./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2n_prepend_unequal.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/sll2n_prepend_unequal.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 277634da297b7f9e262585608ed7ad62cca7d59b0122d4e61ee1b4b78256acae --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 07:03:03,387 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 07:03:03,479 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 07:03:03,485 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 07:03:03,487 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 07:03:03,521 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 07:03:03,523 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 07:03:03,524 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 07:03:03,524 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 07:03:03,525 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 07:03:03,525 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 07:03:03,525 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 07:03:03,527 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 07:03:03,527 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 07:03:03,529 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 07:03:03,530 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 07:03:03,530 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 07:03:03,530 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 07:03:03,531 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 07:03:03,531 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 07:03:03,531 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 07:03:03,532 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 07:03:03,535 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 07:03:03,535 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 07:03:03,536 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 07:03:03,536 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 07:03:03,536 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 07:03:03,536 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 07:03:03,537 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 07:03:03,537 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 07:03:03,538 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 07:03:03,538 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 07:03:03,539 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 07:03:03,539 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 07:03:03,539 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 07:03:03,540 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 07:03:03,540 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 07:03:03,540 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 07:03:03,540 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 07:03:03,540 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 07:03:03,541 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 07:03:03,541 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 07:03:03,541 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 277634da297b7f9e262585608ed7ad62cca7d59b0122d4e61ee1b4b78256acae [2024-11-19 07:03:03,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 07:03:03,827 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 07:03:03,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 07:03:03,833 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 07:03:03,833 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 07:03:03,834 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i [2024-11-19 07:03:05,331 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 07:03:05,572 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 07:03:05,573 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i [2024-11-19 07:03:05,589 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0695d09ba/68cb3c75748f46f08b45416abd17ce2b/FLAG9d115bcb0 [2024-11-19 07:03:05,603 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0695d09ba/68cb3c75748f46f08b45416abd17ce2b [2024-11-19 07:03:05,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 07:03:05,606 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 07:03:05,607 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 07:03:05,607 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 07:03:05,611 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 07:03:05,611 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:03:05" (1/1) ... [2024-11-19 07:03:05,612 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62d26a2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:05, skipping insertion in model container [2024-11-19 07:03:05,612 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:03:05" (1/1) ... [2024-11-19 07:03:05,656 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 07:03:05,954 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 07:03:05,964 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 07:03:06,006 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 07:03:06,039 INFO L204 MainTranslator]: Completed translation [2024-11-19 07:03:06,039 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:06 WrapperNode [2024-11-19 07:03:06,040 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 07:03:06,041 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 07:03:06,041 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 07:03:06,041 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 07:03:06,048 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:06" (1/1) ... [2024-11-19 07:03:06,061 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:06" (1/1) ... [2024-11-19 07:03:06,087 INFO L138 Inliner]: procedures = 127, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 119 [2024-11-19 07:03:06,087 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 07:03:06,088 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 07:03:06,088 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 07:03:06,088 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 07:03:06,096 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:06" (1/1) ... [2024-11-19 07:03:06,096 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:06" (1/1) ... [2024-11-19 07:03:06,100 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:06" (1/1) ... [2024-11-19 07:03:06,121 INFO L175 MemorySlicer]: Split 16 memory accesses to 3 slices as follows [2, 9, 5]. 56 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 5 writes are split as follows [0, 4, 1]. [2024-11-19 07:03:06,122 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:06" (1/1) ... [2024-11-19 07:03:06,122 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:06" (1/1) ... [2024-11-19 07:03:06,135 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:06" (1/1) ... [2024-11-19 07:03:06,139 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:06" (1/1) ... [2024-11-19 07:03:06,142 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:06" (1/1) ... [2024-11-19 07:03:06,147 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:06" (1/1) ... [2024-11-19 07:03:06,152 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 07:03:06,153 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 07:03:06,153 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 07:03:06,153 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 07:03:06,158 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:06" (1/1) ... [2024-11-19 07:03:06,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 07:03:06,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:03:06,191 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 07:03:06,194 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 07:03:06,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 07:03:06,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 07:03:06,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-19 07:03:06,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 07:03:06,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 07:03:06,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-19 07:03:06,237 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-11-19 07:03:06,237 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-11-19 07:03:06,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 07:03:06,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 07:03:06,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-19 07:03:06,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-19 07:03:06,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-19 07:03:06,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-19 07:03:06,238 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-19 07:03:06,238 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-19 07:03:06,238 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-19 07:03:06,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-19 07:03:06,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-19 07:03:06,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-19 07:03:06,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-19 07:03:06,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 07:03:06,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 07:03:06,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-19 07:03:06,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 07:03:06,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 07:03:06,386 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 07:03:06,388 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 07:03:06,691 INFO L? ?]: Removed 92 outVars from TransFormulas that were not future-live. [2024-11-19 07:03:06,691 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 07:03:06,707 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 07:03:06,709 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-19 07:03:06,710 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:03:06 BoogieIcfgContainer [2024-11-19 07:03:06,710 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 07:03:06,713 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 07:03:06,717 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 07:03:06,720 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 07:03:06,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:03:05" (1/3) ... [2024-11-19 07:03:06,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4433324b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:03:06, skipping insertion in model container [2024-11-19 07:03:06,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:06" (2/3) ... [2024-11-19 07:03:06,723 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4433324b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:03:06, skipping insertion in model container [2024-11-19 07:03:06,723 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:03:06" (3/3) ... [2024-11-19 07:03:06,724 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_prepend_unequal.i [2024-11-19 07:03:06,741 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 07:03:06,741 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2024-11-19 07:03:06,780 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 07:03:06,786 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;@2ae1a00e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 07:03:06,787 INFO L334 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2024-11-19 07:03:06,792 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 80 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 07:03:06,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-19 07:03:06,802 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:03:06,803 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:03:06,804 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 07:03:06,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:03:06,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1813689273, now seen corresponding path program 1 times [2024-11-19 07:03:06,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:03:06,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622928660] [2024-11-19 07:03:06,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:03:06,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:03:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:03:07,118 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 07:03:07,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:03:07,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622928660] [2024-11-19 07:03:07,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622928660] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:03:07,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:03:07,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 07:03:07,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381325405] [2024-11-19 07:03:07,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:03:07,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 07:03:07,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:03:07,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 07:03:07,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 07:03:07,163 INFO L87 Difference]: Start difference. First operand has 84 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 80 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) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 07:03:07,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:03:07,264 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2024-11-19 07:03:07,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 07:03:07,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-19 07:03:07,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:03:07,275 INFO L225 Difference]: With dead ends: 81 [2024-11-19 07:03:07,276 INFO L226 Difference]: Without dead ends: 78 [2024-11-19 07:03:07,279 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 07:03:07,284 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 2 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:03:07,285 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 130 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 07:03:07,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-19 07:03:07,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-11-19 07:03:07,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 74 states have internal predecessors, (79), 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 07:03:07,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2024-11-19 07:03:07,330 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 7 [2024-11-19 07:03:07,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:03:07,331 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2024-11-19 07:03:07,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 07:03:07,332 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2024-11-19 07:03:07,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-19 07:03:07,332 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:03:07,333 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:03:07,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 07:03:07,334 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 07:03:07,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:03:07,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1813689274, now seen corresponding path program 1 times [2024-11-19 07:03:07,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:03:07,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671649944] [2024-11-19 07:03:07,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:03:07,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:03:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:03:07,497 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 07:03:07,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:03:07,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671649944] [2024-11-19 07:03:07,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671649944] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:03:07,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:03:07,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 07:03:07,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081657889] [2024-11-19 07:03:07,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:03:07,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 07:03:07,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:03:07,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 07:03:07,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 07:03:07,503 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 07:03:07,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:03:07,576 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2024-11-19 07:03:07,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 07:03:07,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-19 07:03:07,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:03:07,578 INFO L225 Difference]: With dead ends: 76 [2024-11-19 07:03:07,578 INFO L226 Difference]: Without dead ends: 76 [2024-11-19 07:03:07,578 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 07:03:07,579 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 2 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:03:07,580 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 129 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 07:03:07,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-19 07:03:07,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-11-19 07:03:07,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 46 states have (on average 1.673913043478261) internal successors, (77), 72 states have internal predecessors, (77), 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 07:03:07,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2024-11-19 07:03:07,590 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 7 [2024-11-19 07:03:07,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:03:07,590 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2024-11-19 07:03:07,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 07:03:07,591 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2024-11-19 07:03:07,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-19 07:03:07,592 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:03:07,592 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:03:07,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 07:03:07,592 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 07:03:07,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:03:07,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1665271744, now seen corresponding path program 1 times [2024-11-19 07:03:07,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:03:07,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658768069] [2024-11-19 07:03:07,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:03:07,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:03:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:03:07,774 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 07:03:07,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:03:07,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658768069] [2024-11-19 07:03:07,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658768069] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:03:07,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:03:07,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 07:03:07,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704242506] [2024-11-19 07:03:07,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:03:07,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 07:03:07,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:03:07,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 07:03:07,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-19 07:03:07,781 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 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 07:03:07,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:03:07,949 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2024-11-19 07:03:07,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 07:03:07,950 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 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 07:03:07,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:03:07,952 INFO L225 Difference]: With dead ends: 75 [2024-11-19 07:03:07,954 INFO L226 Difference]: Without dead ends: 75 [2024-11-19 07:03:07,954 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 07:03:07,955 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 2 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 07:03:07,956 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 241 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 07:03:07,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-19 07:03:07,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-11-19 07:03:07,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 71 states have internal predecessors, (76), 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 07:03:07,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2024-11-19 07:03:07,970 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 13 [2024-11-19 07:03:07,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:03:07,973 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2024-11-19 07:03:07,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 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 07:03:07,974 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2024-11-19 07:03:07,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-19 07:03:07,975 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:03:07,975 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:03:07,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 07:03:07,976 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 07:03:07,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:03:07,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1665271745, now seen corresponding path program 1 times [2024-11-19 07:03:07,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:03:07,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500357662] [2024-11-19 07:03:07,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:03:07,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:03:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:03:08,226 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 07:03:08,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:03:08,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500357662] [2024-11-19 07:03:08,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500357662] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:03:08,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:03:08,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 07:03:08,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687853538] [2024-11-19 07:03:08,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:03:08,228 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 07:03:08,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:03:08,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 07:03:08,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-19 07:03:08,229 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 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 07:03:08,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:03:08,339 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2024-11-19 07:03:08,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 07:03:08,340 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 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 07:03:08,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:03:08,341 INFO L225 Difference]: With dead ends: 74 [2024-11-19 07:03:08,342 INFO L226 Difference]: Without dead ends: 74 [2024-11-19 07:03:08,343 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 07:03:08,344 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 1 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:03:08,344 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 257 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 07:03:08,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-19 07:03:08,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-11-19 07:03:08,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 46 states have (on average 1.6304347826086956) internal successors, (75), 70 states have internal predecessors, (75), 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 07:03:08,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2024-11-19 07:03:08,354 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 13 [2024-11-19 07:03:08,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:03:08,355 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2024-11-19 07:03:08,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 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 07:03:08,356 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2024-11-19 07:03:08,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-19 07:03:08,357 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:03:08,357 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:03:08,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 07:03:08,357 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 07:03:08,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:03:08,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1103069376, now seen corresponding path program 1 times [2024-11-19 07:03:08,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:03:08,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828862090] [2024-11-19 07:03:08,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:03:08,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:03:08,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:03:08,480 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 07:03:08,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:03:08,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828862090] [2024-11-19 07:03:08,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828862090] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:03:08,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:03:08,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 07:03:08,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204584751] [2024-11-19 07:03:08,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:03:08,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 07:03:08,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:03:08,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 07:03:08,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 07:03:08,487 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 07:03:08,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:03:08,510 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2024-11-19 07:03:08,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 07:03:08,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 15 [2024-11-19 07:03:08,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:03:08,512 INFO L225 Difference]: With dead ends: 80 [2024-11-19 07:03:08,512 INFO L226 Difference]: Without dead ends: 80 [2024-11-19 07:03:08,512 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 07:03:08,513 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 4 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 151 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 07:03:08,514 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 151 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 07:03:08,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-19 07:03:08,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2024-11-19 07:03:08,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 71 states have internal predecessors, (76), 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 07:03:08,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2024-11-19 07:03:08,547 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 15 [2024-11-19 07:03:08,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:03:08,548 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2024-11-19 07:03:08,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 07:03:08,552 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2024-11-19 07:03:08,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-19 07:03:08,553 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:03:08,553 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] [2024-11-19 07:03:08,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 07:03:08,553 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 07:03:08,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:03:08,554 INFO L85 PathProgramCache]: Analyzing trace with hash -719027390, now seen corresponding path program 1 times [2024-11-19 07:03:08,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:03:08,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384160580] [2024-11-19 07:03:08,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:03:08,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:03:08,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:03:08,680 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 07:03:08,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:03:08,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384160580] [2024-11-19 07:03:08,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384160580] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:03:08,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689179355] [2024-11-19 07:03:08,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:03:08,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:03:08,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:03:08,685 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 07:03:08,687 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 07:03:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:03:08,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 07:03:08,831 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:03:08,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:03:08,893 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:03:08,950 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 07:03:08,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689179355] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 07:03:08,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 07:03:08,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-11-19 07:03:08,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917219685] [2024-11-19 07:03:08,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 07:03:08,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 07:03:08,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:03:08,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 07:03:08,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-19 07:03:08,954 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-19 07:03:08,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:03:08,976 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2024-11-19 07:03:08,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 07:03:08,980 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2024-11-19 07:03:08,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:03:08,980 INFO L225 Difference]: With dead ends: 81 [2024-11-19 07:03:08,981 INFO L226 Difference]: Without dead ends: 81 [2024-11-19 07:03:08,981 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-19 07:03:08,981 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 4 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 07:03:08,982 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 293 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 07:03:08,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-19 07:03:08,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-11-19 07:03:08,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 76 states have internal predecessors, (81), 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 07:03:08,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2024-11-19 07:03:08,989 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 28 [2024-11-19 07:03:08,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:03:08,990 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2024-11-19 07:03:08,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-19 07:03:08,990 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2024-11-19 07:03:08,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-19 07:03:08,991 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:03:08,991 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:03:09,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 07:03:09,195 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 07:03:09,196 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 07:03:09,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:03:09,197 INFO L85 PathProgramCache]: Analyzing trace with hash 471016448, now seen corresponding path program 2 times [2024-11-19 07:03:09,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:03:09,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988484692] [2024-11-19 07:03:09,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 07:03:09,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:03:09,256 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 07:03:09,256 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 07:03:09,852 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 07:03:09,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:03:09,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988484692] [2024-11-19 07:03:09,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988484692] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:03:09,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926380397] [2024-11-19 07:03:09,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 07:03:09,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:03:09,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:03:09,857 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 07:03:09,862 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 07:03:10,013 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 07:03:10,014 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 07:03:10,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-19 07:03:10,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:03:10,054 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 07:03:10,086 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 07:03:10,158 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 07:03:10,158 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 07:03:10,277 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 07:03:10,295 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))))) is different from true [2024-11-19 07:03:10,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:03:10,349 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 07:03:10,372 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2024-11-19 07:03:10,401 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-19 07:03:10,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-19 07:03:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 18 not checked. [2024-11-19 07:03:10,425 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:03:10,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926380397] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:03:10,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:03:10,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2024-11-19 07:03:10,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031417735] [2024-11-19 07:03:10,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:03:10,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 07:03:10,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:03:10,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 07:03:10,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=254, Unknown=2, NotChecked=66, Total=380 [2024-11-19 07:03:10,667 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-19 07:03:11,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:03:11,029 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2024-11-19 07:03:11,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 07:03:11,029 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2024-11-19 07:03:11,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:03:11,030 INFO L225 Difference]: With dead ends: 89 [2024-11-19 07:03:11,030 INFO L226 Difference]: Without dead ends: 89 [2024-11-19 07:03:11,031 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=343, Unknown=2, NotChecked=78, Total=506 [2024-11-19 07:03:11,031 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 216 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 07:03:11,031 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 308 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 329 Invalid, 0 Unknown, 164 Unchecked, 0.3s Time] [2024-11-19 07:03:11,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-19 07:03:11,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2024-11-19 07:03:11,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.4807692307692308) internal successors, (77), 72 states have internal predecessors, (77), 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 07:03:11,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2024-11-19 07:03:11,036 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 41 [2024-11-19 07:03:11,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:03:11,037 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2024-11-19 07:03:11,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-19 07:03:11,037 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2024-11-19 07:03:11,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-19 07:03:11,038 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:03:11,038 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:03:11,056 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 07:03:11,242 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 07:03:11,243 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 07:03:11,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:03:11,243 INFO L85 PathProgramCache]: Analyzing trace with hash 471016449, now seen corresponding path program 1 times [2024-11-19 07:03:11,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:03:11,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722429159] [2024-11-19 07:03:11,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:03:11,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:03:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:03:11,841 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 07:03:11,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:03:11,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722429159] [2024-11-19 07:03:11,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722429159] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:03:11,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258386880] [2024-11-19 07:03:11,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:03:11,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:03:11,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:03:11,846 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 07:03:11,848 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 07:03:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:03:11,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-19 07:03:11,999 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:03:12,011 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 07:03:12,043 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 07:03:12,052 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 07:03:12,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:03:12,103 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 07:03:12,145 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 07:03:12,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:03:12,190 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 07:03:12,275 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 07:03:12,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:03:12,317 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 07:03:12,338 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-19 07:03:12,338 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 07:03:12,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258386880] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:03:12,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 07:03:12,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2024-11-19 07:03:12,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641865772] [2024-11-19 07:03:12,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:03:12,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 07:03:12,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:03:12,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 07:03:12,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=169, Unknown=1, NotChecked=26, Total=240 [2024-11-19 07:03:12,340 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 7 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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 07:03:12,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:03:12,439 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2024-11-19 07:03:12,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 07:03:12,440 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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) Word has length 41 [2024-11-19 07:03:12,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:03:12,440 INFO L225 Difference]: With dead ends: 75 [2024-11-19 07:03:12,440 INFO L226 Difference]: Without dead ends: 75 [2024-11-19 07:03:12,441 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=194, Unknown=1, NotChecked=28, Total=272 [2024-11-19 07:03:12,441 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 6 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:03:12,442 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 210 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 97 Unchecked, 0.1s Time] [2024-11-19 07:03:12,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-19 07:03:12,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-11-19 07:03:12,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 70 states have internal predecessors, (75), 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 07:03:12,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2024-11-19 07:03:12,446 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 41 [2024-11-19 07:03:12,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:03:12,447 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2024-11-19 07:03:12,447 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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 07:03:12,447 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2024-11-19 07:03:12,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-19 07:03:12,448 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:03:12,448 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:03:12,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-19 07:03:12,652 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 07:03:12,653 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 07:03:12,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:03:12,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1716608001, now seen corresponding path program 1 times [2024-11-19 07:03:12,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:03:12,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583332631] [2024-11-19 07:03:12,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:03:12,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:03:12,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:03:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-19 07:03:12,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:03:12,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583332631] [2024-11-19 07:03:12,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583332631] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:03:12,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:03:12,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 07:03:12,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398709467] [2024-11-19 07:03:12,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:03:12,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 07:03:12,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:03:12,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 07:03:12,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-19 07:03:12,869 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 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 07:03:12,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:03:12,966 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2024-11-19 07:03:12,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 07:03:12,966 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 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 42 [2024-11-19 07:03:12,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:03:12,967 INFO L225 Difference]: With dead ends: 74 [2024-11-19 07:03:12,967 INFO L226 Difference]: Without dead ends: 74 [2024-11-19 07:03:12,968 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 07:03:12,968 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 2 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:03:12,968 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 229 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 07:03:12,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-19 07:03:12,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-11-19 07:03:12,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 52 states have (on average 1.4230769230769231) internal successors, (74), 69 states have internal predecessors, (74), 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 07:03:12,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2024-11-19 07:03:12,976 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 42 [2024-11-19 07:03:12,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:03:12,976 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2024-11-19 07:03:12,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 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 07:03:12,977 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2024-11-19 07:03:12,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-19 07:03:12,979 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:03:12,979 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:03:12,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-19 07:03:12,980 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 07:03:12,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:03:12,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1716608000, now seen corresponding path program 1 times [2024-11-19 07:03:12,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:03:12,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019366936] [2024-11-19 07:03:12,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:03:12,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:03:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:03:13,079 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-19 07:03:13,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:03:13,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019366936] [2024-11-19 07:03:13,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019366936] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:03:13,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:03:13,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 07:03:13,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928609997] [2024-11-19 07:03:13,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:03:13,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 07:03:13,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:03:13,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 07:03:13,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-19 07:03:13,082 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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 07:03:13,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:03:13,169 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2024-11-19 07:03:13,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 07:03:13,170 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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 42 [2024-11-19 07:03:13,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:03:13,171 INFO L225 Difference]: With dead ends: 73 [2024-11-19 07:03:13,171 INFO L226 Difference]: Without dead ends: 73 [2024-11-19 07:03:13,171 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 07:03:13,172 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 3 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:03:13,172 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 221 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 07:03:13,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-19 07:03:13,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-11-19 07:03:13,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 68 states have internal predecessors, (73), 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 07:03:13,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2024-11-19 07:03:13,176 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 42 [2024-11-19 07:03:13,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:03:13,177 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2024-11-19 07:03:13,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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 07:03:13,177 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2024-11-19 07:03:13,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-19 07:03:13,178 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:03:13,178 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:03:13,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 07:03:13,178 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 07:03:13,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:03:13,179 INFO L85 PathProgramCache]: Analyzing trace with hash -431699677, now seen corresponding path program 1 times [2024-11-19 07:03:13,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:03:13,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524842937] [2024-11-19 07:03:13,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:03:13,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:03:13,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:03:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-19 07:03:13,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:03:13,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524842937] [2024-11-19 07:03:13,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524842937] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:03:13,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:03:13,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 07:03:13,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90936013] [2024-11-19 07:03:13,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:03:13,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 07:03:13,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:03:13,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 07:03:13,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-19 07:03:13,399 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 7 states, 5 states have (on average 4.6) internal successors, (23), 7 states have internal predecessors, (23), 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 07:03:13,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:03:13,478 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2024-11-19 07:03:13,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 07:03:13,478 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 4.6) internal successors, (23), 7 states have internal predecessors, (23), 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) Word has length 46 [2024-11-19 07:03:13,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:03:13,479 INFO L225 Difference]: With dead ends: 71 [2024-11-19 07:03:13,479 INFO L226 Difference]: Without dead ends: 71 [2024-11-19 07:03:13,479 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-11-19 07:03:13,480 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 32 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:03:13,480 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 182 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 07:03:13,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-19 07:03:13,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-11-19 07:03:13,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 66 states have internal predecessors, (71), 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 07:03:13,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2024-11-19 07:03:13,489 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 46 [2024-11-19 07:03:13,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:03:13,489 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2024-11-19 07:03:13,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 4.6) internal successors, (23), 7 states have internal predecessors, (23), 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 07:03:13,489 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2024-11-19 07:03:13,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-19 07:03:13,490 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:03:13,490 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:03:13,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-19 07:03:13,490 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 07:03:13,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:03:13,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1748437539, now seen corresponding path program 1 times [2024-11-19 07:03:13,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:03:13,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641783693] [2024-11-19 07:03:13,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:03:13,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:03:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:03:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-19 07:03:13,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:03:13,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641783693] [2024-11-19 07:03:13,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641783693] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:03:13,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:03:13,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 07:03:13,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426777691] [2024-11-19 07:03:13,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:03:13,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 07:03:13,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:03:13,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 07:03:13,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-19 07:03:13,741 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 10 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 07:03:13,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:03:13,896 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2024-11-19 07:03:13,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 07:03:13,896 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2024-11-19 07:03:13,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:03:13,897 INFO L225 Difference]: With dead ends: 72 [2024-11-19 07:03:13,897 INFO L226 Difference]: Without dead ends: 72 [2024-11-19 07:03:13,897 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-11-19 07:03:13,898 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 35 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:03:13,898 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 271 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 07:03:13,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-19 07:03:13,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2024-11-19 07:03:13,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 63 states have internal predecessors, (68), 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 07:03:13,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2024-11-19 07:03:13,907 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 48 [2024-11-19 07:03:13,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:03:13,907 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2024-11-19 07:03:13,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 07:03:13,908 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2024-11-19 07:03:13,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-19 07:03:13,909 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:03:13,909 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:03:13,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-19 07:03:13,909 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 07:03:13,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:03:13,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1748437540, now seen corresponding path program 1 times [2024-11-19 07:03:13,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:03:13,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150833561] [2024-11-19 07:03:13,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:03:13,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:03:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:03:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-19 07:03:14,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:03:14,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150833561] [2024-11-19 07:03:14,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150833561] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:03:14,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:03:14,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 07:03:14,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745805500] [2024-11-19 07:03:14,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:03:14,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 07:03:14,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:03:14,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 07:03:14,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-19 07:03:14,329 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 07:03:14,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:03:14,471 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2024-11-19 07:03:14,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 07:03:14,472 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2024-11-19 07:03:14,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:03:14,473 INFO L225 Difference]: With dead ends: 70 [2024-11-19 07:03:14,473 INFO L226 Difference]: Without dead ends: 70 [2024-11-19 07:03:14,473 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-11-19 07:03:14,473 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 31 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:03:14,474 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 294 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 07:03:14,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-19 07:03:14,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2024-11-19 07:03:14,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 61 states have internal predecessors, (66), 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 07:03:14,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2024-11-19 07:03:14,476 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 48 [2024-11-19 07:03:14,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:03:14,477 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2024-11-19 07:03:14,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 07:03:14,477 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2024-11-19 07:03:14,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-19 07:03:14,478 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:03:14,478 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2024-11-19 07:03:14,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-19 07:03:14,478 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 07:03:14,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:03:14,479 INFO L85 PathProgramCache]: Analyzing trace with hash 60337667, now seen corresponding path program 1 times [2024-11-19 07:03:14,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:03:14,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704125347] [2024-11-19 07:03:14,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:03:14,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:03:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:03:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-19 07:03:15,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:03:15,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704125347] [2024-11-19 07:03:15,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704125347] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:03:15,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:03:15,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-19 07:03:15,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849539009] [2024-11-19 07:03:15,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:03:15,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 07:03:15,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:03:15,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 07:03:15,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-11-19 07:03:15,018 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 07:03:15,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:03:15,197 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2024-11-19 07:03:15,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 07:03:15,198 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2024-11-19 07:03:15,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:03:15,198 INFO L225 Difference]: With dead ends: 66 [2024-11-19 07:03:15,198 INFO L226 Difference]: Without dead ends: 66 [2024-11-19 07:03:15,199 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2024-11-19 07:03:15,199 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 8 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:03:15,199 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 478 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 07:03:15,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-19 07:03:15,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-11-19 07:03:15,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 52 states have (on average 1.25) internal successors, (65), 61 states have internal predecessors, (65), 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 07:03:15,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2024-11-19 07:03:15,202 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 52 [2024-11-19 07:03:15,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:03:15,202 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2024-11-19 07:03:15,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-19 07:03:15,202 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2024-11-19 07:03:15,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-19 07:03:15,206 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:03:15,206 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2024-11-19 07:03:15,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-19 07:03:15,206 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 07:03:15,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:03:15,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1870435285, now seen corresponding path program 1 times [2024-11-19 07:03:15,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:03:15,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481834724] [2024-11-19 07:03:15,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:03:15,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:03:15,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:03:16,109 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 07:03:16,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:03:16,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481834724] [2024-11-19 07:03:16,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481834724] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:03:16,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096111117] [2024-11-19 07:03:16,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:03:16,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:03:16,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:03:16,112 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 07:03:16,113 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 07:03:16,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:03:16,283 INFO L255 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-19 07:03:16,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:03:16,320 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 07:03:16,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-19 07:03:16,615 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-19 07:03:16,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 21 [2024-11-19 07:03:16,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-11-19 07:03:16,930 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 07:03:16,932 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 07:03:16,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 46 treesize of output 23 [2024-11-19 07:03:16,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-19 07:03:17,043 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 07:03:17,044 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 36 treesize of output 24 [2024-11-19 07:03:17,052 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 07:03:17,059 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 07:03:17,059 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 23 treesize of output 18 [2024-11-19 07:03:17,157 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 9 [2024-11-19 07:03:17,188 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 07:03:17,189 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:03:17,303 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 68 treesize of output 64 [2024-11-19 07:03:25,426 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 46 treesize of output 36 [2024-11-19 07:03:25,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096111117] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:03:25,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:03:25,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2024-11-19 07:03:25,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463009920] [2024-11-19 07:03:25,866 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:03:25,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-19 07:03:25,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:03:25,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-19 07:03:25,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1831, Unknown=2, NotChecked=0, Total=1980 [2024-11-19 07:03:25,868 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 37 states, 34 states have (on average 2.264705882352941) internal successors, (77), 32 states have internal predecessors, (77), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-19 07:03:26,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:03:26,965 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2024-11-19 07:03:26,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-19 07:03:26,966 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 2.264705882352941) internal successors, (77), 32 states have internal predecessors, (77), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 53 [2024-11-19 07:03:26,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:03:26,966 INFO L225 Difference]: With dead ends: 68 [2024-11-19 07:03:26,966 INFO L226 Difference]: Without dead ends: 68 [2024-11-19 07:03:26,968 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=277, Invalid=3027, Unknown=2, NotChecked=0, Total=3306 [2024-11-19 07:03:26,968 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 85 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-19 07:03:26,969 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 701 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1108 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-19 07:03:26,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-19 07:03:26,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-11-19 07:03:26,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 63 states have internal predecessors, (69), 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 07:03:26,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2024-11-19 07:03:26,972 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 53 [2024-11-19 07:03:26,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:03:26,972 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2024-11-19 07:03:26,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 2.264705882352941) internal successors, (77), 32 states have internal predecessors, (77), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-19 07:03:26,972 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2024-11-19 07:03:26,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-19 07:03:26,973 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:03:26,973 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2024-11-19 07:03:26,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 07:03:27,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-19 07:03:27,178 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 07:03:27,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:03:27,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1870435286, now seen corresponding path program 1 times [2024-11-19 07:03:27,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:03:27,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921999511] [2024-11-19 07:03:27,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:03:27,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:03:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:03:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 07:03:28,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:03:28,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921999511] [2024-11-19 07:03:28,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921999511] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:03:28,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967686483] [2024-11-19 07:03:28,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:03:28,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:03:28,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:03:28,614 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 07:03:28,615 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 07:03:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:03:28,793 INFO L255 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-19 07:03:28,799 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:03:28,837 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 07:03:28,844 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 07:03:29,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-19 07:03:29,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-19 07:03:29,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-19 07:03:29,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-19 07:03:29,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-19 07:03:29,361 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 25 treesize of output 13 [2024-11-19 07:03:29,482 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-19 07:03:29,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 21 [2024-11-19 07:03:29,516 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-19 07:03:29,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-19 07:03:29,873 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 17 [2024-11-19 07:03:29,881 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 17 [2024-11-19 07:03:30,061 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 07:03:30,087 INFO L349 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2024-11-19 07:03:30,087 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 39 [2024-11-19 07:03:30,096 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 07:03:30,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 58 treesize of output 31 [2024-11-19 07:03:30,229 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 66 treesize of output 46 [2024-11-19 07:03:30,233 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 50 treesize of output 34 [2024-11-19 07:03:30,355 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 13 [2024-11-19 07:03:30,360 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 9 treesize of output 3 [2024-11-19 07:03:30,407 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 07:03:30,407 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:03:31,459 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 825 treesize of output 765 [2024-11-19 07:03:31,472 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 1656 treesize of output 1506 [2024-11-19 07:03:33,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967686483] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:03:33,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:03:33,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 40 [2024-11-19 07:03:33,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764350450] [2024-11-19 07:03:33,381 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:03:33,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-19 07:03:33,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:03:33,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-19 07:03:33,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2493, Unknown=0, NotChecked=0, Total=2652 [2024-11-19 07:03:33,383 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand has 41 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 35 states have internal predecessors, (81), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-19 07:03:34,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:03:34,883 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2024-11-19 07:03:34,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-19 07:03:34,884 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 35 states have internal predecessors, (81), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 53 [2024-11-19 07:03:34,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:03:34,884 INFO L225 Difference]: With dead ends: 77 [2024-11-19 07:03:34,884 INFO L226 Difference]: Without dead ends: 77 [2024-11-19 07:03:34,886 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=292, Invalid=4264, Unknown=0, NotChecked=0, Total=4556 [2024-11-19 07:03:34,886 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 84 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-19 07:03:34,887 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 806 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-19 07:03:34,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-19 07:03:34,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-11-19 07:03:34,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 71 states have internal predecessors, (76), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 07:03:34,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2024-11-19 07:03:34,890 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 53 [2024-11-19 07:03:34,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:03:34,890 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2024-11-19 07:03:34,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 35 states have internal predecessors, (81), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-19 07:03:34,891 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2024-11-19 07:03:34,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-19 07:03:34,892 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:03:34,892 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2024-11-19 07:03:34,911 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 07:03:35,093 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,SelfDestructingSolverStorable15 [2024-11-19 07:03:35,094 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 07:03:35,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:03:35,094 INFO L85 PathProgramCache]: Analyzing trace with hash -769381878, now seen corresponding path program 1 times [2024-11-19 07:03:35,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:03:35,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535765312] [2024-11-19 07:03:35,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:03:35,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:03:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:03:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 07:03:35,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:03:35,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535765312] [2024-11-19 07:03:35,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535765312] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:03:35,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060468495] [2024-11-19 07:03:35,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:03:35,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:03:35,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:03:35,868 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 07:03:35,870 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 07:03:36,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:03:36,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-19 07:03:36,034 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:03:36,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-11-19 07:03:36,367 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 07:03:36,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 45 treesize of output 33 [2024-11-19 07:03:36,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-19 07:03:36,429 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 07:03:36,430 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 26 treesize of output 18 [2024-11-19 07:03:36,433 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 07:03:36,435 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 07:03:36,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 17 [2024-11-19 07:03:36,485 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 8 [2024-11-19 07:03:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 07:03:36,488 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:03:36,524 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 66 treesize of output 62 [2024-11-19 07:03:36,590 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 44 treesize of output 34 [2024-11-19 07:03:36,717 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 07:03:36,718 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 21 treesize of output 21 [2024-11-19 07:03:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-19 07:03:36,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060468495] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 07:03:36,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 07:03:36,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 17] total 40 [2024-11-19 07:03:36,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350523283] [2024-11-19 07:03:36,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 07:03:36,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-19 07:03:36,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:03:36,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-19 07:03:36,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1440, Unknown=0, NotChecked=0, Total=1560 [2024-11-19 07:03:36,909 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 36 states have internal predecessors, (93), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-19 07:03:40,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-19 07:03:44,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-19 07:03:49,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-19 07:03:53,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-19 07:03:57,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-19 07:03:57,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:03:57,703 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2024-11-19 07:03:57,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-19 07:03:57,703 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 36 states have internal predecessors, (93), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 56 [2024-11-19 07:03:57,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:03:57,704 INFO L225 Difference]: With dead ends: 77 [2024-11-19 07:03:57,704 INFO L226 Difference]: Without dead ends: 77 [2024-11-19 07:03:57,705 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=251, Invalid=2829, Unknown=0, NotChecked=0, Total=3080 [2024-11-19 07:03:57,705 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 87 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.4s IncrementalHoareTripleChecker+Time [2024-11-19 07:03:57,706 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 1112 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 868 Invalid, 5 Unknown, 0 Unchecked, 20.4s Time] [2024-11-19 07:03:57,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-19 07:03:57,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-11-19 07:03:57,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 71 states have internal predecessors, (75), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 07:03:57,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2024-11-19 07:03:57,708 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 56 [2024-11-19 07:03:57,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:03:57,708 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2024-11-19 07:03:57,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 36 states have internal predecessors, (93), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-19 07:03:57,709 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2024-11-19 07:03:57,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-19 07:03:57,709 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:03:57,710 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2024-11-19 07:03:57,724 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 07:03:57,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-19 07:03:57,910 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 07:03:57,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:03:57,911 INFO L85 PathProgramCache]: Analyzing trace with hash 603644440, now seen corresponding path program 1 times [2024-11-19 07:03:57,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:03:57,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729583444] [2024-11-19 07:03:57,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:03:57,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:03:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:03:59,827 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:03:59,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:03:59,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729583444] [2024-11-19 07:03:59,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729583444] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:03:59,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312027806] [2024-11-19 07:03:59,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:03:59,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:03:59,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:03:59,829 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 07:03:59,830 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 07:04:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:04:00,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-11-19 07:04:00,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:04:00,210 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 07:04:00,211 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 07:04:00,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-19 07:04:00,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 5 [2024-11-19 07:04:00,568 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-19 07:04:00,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2024-11-19 07:04:00,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:04:00,750 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 28 treesize of output 23 [2024-11-19 07:04:00,774 INFO L349 Elim1Store]: treesize reduction 120, result has 31.4 percent of original size [2024-11-19 07:04:00,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 64 [2024-11-19 07:04:01,049 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 17 treesize of output 13 [2024-11-19 07:04:01,061 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 55 treesize of output 40 [2024-11-19 07:04:01,183 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 07:04:01,184 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 07:04:01,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 99 treesize of output 64 [2024-11-19 07:04:01,192 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 07:04:01,193 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 07:04:01,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 98 treesize of output 71 [2024-11-19 07:04:01,319 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 07:04:01,320 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 139 treesize of output 99 [2024-11-19 07:04:01,324 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 07:04:01,326 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 07:04:01,326 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 98 treesize of output 73 [2024-11-19 07:04:01,475 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 55 treesize of output 37 [2024-11-19 07:04:01,706 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-19 07:04:01,707 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 25 [2024-11-19 07:04:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:04:01,953 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:04:02,355 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 218 treesize of output 188 [2024-11-19 07:04:04,016 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 07:04:04,017 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 67 [2024-11-19 07:04:04,037 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 07:04:04,038 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 159 [2024-11-19 07:04:07,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312027806] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:04:07,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:04:07,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 29] total 59 [2024-11-19 07:04:07,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071076016] [2024-11-19 07:04:07,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:04:07,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-19 07:04:07,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:04:07,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-19 07:04:07,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=4727, Unknown=0, NotChecked=0, Total=4970 [2024-11-19 07:04:07,021 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 60 states, 57 states have (on average 1.8070175438596492) internal successors, (103), 53 states have internal predecessors, (103), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-19 07:04:10,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:04:10,817 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2024-11-19 07:04:10,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-19 07:04:10,817 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 57 states have (on average 1.8070175438596492) internal successors, (103), 53 states have internal predecessors, (103), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 58 [2024-11-19 07:04:10,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:04:10,818 INFO L225 Difference]: With dead ends: 87 [2024-11-19 07:04:10,818 INFO L226 Difference]: Without dead ends: 87 [2024-11-19 07:04:10,821 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1992 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=500, Invalid=8430, Unknown=0, NotChecked=0, Total=8930 [2024-11-19 07:04:10,821 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 94 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 1892 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 1907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-19 07:04:10,821 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 1020 Invalid, 1907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1892 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-19 07:04:10,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-19 07:04:10,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 80. [2024-11-19 07:04:10,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 74 states have internal predecessors, (81), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 07:04:10,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2024-11-19 07:04:10,824 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 58 [2024-11-19 07:04:10,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:04:10,825 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2024-11-19 07:04:10,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 57 states have (on average 1.8070175438596492) internal successors, (103), 53 states have internal predecessors, (103), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-19 07:04:10,825 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2024-11-19 07:04:10,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-19 07:04:10,826 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:04:10,826 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2024-11-19 07:04:10,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-19 07:04:11,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:04:11,027 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 07:04:11,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:04:11,027 INFO L85 PathProgramCache]: Analyzing trace with hash 603644441, now seen corresponding path program 1 times [2024-11-19 07:04:11,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:04:11,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840729971] [2024-11-19 07:04:11,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:04:11,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:04:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:04:13,742 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:04:13,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:04:13,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840729971] [2024-11-19 07:04:13,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840729971] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:04:13,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895764158] [2024-11-19 07:04:13,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:04:13,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:04:13,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:04:13,744 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 07:04:13,745 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 07:04:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:04:13,916 INFO L255 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 128 conjuncts are in the unsatisfiable core [2024-11-19 07:04:13,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:04:13,960 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 07:04:14,377 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-19 07:04:14,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-19 07:04:14,388 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 07:04:14,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-19 07:04:14,553 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 19 treesize of output 1 [2024-11-19 07:04:14,874 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 61 treesize of output 19 [2024-11-19 07:04:14,878 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 17 treesize of output 3 [2024-11-19 07:04:14,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-19 07:04:14,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-19 07:04:15,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:04:15,130 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 69 treesize of output 52 [2024-11-19 07:04:15,152 INFO L349 Elim1Store]: treesize reduction 41, result has 47.4 percent of original size [2024-11-19 07:04:15,152 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 28 treesize of output 41 [2024-11-19 07:04:15,174 INFO L349 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2024-11-19 07:04:15,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2024-11-19 07:04:15,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2024-11-19 07:04:15,495 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 77 treesize of output 48 [2024-11-19 07:04:15,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 34 [2024-11-19 07:04:15,679 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 07:04:15,681 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 07:04:15,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 129 treesize of output 86 [2024-11-19 07:04:15,687 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 07:04:15,688 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 07:04:15,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 167 treesize of output 132 [2024-11-19 07:04:15,886 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 07:04:15,888 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 200 treesize of output 148 [2024-11-19 07:04:15,893 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 07:04:15,896 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 07:04:15,897 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 152 treesize of output 111