./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.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/sll2c_remove_all_reverse.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 3340815bef7e21ae2d4803d7059577c1761bb3b7b4bb24b2b34d5d0d0054fd10 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 07:02:00,709 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 07:02:00,762 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 07:02:00,767 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 07:02:00,768 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 07:02:00,821 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 07:02:00,822 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 07:02:00,822 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 07:02:00,823 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 07:02:00,823 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 07:02:00,824 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 07:02:00,837 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 07:02:00,838 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 07:02:00,839 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 07:02:00,840 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 07:02:00,840 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 07:02:00,840 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 07:02:00,840 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 07:02:00,840 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 07:02:00,841 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 07:02:00,841 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 07:02:00,844 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 07:02:00,844 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 07:02:00,844 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 07:02:00,844 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 07:02:00,844 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 07:02:00,845 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 07:02:00,845 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 07:02:00,845 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 07:02:00,845 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 07:02:00,845 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 07:02:00,845 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 07:02:00,846 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 07:02:00,846 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 07:02:00,846 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 07:02:00,846 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 07:02:00,846 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 07:02:00,846 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 07:02:00,846 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 07:02:00,846 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 07:02:00,847 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 07:02:00,848 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 07:02:00,848 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3340815bef7e21ae2d4803d7059577c1761bb3b7b4bb24b2b34d5d0d0054fd10 [2024-11-19 07:02:01,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 07:02:01,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 07:02:01,080 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 07:02:01,081 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 07:02:01,082 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 07:02:01,083 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.i [2024-11-19 07:02:02,493 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 07:02:02,692 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 07:02:02,693 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.i [2024-11-19 07:02:02,728 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08ad39ee4/081484774fef4fec95364a235d95ea97/FLAG4857bd7ba [2024-11-19 07:02:03,057 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08ad39ee4/081484774fef4fec95364a235d95ea97 [2024-11-19 07:02:03,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 07:02:03,061 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 07:02:03,062 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 07:02:03,062 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 07:02:03,067 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 07:02:03,068 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:02:03" (1/1) ... [2024-11-19 07:02:03,069 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b11178e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:03, skipping insertion in model container [2024-11-19 07:02:03,069 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:02:03" (1/1) ... [2024-11-19 07:02:03,095 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 07:02:03,449 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 07:02:03,460 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 07:02:03,498 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 07:02:03,524 INFO L204 MainTranslator]: Completed translation [2024-11-19 07:02:03,524 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:03 WrapperNode [2024-11-19 07:02:03,525 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 07:02:03,526 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 07:02:03,526 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 07:02:03,526 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 07:02:03,534 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:03" (1/1) ... [2024-11-19 07:02:03,550 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:03" (1/1) ... [2024-11-19 07:02:03,570 INFO L138 Inliner]: procedures = 126, calls = 37, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 128 [2024-11-19 07:02:03,571 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 07:02:03,571 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 07:02:03,571 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 07:02:03,572 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 07:02:03,580 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:03" (1/1) ... [2024-11-19 07:02:03,580 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:03" (1/1) ... [2024-11-19 07:02:03,583 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:03" (1/1) ... [2024-11-19 07:02:03,605 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 9, 9]. 45 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0]. The 6 writes are split as follows [0, 1, 5]. [2024-11-19 07:02:03,605 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:03" (1/1) ... [2024-11-19 07:02:03,605 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:03" (1/1) ... [2024-11-19 07:02:03,620 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:03" (1/1) ... [2024-11-19 07:02:03,623 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:03" (1/1) ... [2024-11-19 07:02:03,624 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:03" (1/1) ... [2024-11-19 07:02:03,626 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:03" (1/1) ... [2024-11-19 07:02:03,628 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 07:02:03,629 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 07:02:03,629 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 07:02:03,629 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 07:02:03,630 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:03" (1/1) ... [2024-11-19 07:02:03,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 07:02:03,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:02:03,665 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 07:02:03,670 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 07:02:03,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 07:02:03,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 07:02:03,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-19 07:02:03,715 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-11-19 07:02:03,716 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-11-19 07:02:03,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 07:02:03,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 07:02:03,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-19 07:02:03,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-19 07:02:03,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-19 07:02:03,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-19 07:02:03,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-19 07:02:03,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-19 07:02:03,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-19 07:02:03,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-19 07:02:03,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-19 07:02:03,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-19 07:02:03,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-19 07:02:03,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 07:02:03,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 07:02:03,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-19 07:02:03,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 07:02:03,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 07:02:03,862 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 07:02:03,864 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 07:02:04,161 INFO L? ?]: Removed 102 outVars from TransFormulas that were not future-live. [2024-11-19 07:02:04,161 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 07:02:04,175 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 07:02:04,176 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-19 07:02:04,176 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:02:04 BoogieIcfgContainer [2024-11-19 07:02:04,177 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 07:02:04,179 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 07:02:04,180 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 07:02:04,183 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 07:02:04,183 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:02:03" (1/3) ... [2024-11-19 07:02:04,183 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35080961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:02:04, skipping insertion in model container [2024-11-19 07:02:04,184 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:03" (2/3) ... [2024-11-19 07:02:04,184 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35080961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:02:04, skipping insertion in model container [2024-11-19 07:02:04,184 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:02:04" (3/3) ... [2024-11-19 07:02:04,185 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all_reverse.i [2024-11-19 07:02:04,198 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 07:02:04,199 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2024-11-19 07:02:04,232 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 07:02:04,237 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;@9cbeafe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 07:02:04,238 INFO L334 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2024-11-19 07:02:04,242 INFO L276 IsEmpty]: Start isEmpty. Operand has 100 states, 54 states have (on average 2.0) internal successors, (108), 96 states have internal predecessors, (108), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 07:02:04,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-19 07:02:04,247 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:04,247 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-19 07:02:04,248 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:04,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:04,252 INFO L85 PathProgramCache]: Analyzing trace with hash 894444181, now seen corresponding path program 1 times [2024-11-19 07:02:04,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:04,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199030276] [2024-11-19 07:02:04,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:04,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:04,436 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 07:02:04,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:04,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199030276] [2024-11-19 07:02:04,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199030276] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:02:04,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:02:04,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 07:02:04,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48628292] [2024-11-19 07:02:04,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:02:04,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 07:02:04,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:04,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 07:02:04,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 07:02:04,513 INFO L87 Difference]: Start difference. First operand has 100 states, 54 states have (on average 2.0) internal successors, (108), 96 states have internal predecessors, (108), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 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 07:02:04,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:04,676 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2024-11-19 07:02:04,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 07:02:04,679 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 07:02:04,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:04,694 INFO L225 Difference]: With dead ends: 97 [2024-11-19 07:02:04,695 INFO L226 Difference]: Without dead ends: 94 [2024-11-19 07:02:04,696 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 07:02:04,699 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 2 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:04,700 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 152 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 07:02:04,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-19 07:02:04,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2024-11-19 07:02:04,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 51 states have (on average 1.8627450980392157) internal successors, (95), 90 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 07:02:04,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2024-11-19 07:02:04,732 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 6 [2024-11-19 07:02:04,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:04,733 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2024-11-19 07:02:04,733 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 07:02:04,733 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2024-11-19 07:02:04,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-19 07:02:04,734 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:04,734 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-19 07:02:04,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 07:02:04,734 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:04,735 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:04,735 INFO L85 PathProgramCache]: Analyzing trace with hash 894444182, now seen corresponding path program 1 times [2024-11-19 07:02:04,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:04,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467900745] [2024-11-19 07:02:04,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:04,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:04,896 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 07:02:04,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:04,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467900745] [2024-11-19 07:02:04,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467900745] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:02:04,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:02:04,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 07:02:04,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340643796] [2024-11-19 07:02:04,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:02:04,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 07:02:04,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:04,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 07:02:04,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 07:02:04,899 INFO L87 Difference]: Start difference. First operand 94 states and 99 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 07:02:04,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:04,962 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2024-11-19 07:02:04,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 07:02:04,963 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 07:02:04,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:04,964 INFO L225 Difference]: With dead ends: 92 [2024-11-19 07:02:04,965 INFO L226 Difference]: Without dead ends: 92 [2024-11-19 07:02:04,966 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 07:02:04,967 INFO L432 NwaCegarLoop]: 93 mSDtfsCounter, 2 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:04,968 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 153 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 07:02:04,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-19 07:02:04,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-11-19 07:02:04,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 88 states have internal predecessors, (93), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 07:02:04,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2024-11-19 07:02:04,977 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 6 [2024-11-19 07:02:04,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:04,977 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2024-11-19 07:02:04,978 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 07:02:04,978 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2024-11-19 07:02:04,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-19 07:02:04,978 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:04,979 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:04,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 07:02:04,979 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:04,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:04,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1446088151, now seen corresponding path program 1 times [2024-11-19 07:02:04,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:04,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332099461] [2024-11-19 07:02:04,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:04,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:04,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:05,038 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 07:02:05,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:05,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332099461] [2024-11-19 07:02:05,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332099461] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:02:05,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:02:05,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 07:02:05,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898010223] [2024-11-19 07:02:05,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:02:05,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 07:02:05,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:05,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 07:02:05,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 07:02:05,040 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-19 07:02:05,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:05,057 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2024-11-19 07:02:05,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 07:02:05,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-19 07:02:05,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:05,058 INFO L225 Difference]: With dead ends: 99 [2024-11-19 07:02:05,058 INFO L226 Difference]: Without dead ends: 99 [2024-11-19 07:02:05,059 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 07:02:05,059 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 5 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 185 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 07:02:05,060 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 185 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 07:02:05,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-19 07:02:05,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 93. [2024-11-19 07:02:05,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 52 states have (on average 1.8076923076923077) internal successors, (94), 89 states have internal predecessors, (94), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 07:02:05,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2024-11-19 07:02:05,068 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 13 [2024-11-19 07:02:05,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:05,068 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2024-11-19 07:02:05,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-19 07:02:05,069 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2024-11-19 07:02:05,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-19 07:02:05,069 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:05,069 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:05,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 07:02:05,070 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:05,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:05,070 INFO L85 PathProgramCache]: Analyzing trace with hash -38888420, now seen corresponding path program 1 times [2024-11-19 07:02:05,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:05,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721886000] [2024-11-19 07:02:05,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:05,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:05,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:05,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 07:02:05,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:05,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721886000] [2024-11-19 07:02:05,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721886000] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:02:05,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:02:05,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 07:02:05,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782059966] [2024-11-19 07:02:05,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:02:05,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 07:02:05,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:05,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 07:02:05,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-19 07:02:05,185 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 07:02:05,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:05,312 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2024-11-19 07:02:05,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 07:02:05,312 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 22 [2024-11-19 07:02:05,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:05,313 INFO L225 Difference]: With dead ends: 92 [2024-11-19 07:02:05,313 INFO L226 Difference]: Without dead ends: 92 [2024-11-19 07:02:05,313 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 07:02:05,314 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 2 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:05,315 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 281 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 07:02:05,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-19 07:02:05,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-11-19 07:02:05,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 88 states have internal predecessors, (93), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 07:02:05,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2024-11-19 07:02:05,319 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 22 [2024-11-19 07:02:05,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:05,319 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2024-11-19 07:02:05,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 07:02:05,319 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2024-11-19 07:02:05,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-19 07:02:05,320 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:05,320 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:05,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 07:02:05,320 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:05,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:05,321 INFO L85 PathProgramCache]: Analyzing trace with hash -38888419, now seen corresponding path program 1 times [2024-11-19 07:02:05,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:05,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896396734] [2024-11-19 07:02:05,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:05,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:05,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 07:02:05,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:05,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896396734] [2024-11-19 07:02:05,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896396734] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:02:05,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:02:05,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 07:02:05,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313171959] [2024-11-19 07:02:05,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:02:05,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 07:02:05,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:05,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 07:02:05,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-19 07:02:05,500 INFO L87 Difference]: Start difference. First operand 92 states and 97 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 07:02:05,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:05,644 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2024-11-19 07:02:05,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 07:02:05,644 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 22 [2024-11-19 07:02:05,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:05,645 INFO L225 Difference]: With dead ends: 91 [2024-11-19 07:02:05,645 INFO L226 Difference]: Without dead ends: 91 [2024-11-19 07:02:05,645 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 07:02:05,648 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 1 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:05,649 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 305 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 07:02:05,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-19 07:02:05,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2024-11-19 07:02:05,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 52 states have (on average 1.7692307692307692) internal successors, (92), 87 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 07:02:05,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2024-11-19 07:02:05,653 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 22 [2024-11-19 07:02:05,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:05,653 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2024-11-19 07:02:05,653 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 07:02:05,654 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2024-11-19 07:02:05,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-19 07:02:05,654 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:05,654 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:05,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 07:02:05,654 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:05,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:05,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1116238533, now seen corresponding path program 1 times [2024-11-19 07:02:05,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:05,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102479819] [2024-11-19 07:02:05,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:05,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:05,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:05,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 07:02:05,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:05,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102479819] [2024-11-19 07:02:05,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102479819] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:05,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264219288] [2024-11-19 07:02:05,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:05,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:05,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:02:05,874 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 07:02:05,876 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 07:02:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:05,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-19 07:02:05,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:02:06,000 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 07:02:06,068 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 07:02:06,068 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 07:02:06,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 07:02:06,121 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:02:06,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 07:02:06,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264219288] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 07:02:06,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 07:02:06,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 17 [2024-11-19 07:02:06,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145627783] [2024-11-19 07:02:06,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 07:02:06,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 07:02:06,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:06,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 07:02:06,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-11-19 07:02:06,413 INFO L87 Difference]: Start difference. First operand 91 states and 96 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-19 07:02:06,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:06,719 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2024-11-19 07:02:06,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 07:02:06,720 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2024-11-19 07:02:06,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:06,721 INFO L225 Difference]: With dead ends: 90 [2024-11-19 07:02:06,723 INFO L226 Difference]: Without dead ends: 90 [2024-11-19 07:02:06,723 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2024-11-19 07:02:06,723 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 2 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:06,724 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 591 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 07:02:06,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-19 07:02:06,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2024-11-19 07:02:06,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 52 states have (on average 1.75) internal successors, (91), 86 states have internal predecessors, (91), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 07:02:06,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2024-11-19 07:02:06,734 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 25 [2024-11-19 07:02:06,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:06,734 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2024-11-19 07:02:06,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-19 07:02:06,734 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2024-11-19 07:02:06,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-19 07:02:06,735 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:06,735 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:06,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-19 07:02:06,935 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 07:02:06,936 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:06,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:06,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1116238534, now seen corresponding path program 1 times [2024-11-19 07:02:06,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:06,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010187798] [2024-11-19 07:02:06,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:06,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:06,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:07,283 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 07:02:07,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:07,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010187798] [2024-11-19 07:02:07,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010187798] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:07,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938862582] [2024-11-19 07:02:07,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:07,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:07,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:02:07,286 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 07:02:07,287 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 07:02:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:07,363 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-19 07:02:07,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:02:07,373 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 07:02:07,376 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 07:02:07,482 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 07:02:07,482 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 07:02:07,486 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 07:02:07,520 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 07:02:07,521 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:02:07,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938862582] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:07,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:02:07,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2024-11-19 07:02:07,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351364152] [2024-11-19 07:02:07,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:02:07,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 07:02:07,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:07,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 07:02:07,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-19 07:02:07,651 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 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 07:02:08,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:08,048 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2024-11-19 07:02:08,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 07:02:08,049 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 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 25 [2024-11-19 07:02:08,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:08,049 INFO L225 Difference]: With dead ends: 91 [2024-11-19 07:02:08,049 INFO L226 Difference]: Without dead ends: 91 [2024-11-19 07:02:08,050 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 07:02:08,050 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 1 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:08,051 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 455 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 07:02:08,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-19 07:02:08,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2024-11-19 07:02:08,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 52 states have (on average 1.7307692307692308) internal successors, (90), 85 states have internal predecessors, (90), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 07:02:08,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2024-11-19 07:02:08,055 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 25 [2024-11-19 07:02:08,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:08,055 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2024-11-19 07:02:08,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 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 07:02:08,055 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2024-11-19 07:02:08,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-19 07:02:08,056 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:08,056 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:08,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 07:02:08,260 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 07:02:08,261 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:08,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:08,263 INFO L85 PathProgramCache]: Analyzing trace with hash 265662500, now seen corresponding path program 1 times [2024-11-19 07:02:08,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:08,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316479678] [2024-11-19 07:02:08,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:08,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:08,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 07:02:08,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:08,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316479678] [2024-11-19 07:02:08,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316479678] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:08,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068494825] [2024-11-19 07:02:08,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:08,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:08,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:02:08,413 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 07:02:08,414 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 07:02:08,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:08,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-19 07:02:08,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:02:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 07:02:08,559 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 07:02:08,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068494825] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:02:08,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 07:02:08,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2024-11-19 07:02:08,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442238090] [2024-11-19 07:02:08,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:02:08,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 07:02:08,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:08,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 07:02:08,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-19 07:02:08,563 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 07:02:08,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:08,584 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2024-11-19 07:02:08,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 07:02:08,584 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2024-11-19 07:02:08,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:08,585 INFO L225 Difference]: With dead ends: 148 [2024-11-19 07:02:08,585 INFO L226 Difference]: Without dead ends: 148 [2024-11-19 07:02:08,585 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-19 07:02:08,586 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 124 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 194 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 07:02:08,586 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 194 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 07:02:08,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-11-19 07:02:08,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 90. [2024-11-19 07:02:08,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 86 states have internal predecessors, (91), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 07:02:08,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2024-11-19 07:02:08,598 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 29 [2024-11-19 07:02:08,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:08,598 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2024-11-19 07:02:08,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 07:02:08,599 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2024-11-19 07:02:08,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-19 07:02:08,601 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:08,601 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:08,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 07:02:08,801 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 07:02:08,802 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:08,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:08,803 INFO L85 PathProgramCache]: Analyzing trace with hash 265662472, now seen corresponding path program 1 times [2024-11-19 07:02:08,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:08,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105760380] [2024-11-19 07:02:08,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:08,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 07:02:09,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:09,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105760380] [2024-11-19 07:02:09,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105760380] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:09,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255331306] [2024-11-19 07:02:09,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:09,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:09,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:02:09,027 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 07:02:09,031 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 07:02:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:09,120 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-19 07:02:09,124 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:02:09,131 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 07:02:09,150 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 07:02:09,211 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-19 07:02:09,212 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 07:02:09,247 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 07:02:09,247 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 07:02:09,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 6 not checked. [2024-11-19 07:02:09,286 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:02:09,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255331306] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:09,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:02:09,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2024-11-19 07:02:09,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157377910] [2024-11-19 07:02:09,488 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:02:09,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 07:02:09,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:09,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 07:02:09,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=274, Unknown=1, NotChecked=34, Total=380 [2024-11-19 07:02:09,489 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-19 07:02:09,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:09,797 INFO L93 Difference]: Finished difference Result 127 states and 135 transitions. [2024-11-19 07:02:09,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 07:02:09,798 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2024-11-19 07:02:09,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:09,798 INFO L225 Difference]: With dead ends: 127 [2024-11-19 07:02:09,798 INFO L226 Difference]: Without dead ends: 127 [2024-11-19 07:02:09,799 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=367, Unknown=1, NotChecked=40, Total=506 [2024-11-19 07:02:09,799 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 121 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:09,799 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 407 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 454 Invalid, 0 Unknown, 128 Unchecked, 0.3s Time] [2024-11-19 07:02:09,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-19 07:02:09,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 87. [2024-11-19 07:02:09,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 83 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 07:02:09,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2024-11-19 07:02:09,802 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 29 [2024-11-19 07:02:09,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:09,803 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2024-11-19 07:02:09,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-19 07:02:09,803 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2024-11-19 07:02:09,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-19 07:02:09,803 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:09,803 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:09,820 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 07:02:10,007 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 07:02:10,008 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:10,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:10,008 INFO L85 PathProgramCache]: Analyzing trace with hash 265662473, now seen corresponding path program 1 times [2024-11-19 07:02:10,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:10,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418110205] [2024-11-19 07:02:10,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:10,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:02:10,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:10,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418110205] [2024-11-19 07:02:10,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418110205] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:10,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857240637] [2024-11-19 07:02:10,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:10,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:10,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:02:10,259 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 07:02:10,261 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 07:02:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:10,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-19 07:02:10,357 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:02:10,364 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 07:02:10,387 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 07:02:10,393 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|) (= (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 07:02:10,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:02:10,426 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 07:02:10,445 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 07:02:10,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:02:10,502 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 07:02:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 07:02:10,571 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:02:10,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857240637] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:10,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:02:10,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2024-11-19 07:02:10,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191667177] [2024-11-19 07:02:10,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:02:10,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-19 07:02:10,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:10,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-19 07:02:10,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=246, Unknown=1, NotChecked=32, Total=342 [2024-11-19 07:02:10,701 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand has 16 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-19 07:02:10,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:10,961 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2024-11-19 07:02:10,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 07:02:10,962 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (4), 2 states have call predecessors, (4), 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 07:02:10,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:10,962 INFO L225 Difference]: With dead ends: 79 [2024-11-19 07:02:10,962 INFO L226 Difference]: Without dead ends: 79 [2024-11-19 07:02:10,962 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=336, Unknown=1, NotChecked=38, Total=462 [2024-11-19 07:02:10,963 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 209 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:10,963 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 278 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 305 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2024-11-19 07:02:10,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-19 07:02:10,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2024-11-19 07:02:10,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 54 states have (on average 1.4814814814814814) internal successors, (80), 75 states have internal predecessors, (80), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 07:02:10,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2024-11-19 07:02:10,966 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 29 [2024-11-19 07:02:10,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:10,966 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2024-11-19 07:02:10,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-19 07:02:10,966 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2024-11-19 07:02:10,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-19 07:02:10,967 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:10,967 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:10,979 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 07:02:11,170 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 07:02:11,171 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:11,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:11,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1898565453, now seen corresponding path program 1 times [2024-11-19 07:02:11,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:11,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933935597] [2024-11-19 07:02:11,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:11,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:11,301 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 07:02:11,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:11,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933935597] [2024-11-19 07:02:11,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933935597] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:02:11,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:02:11,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-19 07:02:11,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104729796] [2024-11-19 07:02:11,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:02:11,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 07:02:11,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:11,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 07:02:11,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-11-19 07:02:11,303 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 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 07:02:11,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:11,562 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2024-11-19 07:02:11,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 07:02:11,562 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 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 31 [2024-11-19 07:02:11,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:11,564 INFO L225 Difference]: With dead ends: 112 [2024-11-19 07:02:11,564 INFO L226 Difference]: Without dead ends: 112 [2024-11-19 07:02:11,564 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-19 07:02:11,565 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 116 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:11,565 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 325 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 07:02:11,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-19 07:02:11,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 79. [2024-11-19 07:02:11,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 75 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 07:02:11,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2024-11-19 07:02:11,567 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 31 [2024-11-19 07:02:11,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:11,568 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2024-11-19 07:02:11,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 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 07:02:11,568 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2024-11-19 07:02:11,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-19 07:02:11,568 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:11,568 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:11,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-19 07:02:11,568 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:11,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:11,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1898565454, now seen corresponding path program 1 times [2024-11-19 07:02:11,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:11,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145913138] [2024-11-19 07:02:11,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:11,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:11,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:11,795 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 07:02:11,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:11,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145913138] [2024-11-19 07:02:11,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145913138] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:02:11,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:02:11,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-19 07:02:11,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928610370] [2024-11-19 07:02:11,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:02:11,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 07:02:11,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:11,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 07:02:11,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-11-19 07:02:11,797 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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 07:02:12,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:12,079 INFO L93 Difference]: Finished difference Result 144 states and 159 transitions. [2024-11-19 07:02:12,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 07:02:12,079 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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 31 [2024-11-19 07:02:12,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:12,080 INFO L225 Difference]: With dead ends: 144 [2024-11-19 07:02:12,080 INFO L226 Difference]: Without dead ends: 144 [2024-11-19 07:02:12,081 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-19 07:02:12,081 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 144 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:12,081 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 451 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 07:02:12,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-19 07:02:12,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 116. [2024-11-19 07:02:12,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 93 states have (on average 1.5268817204301075) internal successors, (142), 112 states have internal predecessors, (142), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 07:02:12,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 146 transitions. [2024-11-19 07:02:12,084 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 146 transitions. Word has length 31 [2024-11-19 07:02:12,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:12,084 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 146 transitions. [2024-11-19 07:02:12,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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 07:02:12,084 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 146 transitions. [2024-11-19 07:02:12,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-19 07:02:12,085 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:12,085 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:12,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-19 07:02:12,085 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:12,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:12,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1609686440, now seen corresponding path program 1 times [2024-11-19 07:02:12,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:12,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312915750] [2024-11-19 07:02:12,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:12,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:12,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:02:12,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:12,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312915750] [2024-11-19 07:02:12,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312915750] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:12,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551180254] [2024-11-19 07:02:12,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:12,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:12,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:02:12,471 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 07:02:12,472 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 07:02:12,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:12,678 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-19 07:02:12,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:02:12,717 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 07:02:12,941 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 07:02:12,941 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 07:02:13,026 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 07:02:13,120 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-19 07:02:13,121 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 34 treesize of output 33 [2024-11-19 07:02:13,277 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 37 treesize of output 21 [2024-11-19 07:02:13,358 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 25 treesize of output 13 [2024-11-19 07:02:13,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:02:13,363 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:02:13,384 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 26 treesize of output 18 [2024-11-19 07:02:13,385 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 22 treesize of output 14 [2024-11-19 07:02:13,399 INFO L349 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2024-11-19 07:02:13,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2024-11-19 07:02:13,448 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_680 (Array Int Int))) (= |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_680) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|))) is different from false [2024-11-19 07:02:13,453 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 07:02:13,453 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2024-11-19 07:02:13,456 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 30 treesize of output 22 [2024-11-19 07:02:13,459 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 07:02:13,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551180254] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:13,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:02:13,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 37 [2024-11-19 07:02:13,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127332761] [2024-11-19 07:02:13,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:02:13,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-19 07:02:13,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:13,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-19 07:02:13,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1440, Unknown=16, NotChecked=76, Total=1640 [2024-11-19 07:02:13,520 INFO L87 Difference]: Start difference. First operand 116 states and 146 transitions. Second operand has 38 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 33 states have internal predecessors, (61), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-19 07:02:14,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:14,294 INFO L93 Difference]: Finished difference Result 179 states and 219 transitions. [2024-11-19 07:02:14,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-19 07:02:14,294 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 33 states have internal predecessors, (61), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2024-11-19 07:02:14,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:14,295 INFO L225 Difference]: With dead ends: 179 [2024-11-19 07:02:14,295 INFO L226 Difference]: Without dead ends: 179 [2024-11-19 07:02:14,296 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=184, Invalid=2155, Unknown=17, NotChecked=94, Total=2450 [2024-11-19 07:02:14,296 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 322 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:14,296 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 798 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1326 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-19 07:02:14,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-11-19 07:02:14,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 133. [2024-11-19 07:02:14,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 109 states have (on average 1.4770642201834863) internal successors, (161), 128 states have internal predecessors, (161), 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 07:02:14,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 167 transitions. [2024-11-19 07:02:14,299 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 167 transitions. Word has length 36 [2024-11-19 07:02:14,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:14,300 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 167 transitions. [2024-11-19 07:02:14,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 33 states have internal predecessors, (61), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-19 07:02:14,300 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 167 transitions. [2024-11-19 07:02:14,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-19 07:02:14,300 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:14,300 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:14,313 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 07:02:14,501 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 07:02:14,501 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:14,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:14,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1609686439, now seen corresponding path program 1 times [2024-11-19 07:02:14,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:14,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828046135] [2024-11-19 07:02:14,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:14,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:02:15,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:15,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828046135] [2024-11-19 07:02:15,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828046135] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:15,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984580571] [2024-11-19 07:02:15,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:15,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:15,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:02:15,219 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 07:02:15,221 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 07:02:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:15,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-19 07:02:15,345 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:02:15,367 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 07:02:15,585 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 07:02:15,585 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 07:02:15,666 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 07:02:15,671 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 07:02:15,792 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-19 07:02:15,793 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 50 treesize of output 45 [2024-11-19 07:02:15,796 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 07:02:15,979 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 48 treesize of output 28 [2024-11-19 07:02:16,137 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 25 treesize of output 13 [2024-11-19 07:02:16,140 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 7 treesize of output 3 [2024-11-19 07:02:16,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:02:16,206 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:02:16,516 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 56 treesize of output 40 [2024-11-19 07:02:16,518 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 51 treesize of output 31 [2024-11-19 07:02:16,629 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 07:02:16,630 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 40 treesize of output 44 [2024-11-19 07:02:16,801 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 07:02:16,802 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2024-11-19 07:02:16,806 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 30 treesize of output 22 [2024-11-19 07:02:16,812 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 07:02:16,816 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 07:02:16,816 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2024-11-19 07:02:16,817 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 07:02:16,819 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 18 treesize of output 10 [2024-11-19 07:02:16,825 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 07:02:16,826 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2024-11-19 07:02:16,828 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 07:02:16,831 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 18 treesize of output 10 [2024-11-19 07:02:17,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984580571] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:17,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:02:17,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 42 [2024-11-19 07:02:17,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544993403] [2024-11-19 07:02:17,031 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:02:17,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-19 07:02:17,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:17,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-19 07:02:17,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=3036, Unknown=1, NotChecked=0, Total=3192 [2024-11-19 07:02:17,032 INFO L87 Difference]: Start difference. First operand 133 states and 167 transitions. Second operand has 43 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 37 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-19 07:02:18,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:18,881 INFO L93 Difference]: Finished difference Result 202 states and 244 transitions. [2024-11-19 07:02:18,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-19 07:02:18,881 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 37 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2024-11-19 07:02:18,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:18,882 INFO L225 Difference]: With dead ends: 202 [2024-11-19 07:02:18,882 INFO L226 Difference]: Without dead ends: 202 [2024-11-19 07:02:18,883 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=312, Invalid=5089, Unknown=1, NotChecked=0, Total=5402 [2024-11-19 07:02:18,884 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 569 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 2189 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1324 SdHoareTripleChecker+Invalid, 2198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:18,884 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 1324 Invalid, 2198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2189 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-19 07:02:18,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-19 07:02:18,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 132. [2024-11-19 07:02:18,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 108 states have (on average 1.4722222222222223) internal successors, (159), 127 states have internal predecessors, (159), 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 07:02:18,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 165 transitions. [2024-11-19 07:02:18,887 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 165 transitions. Word has length 36 [2024-11-19 07:02:18,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:18,887 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 165 transitions. [2024-11-19 07:02:18,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 37 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-19 07:02:18,887 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 165 transitions. [2024-11-19 07:02:18,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-19 07:02:18,888 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:18,888 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:18,901 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 07:02:19,092 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 07:02:19,093 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:19,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:19,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1637698841, now seen corresponding path program 1 times [2024-11-19 07:02:19,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:19,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963319342] [2024-11-19 07:02:19,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:19,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:19,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:19,208 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 07:02:19,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:19,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963319342] [2024-11-19 07:02:19,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963319342] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:02:19,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:02:19,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-19 07:02:19,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252720376] [2024-11-19 07:02:19,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:02:19,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 07:02:19,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:19,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 07:02:19,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-19 07:02:19,210 INFO L87 Difference]: Start difference. First operand 132 states and 165 transitions. Second operand has 11 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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 07:02:19,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:19,330 INFO L93 Difference]: Finished difference Result 131 states and 164 transitions. [2024-11-19 07:02:19,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 07:02:19,330 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), 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 37 [2024-11-19 07:02:19,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:19,331 INFO L225 Difference]: With dead ends: 131 [2024-11-19 07:02:19,331 INFO L226 Difference]: Without dead ends: 131 [2024-11-19 07:02:19,331 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-19 07:02:19,333 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 79 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:19,333 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 486 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 07:02:19,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-11-19 07:02:19,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2024-11-19 07:02:19,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 108 states have (on average 1.462962962962963) internal successors, (158), 126 states have internal predecessors, (158), 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 07:02:19,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 164 transitions. [2024-11-19 07:02:19,337 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 164 transitions. Word has length 37 [2024-11-19 07:02:19,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:19,337 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 164 transitions. [2024-11-19 07:02:19,337 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), 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 07:02:19,337 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 164 transitions. [2024-11-19 07:02:19,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-19 07:02:19,338 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:19,338 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:19,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-19 07:02:19,339 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:19,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:19,339 INFO L85 PathProgramCache]: Analyzing trace with hash -770512427, now seen corresponding path program 1 times [2024-11-19 07:02:19,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:19,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015984506] [2024-11-19 07:02:19,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:19,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 07:02:19,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:19,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015984506] [2024-11-19 07:02:19,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015984506] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:02:19,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:02:19,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 07:02:19,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317183165] [2024-11-19 07:02:19,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:02:19,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 07:02:19,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:19,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 07:02:19,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 07:02:19,410 INFO L87 Difference]: Start difference. First operand 131 states and 164 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 07:02:19,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:19,464 INFO L93 Difference]: Finished difference Result 143 states and 181 transitions. [2024-11-19 07:02:19,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 07:02:19,464 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2024-11-19 07:02:19,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:19,465 INFO L225 Difference]: With dead ends: 143 [2024-11-19 07:02:19,465 INFO L226 Difference]: Without dead ends: 143 [2024-11-19 07:02:19,466 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 07:02:19,466 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 2 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:19,466 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 238 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 07:02:19,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-19 07:02:19,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2024-11-19 07:02:19,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 116 states have (on average 1.4655172413793103) internal successors, (170), 134 states have internal predecessors, (170), 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 07:02:19,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 176 transitions. [2024-11-19 07:02:19,470 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 176 transitions. Word has length 38 [2024-11-19 07:02:19,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:19,471 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 176 transitions. [2024-11-19 07:02:19,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 07:02:19,471 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 176 transitions. [2024-11-19 07:02:19,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-19 07:02:19,472 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:19,472 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:19,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-19 07:02:19,472 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:19,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:19,472 INFO L85 PathProgramCache]: Analyzing trace with hash -770943376, now seen corresponding path program 1 times [2024-11-19 07:02:19,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:19,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895792782] [2024-11-19 07:02:19,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:19,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:19,617 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 07:02:19,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:19,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895792782] [2024-11-19 07:02:19,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895792782] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:02:19,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:02:19,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-19 07:02:19,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680800814] [2024-11-19 07:02:19,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:02:19,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 07:02:19,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:19,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 07:02:19,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-19 07:02:19,620 INFO L87 Difference]: Start difference. First operand 139 states and 176 transitions. Second operand has 11 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 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 07:02:19,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:19,819 INFO L93 Difference]: Finished difference Result 162 states and 187 transitions. [2024-11-19 07:02:19,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 07:02:19,820 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 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 38 [2024-11-19 07:02:19,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:19,820 INFO L225 Difference]: With dead ends: 162 [2024-11-19 07:02:19,821 INFO L226 Difference]: Without dead ends: 162 [2024-11-19 07:02:19,821 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-19 07:02:19,821 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 78 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:19,821 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 503 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 07:02:19,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-11-19 07:02:19,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 144. [2024-11-19 07:02:19,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 121 states have (on average 1.4462809917355373) internal successors, (175), 139 states have internal predecessors, (175), 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 07:02:19,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 181 transitions. [2024-11-19 07:02:19,827 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 181 transitions. Word has length 38 [2024-11-19 07:02:19,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:19,827 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 181 transitions. [2024-11-19 07:02:19,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 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 07:02:19,827 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 181 transitions. [2024-11-19 07:02:19,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-19 07:02:19,828 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:19,828 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:19,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-19 07:02:19,828 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:19,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:19,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1870559227, now seen corresponding path program 1 times [2024-11-19 07:02:19,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:19,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610205300] [2024-11-19 07:02:19,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:19,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 07:02:19,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:19,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610205300] [2024-11-19 07:02:19,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610205300] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:02:19,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:02:19,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 07:02:19,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55933003] [2024-11-19 07:02:19,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:02:19,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 07:02:19,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:19,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 07:02:19,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-19 07:02:19,906 INFO L87 Difference]: Start difference. First operand 144 states and 181 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 07:02:20,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:20,013 INFO L93 Difference]: Finished difference Result 147 states and 183 transitions. [2024-11-19 07:02:20,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 07:02:20,013 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2024-11-19 07:02:20,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:20,014 INFO L225 Difference]: With dead ends: 147 [2024-11-19 07:02:20,014 INFO L226 Difference]: Without dead ends: 147 [2024-11-19 07:02:20,014 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-19 07:02:20,015 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 33 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:20,015 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 241 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 07:02:20,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-19 07:02:20,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2024-11-19 07:02:20,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 121 states have (on average 1.43801652892562) internal successors, (174), 138 states have internal predecessors, (174), 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 07:02:20,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 180 transitions. [2024-11-19 07:02:20,021 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 180 transitions. Word has length 39 [2024-11-19 07:02:20,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:20,021 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 180 transitions. [2024-11-19 07:02:20,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 07:02:20,021 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 180 transitions. [2024-11-19 07:02:20,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-19 07:02:20,021 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:20,021 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:20,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-19 07:02:20,022 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:20,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:20,022 INFO L85 PathProgramCache]: Analyzing trace with hash -2142205997, now seen corresponding path program 1 times [2024-11-19 07:02:20,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:20,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389340249] [2024-11-19 07:02:20,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:20,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:20,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 07:02:20,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:20,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389340249] [2024-11-19 07:02:20,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389340249] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:20,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689693061] [2024-11-19 07:02:20,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:20,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:20,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:02:20,224 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 07:02:20,227 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 07:02:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:20,352 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 07:02:20,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:02:20,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:02:20,438 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 07:02:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 07:02:20,441 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 07:02:20,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689693061] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:02:20,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 07:02:20,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 16 [2024-11-19 07:02:20,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262133758] [2024-11-19 07:02:20,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:02:20,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 07:02:20,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:20,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 07:02:20,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2024-11-19 07:02:20,443 INFO L87 Difference]: Start difference. First operand 143 states and 180 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 07:02:20,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:20,528 INFO L93 Difference]: Finished difference Result 142 states and 179 transitions. [2024-11-19 07:02:20,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 07:02:20,528 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2024-11-19 07:02:20,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:20,529 INFO L225 Difference]: With dead ends: 142 [2024-11-19 07:02:20,530 INFO L226 Difference]: Without dead ends: 142 [2024-11-19 07:02:20,530 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2024-11-19 07:02:20,530 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 100 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:20,531 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 117 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 07:02:20,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-19 07:02:20,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2024-11-19 07:02:20,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 121 states have (on average 1.4297520661157024) internal successors, (173), 137 states have internal predecessors, (173), 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 07:02:20,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 179 transitions. [2024-11-19 07:02:20,535 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 179 transitions. Word has length 40 [2024-11-19 07:02:20,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:20,535 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 179 transitions. [2024-11-19 07:02:20,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 07:02:20,536 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 179 transitions. [2024-11-19 07:02:20,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-19 07:02:20,536 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:20,536 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:20,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-19 07:02:20,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:20,741 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:20,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:20,741 INFO L85 PathProgramCache]: Analyzing trace with hash -726991315, now seen corresponding path program 2 times [2024-11-19 07:02:20,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:20,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212364321] [2024-11-19 07:02:20,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 07:02:20,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:20,762 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 07:02:20,762 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 07:02:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:02:21,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:21,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212364321] [2024-11-19 07:02:21,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212364321] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:21,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800238057] [2024-11-19 07:02:21,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 07:02:21,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:21,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:02:21,285 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 07:02:21,287 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 07:02:21,424 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 07:02:21,424 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 07:02:21,426 INFO L255 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 102 conjuncts are in the unsatisfiable core [2024-11-19 07:02:21,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:02:21,451 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 07:02:21,637 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 07:02:21,637 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 07:02:21,738 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 07:02:21,744 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 07:02:21,838 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-19 07:02:21,838 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 47 treesize of output 33 [2024-11-19 07:02:21,844 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 27 treesize of output 22 [2024-11-19 07:02:22,327 INFO L349 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2024-11-19 07:02:22,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 35 [2024-11-19 07:02:22,395 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 34 treesize of output 18 [2024-11-19 07:02:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:02:22,449 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:02:22,808 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 80 treesize of output 56 [2024-11-19 07:02:22,811 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 60 treesize of output 36 [2024-11-19 07:02:23,016 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 07:02:23,016 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 840 treesize of output 720 [2024-11-19 07:02:23,122 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-19 07:02:23,123 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 840 treesize of output 1 [2024-11-19 07:02:23,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800238057] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:23,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:02:23,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 44 [2024-11-19 07:02:23,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190424559] [2024-11-19 07:02:23,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:02:23,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-19 07:02:23,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:23,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-19 07:02:23,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=3225, Unknown=0, NotChecked=0, Total=3422 [2024-11-19 07:02:23,333 INFO L87 Difference]: Start difference. First operand 142 states and 179 transitions. Second operand has 44 states, 43 states have (on average 1.697674418604651) internal successors, (73), 39 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-19 07:02:24,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:24,669 INFO L93 Difference]: Finished difference Result 162 states and 195 transitions. [2024-11-19 07:02:24,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-19 07:02:24,669 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.697674418604651) internal successors, (73), 39 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2024-11-19 07:02:24,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:24,670 INFO L225 Difference]: With dead ends: 162 [2024-11-19 07:02:24,670 INFO L226 Difference]: Without dead ends: 162 [2024-11-19 07:02:24,672 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=367, Invalid=4745, Unknown=0, NotChecked=0, Total=5112 [2024-11-19 07:02:24,672 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 284 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:24,672 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 913 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1477 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-19 07:02:24,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-11-19 07:02:24,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 142. [2024-11-19 07:02:24,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 121 states have (on average 1.421487603305785) internal successors, (172), 137 states have internal predecessors, (172), 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 07:02:24,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 178 transitions. [2024-11-19 07:02:24,679 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 178 transitions. Word has length 41 [2024-11-19 07:02:24,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:24,679 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 178 transitions. [2024-11-19 07:02:24,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.697674418604651) internal successors, (73), 39 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-19 07:02:24,679 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 178 transitions. [2024-11-19 07:02:24,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-19 07:02:24,679 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:24,679 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:24,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-19 07:02:24,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:24,880 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:24,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:24,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1390945386, now seen corresponding path program 1 times [2024-11-19 07:02:24,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:24,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632959250] [2024-11-19 07:02:24,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:24,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:24,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 07:02:24,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:24,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632959250] [2024-11-19 07:02:24,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632959250] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:24,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283854425] [2024-11-19 07:02:24,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:24,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:24,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:02:24,963 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 07:02:24,974 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 07:02:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:25,191 INFO L255 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-19 07:02:25,195 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:02:25,298 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 07:02:25,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 07:02:25,303 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 07:02:25,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283854425] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:02:25,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 07:02:25,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 13 [2024-11-19 07:02:25,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104954713] [2024-11-19 07:02:25,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:02:25,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 07:02:25,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:25,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 07:02:25,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2024-11-19 07:02:25,304 INFO L87 Difference]: Start difference. First operand 142 states and 178 transitions. Second operand has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 07:02:25,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:25,489 INFO L93 Difference]: Finished difference Result 176 states and 216 transitions. [2024-11-19 07:02:25,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 07:02:25,489 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2024-11-19 07:02:25,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:25,490 INFO L225 Difference]: With dead ends: 176 [2024-11-19 07:02:25,490 INFO L226 Difference]: Without dead ends: 176 [2024-11-19 07:02:25,490 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2024-11-19 07:02:25,491 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 119 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:25,492 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 345 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 07:02:25,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-11-19 07:02:25,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 155. [2024-11-19 07:02:25,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 135 states have (on average 1.4148148148148147) internal successors, (191), 150 states have internal predecessors, (191), 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 07:02:25,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 197 transitions. [2024-11-19 07:02:25,494 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 197 transitions. Word has length 43 [2024-11-19 07:02:25,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:25,495 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 197 transitions. [2024-11-19 07:02:25,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 07:02:25,495 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 197 transitions. [2024-11-19 07:02:25,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-19 07:02:25,495 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:25,495 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:25,509 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 07:02:25,696 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,SelfDestructingSolverStorable20 [2024-11-19 07:02:25,697 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:25,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:25,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1390945387, now seen corresponding path program 1 times [2024-11-19 07:02:25,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:25,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82002823] [2024-11-19 07:02:25,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:25,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 07:02:25,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:25,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82002823] [2024-11-19 07:02:25,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82002823] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:25,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558841698] [2024-11-19 07:02:25,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:25,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:25,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:02:25,997 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 07:02:25,998 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 07:02:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:26,152 INFO L255 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-19 07:02:26,154 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:02:26,171 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 07:02:26,475 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 07:02:26,518 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 07:02:26,518 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:02:26,734 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 16 [2024-11-19 07:02:26,736 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 26 treesize of output 14 [2024-11-19 07:02:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 07:02:26,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558841698] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:26,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:02:26,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [13, 15] total 40 [2024-11-19 07:02:26,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490288605] [2024-11-19 07:02:26,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:02:26,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 07:02:26,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:26,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 07:02:26,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1505, Unknown=0, NotChecked=0, Total=1640 [2024-11-19 07:02:26,948 INFO L87 Difference]: Start difference. First operand 155 states and 197 transitions. Second operand has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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 07:02:27,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:27,434 INFO L93 Difference]: Finished difference Result 168 states and 196 transitions. [2024-11-19 07:02:27,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-19 07:02:27,434 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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 43 [2024-11-19 07:02:27,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:27,435 INFO L225 Difference]: With dead ends: 168 [2024-11-19 07:02:27,435 INFO L226 Difference]: Without dead ends: 168 [2024-11-19 07:02:27,436 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=190, Invalid=2066, Unknown=0, NotChecked=0, Total=2256 [2024-11-19 07:02:27,439 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 134 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:27,440 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 538 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 07:02:27,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-19 07:02:27,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 154. [2024-11-19 07:02:27,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 136 states have (on average 1.3676470588235294) internal successors, (186), 149 states have internal predecessors, (186), 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 07:02:27,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 192 transitions. [2024-11-19 07:02:27,443 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 192 transitions. Word has length 43 [2024-11-19 07:02:27,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:27,443 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 192 transitions. [2024-11-19 07:02:27,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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 07:02:27,444 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 192 transitions. [2024-11-19 07:02:27,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-19 07:02:27,444 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:27,444 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:27,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-19 07:02:27,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-19 07:02:27,649 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:27,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:27,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1383901681, now seen corresponding path program 1 times [2024-11-19 07:02:27,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:27,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767013809] [2024-11-19 07:02:27,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:27,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 07:02:27,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:27,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767013809] [2024-11-19 07:02:27,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767013809] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:02:27,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:02:27,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 07:02:27,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089700542] [2024-11-19 07:02:27,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:02:27,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 07:02:27,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:27,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 07:02:27,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 07:02:27,708 INFO L87 Difference]: Start difference. First operand 154 states and 192 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 07:02:27,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:27,814 INFO L93 Difference]: Finished difference Result 152 states and 189 transitions. [2024-11-19 07:02:27,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 07:02:27,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2024-11-19 07:02:27,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:27,815 INFO L225 Difference]: With dead ends: 152 [2024-11-19 07:02:27,815 INFO L226 Difference]: Without dead ends: 152 [2024-11-19 07:02:27,815 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-19 07:02:27,816 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 61 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:27,816 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 88 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 07:02:27,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-19 07:02:27,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2024-11-19 07:02:27,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 136 states have (on average 1.3455882352941178) internal successors, (183), 147 states have internal predecessors, (183), 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 07:02:27,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 189 transitions. [2024-11-19 07:02:27,821 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 189 transitions. Word has length 44 [2024-11-19 07:02:27,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:27,821 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 189 transitions. [2024-11-19 07:02:27,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 07:02:27,822 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 189 transitions. [2024-11-19 07:02:27,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-19 07:02:27,822 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:27,822 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:27,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-19 07:02:27,822 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:27,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:27,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1510343011, now seen corresponding path program 1 times [2024-11-19 07:02:27,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:27,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225219360] [2024-11-19 07:02:27,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:27,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 07:02:27,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:27,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225219360] [2024-11-19 07:02:27,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225219360] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:27,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353780016] [2024-11-19 07:02:27,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:27,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:27,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:02:27,917 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 07:02:27,921 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 07:02:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:28,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-19 07:02:28,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:02:28,152 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 07:02:28,153 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:02:28,222 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 07:02:28,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353780016] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 07:02:28,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 07:02:28,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-11-19 07:02:28,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969231730] [2024-11-19 07:02:28,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 07:02:28,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 07:02:28,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:28,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 07:02:28,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-11-19 07:02:28,223 INFO L87 Difference]: Start difference. First operand 152 states and 189 transitions. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-19 07:02:28,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:28,267 INFO L93 Difference]: Finished difference Result 260 states and 316 transitions. [2024-11-19 07:02:28,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 07:02:28,268 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2024-11-19 07:02:28,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:28,269 INFO L225 Difference]: With dead ends: 260 [2024-11-19 07:02:28,269 INFO L226 Difference]: Without dead ends: 260 [2024-11-19 07:02:28,269 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-11-19 07:02:28,269 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 302 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:28,269 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 292 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 07:02:28,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-11-19 07:02:28,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 175. [2024-11-19 07:02:28,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 159 states have (on average 1.3396226415094339) internal successors, (213), 170 states have internal predecessors, (213), 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 07:02:28,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 219 transitions. [2024-11-19 07:02:28,275 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 219 transitions. Word has length 46 [2024-11-19 07:02:28,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:28,275 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 219 transitions. [2024-11-19 07:02:28,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-19 07:02:28,275 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 219 transitions. [2024-11-19 07:02:28,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-19 07:02:28,276 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:28,276 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:28,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-19 07:02:28,476 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,SelfDestructingSolverStorable23 [2024-11-19 07:02:28,476 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:28,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:28,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1510371941, now seen corresponding path program 1 times [2024-11-19 07:02:28,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:28,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282979952] [2024-11-19 07:02:28,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:28,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:02:29,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:29,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282979952] [2024-11-19 07:02:29,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282979952] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:29,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504070809] [2024-11-19 07:02:29,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:29,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:29,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:02:29,444 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 07:02:29,445 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 07:02:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:29,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-19 07:02:29,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:02:29,593 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 07:02:29,805 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 07:02:29,805 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 07:02:29,906 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 07:02:30,017 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-19 07:02:30,017 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 25 treesize of output 26 [2024-11-19 07:02:30,389 INFO L349 Elim1Store]: treesize reduction 12, result has 50.0 percent of original size [2024-11-19 07:02:30,389 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 32 treesize of output 24 [2024-11-19 07:02:30,624 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 16 treesize of output 8 [2024-11-19 07:02:30,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:02:30,669 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:02:30,890 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 8 treesize of output 4 [2024-11-19 07:02:30,927 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 25 treesize of output 13 [2024-11-19 07:02:30,932 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1542 (Array Int Int))) (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1542) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) 0)))) is different from false [2024-11-19 07:02:30,999 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 07:02:30,999 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2024-11-19 07:02:31,005 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 07:02:31,005 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 33 treesize of output 33 [2024-11-19 07:02:31,007 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 20 treesize of output 18 [2024-11-19 07:02:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2024-11-19 07:02:31,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504070809] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 07:02:31,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 07:02:31,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23, 23] total 68 [2024-11-19 07:02:31,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282836240] [2024-11-19 07:02:31,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 07:02:31,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-19 07:02:31,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:31,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-19 07:02:31,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=4211, Unknown=22, NotChecked=130, Total=4556 [2024-11-19 07:02:31,772 INFO L87 Difference]: Start difference. First operand 175 states and 219 transitions. Second operand has 68 states, 68 states have (on average 1.6470588235294117) internal successors, (112), 60 states have internal predecessors, (112), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-19 07:02:33,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:33,833 INFO L93 Difference]: Finished difference Result 194 states and 236 transitions. [2024-11-19 07:02:33,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-19 07:02:33,834 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.6470588235294117) internal successors, (112), 60 states have internal predecessors, (112), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 46 [2024-11-19 07:02:33,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:33,835 INFO L225 Difference]: With dead ends: 194 [2024-11-19 07:02:33,835 INFO L226 Difference]: Without dead ends: 190 [2024-11-19 07:02:33,836 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=458, Invalid=7355, Unknown=23, NotChecked=174, Total=8010 [2024-11-19 07:02:33,836 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 322 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 2526 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 2673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:33,836 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 1135 Invalid, 2673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2526 Invalid, 0 Unknown, 118 Unchecked, 1.2s Time] [2024-11-19 07:02:33,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-11-19 07:02:33,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 175. [2024-11-19 07:02:33,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 159 states have (on average 1.3333333333333333) internal successors, (212), 170 states have internal predecessors, (212), 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 07:02:33,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 218 transitions. [2024-11-19 07:02:33,840 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 218 transitions. Word has length 46 [2024-11-19 07:02:33,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:33,840 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 218 transitions. [2024-11-19 07:02:33,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.6470588235294117) internal successors, (112), 60 states have internal predecessors, (112), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-19 07:02:33,840 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 218 transitions. [2024-11-19 07:02:33,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-19 07:02:33,840 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:33,841 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:33,855 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 07:02:34,044 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,SelfDestructingSolverStorable24 [2024-11-19 07:02:34,044 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:34,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:34,045 INFO L85 PathProgramCache]: Analyzing trace with hash -190411592, now seen corresponding path program 1 times [2024-11-19 07:02:34,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:34,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716787247] [2024-11-19 07:02:34,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:34,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:34,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:34,631 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:02:34,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:34,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716787247] [2024-11-19 07:02:34,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716787247] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:34,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999797059] [2024-11-19 07:02:34,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:34,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:34,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:02:34,633 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 07:02:34,634 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 07:02:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:34,803 INFO L255 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-19 07:02:34,805 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:02:34,824 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 07:02:34,897 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 07:02:34,910 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 07:02:34,910 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 07:02:34,969 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 07:02:35,045 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-19 07:02:35,045 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 34 treesize of output 33 [2024-11-19 07:02:35,297 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 45 treesize of output 29 [2024-11-19 07:02:35,299 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 33 treesize of output 21 [2024-11-19 07:02:35,385 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 25 treesize of output 13 [2024-11-19 07:02:35,451 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 07:02:35,451 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:02:35,741 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 16 [2024-11-19 07:02:35,743 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 20 treesize of output 12 [2024-11-19 07:02:35,879 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 07:02:35,879 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2024-11-19 07:02:35,881 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 30 treesize of output 22 [2024-11-19 07:02:35,884 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 7 treesize of output 5 [2024-11-19 07:02:35,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999797059] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:35,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:02:35,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 38 [2024-11-19 07:02:35,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170334702] [2024-11-19 07:02:35,945 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:02:35,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-19 07:02:35,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:35,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-19 07:02:35,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1986, Unknown=42, NotChecked=0, Total=2162 [2024-11-19 07:02:35,949 INFO L87 Difference]: Start difference. First operand 175 states and 218 transitions. Second operand has 39 states, 37 states have (on average 1.972972972972973) internal successors, (73), 34 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-19 07:02:36,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:36,849 INFO L93 Difference]: Finished difference Result 192 states and 235 transitions. [2024-11-19 07:02:36,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-19 07:02:36,849 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.972972972972973) internal successors, (73), 34 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 46 [2024-11-19 07:02:36,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:36,851 INFO L225 Difference]: With dead ends: 192 [2024-11-19 07:02:36,855 INFO L226 Difference]: Without dead ends: 192 [2024-11-19 07:02:36,856 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=283, Invalid=3215, Unknown=42, NotChecked=0, Total=3540 [2024-11-19 07:02:36,856 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 217 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:36,857 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 731 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1404 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-19 07:02:36,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-19 07:02:36,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 176. [2024-11-19 07:02:36,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 160 states have (on average 1.33125) internal successors, (213), 171 states have internal predecessors, (213), 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 07:02:36,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 219 transitions. [2024-11-19 07:02:36,866 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 219 transitions. Word has length 46 [2024-11-19 07:02:36,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:36,866 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 219 transitions. [2024-11-19 07:02:36,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.972972972972973) internal successors, (73), 34 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-19 07:02:36,866 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 219 transitions. [2024-11-19 07:02:36,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-19 07:02:36,867 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:36,867 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:36,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-19 07:02:37,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:37,068 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:37,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:37,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1607740256, now seen corresponding path program 1 times [2024-11-19 07:02:37,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:37,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861525310] [2024-11-19 07:02:37,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:37,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:37,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:37,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 07:02:37,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:37,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861525310] [2024-11-19 07:02:37,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861525310] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:37,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345463296] [2024-11-19 07:02:37,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:37,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:37,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:02:37,524 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 07:02:37,527 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 07:02:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:37,717 INFO L255 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-19 07:02:37,719 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:02:38,068 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 30 treesize of output 18 [2024-11-19 07:02:38,118 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 15 treesize of output 7 [2024-11-19 07:02:38,121 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 15 treesize of output 7 [2024-11-19 07:02:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 07:02:38,141 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:02:38,263 INFO L349 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2024-11-19 07:02:38,264 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 19 treesize of output 19 [2024-11-19 07:02:38,269 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-19 07:02:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 07:02:38,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345463296] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 07:02:38,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 07:02:38,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18, 9] total 32 [2024-11-19 07:02:38,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183998268] [2024-11-19 07:02:38,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 07:02:38,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-19 07:02:38,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:38,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-19 07:02:38,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=910, Unknown=0, NotChecked=0, Total=992 [2024-11-19 07:02:38,290 INFO L87 Difference]: Start difference. First operand 176 states and 219 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-19 07:02:39,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:39,102 INFO L93 Difference]: Finished difference Result 220 states and 281 transitions. [2024-11-19 07:02:39,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-19 07:02:39,102 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2024-11-19 07:02:39,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:39,106 INFO L225 Difference]: With dead ends: 220 [2024-11-19 07:02:39,106 INFO L226 Difference]: Without dead ends: 220 [2024-11-19 07:02:39,107 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=246, Invalid=1916, Unknown=0, NotChecked=0, Total=2162 [2024-11-19 07:02:39,107 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 242 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:39,107 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 806 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-19 07:02:39,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-11-19 07:02:39,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 204. [2024-11-19 07:02:39,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 188 states have (on average 1.351063829787234) internal successors, (254), 199 states have internal predecessors, (254), 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 07:02:39,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 260 transitions. [2024-11-19 07:02:39,112 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 260 transitions. Word has length 47 [2024-11-19 07:02:39,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:39,112 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 260 transitions. [2024-11-19 07:02:39,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-19 07:02:39,112 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 260 transitions. [2024-11-19 07:02:39,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-19 07:02:39,113 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:39,113 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:39,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-19 07:02:39,313 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,SelfDestructingSolverStorable26 [2024-11-19 07:02:39,313 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:39,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:39,314 INFO L85 PathProgramCache]: Analyzing trace with hash -542535254, now seen corresponding path program 3 times [2024-11-19 07:02:39,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:39,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050399879] [2024-11-19 07:02:39,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 07:02:39,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:39,335 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 07:02:39,335 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 07:02:39,384 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-19 07:02:39,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:39,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050399879] [2024-11-19 07:02:39,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050399879] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:39,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613450837] [2024-11-19 07:02:39,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 07:02:39,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:39,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:02:39,387 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 07:02:39,388 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 07:02:39,566 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 07:02:39,567 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 07:02:39,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 07:02:39,569 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:02:39,588 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 07:02:39,588 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 07:02:39,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613450837] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:02:39,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 07:02:39,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-19 07:02:39,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048990854] [2024-11-19 07:02:39,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:02:39,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 07:02:39,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:39,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 07:02:39,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-19 07:02:39,590 INFO L87 Difference]: Start difference. First operand 204 states and 260 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 07:02:39,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:39,598 INFO L93 Difference]: Finished difference Result 161 states and 199 transitions. [2024-11-19 07:02:39,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 07:02:39,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 48 [2024-11-19 07:02:39,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:39,600 INFO L225 Difference]: With dead ends: 161 [2024-11-19 07:02:39,600 INFO L226 Difference]: Without dead ends: 161 [2024-11-19 07:02:39,600 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-19 07:02:39,600 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 132 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 07:02:39,601 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 132 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 07:02:39,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-19 07:02:39,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2024-11-19 07:02:39,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 146 states have (on average 1.3356164383561644) internal successors, (195), 157 states have internal predecessors, (195), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 07:02:39,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 199 transitions. [2024-11-19 07:02:39,605 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 199 transitions. Word has length 48 [2024-11-19 07:02:39,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:39,605 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 199 transitions. [2024-11-19 07:02:39,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 07:02:39,605 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 199 transitions. [2024-11-19 07:02:39,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-19 07:02:39,606 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:39,606 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:39,620 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 07:02:39,806 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,SelfDestructingSolverStorable27 [2024-11-19 07:02:39,807 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:39,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:39,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1698058331, now seen corresponding path program 1 times [2024-11-19 07:02:39,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:39,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101274965] [2024-11-19 07:02:39,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:39,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:39,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:39,916 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 07:02:39,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:39,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101274965] [2024-11-19 07:02:39,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101274965] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:39,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497679949] [2024-11-19 07:02:39,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:39,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:39,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:02:39,921 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 07:02:39,926 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 07:02:40,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:40,087 INFO L255 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 07:02:40,089 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:02:40,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:02:40,159 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 07:02:40,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-19 07:02:40,161 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 07:02:40,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497679949] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:02:40,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 07:02:40,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 8 [2024-11-19 07:02:40,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905413087] [2024-11-19 07:02:40,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:02:40,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 07:02:40,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:40,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 07:02:40,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-19 07:02:40,162 INFO L87 Difference]: Start difference. First operand 161 states and 199 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 07:02:40,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:40,238 INFO L93 Difference]: Finished difference Result 160 states and 196 transitions. [2024-11-19 07:02:40,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 07:02:40,238 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2024-11-19 07:02:40,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:40,239 INFO L225 Difference]: With dead ends: 160 [2024-11-19 07:02:40,239 INFO L226 Difference]: Without dead ends: 160 [2024-11-19 07:02:40,239 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-11-19 07:02:40,239 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 96 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:40,239 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 104 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 07:02:40,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-19 07:02:40,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2024-11-19 07:02:40,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 146 states have (on average 1.3150684931506849) internal successors, (192), 156 states have internal predecessors, (192), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 07:02:40,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 196 transitions. [2024-11-19 07:02:40,243 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 196 transitions. Word has length 48 [2024-11-19 07:02:40,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:40,244 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 196 transitions. [2024-11-19 07:02:40,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 07:02:40,244 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 196 transitions. [2024-11-19 07:02:40,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-19 07:02:40,258 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:40,258 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:40,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-19 07:02:40,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-19 07:02:40,459 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:40,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:40,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1100200794, now seen corresponding path program 1 times [2024-11-19 07:02:40,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:40,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611041932] [2024-11-19 07:02:40,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:40,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:02:41,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:41,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611041932] [2024-11-19 07:02:41,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611041932] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:41,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502543239] [2024-11-19 07:02:41,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:41,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:41,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:02:41,354 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 07:02:41,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-19 07:02:41,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:41,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-19 07:02:41,535 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:02:41,865 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 7 treesize of output 3 [2024-11-19 07:02:41,948 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 21 treesize of output 13 [2024-11-19 07:02:42,078 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 07:02:42,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 07:02:42,081 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 07:02:42,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502543239] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:02:42,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 07:02:42,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [27] total 42 [2024-11-19 07:02:42,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965253406] [2024-11-19 07:02:42,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:02:42,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 07:02:42,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:42,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 07:02:42,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1706, Unknown=0, NotChecked=0, Total=1806 [2024-11-19 07:02:42,084 INFO L87 Difference]: Start difference. First operand 160 states and 196 transitions. Second operand has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 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 07:02:42,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:42,672 INFO L93 Difference]: Finished difference Result 176 states and 218 transitions. [2024-11-19 07:02:42,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-19 07:02:42,672 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 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 49 [2024-11-19 07:02:42,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:42,673 INFO L225 Difference]: With dead ends: 176 [2024-11-19 07:02:42,673 INFO L226 Difference]: Without dead ends: 176 [2024-11-19 07:02:42,674 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=212, Invalid=2758, Unknown=0, NotChecked=0, Total=2970 [2024-11-19 07:02:42,674 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 138 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:42,674 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 413 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 07:02:42,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-11-19 07:02:42,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2024-11-19 07:02:42,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 159 states have (on average 1.3333333333333333) internal successors, (212), 169 states have internal predecessors, (212), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 07:02:42,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 216 transitions. [2024-11-19 07:02:42,677 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 216 transitions. Word has length 49 [2024-11-19 07:02:42,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:42,677 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 216 transitions. [2024-11-19 07:02:42,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 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 07:02:42,677 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 216 transitions. [2024-11-19 07:02:42,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-19 07:02:42,678 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:42,678 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:42,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-19 07:02:42,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:42,882 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:42,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:42,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1321820976, now seen corresponding path program 1 times [2024-11-19 07:02:42,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:42,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847320079] [2024-11-19 07:02:42,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:42,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 07:02:42,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:42,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847320079] [2024-11-19 07:02:42,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847320079] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:42,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088974137] [2024-11-19 07:02:42,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:42,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:42,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:02:43,002 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 07:02:43,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-19 07:02:43,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:43,170 INFO L255 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-19 07:02:43,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:02:43,193 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 33 treesize of output 25 [2024-11-19 07:02:43,195 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 29 treesize of output 21 [2024-11-19 07:02:43,212 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 25 treesize of output 17 [2024-11-19 07:02:43,214 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 21 treesize of output 13 [2024-11-19 07:02:43,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 07:02:43,217 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:02:43,265 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 28 treesize of output 20 [2024-11-19 07:02:43,267 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 28 treesize of output 20 [2024-11-19 07:02:43,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 07:02:43,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088974137] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 07:02:43,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 07:02:43,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-11-19 07:02:43,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382388172] [2024-11-19 07:02:43,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 07:02:43,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 07:02:43,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:43,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 07:02:43,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-19 07:02:43,277 INFO L87 Difference]: Start difference. First operand 173 states and 216 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 07:02:43,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:43,417 INFO L93 Difference]: Finished difference Result 165 states and 203 transitions. [2024-11-19 07:02:43,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 07:02:43,418 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2024-11-19 07:02:43,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:43,419 INFO L225 Difference]: With dead ends: 165 [2024-11-19 07:02:43,419 INFO L226 Difference]: Without dead ends: 165 [2024-11-19 07:02:43,419 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-19 07:02:43,419 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 12 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:43,420 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 296 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 07:02:43,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-11-19 07:02:43,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2024-11-19 07:02:43,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 151 states have (on average 1.3178807947019868) internal successors, (199), 161 states have internal predecessors, (199), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 07:02:43,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 203 transitions. [2024-11-19 07:02:43,422 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 203 transitions. Word has length 51 [2024-11-19 07:02:43,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:43,422 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 203 transitions. [2024-11-19 07:02:43,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 07:02:43,423 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 203 transitions. [2024-11-19 07:02:43,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-19 07:02:43,423 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:43,423 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:43,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-19 07:02:43,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:43,628 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:43,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:43,628 INFO L85 PathProgramCache]: Analyzing trace with hash 835287494, now seen corresponding path program 1 times [2024-11-19 07:02:43,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:43,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860444201] [2024-11-19 07:02:43,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:43,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-19 07:02:43,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:43,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860444201] [2024-11-19 07:02:43,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860444201] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:43,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679511589] [2024-11-19 07:02:43,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:43,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:43,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:02:43,790 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 07:02:43,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-19 07:02:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:44,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-19 07:02:44,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:02:44,018 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 07:02:44,253 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 7 treesize of output 3 [2024-11-19 07:02:44,380 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 07:02:44,443 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 07:02:44,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 07:02:44,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:02:44,788 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 39 treesize of output 27 [2024-11-19 07:02:44,794 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 31 treesize of output 23 [2024-11-19 07:02:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 07:02:44,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679511589] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 07:02:44,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 07:02:44,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 18, 17] total 34 [2024-11-19 07:02:44,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196281997] [2024-11-19 07:02:44,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 07:02:44,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-19 07:02:44,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:44,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-19 07:02:44,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2024-11-19 07:02:44,990 INFO L87 Difference]: Start difference. First operand 165 states and 203 transitions. Second operand has 35 states, 34 states have (on average 3.411764705882353) internal successors, (116), 33 states have internal predecessors, (116), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 07:02:46,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:46,135 INFO L93 Difference]: Finished difference Result 223 states and 254 transitions. [2024-11-19 07:02:46,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-19 07:02:46,135 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.411764705882353) internal successors, (116), 33 states have internal predecessors, (116), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2024-11-19 07:02:46,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:46,136 INFO L225 Difference]: With dead ends: 223 [2024-11-19 07:02:46,137 INFO L226 Difference]: Without dead ends: 223 [2024-11-19 07:02:46,138 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=517, Invalid=2905, Unknown=0, NotChecked=0, Total=3422 [2024-11-19 07:02:46,138 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 446 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:46,138 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 552 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1158 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-19 07:02:46,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-19 07:02:46,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 194. [2024-11-19 07:02:46,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 180 states have (on average 1.3222222222222222) internal successors, (238), 190 states have internal predecessors, (238), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 07:02:46,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 242 transitions. [2024-11-19 07:02:46,142 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 242 transitions. Word has length 56 [2024-11-19 07:02:46,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:46,143 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 242 transitions. [2024-11-19 07:02:46,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.411764705882353) internal successors, (116), 33 states have internal predecessors, (116), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 07:02:46,143 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 242 transitions. [2024-11-19 07:02:46,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-19 07:02:46,143 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:46,144 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:46,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-19 07:02:46,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-19 07:02:46,349 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2024-11-19 07:02:46,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:46,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1361255295, now seen corresponding path program 2 times [2024-11-19 07:02:46,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:46,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729580113] [2024-11-19 07:02:46,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 07:02:46,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:46,368 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 07:02:46,369 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 07:02:46,686 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-19 07:02:46,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:46,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729580113] [2024-11-19 07:02:46,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729580113] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:46,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509973774] [2024-11-19 07:02:46,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 07:02:46,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:46,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:02:46,688 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 07:02:46,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-19 07:02:46,892 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 07:02:46,892 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 07:02:46,899 INFO L255 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 136 conjuncts are in the unsatisfiable core [2024-11-19 07:02:46,902 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:02:46,915 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 07:02:47,062 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 07:02:47,062 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 07:02:47,126 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 07:02:47,132 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 07:02:47,216 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-19 07:02:47,217 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 56 treesize of output 38 [2024-11-19 07:02:47,223 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 27 treesize of output 22 [2024-11-19 07:02:48,056 INFO L349 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2024-11-19 07:02:48,056 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 1 case distinctions, treesize of input 22 treesize of output 29 [2024-11-19 07:02:48,386 INFO L349 Elim1Store]: treesize reduction 80, result has 48.1 percent of original size [2024-11-19 07:02:48,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 203 [2024-11-19 07:02:48,430 INFO L349 Elim1Store]: treesize reduction 116, result has 18.3 percent of original size [2024-11-19 07:02:48,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 5 case distinctions, treesize of input 142 treesize of output 136 [2024-11-19 07:02:56,625 INFO L349 Elim1Store]: treesize reduction 17, result has 99.3 percent of original size [2024-11-19 07:02:56,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 0 disjoint index pairs (out of 190 index pairs), introduced 19 new quantified variables, introduced 189 case distinctions, treesize of input 1111 treesize of output 3366