:59:56,630 INFO L225 Difference]: With dead ends: 125 [2024-11-19 06:59:56,630 INFO L226 Difference]: Without dead ends: 125 [2024-11-19 06:59:56,630 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-19 06:59:56,630 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 33 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 06:59:56,631 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 305 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 06:59:56,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-19 06:59:56,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2024-11-19 06:59:56,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 88 states have (on average 1.4431818181818181) internal successors, (127), 119 states have internal predecessors, (127), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 06:59:56,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 133 transitions. [2024-11-19 06:59:56,634 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 133 transitions. Word has length 49 [2024-11-19 06:59:56,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:59:56,634 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 133 transitions. [2024-11-19 06:59:56,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-19 06:59:56,634 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 133 transitions. [2024-11-19 06:59:56,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-19 06:59:56,635 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:59:56,635 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:59:56,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-19 06:59:56,635 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 06:59:56,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:59:56,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1527893537, now seen corresponding path program 1 times [2024-11-19 06:59:56,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:59:56,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645435855] [2024-11-19 06:59:56,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:56,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:59:56,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:56,830 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 06:59:56,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:59:56,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645435855] [2024-11-19 06:59:56,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645435855] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:59:56,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774814218] [2024-11-19 06:59:56,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:56,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:59:56,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:59:56,832 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) [2024-11-19 06:59:56,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 06:59:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:57,048 INFO L255 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-19 06:59:57,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:59:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 06:59:57,094 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 06:59:57,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774814218] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:59:57,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 06:59:57,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2024-11-19 06:59:57,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231845854] [2024-11-19 06:59:57,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:59:57,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 06:59:57,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:59:57,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 06:59:57,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-11-19 06:59:57,095 INFO L87 Difference]: Start difference. First operand 125 states and 133 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 06:59:57,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:59:57,115 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2024-11-19 06:59:57,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 06:59:57,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2024-11-19 06:59:57,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:59:57,116 INFO L225 Difference]: With dead ends: 128 [2024-11-19 06:59:57,116 INFO L226 Difference]: Without dead ends: 128 [2024-11-19 06:59:57,116 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-11-19 06:59:57,117 INFO L432 NwaCegarLoop]: 117 mSDtfsCounter, 71 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 06:59:57,117 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 267 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 06:59:57,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-19 06:59:57,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2024-11-19 06:59:57,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 87 states have (on average 1.4367816091954022) internal successors, (125), 118 states have internal predecessors, (125), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 06:59:57,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 131 transitions. [2024-11-19 06:59:57,120 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 131 transitions. Word has length 49 [2024-11-19 06:59:57,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:59:57,120 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 131 transitions. [2024-11-19 06:59:57,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 06:59:57,120 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 131 transitions. [2024-11-19 06:59:57,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-19 06:59:57,121 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:59:57,121 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:59:57,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-19 06:59:57,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:59:57,322 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 06:59:57,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:59:57,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1529033284, now seen corresponding path program 1 times [2024-11-19 06:59:57,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:59:57,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010171465] [2024-11-19 06:59:57,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:57,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:59:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 06:59:57,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:59:57,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010171465] [2024-11-19 06:59:57,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010171465] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:59:57,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:59:57,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 06:59:57,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459921774] [2024-11-19 06:59:57,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:59:57,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 06:59:57,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:59:57,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 06:59:57,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 06:59:57,491 INFO L87 Difference]: Start difference. First operand 124 states and 131 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 06:59:57,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:59:57,518 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2024-11-19 06:59:57,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 06:59:57,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2024-11-19 06:59:57,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:59:57,519 INFO L225 Difference]: With dead ends: 125 [2024-11-19 06:59:57,519 INFO L226 Difference]: Without dead ends: 125 [2024-11-19 06:59:57,520 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-19 06:59:57,520 INFO L432 NwaCegarLoop]: 114 mSDtfsCounter, 64 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 06:59:57,520 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 268 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 06:59:57,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-19 06:59:57,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2024-11-19 06:59:57,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 86 states have (on average 1.4069767441860466) internal successors, (121), 115 states have internal predecessors, (121), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 06:59:57,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 127 transitions. [2024-11-19 06:59:57,523 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 127 transitions. Word has length 49 [2024-11-19 06:59:57,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:59:57,524 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 127 transitions. [2024-11-19 06:59:57,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 06:59:57,524 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 127 transitions. [2024-11-19 06:59:57,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-19 06:59:57,524 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:59:57,524 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:59:57,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-19 06:59:57,525 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 06:59:57,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:59:57,525 INFO L85 PathProgramCache]: Analyzing trace with hash 155389941, now seen corresponding path program 1 times [2024-11-19 06:59:57,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:59:57,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806285136] [2024-11-19 06:59:57,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:57,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:59:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:57,599 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 06:59:57,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:59:57,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806285136] [2024-11-19 06:59:57,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806285136] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:59:57,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:59:57,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 06:59:57,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719286111] [2024-11-19 06:59:57,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:59:57,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 06:59:57,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:59:57,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 06:59:57,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 06:59:57,601 INFO L87 Difference]: Start difference. First operand 121 states and 127 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-19 06:59:57,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:59:57,698 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2024-11-19 06:59:57,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 06:59:57,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-11-19 06:59:57,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:59:57,700 INFO L225 Difference]: With dead ends: 120 [2024-11-19 06:59:57,700 INFO L226 Difference]: Without dead ends: 120 [2024-11-19 06:59:57,700 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 06:59:57,700 INFO L432 NwaCegarLoop]: 113 mSDtfsCounter, 2 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:59:57,701 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 235 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:59:57,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-19 06:59:57,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2024-11-19 06:59:57,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 86 states have (on average 1.3953488372093024) internal successors, (120), 114 states have internal predecessors, (120), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 06:59:57,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 126 transitions. [2024-11-19 06:59:57,704 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 126 transitions. Word has length 50 [2024-11-19 06:59:57,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:59:57,704 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 126 transitions. [2024-11-19 06:59:57,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-19 06:59:57,704 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 126 transitions. [2024-11-19 06:59:57,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-19 06:59:57,704 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:59:57,704 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:59:57,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-19 06:59:57,705 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 06:59:57,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:59:57,705 INFO L85 PathProgramCache]: Analyzing trace with hash 155389942, now seen corresponding path program 1 times [2024-11-19 06:59:57,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:59:57,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169072502] [2024-11-19 06:59:57,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:57,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:59:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 06:59:57,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:59:57,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169072502] [2024-11-19 06:59:57,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169072502] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:59:57,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:59:57,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 06:59:57,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488437792] [2024-11-19 06:59:57,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:59:57,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 06:59:57,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:59:57,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 06:59:57,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 06:59:57,830 INFO L87 Difference]: Start difference. First operand 120 states and 126 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-19 06:59:57,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:59:57,928 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2024-11-19 06:59:57,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 06:59:57,929 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-11-19 06:59:57,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:59:57,929 INFO L225 Difference]: With dead ends: 119 [2024-11-19 06:59:57,929 INFO L226 Difference]: Without dead ends: 119 [2024-11-19 06:59:57,929 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 06:59:57,930 INFO L432 NwaCegarLoop]: 112 mSDtfsCounter, 2 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:59:57,930 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 235 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:59:57,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-19 06:59:57,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2024-11-19 06:59:57,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 86 states have (on average 1.3837209302325582) internal successors, (119), 113 states have internal predecessors, (119), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 06:59:57,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 125 transitions. [2024-11-19 06:59:57,933 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 125 transitions. Word has length 50 [2024-11-19 06:59:57,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:59:57,933 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 125 transitions. [2024-11-19 06:59:57,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-19 06:59:57,933 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 125 transitions. [2024-11-19 06:59:57,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-19 06:59:57,934 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:59:57,934 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:59:57,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-19 06:59:57,934 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 06:59:57,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:59:57,934 INFO L85 PathProgramCache]: Analyzing trace with hash 522120915, now seen corresponding path program 1 times [2024-11-19 06:59:57,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:59:57,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013519311] [2024-11-19 06:59:57,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:57,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:59:57,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 06:59:58,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:59:58,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013519311] [2024-11-19 06:59:58,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013519311] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:59:58,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:59:58,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 06:59:58,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434182780] [2024-11-19 06:59:58,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:59:58,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 06:59:58,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:59:58,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 06:59:58,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-19 06:59:58,154 INFO L87 Difference]: Start difference. First operand 119 states and 125 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-19 06:59:58,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:59:58,303 INFO L93 Difference]: Finished difference Result 113 states and 119 transitions. [2024-11-19 06:59:58,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 06:59:58,303 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2024-11-19 06:59:58,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:59:58,304 INFO L225 Difference]: With dead ends: 113 [2024-11-19 06:59:58,304 INFO L226 Difference]: Without dead ends: 113 [2024-11-19 06:59:58,304 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-19 06:59:58,308 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 26 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:59:58,309 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 321 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:59:58,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-19 06:59:58,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2024-11-19 06:59:58,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 86 states have (on average 1.313953488372093) internal successors, (113), 107 states have internal predecessors, (113), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 06:59:58,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 119 transitions. [2024-11-19 06:59:58,312 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 119 transitions. Word has length 51 [2024-11-19 06:59:58,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:59:58,312 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 119 transitions. [2024-11-19 06:59:58,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-19 06:59:58,312 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 119 transitions. [2024-11-19 06:59:58,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-19 06:59:58,313 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:59:58,313 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:59:58,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-19 06:59:58,313 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 06:59:58,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:59:58,314 INFO L85 PathProgramCache]: Analyzing trace with hash -752973931, now seen corresponding path program 1 times [2024-11-19 06:59:58,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:59:58,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399632956] [2024-11-19 06:59:58,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:58,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:59:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:59,607 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:59:59,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:59:59,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399632956] [2024-11-19 06:59:59,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399632956] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:59:59,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516535720] [2024-11-19 06:59:59,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:59:59,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:59:59,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:59:59,610 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) [2024-11-19 06:59:59,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 06:59:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:59:59,904 INFO L255 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-19 06:59:59,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:59:59,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 07:00:00,083 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 07:00:00,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 07:00:00,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 07:00:00,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-19 07:00:00,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-19 07:00:00,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 24 [2024-11-19 07:00:00,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 17 [2024-11-19 07:00:00,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-19 07:00:00,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:00:00,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 34 [2024-11-19 07:00:00,876 INFO L349 Elim1Store]: treesize reduction 76, result has 36.1 percent of original size [2024-11-19 07:00:00,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 52 [2024-11-19 07:00:01,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 49 [2024-11-19 07:00:01,059 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 07:00:01,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2024-11-19 07:00:01,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:00:01,253 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 07:00:01,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2024-11-19 07:00:01,628 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:00:01,628 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:00:02,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516535720] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:00:02,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:00:02,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 31] total 52 [2024-11-19 07:00:02,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648104457] [2024-11-19 07:00:02,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:00:02,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-19 07:00:02,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:00:02,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-19 07:00:02,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=3588, Unknown=0, NotChecked=0, Total=3782 [2024-11-19 07:00:02,176 INFO L87 Difference]: Start difference. First operand 113 states and 119 transitions. Second operand has 53 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 45 states have internal predecessors, (87), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-19 07:00:05,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:00:05,044 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2024-11-19 07:00:05,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-19 07:00:05,045 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 45 states have internal predecessors, (87), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2024-11-19 07:00:05,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:00:05,046 INFO L225 Difference]: With dead ends: 114 [2024-11-19 07:00:05,046 INFO L226 Difference]: Without dead ends: 114 [2024-11-19 07:00:05,048 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=451, Invalid=6689, Unknown=0, NotChecked=0, Total=7140 [2024-11-19 07:00:05,048 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 143 mSDsluCounter, 1908 mSDsCounter, 0 mSdLazyCounter, 2842 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 1973 SdHoareTripleChecker+Invalid, 2865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-19 07:00:05,051 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 1973 Invalid, 2865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2842 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-19 07:00:05,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-19 07:00:05,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2024-11-19 07:00:05,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 86 states have (on average 1.302325581395349) internal successors, (112), 106 states have internal predecessors, (112), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 07:00:05,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions. [2024-11-19 07:00:05,055 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 53 [2024-11-19 07:00:05,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:00:05,055 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 118 transitions. [2024-11-19 07:00:05,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 45 states have internal predecessors, (87), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-19 07:00:05,055 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions. [2024-11-19 07:00:05,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-19 07:00:05,056 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:00:05,056 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:00:05,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-19 07:00:05,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-19 07:00:05,257 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 07:00:05,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:00:05,257 INFO L85 PathProgramCache]: Analyzing trace with hash -752973930, now seen corresponding path program 1 times [2024-11-19 07:00:05,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:00:05,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078923327] [2024-11-19 07:00:05,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:00:05,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:00:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:00:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:00:07,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:00:07,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078923327] [2024-11-19 07:00:07,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078923327] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:00:07,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383368703] [2024-11-19 07:00:07,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:00:07,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:00:07,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:00:07,398 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) [2024-11-19 07:00:07,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 07:00:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:00:07,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 124 conjuncts are in the unsatisfiable core [2024-11-19 07:00:07,665 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:00:07,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 07:00:07,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 07:00:07,955 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 07:00:07,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-19 07:00:07,969 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 07:00:07,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 07:00:08,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 07:00:08,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 07:00:08,179 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-19 07:00:08,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 50 [2024-11-19 07:00:08,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2024-11-19 07:00:08,325 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-19 07:00:08,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2024-11-19 07:00:08,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:00:08,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-19 07:00:08,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-19 07:00:08,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 24 [2024-11-19 07:00:08,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 17 [2024-11-19 07:00:08,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-19 07:00:08,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2024-11-19 07:00:08,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-19 07:00:08,825 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-19 07:00:08,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-19 07:00:08,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-19 07:00:08,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 34 [2024-11-19 07:00:08,850 INFO L349 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2024-11-19 07:00:08,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2024-11-19 07:00:09,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 43 [2024-11-19 07:00:09,054 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 07:00:09,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2024-11-19 07:00:09,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2024-11-19 07:00:09,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-19 07:00:09,266 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:00:09,266 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:00:09,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383368703] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:00:09,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:00:09,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 48 [2024-11-19 07:00:09,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665946757] [2024-11-19 07:00:09,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:00:09,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-19 07:00:09,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:00:09,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-19 07:00:09,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2815, Unknown=0, NotChecked=0, Total=2970 [2024-11-19 07:00:09,946 INFO L87 Difference]: Start difference. First operand 112 states and 118 transitions. Second operand has 49 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 41 states have internal predecessors, (80), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-19 07:00:12,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:00:12,982 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2024-11-19 07:00:12,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-19 07:00:12,983 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 41 states have internal predecessors, (80), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2024-11-19 07:00:12,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:00:12,983 INFO L225 Difference]: With dead ends: 112 [2024-11-19 07:00:12,983 INFO L226 Difference]: Without dead ends: 112 [2024-11-19 07:00:12,985 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=316, Invalid=5234, Unknown=0, NotChecked=0, Total=5550 [2024-11-19 07:00:12,985 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 108 mSDsluCounter, 1716 mSDsCounter, 0 mSdLazyCounter, 2586 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1783 SdHoareTripleChecker+Invalid, 2591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 2586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-19 07:00:12,985 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 1783 Invalid, 2591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 2586 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-19 07:00:12,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-19 07:00:12,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2024-11-19 07:00:12,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 105 states have internal predecessors, (111), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 07:00:12,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 117 transitions. [2024-11-19 07:00:12,988 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 117 transitions. Word has length 53 [2024-11-19 07:00:12,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:00:12,988 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 117 transitions. [2024-11-19 07:00:12,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 41 states have internal predecessors, (80), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-19 07:00:12,989 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 117 transitions. [2024-11-19 07:00:12,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-19 07:00:12,989 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:00:12,990 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:00:13,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-19 07:00:13,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-19 07:00:13,190 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 07:00:13,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:00:13,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1964750438, now seen corresponding path program 1 times [2024-11-19 07:00:13,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:00:13,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696856594] [2024-11-19 07:00:13,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:00:13,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:00:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:00:13,432 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 07:00:13,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:00:13,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696856594] [2024-11-19 07:00:13,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696856594] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:00:13,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441557771] [2024-11-19 07:00:13,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:00:13,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:00:13,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:00:13,436 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 07:00:13,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 07:00:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:00:13,721 INFO L255 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-19 07:00:13,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:00:13,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 07:00:13,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-19 07:00:13,877 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-19 07:00:13,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 21 [2024-11-19 07:00:13,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-19 07:00:13,966 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 07:00:13,966 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:00:14,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2024-11-19 07:00:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 07:00:14,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441557771] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 07:00:14,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 07:00:14,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15, 15] total 23 [2024-11-19 07:00:14,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488960447] [2024-11-19 07:00:14,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 07:00:14,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-19 07:00:14,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:00:14,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-19 07:00:14,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2024-11-19 07:00:14,304 INFO L87 Difference]: Start difference. First operand 111 states and 117 transitions. Second operand has 24 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 19 states have internal predecessors, (88), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-19 07:00:14,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:00:14,878 INFO L93 Difference]: Finished difference Result 137 states and 144 transitions. [2024-11-19 07:00:14,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 07:00:14,879 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 19 states have internal predecessors, (88), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 57 [2024-11-19 07:00:14,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:00:14,879 INFO L225 Difference]: With dead ends: 137 [2024-11-19 07:00:14,879 INFO L226 Difference]: Without dead ends: 137 [2024-11-19 07:00:14,880 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2024-11-19 07:00:14,880 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 194 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-19 07:00:14,880 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 895 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-19 07:00:14,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-19 07:00:14,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 114. [2024-11-19 07:00:14,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 90 states have (on average 1.2777777777777777) internal successors, (115), 108 states have internal predecessors, (115), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 07:00:14,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 121 transitions. [2024-11-19 07:00:14,884 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 121 transitions. Word has length 57 [2024-11-19 07:00:14,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:00:14,884 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 121 transitions. [2024-11-19 07:00:14,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 19 states have internal predecessors, (88), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-19 07:00:14,884 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 121 transitions. [2024-11-19 07:00:14,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-19 07:00:14,885 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:00:14,885 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:00:14,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-19 07:00:15,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:00:15,090 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 07:00:15,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:00:15,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1964750437, now seen corresponding path program 1 times [2024-11-19 07:00:15,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:00:15,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527115886] [2024-11-19 07:00:15,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:00:15,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:00:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:00:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 07:00:15,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:00:15,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527115886] [2024-11-19 07:00:15,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527115886] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:00:15,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376933192] [2024-11-19 07:00:15,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:00:15,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:00:15,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:00:15,886 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 07:00:15,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 07:00:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:00:16,139 INFO L255 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-19 07:00:16,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:00:16,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 07:00:16,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-19 07:00:16,530 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-19 07:00:16,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2024-11-19 07:00:16,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-19 07:00:16,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-11-19 07:00:16,808 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 07:00:16,808 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:00:17,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376933192] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:00:17,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:00:17,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 33 [2024-11-19 07:00:17,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582551528] [2024-11-19 07:00:17,060 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:00:17,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-19 07:00:17,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:00:17,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-19 07:00:17,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1300, Unknown=0, NotChecked=0, Total=1406 [2024-11-19 07:00:17,061 INFO L87 Difference]: Start difference. First operand 114 states and 121 transitions. Second operand has 34 states, 32 states have (on average 2.84375) internal successors, (91), 29 states have internal predecessors, (91), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-19 07:00:18,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:00:18,501 INFO L93 Difference]: Finished difference Result 135 states and 143 transitions. [2024-11-19 07:00:18,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-19 07:00:18,502 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.84375) internal successors, (91), 29 states have internal predecessors, (91), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 57 [2024-11-19 07:00:18,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:00:18,502 INFO L225 Difference]: With dead ends: 135 [2024-11-19 07:00:18,502 INFO L226 Difference]: Without dead ends: 135 [2024-11-19 07:00:18,503 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=254, Invalid=2938, Unknown=0, NotChecked=0, Total=3192 [2024-11-19 07:00:18,504 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 150 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 1812 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1335 SdHoareTripleChecker+Invalid, 1818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-19 07:00:18,504 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 1335 Invalid, 1818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1812 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-19 07:00:18,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-19 07:00:18,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 116. [2024-11-19 07:00:18,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 92 states have (on average 1.2717391304347827) internal successors, (117), 110 states have internal predecessors, (117), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 07:00:18,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 123 transitions. [2024-11-19 07:00:18,507 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 123 transitions. Word has length 57 [2024-11-19 07:00:18,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:00:18,508 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 123 transitions. [2024-11-19 07:00:18,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.84375) internal successors, (91), 29 states have internal predecessors, (91), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-19 07:00:18,508 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 123 transitions. [2024-11-19 07:00:18,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-19 07:00:18,508 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:00:18,509 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:00:18,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-19 07:00:18,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-19 07:00:18,709 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 07:00:18,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:00:18,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1447807039, now seen corresponding path program 1 times [2024-11-19 07:00:18,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:00:18,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592469044] [2024-11-19 07:00:18,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:00:18,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:00:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:00:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 07:00:19,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:00:19,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592469044] [2024-11-19 07:00:19,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592469044] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:00:19,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080029775] [2024-11-19 07:00:19,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:00:19,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:00:19,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:00:19,005 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 07:00:19,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-19 07:00:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:00:19,319 INFO L255 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-19 07:00:19,322 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:00:19,553 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 07:00:19,555 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 07:00:19,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2024-11-19 07:00:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 07:00:19,598 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:00:19,651 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 07:00:19,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2024-11-19 07:00:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 07:00:19,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080029775] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 07:00:19,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 07:00:19,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 13] total 27 [2024-11-19 07:00:19,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113000966] [2024-11-19 07:00:19,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 07:00:19,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-19 07:00:19,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:00:19,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-19 07:00:19,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2024-11-19 07:00:19,796 INFO L87 Difference]: Start difference. First operand 116 states and 123 transitions. Second operand has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 24 states have internal predecessors, (85), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-19 07:00:23,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-19 07:00:27,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-19 07:00:31,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-19 07:00:35,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-19 07:00:39,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-19 07:00:43,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-19 07:00:47,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-19 07:00:48,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:00:48,279 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2024-11-19 07:00:48,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-19 07:00:48,279 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 24 states have internal predecessors, (85), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 58 [2024-11-19 07:00:48,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:00:48,280 INFO L225 Difference]: With dead ends: 92 [2024-11-19 07:00:48,280 INFO L226 Difference]: Without dead ends: 92 [2024-11-19 07:00:48,280 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2024-11-19 07:00:48,281 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 115 mSDsluCounter, 1222 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 1 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.3s IncrementalHoareTripleChecker+Time [2024-11-19 07:00:48,281 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 1286 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 618 Invalid, 7 Unknown, 0 Unchecked, 28.3s Time] [2024-11-19 07:00:48,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-19 07:00:48,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-11-19 07:00:48,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 72 states have (on average 1.2638888888888888) internal successors, (91), 86 states have internal predecessors, (91), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 07:00:48,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2024-11-19 07:00:48,284 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 58 [2024-11-19 07:00:48,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:00:48,284 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2024-11-19 07:00:48,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 24 states have internal predecessors, (85), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-19 07:00:48,285 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2024-11-19 07:00:48,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-19 07:00:48,285 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:00:48,285 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:00:48,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-19 07:00:48,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-19 07:00:48,486 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-19 07:00:48,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:00:48,486 INFO L85 PathProgramCache]: Analyzing trace with hash -2042191746, now seen corresponding path program 1 times [2024-11-19 07:00:48,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:00:48,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178102546] [2024-11-19 07:00:48,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:00:48,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:00:48,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:00:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:00:51,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:00:51,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178102546] [2024-11-19 07:00:51,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178102546] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:00:51,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473756242] [2024-11-19 07:00:51,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:00:51,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:00:51,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:00:51,294 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 07:00:51,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-19 07:00:51,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:00:51,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 137 conjuncts are in the unsatisfiable core [2024-11-19 07:00:51,785 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:00:51,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 07:00:51,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 07:00:52,104 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 07:00:52,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 07:00:52,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-19 07:00:52,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 07:00:52,346 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-19 07:00:52,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 43 [2024-11-19 07:00:52,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2024-11-19 07:00:52,499 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-19 07:00:52,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2024-11-19 07:00:52,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:00:52,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-19 07:00:52,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-19 07:00:52,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2024-11-19 07:00:52,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-19 07:00:52,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-19 07:00:52,732 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 07:00:52,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 12 [2024-11-19 07:00:53,060 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-19 07:00:53,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 35 [2024-11-19 07:00:53,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2024-11-19 07:00:53,081 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-19 07:00:53,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-19 07:00:53,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-19 07:00:53,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:00:53,586 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 07:00:53,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 23 [2024-11-19 07:00:53,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2024-11-19 07:00:53,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-19 07:00:53,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-19 07:00:54,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-19 07:00:54,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 07:00:54,280 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:00:54,280 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:00:54,406 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3696 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store |c_#memory_int#2| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_3696) (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8)))) is different from false [2024-11-19 07:00:55,197 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3692 (Array Int Int)) (v_ArrVal_3695 (Array Int Int)) (|v_ULTIMATE.start_dll_circular_insert_#t~mem10#1.offset_23| Int) (v_ArrVal_3696 (Array Int Int))) (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|))) (or (not (= v_ArrVal_3692 (store (select |c_#memory_int#2| .cse0) |v_ULTIMATE.start_dll_circular_insert_#t~mem10#1.offset_23| (select v_ArrVal_3692 |v_ULTIMATE.start_dll_circular_insert_#t~mem10#1.offset_23|)))) (< |v_ULTIMATE.start_dll_circular_insert_#t~mem10#1.offset_23| 0) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store (store |c_#memory_int#2| .cse0 v_ArrVal_3692) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_3695) (select (select |c_#memory_$Pointer$#2.base| .cse0) |v_ULTIMATE.start_dll_circular_insert_#t~mem10#1.offset_23|) v_ArrVal_3696) (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8))) (< (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|) |v_ULTIMATE.start_dll_circular_insert_#t~mem10#1.offset_23|)))) is different from false [2024-11-19 07:00:55,216 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3692 (Array Int Int)) (v_ArrVal_3695 (Array Int Int)) (|v_ULTIMATE.start_dll_circular_insert_#t~mem10#1.offset_23| Int) (v_ArrVal_3696 (Array Int Int))) (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|))) (or (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store (store |c_#memory_int#2| .cse0 v_ArrVal_3692) |c_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base| v_ArrVal_3695) (select (select |c_#memory_$Pointer$#2.base| .cse0) |v_ULTIMATE.start_dll_circular_insert_#t~mem10#1.offset_23|) v_ArrVal_3696) (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8))) (not (= v_ArrVal_3692 (store (select |c_#memory_int#2| .cse0) |v_ULTIMATE.start_dll_circular_insert_#t~mem10#1.offset_23| (select v_ArrVal_3692 |v_ULTIMATE.start_dll_circular_insert_#t~mem10#1.offset_23|)))) (< |v_ULTIMATE.start_dll_circular_insert_#t~mem10#1.offset_23| 0) (< (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|) |v_ULTIMATE.start_dll_circular_insert_#t~mem10#1.offset_23|)))) is different from false [2024-11-19 07:00:55,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473756242] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:00:55,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:00:55,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 36] total 70 [2024-11-19 07:00:55,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833348212] [2024-11-19 07:00:55,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:00:55,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-19 07:00:55,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:00:55,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-19 07:00:55,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=5852, Unknown=25, NotChecked=468, Total=6642 [2024-11-19 07:00:55,465 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand has 70 states, 66 states have (on average 1.5606060606060606) internal successors, (103), 61 states have internal predecessors, (103), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)